/* * Copyright (C) 2005 Junio C Hamano */ #include "cache.h" #include "quote.h" #include "diff.h" #include "diffcore.h" #include "delta.h" #include "xdiff-interface.h" #include "color.h" #include "attr.h" #include "run-command.h" #include "utf8.h" #include "userdiff.h" #include "sigchain.h" #include "submodule.h" #include "ll-merge.h" #include "string-list.h" #include "argv-array.h" #ifdef NO_FAST_WORKING_DIRECTORY #define FAST_WORKING_DIRECTORY 0 #else #define FAST_WORKING_DIRECTORY 1 #endif static int diff_detect_rename_default; static int diff_rename_limit_default = 400; static int diff_suppress_blank_empty; static int diff_use_color_default = -1; static int diff_context_default = 3; static const char *diff_word_regex_cfg; static const char *external_diff_cmd_cfg; static const char *diff_order_file_cfg; int diff_auto_refresh_index = 1; static int diff_mnemonic_prefix; static int diff_no_prefix; static int diff_stat_graph_width; static int diff_dirstat_permille_default = 30; static struct diff_options default_diff_options; static long diff_algorithm; static char diff_colors[][COLOR_MAXLEN] = { GIT_COLOR_RESET, GIT_COLOR_NORMAL, /* PLAIN */ GIT_COLOR_BOLD, /* METAINFO */ GIT_COLOR_CYAN, /* FRAGINFO */ GIT_COLOR_RED, /* OLD */ GIT_COLOR_GREEN, /* NEW */ GIT_COLOR_YELLOW, /* COMMIT */ GIT_COLOR_BG_RED, /* WHITESPACE */ GIT_COLOR_NORMAL, /* FUNCINFO */ }; static int parse_diff_color_slot(const char *var, int ofs) { if (!strcasecmp(var+ofs, "plain")) return DIFF_PLAIN; if (!strcasecmp(var+ofs, "meta")) return DIFF_METAINFO; if (!strcasecmp(var+ofs, "frag")) return DIFF_FRAGINFO; if (!strcasecmp(var+ofs, "old")) return DIFF_FILE_OLD; if (!strcasecmp(var+ofs, "new")) return DIFF_FILE_NEW; if (!strcasecmp(var+ofs, "commit")) return DIFF_COMMIT; if (!strcasecmp(var+ofs, "whitespace")) return DIFF_WHITESPACE; if (!strcasecmp(var+ofs, "func")) return DIFF_FUNCINFO; return -1; } static int parse_dirstat_params(struct diff_options *options, const char *params_string, struct strbuf *errmsg) { char *params_copy = xstrdup(params_string); struct string_list params = STRING_LIST_INIT_NODUP; int ret = 0; int i; if (*params_copy) string_list_split_in_place(¶ms, params_copy, ',', -1); for (i = 0; i < params.nr; i++) { const char *p = params.items[i].string; if (!strcmp(p, "changes")) { DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); } else if (!strcmp(p, "lines")) { DIFF_OPT_SET(options, DIRSTAT_BY_LINE); DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); } else if (!strcmp(p, "files")) { DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); DIFF_OPT_SET(options, DIRSTAT_BY_FILE); } else if (!strcmp(p, "noncumulative")) { DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); } else if (!strcmp(p, "cumulative")) { DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); } else if (isdigit(*p)) { char *end; int permille = strtoul(p, &end, 10) * 10; if (*end == '.' && isdigit(*++end)) { /* only use first digit */ permille += *end - '0'; /* .. and ignore any further digits */ while (isdigit(*++end)) ; /* nothing */ } if (!*end) options->dirstat_permille = permille; else { strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%s'\n"), p); ret++; } } else { strbuf_addf(errmsg, _(" Unknown dirstat parameter '%s'\n"), p); ret++; } } string_list_clear(¶ms, 0); free(params_copy); return ret; } static int parse_submodule_params(struct diff_options *options, const char *value) { if (!strcmp(value, "log")) DIFF_OPT_SET(options, SUBMODULE_LOG); else if (!strcmp(value, "short")) DIFF_OPT_CLR(options, SUBMODULE_LOG); else return -1; return 0; } static int git_config_rename(const char *var, const char *value) { if (!value) return DIFF_DETECT_RENAME; if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) return DIFF_DETECT_COPY; return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; } long parse_algorithm_value(const char *value) { if (!value) return -1; else if (!strcasecmp(value, "myers") || !strcasecmp(value, "default")) return 0; else if (!strcasecmp(value, "minimal")) return XDF_NEED_MINIMAL; else if (!strcasecmp(value, "patience")) return XDF_PATIENCE_DIFF; else if (!strcasecmp(value, "histogram")) return XDF_HISTOGRAM_DIFF; return -1; } /* * These are to give UI layer defaults. * The core-level commands such as git-diff-files should * never be affected by the setting of diff.renames * the user happens to have in the configuration file. */ int git_diff_ui_config(const char *var, const char *value, void *cb) { if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { diff_use_color_default = git_config_colorbool(var, value); return 0; } if (!strcmp(var, "diff.context")) { diff_context_default = git_config_int(var, value); if (diff_context_default < 0) return -1; return 0; } if (!strcmp(var, "diff.renames")) { diff_detect_rename_default = git_config_rename(var, value); return 0; } if (!strcmp(var, "diff.autorefreshindex")) { diff_auto_refresh_index = git_config_bool(var, value); return 0; } if (!strcmp(var, "diff.mnemonicprefix")) { diff_mnemonic_prefix = git_config_bool(var, value); return 0; } if (!strcmp(var, "diff.noprefix")) { diff_no_prefix = git_config_bool(var, value); return 0; } if (!strcmp(var, "diff.statgraphwidth")) { diff_stat_graph_width = git_config_int(var, value); return 0; } if (!strcmp(var, "diff.external")) return git_config_string(&external_diff_cmd_cfg, var, value); if (!strcmp(var, "diff.wordregex")) return git_config_string(&diff_word_regex_cfg, var, value); if (!strcmp(var, "diff.orderfile")) return git_config_pathname(&diff_order_file_cfg, var, value); if (!strcmp(var, "diff.ignoresubmodules")) handle_ignore_submodules_arg(&default_diff_options, value); if (!strcmp(var, "diff.submodule")) { if (parse_submodule_params(&default_diff_options, value)) warning(_("Unknown value for 'diff.submodule' config variable: '%s'"), value); return 0; } if (!strcmp(var, "diff.algorithm")) { diff_algorithm = parse_algorithm_value(value); if (diff_algorithm < 0) return -1; return 0; } if (git_color_config(var, value, cb) < 0) return -1; return git_diff_basic_config(var, value, cb); } int git_diff_basic_config(const char *var, const char *value, void *cb) { if (!strcmp(var, "diff.renamelimit")) { diff_rename_limit_default = git_config_int(var, value); return 0; } if (userdiff_config(var, value) < 0) return -1; if (starts_with(var, "diff.color.") || starts_with(var, "color.diff.")) { int slot = parse_diff_color_slot(var, 11); if (slot < 0) return 0; if (!value) return config_error_nonbool(var); color_parse(value, var, diff_colors[slot]); return 0; } /* like GNU diff's --suppress-blank-empty option */ if (!strcmp(var, "diff.suppressblankempty") || /* for backwards compatibility */ !strcmp(var, "diff.suppress-blank-empty")) { diff_suppress_blank_empty = git_config_bool(var, value); return 0; } if (!strcmp(var, "diff.dirstat")) { struct strbuf errmsg = STRBUF_INIT; default_diff_options.dirstat_permille = diff_dirstat_permille_default; if (parse_dirstat_params(&default_diff_options, value, &errmsg)) warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), errmsg.buf); strbuf_release(&errmsg); diff_dirstat_permille_default = default_diff_options.dirstat_permille; return 0; } if (starts_with(var, "submodule.")) return parse_submodule_config_option(var, value); return git_default_config(var, value, cb); } static char *quote_two(const char *one, const char *two) { int need_one = quote_c_style(one, NULL, NULL, 1); int need_two = quote_c_style(two, NULL, NULL, 1); struct strbuf res = STRBUF_INIT; if (need_one + need_two) { strbuf_addch(&res, '"'); quote_c_style(one, &res, NULL, 1); quote_c_style(two, &res, NULL, 1); strbuf_addch(&res, '"'); } else { strbuf_addstr(&res, one); strbuf_addstr(&res, two); } return strbuf_detach(&res, NULL); } static const char *external_diff(void) { static const char *external_diff_cmd = NULL; static int done_preparing = 0; if (done_preparing) return external_diff_cmd; external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); if (!external_diff_cmd) external_diff_cmd = external_diff_cmd_cfg; done_preparing = 1; return external_diff_cmd; } static struct diff_tempfile { const char *name; /* filename external diff should read from */ char hex[41]; char mode[10]; char tmp_path[PATH_MAX]; } diff_temp[2]; typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); struct emit_callback { int color_diff; unsigned ws_rule; int blank_at_eof_in_preimage; int blank_at_eof_in_postimage; int lno_in_preimage; int lno_in_postimage; sane_truncate_fn truncate; const char **label_path; struct diff_words_data *diff_words; struct diff_options *opt; int *found_changesp; struct strbuf *header; }; static int count_lines(const char *data, int size) { int count, ch, completely_empty = 1, nl_just_seen = 0; count = 0; while (0 < size--) { ch = *data++; if (ch == '\n') { count++; nl_just_seen = 1; completely_empty = 0; } else { nl_just_seen = 0; completely_empty = 0; } } if (completely_empty) return 0; if (!nl_just_seen) count++; /* no trailing newline */ return count; } static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) { if (!DIFF_FILE_VALID(one)) { mf->ptr = (char *)""; /* does not matter */ mf->size = 0; return 0; } else if (diff_populate_filespec(one, 0)) return -1; mf->ptr = one->data; mf->size = one->size; return 0; } /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ static unsigned long diff_filespec_size(struct diff_filespec *one) { if (!DIFF_FILE_VALID(one)) return 0; diff_populate_filespec(one, 1); return one->size; } static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) { char *ptr = mf->ptr; long size = mf->size; int cnt = 0; if (!size) return cnt; ptr += size - 1; /* pointing at the very end */ if (*ptr != '\n') ; /* incomplete line */ else ptr--; /* skip the last LF */ while (mf->ptr < ptr) { char *prev_eol; for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) if (*prev_eol == '\n') break; if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) break; cnt++; ptr = prev_eol - 1; } return cnt; } static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, struct emit_callback *ecbdata) { int l1, l2, at; unsigned ws_rule = ecbdata->ws_rule; l1 = count_trailing_blank(mf1, ws_rule); l2 = count_trailing_blank(mf2, ws_rule); if (l2 <= l1) { ecbdata->blank_at_eof_in_preimage = 0; ecbdata->blank_at_eof_in_postimage = 0; return; } at = count_lines(mf1->ptr, mf1->size); ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; at = count_lines(mf2->ptr, mf2->size); ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; } static void emit_line_0(struct diff_options *o, const char *set, const char *reset, int first, const char *line, int len) { int has_trailing_newline, has_trailing_carriage_return; int nofirst; FILE *file = o->file; fputs(diff_line_prefix(o), file); if (len == 0) { has_trailing_newline = (first == '\n'); has_trailing_carriage_return = (!has_trailing_newline && (first == '\r')); nofirst = has_trailing_newline || has_trailing_carriage_return; } else { has_trailing_newline = (len > 0 && line[len-1] == '\n'); if (has_trailing_newline) len--; has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); if (has_trailing_carriage_return) len--; nofirst = 0; } if (len || !nofirst) { fputs(set, file); if (!nofirst) fputc(first, file); fwrite(line, len, 1, file); fputs(reset, file); } if (has_trailing_carriage_return) fputc('\r', file); if (has_trailing_newline) fputc('\n', file); } static void emit_line(struct diff_options *o, const char *set, const char *reset, const char *line, int len) { emit_line_0(o, set, reset, line[0], line+1, len-1); } static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) { if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && ecbdata->blank_at_eof_in_preimage && ecbdata->blank_at_eof_in_postimage && ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) return 0; return ws_blank_line(line, len, ecbdata->ws_rule); } static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len) { const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); if (!*ws) emit_line_0(ecbdata->opt, set, reset, '+', line, len); else if (new_blank_line_at_eof(ecbdata, line, len)) /* Blank line at EOF - paint '+' as well */ emit_line_0(ecbdata->opt, ws, reset, '+', line, len); else { /* Emit just the prefix, then the rest. */ emit_line_0(ecbdata->opt, set, reset, '+', "", 0); ws_check_emit(line, len, ecbdata->ws_rule, ecbdata->opt->file, set, reset, ws); } } static void emit_hunk_header(struct emit_callback *ecbdata, const char *line, int len) { const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); static const char atat[2] = { '@', '@' }; const char *cp, *ep; struct strbuf msgbuf = STRBUF_INIT; int org_len = len; int i = 1; /* * As a hunk header must begin with "@@ -, + @@", * it always is at least 10 bytes long. */ if (len < 10 || memcmp(line, atat, 2) || !(ep = memmem(line + 2, len - 2, atat, 2))) { emit_line(ecbdata->opt, plain, reset, line, len); return; } ep += 2; /* skip over @@ */ /* The hunk header in fraginfo color */ strbuf_add(&msgbuf, frag, strlen(frag)); strbuf_add(&msgbuf, line, ep - line); strbuf_add(&msgbuf, reset, strlen(reset)); /* * trailing "\r\n" */ for ( ; i < 3; i++) if (line[len - i] == '\r' || line[len - i] == '\n') len--; /* blank before the func header */ for (cp = ep; ep - line < len; ep++) if (*ep != ' ' && *ep != '\t') break; if (ep != cp) { strbuf_add(&msgbuf, plain, strlen(plain)); strbuf_add(&msgbuf, cp, ep - cp); strbuf_add(&msgbuf, reset, strlen(reset)); } if (ep < line + len) { strbuf_add(&msgbuf, func, strlen(func)); strbuf_add(&msgbuf, ep, line + len - ep); strbuf_add(&msgbuf, reset, strlen(reset)); } strbuf_add(&msgbuf, line + len, org_len - len); emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); strbuf_release(&msgbuf); } static struct diff_tempfile *claim_diff_tempfile(void) { int i; for (i = 0; i < ARRAY_SIZE(diff_temp); i++) if (!diff_temp[i].name) return diff_temp + i; die("BUG: diff is failing to clean up its tempfiles"); } static int remove_tempfile_installed; static void remove_tempfile(void) { int i; for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { if (diff_temp[i].name == diff_temp[i].tmp_path) unlink_or_warn(diff_temp[i].name); diff_temp[i].name = NULL; } } static void remove_tempfile_on_signal(int signo) { remove_tempfile(); sigchain_pop(signo); raise(signo); } static void print_line_count(FILE *file, int count) { switch (count) { case 0: fprintf(file, "0,0"); break; case 1: fprintf(file, "1"); break; default: fprintf(file, "1,%d", count); break; } } static void emit_rewrite_lines(struct emit_callback *ecb, int prefix, const char *data, int size) { const char *endp = NULL; static const char *nneof = " No newline at end of file\n"; const char *old = diff_get_color(ecb->color_diff, DIFF_FILE_OLD); const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); while (0 < size) { int len; endp = memchr(data, '\n', size); len = endp ? (endp - data + 1) : size; if (prefix != '+') { ecb->lno_in_preimage++; emit_line_0(ecb->opt, old, reset, '-', data, len); } else { ecb->lno_in_postimage++; emit_add_line(reset, ecb, data, len); } size -= len; data += len; } if (!endp) { const char *plain = diff_get_color(ecb->color_diff, DIFF_PLAIN); putc('\n', ecb->opt->file); emit_line_0(ecb->opt, plain, reset, '\\', nneof, strlen(nneof)); } } static void emit_rewrite_diff(const char *name_a, const char *name_b, struct diff_filespec *one, struct diff_filespec *two, struct userdiff_driver *textconv_one, struct userdiff_driver *textconv_two, struct diff_options *o) { int lc_a, lc_b; const char *name_a_tab, *name_b_tab; const char *metainfo = diff_get_color(o->use_color, DIFF_METAINFO); const char *fraginfo = diff_get_color(o->use_color, DIFF_FRAGINFO); const char *reset = diff_get_color(o->use_color, DIFF_RESET); static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; const char *a_prefix, *b_prefix; char *data_one, *data_two; size_t size_one, size_two; struct emit_callback ecbdata; const char *line_prefix = diff_line_prefix(o); if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { a_prefix = o->b_prefix; b_prefix = o->a_prefix; } else { a_prefix = o->a_prefix; b_prefix = o->b_prefix; } name_a += (*name_a == '/'); name_b += (*name_b == '/'); name_a_tab = strchr(name_a, ' ') ? "\t" : ""; name_b_tab = strchr(name_b, ' ') ? "\t" : ""; strbuf_reset(&a_name); strbuf_reset(&b_name); quote_two_c_style(&a_name, a_prefix, name_a, 0); quote_two_c_style(&b_name, b_prefix, name_b, 0); size_one = fill_textconv(textconv_one, one, &data_one); size_two = fill_textconv(textconv_two, two, &data_two); memset(&ecbdata, 0, sizeof(ecbdata)); ecbdata.color_diff = want_color(o->use_color); ecbdata.found_changesp = &o->found_changes; ecbdata.ws_rule = whitespace_rule(name_b); ecbdata.opt = o; if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { mmfile_t mf1, mf2; mf1.ptr = (char *)data_one; mf2.ptr = (char *)data_two; mf1.size = size_one; mf2.size = size_two; check_blank_at_eof(&mf1, &mf2, &ecbdata); } ecbdata.lno_in_preimage = 1; ecbdata.lno_in_postimage = 1; lc_a = count_lines(data_one, size_one); lc_b = count_lines(data_two, size_two); fprintf(o->file, "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", line_prefix, metainfo, a_name.buf, name_a_tab, reset, line_prefix, metainfo, b_name.buf, name_b_tab, reset, line_prefix, fraginfo); if (!o->irreversible_delete) print_line_count(o->file, lc_a); else fprintf(o->file, "?,?"); fprintf(o->file, " +"); print_line_count(o->file, lc_b); fprintf(o->file, " @@%s\n", reset); if (lc_a && !o->irreversible_delete) emit_rewrite_lines(&ecbdata, '-', data_one, size_one); if (lc_b) emit_rewrite_lines(&ecbdata, '+', data_two, size_two); if (textconv_one) free((char *)data_one); if (textconv_two) free((char *)data_two); } struct diff_words_buffer { mmfile_t text; long alloc; struct diff_words_orig { const char *begin, *end; } *orig; int orig_nr, orig_alloc; }; static void diff_words_append(char *line, unsigned long len, struct diff_words_buffer *buffer) { ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); line++; len--; memcpy(buffer->text.ptr + buffer->text.size, line, len); buffer->text.size += len; buffer->text.ptr[buffer->text.size] = '\0'; } struct diff_words_style_elem { const char *prefix; const char *suffix; const char *color; /* NULL; filled in by the setup code if * color is enabled */ }; struct diff_words_style { enum diff_words_type type; struct diff_words_style_elem new, old, ctx; const char *newline; }; static struct diff_words_style diff_words_styles[] = { { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } }; struct diff_words_data { struct diff_words_buffer minus, plus; const char *current_plus; int last_minus; struct diff_options *opt; regex_t *word_regex; enum diff_words_type type; struct diff_words_style *style; }; static int fn_out_diff_words_write_helper(FILE *fp, struct diff_words_style_elem *st_el, const char *newline, size_t count, const char *buf, const char *line_prefix) { int print = 0; while (count) { char *p = memchr(buf, '\n', count); if (print) fputs(line_prefix, fp); if (p != buf) { if (st_el->color && fputs(st_el->color, fp) < 0) return -1; if (fputs(st_el->prefix, fp) < 0 || fwrite(buf, p ? p - buf : count, 1, fp) != 1 || fputs(st_el->suffix, fp) < 0) return -1; if (st_el->color && *st_el->color && fputs(GIT_COLOR_RESET, fp) < 0) return -1; } if (!p) return 0; if (fputs(newline, fp) < 0) return -1; count -= p + 1 - buf; buf = p + 1; print = 1; } return 0; } /* * '--color-words' algorithm can be described as: * * 1. collect a the minus/plus lines of a diff hunk, divided into * minus-lines and plus-lines; * * 2. break both minus-lines and plus-lines into words and * place them into two mmfile_t with one word for each line; * * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; * * And for the common parts of the both file, we output the plus side text. * diff_words->current_plus is used to trace the current position of the plus file * which printed. diff_words->last_minus is used to trace the last minus word * printed. * * For '--graph' to work with '--color-words', we need to output the graph prefix * on each line of color words output. Generally, there are two conditions on * which we should output the prefix. * * 1. diff_words->last_minus == 0 && * diff_words->current_plus == diff_words->plus.text.ptr * * that is: the plus text must start as a new line, and if there is no minus * word printed, a graph prefix must be printed. * * 2. diff_words->current_plus > diff_words->plus.text.ptr && * *(diff_words->current_plus - 1) == '\n' * * that is: a graph prefix must be printed following a '\n' */ static int color_words_output_graph_prefix(struct diff_words_data *diff_words) { if ((diff_words->last_minus == 0 && diff_words->current_plus == diff_words->plus.text.ptr) || (diff_words->current_plus > diff_words->plus.text.ptr && *(diff_words->current_plus - 1) == '\n')) { return 1; } else { return 0; } } static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) { struct diff_words_data *diff_words = priv; struct diff_words_style *style = diff_words->style; int minus_first, minus_len, plus_first, plus_len; const char *minus_begin, *minus_end, *plus_begin, *plus_end; struct diff_options *opt = diff_words->opt; const char *line_prefix; if (line[0] != '@' || parse_hunk_header(line, len, &minus_first, &minus_len, &plus_first, &plus_len)) return; assert(opt); line_prefix = diff_line_prefix(opt); /* POSIX requires that first be decremented by one if len == 0... */ if (minus_len) { minus_begin = diff_words->minus.orig[minus_first].begin; minus_end = diff_words->minus.orig[minus_first + minus_len - 1].end; } else minus_begin = minus_end = diff_words->minus.orig[minus_first].end; if (plus_len) { plus_begin = diff_words->plus.orig[plus_first].begin; plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; } else plus_begin = plus_end = diff_words->plus.orig[plus_first].end; if (color_words_output_graph_prefix(diff_words)) { fputs(line_prefix, diff_words->opt->file); } if (diff_words->current_plus != plus_begin) { fn_out_diff_words_write_helper(diff_words->opt->file, &style->ctx, style->newline, plus_begin - diff_words->current_plus, diff_words->current_plus, line_prefix); if (*(plus_begin - 1) == '\n') fputs(line_prefix, diff_words->opt->file); } if (minus_begin != minus_end) { fn_out_diff_words_write_helper(diff_words->opt->file, &style->old, style->newline, minus_end - minus_begin, minus_begin, line_prefix); } if (plus_begin != plus_end) { fn_out_diff_words_write_helper(diff_words->opt->file, &style->new, style->newline, plus_end - plus_begin, plus_begin, line_prefix); } diff_words->current_plus = plus_end; diff_words->last_minus = minus_first; } /* This function starts looking at *begin, and returns 0 iff a word was found. */ static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, int *begin, int *end) { if (word_regex && *begin < buffer->size) { regmatch_t match[1]; if (!regexec(word_regex, buffer->ptr + *begin, 1, match, 0)) { char *p = memchr(buffer->ptr + *begin + match[0].rm_so, '\n', match[0].rm_eo - match[0].rm_so); *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; *begin += match[0].rm_so; return *begin >= *end; } return -1; } /* find the next word */ while (*begin < buffer->size && isspace(buffer->ptr[*begin])) (*begin)++; if (*begin >= buffer->size) return -1; /* find the end of the word */ *end = *begin + 1; while (*end < buffer->size && !isspace(buffer->ptr[*end])) (*end)++; return 0; } /* * This function splits the words in buffer->text, stores the list with * newline separator into out, and saves the offsets of the original words * in buffer->orig. */ static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, regex_t *word_regex) { int i, j; long alloc = 0; out->size = 0; out->ptr = NULL; /* fake an empty "0th" word */ ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; buffer->orig_nr = 1; for (i = 0; i < buffer->text.size; i++) { if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) return; /* store original boundaries */ ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, buffer->orig_alloc); buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; buffer->orig_nr++; /* store one word */ ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); out->ptr[out->size + j - i] = '\n'; out->size += j - i + 1; i = j - 1; } } /* this executes the word diff on the accumulated buffers */ static void diff_words_show(struct diff_words_data *diff_words) { xpparam_t xpp; xdemitconf_t xecfg; mmfile_t minus, plus; struct diff_words_style *style = diff_words->style; struct diff_options *opt = diff_words->opt; const char *line_prefix; assert(opt); line_prefix = diff_line_prefix(opt); /* special case: only removal */ if (!diff_words->plus.text.size) { fputs(line_prefix, diff_words->opt->file); fn_out_diff_words_write_helper(diff_words->opt->file, &style->old, style->newline, diff_words->minus.text.size, diff_words->minus.text.ptr, line_prefix); diff_words->minus.text.size = 0; return; } diff_words->current_plus = diff_words->plus.text.ptr; diff_words->last_minus = 0; memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); xpp.flags = 0; /* as only the hunk header will be parsed, we need a 0-context */ xecfg.ctxlen = 0; xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, &xpp, &xecfg); free(minus.ptr); free(plus.ptr); if (diff_words->current_plus != diff_words->plus.text.ptr + diff_words->plus.text.size) { if (color_words_output_graph_prefix(diff_words)) fputs(line_prefix, diff_words->opt->file); fn_out_diff_words_write_helper(diff_words->opt->file, &style->ctx, style->newline, diff_words->plus.text.ptr + diff_words->plus.text.size - diff_words->current_plus, diff_words->current_plus, line_prefix); } diff_words->minus.text.size = diff_words->plus.text.size = 0; } /* In "color-words" mode, show word-diff of words accumulated in the buffer */ static void diff_words_flush(struct emit_callback *ecbdata) { if (ecbdata->diff_words->minus.text.size || ecbdata->diff_words->plus.text.size) diff_words_show(ecbdata->diff_words); } static void diff_filespec_load_driver(struct diff_filespec *one) { /* Use already-loaded driver */ if (one->driver) return; if (S_ISREG(one->mode)) one->driver = userdiff_find_by_path(one->path); /* Fallback to default settings */ if (!one->driver) one->driver = userdiff_find_by_name("default"); } static const char *userdiff_word_regex(struct diff_filespec *one) { diff_filespec_load_driver(one); return one->driver->word_regex; } static void init_diff_words_data(struct emit_callback *ecbdata, struct diff_options *orig_opts, struct diff_filespec *one, struct diff_filespec *two) { int i; struct diff_options *o = xmalloc(sizeof(struct diff_options)); memcpy(o, orig_opts, sizeof(struct diff_options)); ecbdata->diff_words = xcalloc(1, sizeof(struct diff_words_data)); ecbdata->diff_words->type = o->word_diff; ecbdata->diff_words->opt = o; if (!o->word_regex) o->word_regex = userdiff_word_regex(one); if (!o->word_regex) o->word_regex = userdiff_word_regex(two); if (!o->word_regex) o->word_regex = diff_word_regex_cfg; if (o->word_regex) { ecbdata->diff_words->word_regex = (regex_t *) xmalloc(sizeof(regex_t)); if (regcomp(ecbdata->diff_words->word_regex, o->word_regex, REG_EXTENDED | REG_NEWLINE)) die ("Invalid regular expression: %s", o->word_regex); } for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { if (o->word_diff == diff_words_styles[i].type) { ecbdata->diff_words->style = &diff_words_styles[i]; break; } } if (want_color(o->use_color)) { struct diff_words_style *st = ecbdata->diff_words->style; st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN); } } static void free_diff_words_data(struct emit_callback *ecbdata) { if (ecbdata->diff_words) { diff_words_flush(ecbdata); free (ecbdata->diff_words->opt); free (ecbdata->diff_words->minus.text.ptr); free (ecbdata->diff_words->minus.orig); free (ecbdata->diff_words->plus.text.ptr); free (ecbdata->diff_words->plus.orig); if (ecbdata->diff_words->word_regex) { regfree(ecbdata->diff_words->word_regex); free(ecbdata->diff_words->word_regex); } free(ecbdata->diff_words); ecbdata->diff_words = NULL; } } const char *diff_get_color(int diff_use_color, enum color_diff ix) { if (want_color(diff_use_color)) return diff_colors[ix]; return ""; } const char *diff_line_prefix(struct diff_options *opt) { struct strbuf *msgbuf; if (!opt->output_prefix) return ""; msgbuf = opt->output_prefix(opt, opt->output_prefix_data); return msgbuf->buf; } static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) { const char *cp; unsigned long allot; size_t l = len; if (ecb->truncate) return ecb->truncate(line, len); cp = line; allot = l; while (0 < l) { (void) utf8_width(&cp, &l); if (!cp) break; /* truncated in the middle? */ } return allot - l; } static void find_lno(const char *line, struct emit_callback *ecbdata) { const char *p; ecbdata->lno_in_preimage = 0; ecbdata->lno_in_postimage = 0; p = strchr(line, '-'); if (!p) return; /* cannot happen */ ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); p = strchr(p, '+'); if (!p) return; /* cannot happen */ ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); } static void fn_out_consume(void *priv, char *line, unsigned long len) { struct emit_callback *ecbdata = priv; const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); struct diff_options *o = ecbdata->opt; const char *line_prefix = diff_line_prefix(o); if (ecbdata->header) { fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); strbuf_reset(ecbdata->header); ecbdata->header = NULL; } *(ecbdata->found_changesp) = 1; if (ecbdata->label_path[0]) { const char *name_a_tab, *name_b_tab; name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; fprintf(ecbdata->opt->file, "%s%s--- %s%s%s\n", line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); fprintf(ecbdata->opt->file, "%s%s+++ %s%s%s\n", line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; } if (diff_suppress_blank_empty && len == 2 && line[0] == ' ' && line[1] == '\n') { line[0] = '\n'; len = 1; } if (line[0] == '@') { if (ecbdata->diff_words) diff_words_flush(ecbdata); len = sane_truncate_line(ecbdata, line, len); find_lno(line, ecbdata); emit_hunk_header(ecbdata, line, len); if (line[len-1] != '\n') putc('\n', ecbdata->opt->file); return; } if (len < 1) { emit_line(ecbdata->opt, reset, reset, line, len); if (ecbdata->diff_words && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) fputs("~\n", ecbdata->opt->file); return; } if (ecbdata->diff_words) { if (line[0] == '-') { diff_words_append(line, len, &ecbdata->diff_words->minus); return; } else if (line[0] == '+') { diff_words_append(line, len, &ecbdata->diff_words->plus); return; } else if (starts_with(line, "\\ ")) { /* * Eat the "no newline at eof" marker as if we * saw a "+" or "-" line with nothing on it, * and return without diff_words_flush() to * defer processing. If this is the end of * preimage, more "+" lines may come after it. */ return; } diff_words_flush(ecbdata); if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { emit_line(ecbdata->opt, plain, reset, line, len); fputs("~\n", ecbdata->opt->file); } else { /* * Skip the prefix character, if any. With * diff_suppress_blank_empty, there may be * none. */ if (line[0] != '\n') { line++; len--; } emit_line(ecbdata->opt, plain, reset, line, len); } return; } if (line[0] != '+') { const char *color = diff_get_color(ecbdata->color_diff, line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN); ecbdata->lno_in_preimage++; if (line[0] == ' ') ecbdata->lno_in_postimage++; emit_line(ecbdata->opt, color, reset, line, len); } else { ecbdata->lno_in_postimage++; emit_add_line(reset, ecbdata, line + 1, len - 1); } } static char *pprint_rename(const char *a, const char *b) { const char *old = a; const char *new = b; struct strbuf name = STRBUF_INIT; int pfx_length, sfx_length; int pfx_adjust_for_slash; int len_a = strlen(a); int len_b = strlen(b); int a_midlen, b_midlen; int qlen_a = quote_c_style(a, NULL, NULL, 0); int qlen_b = quote_c_style(b, NULL, NULL, 0); if (qlen_a || qlen_b) { quote_c_style(a, &name, NULL, 0); strbuf_addstr(&name, " => "); quote_c_style(b, &name, NULL, 0); return strbuf_detach(&name, NULL); } /* Find common prefix */ pfx_length = 0; while (*old && *new && *old == *new) { if (*old == '/') pfx_length = old - a + 1; old++; new++; } /* Find common suffix */ old = a + len_a; new = b + len_b; sfx_length = 0; /* * If there is a common prefix, it must end in a slash. In * that case we let this loop run 1 into the prefix to see the * same slash. * * If there is no common prefix, we cannot do this as it would * underrun the input strings. */ pfx_adjust_for_slash = (pfx_length ? 1 : 0); while (a + pfx_length - pfx_adjust_for_slash <= old && b + pfx_length - pfx_adjust_for_slash <= new && *old == *new) { if (*old == '/') sfx_length = len_a - (old - a); old--; new--; } /* * pfx{mid-a => mid-b}sfx * {pfx-a => pfx-b}sfx * pfx{sfx-a => sfx-b} * name-a => name-b */ a_midlen = len_a - pfx_length - sfx_length; b_midlen = len_b - pfx_length - sfx_length; if (a_midlen < 0) a_midlen = 0; if (b_midlen < 0) b_midlen = 0; strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); if (pfx_length + sfx_length) { strbuf_add(&name, a, pfx_length); strbuf_addch(&name, '{'); } strbuf_add(&name, a + pfx_length, a_midlen); strbuf_addstr(&name, " => "); strbuf_add(&name, b + pfx_length, b_midlen); if (pfx_length + sfx_length) { strbuf_addch(&name, '}'); strbuf_add(&name, a + len_a - sfx_length, sfx_length); } return strbuf_detach(&name, NULL); } struct diffstat_t { int nr; int alloc; struct diffstat_file { char *from_name; char *name; char *print_name; unsigned is_unmerged:1; unsigned is_binary:1; unsigned is_renamed:1; unsigned is_interesting:1; uintmax_t added, deleted; } **files; }; static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, const char *name_a, const char *name_b) { struct diffstat_file *x; x = xcalloc(sizeof (*x), 1); ALLOC_GROW(diffstat->files, diffstat->nr + 1, diffstat->alloc); diffstat->files[diffstat->nr++] = x; if (name_b) { x->from_name = xstrdup(name_a); x->name = xstrdup(name_b); x->is_renamed = 1; } else { x->from_name = NULL; x->name = xstrdup(name_a); } return x; } static void diffstat_consume(void *priv, char *line, unsigned long len) { struct diffstat_t *diffstat = priv; struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; if (line[0] == '+') x->added++; else if (line[0] == '-') x->deleted++; } const char mime_boundary_leader[] = "------------"; static int scale_linear(int it, int width, int max_change) { if (!it) return 0; /* * make sure that at least one '-' or '+' is printed if * there is any change to this path. The easiest way is to * scale linearly as if the alloted width is one column shorter * than it is, and then add 1 to the result. */ return 1 + (it * (width - 1) / max_change); } static void show_name(FILE *file, const char *prefix, const char *name, int len) { fprintf(file, " %s%-*s |", prefix, len, name); } static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) { if (cnt <= 0) return; fprintf(file, "%s", set); while (cnt--) putc(ch, file); fprintf(file, "%s", reset); } static void fill_print_name(struct diffstat_file *file) { char *pname; if (file->print_name) return; if (!file->is_renamed) { struct strbuf buf = STRBUF_INIT; if (quote_c_style(file->name, &buf, NULL, 0)) { pname = strbuf_detach(&buf, NULL); } else { pname = file->name; strbuf_release(&buf); } } else { pname = pprint_rename(file->from_name, file->name); } file->print_name = pname; } int print_stat_summary(FILE *fp, int files, int insertions, int deletions) { struct strbuf sb = STRBUF_INIT; int ret; if (!files) { assert(insertions == 0 && deletions == 0); return fprintf(fp, "%s\n", " 0 files changed"); } strbuf_addf(&sb, (files == 1) ? " %d file changed" : " %d files changed", files); /* * For binary diff, the caller may want to print "x files * changed" with insertions == 0 && deletions == 0. * * Not omitting "0 insertions(+), 0 deletions(-)" in this case * is probably less confusing (i.e skip over "2 files changed * but nothing about added/removed lines? Is this a bug in Git?"). */ if (insertions || deletions == 0) { strbuf_addf(&sb, (insertions == 1) ? ", %d insertion(+)" : ", %d insertions(+)", insertions); } if (deletions || insertions == 0) { strbuf_addf(&sb, (deletions == 1) ? ", %d deletion(-)" : ", %d deletions(-)", deletions); } strbuf_addch(&sb, '\n'); ret = fputs(sb.buf, fp); strbuf_release(&sb); return ret; } static void show_stats(struct diffstat_t *data, struct diff_options *options) { int i, len, add, del, adds = 0, dels = 0; uintmax_t max_change = 0, max_len = 0; int total_files = data->nr, count; int width, name_width, graph_width, number_width = 0, bin_width = 0; const char *reset, *add_c, *del_c; const char *line_prefix = ""; int extra_shown = 0; if (data->nr == 0) return; line_prefix = diff_line_prefix(options); count = options->stat_count ? options->stat_count : data->nr; reset = diff_get_color_opt(options, DIFF_RESET); add_c = diff_get_color_opt(options, DIFF_FILE_NEW); del_c = diff_get_color_opt(options, DIFF_FILE_OLD); /* * Find the longest filename and max number of changes */ for (i = 0; (i < count) && (i < data->nr); i++) { struct diffstat_file *file = data->files[i]; uintmax_t change = file->added + file->deleted; if (!file->is_interesting && (change == 0)) { count++; /* not shown == room for one more */ continue; } fill_print_name(file); len = strlen(file->print_name); if (max_len < len) max_len = len; if (file->is_unmerged) { /* "Unmerged" is 8 characters */ bin_width = bin_width < 8 ? 8 : bin_width; continue; } if (file->is_binary) { /* "Bin XXX -> YYY bytes" */ int w = 14 + decimal_width(file->added) + decimal_width(file->deleted); bin_width = bin_width < w ? w : bin_width; /* Display change counts aligned with "Bin" */ number_width = 3; continue; } if (max_change < change) max_change = change; } count = i; /* where we can stop scanning in data->files[] */ /* * We have width = stat_width or term_columns() columns total. * We want a maximum of min(max_len, stat_name_width) for the name part. * We want a maximum of min(max_change, stat_graph_width) for the +- part. * We also need 1 for " " and 4 + decimal_width(max_change) * for " | NNNN " and one the empty column at the end, altogether * 6 + decimal_width(max_change). * * If there's not enough space, we will use the smaller of * stat_name_width (if set) and 5/8*width for the filename, * and the rest for constant elements + graph part, but no more * than stat_graph_width for the graph part. * (5/8 gives 50 for filename and 30 for the constant parts + graph * for the standard terminal size). * * In other words: stat_width limits the maximum width, and * stat_name_width fixes the maximum width of the filename, * and is also used to divide available columns if there * aren't enough. * * Binary files are displayed with "Bin XXX -> YYY bytes" * instead of the change count and graph. This part is treated * similarly to the graph part, except that it is not * "scaled". If total width is too small to accommodate the * guaranteed minimum width of the filename part and the * separators and this message, this message will "overflow" * making the line longer than the maximum width. */ if (options->stat_width == -1) width = term_columns() - options->output_prefix_length; else width = options->stat_width ? options->stat_width : 80; number_width = decimal_width(max_change) > number_width ? decimal_width(max_change) : number_width; if (options->stat_graph_width == -1) options->stat_graph_width = diff_stat_graph_width; /* * Guarantee 3/8*16==6 for the graph part * and 5/8*16==10 for the filename part */ if (width < 16 + 6 + number_width) width = 16 + 6 + number_width; /* * First assign sizes that are wanted, ignoring available width. * strlen("Bin XXX -> YYY bytes") == bin_width, and the part * starting from "XXX" should fit in graph_width. */ graph_width = max_change + 4 > bin_width ? max_change : bin_width - 4; if (options->stat_graph_width && options->stat_graph_width < graph_width) graph_width = options->stat_graph_width; name_width = (options->stat_name_width > 0 && options->stat_name_width < max_len) ? options->stat_name_width : max_len; /* * Adjust adjustable widths not to exceed maximum width */ if (name_width + number_width + 6 + graph_width > width) { if (graph_width > width * 3/8 - number_width - 6) { graph_width = width * 3/8 - number_width - 6; if (graph_width < 6) graph_width = 6; } if (options->stat_graph_width && graph_width > options->stat_graph_width) graph_width = options->stat_graph_width; if (name_width > width - number_width - 6 - graph_width) name_width = width - number_width - 6 - graph_width; else graph_width = width - number_width - 6 - name_width; } /* * From here name_width is the width of the name area, * and graph_width is the width of the graph area. * max_change is used to scale graph properly. */ for (i = 0; i < count; i++) { const char *prefix = ""; struct diffstat_file *file = data->files[i]; char *name = file->print_name; uintmax_t added = file->added; uintmax_t deleted = file->deleted; int name_len; if (!file->is_interesting && (added + deleted == 0)) continue; /* * "scale" the filename */ len = name_width; name_len = strlen(name); if (name_width < name_len) { char *slash; prefix = "..."; len -= 3; name += name_len - len; slash = strchr(name, '/'); if (slash) name = slash; } if (file->is_binary) { fprintf(options->file, "%s", line_prefix); show_name(options->file, prefix, name, len); fprintf(options->file, " %*s", number_width, "Bin"); if (!added && !deleted) { putc('\n', options->file); continue; } fprintf(options->file, " %s%"PRIuMAX"%s", del_c, deleted, reset); fprintf(options->file, " -> "); fprintf(options->file, "%s%"PRIuMAX"%s", add_c, added, reset); fprintf(options->file, " bytes"); fprintf(options->file, "\n"); continue; } else if (file->is_unmerged) { fprintf(options->file, "%s", line_prefix); show_name(options->file, prefix, name, len); fprintf(options->file, " Unmerged\n"); continue; } /* * scale the add/delete */ add = added; del = deleted; if (graph_width <= max_change) { int total = scale_linear(add + del, graph_width, max_change); if (total < 2 && add && del) /* width >= 2 due to the sanity check */ total = 2; if (add < del) { add = scale_linear(add, graph_width, max_change); del = total - add; } else { del = scale_linear(del, graph_width, max_change); add = total - del; } } fprintf(options->file, "%s", line_prefix); show_name(options->file, prefix, name, len); fprintf(options->file, " %*"PRIuMAX"%s", number_width, added + deleted, added + deleted ? " " : ""); show_graph(options->file, '+', add, add_c, reset); show_graph(options->file, '-', del, del_c, reset); fprintf(options->file, "\n"); } for (i = 0; i < data->nr; i++) { struct diffstat_file *file = data->files[i]; uintmax_t added = file->added; uintmax_t deleted = file->deleted; if (file->is_unmerged || (!file->is_interesting && (added + deleted == 0))) { total_files--; continue; } if (!file->is_binary) { adds += added; dels += deleted; } if (i < count) continue; if (!extra_shown) fprintf(options->file, "%s ...\n", line_prefix); extra_shown = 1; } fprintf(options->file, "%s", line_prefix); print_stat_summary(options->file, total_files, adds, dels); } static void show_shortstats(struct diffstat_t *data, struct diff_options *options) { int i, adds = 0, dels = 0, total_files = data->nr; if (data->nr == 0) return; for (i = 0; i < data->nr; i++) { int added = data->files[i]->added; int deleted= data->files[i]->deleted; if (data->files[i]->is_unmerged || (!data->files[i]->is_interesting && (added + deleted == 0))) { total_files--; } else if (!data->files[i]->is_binary) { /* don't count bytes */ adds += added; dels += deleted; } } fprintf(options->file, "%s", diff_line_prefix(options)); print_stat_summary(options->file, total_files, adds, dels); } static void show_numstat(struct diffstat_t *data, struct diff_options *options) { int i; if (data->nr == 0) return; for (i = 0; i < data->nr; i++) { struct diffstat_file *file = data->files[i]; fprintf(options->file, "%s", diff_line_prefix(options)); if (file->is_binary) fprintf(options->file, "-\t-\t"); else fprintf(options->file, "%"PRIuMAX"\t%"PRIuMAX"\t", file->added, file->deleted); if (options->line_termination) { fill_print_name(file); if (!file->is_renamed) write_name_quoted(file->name, options->file, options->line_termination); else { fputs(file->print_name, options->file); putc(options->line_termination, options->file); } } else { if (file->is_renamed) { putc('\0', options->file); write_name_quoted(file->from_name, options->file, '\0'); } write_name_quoted(file->name, options->file, '\0'); } } } struct dirstat_file { const char *name; unsigned long changed; }; struct dirstat_dir { struct dirstat_file *files; int alloc, nr, permille, cumulative; }; static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, unsigned long changed, const char *base, int baselen) { unsigned long this_dir = 0; unsigned int sources = 0; const char *line_prefix = diff_line_prefix(opt); while (dir->nr) { struct dirstat_file *f = dir->files; int namelen = strlen(f->name); unsigned long this; char *slash; if (namelen < baselen) break; if (memcmp(f->name, base, baselen)) break; slash = strchr(f->name + baselen, '/'); if (slash) { int newbaselen = slash + 1 - f->name; this = gather_dirstat(opt, dir, changed, f->name, newbaselen); sources++; } else { this = f->changed; dir->files++; dir->nr--; sources += 2; } this_dir += this; } /* * We don't report dirstat's for * - the top level * - or cases where everything came from a single directory * under this directory (sources == 1). */ if (baselen && sources != 1) { if (this_dir) { int permille = this_dir * 1000 / changed; if (permille >= dir->permille) { fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, permille / 10, permille % 10, baselen, base); if (!dir->cumulative) return 0; } } } return this_dir; } static int dirstat_compare(const void *_a, const void *_b) { const struct dirstat_file *a = _a; const struct dirstat_file *b = _b; return strcmp(a->name, b->name); } static void show_dirstat(struct diff_options *options) { int i; unsigned long changed; struct dirstat_dir dir; struct diff_queue_struct *q = &diff_queued_diff; dir.files = NULL; dir.alloc = 0; dir.nr = 0; dir.permille = options->dirstat_permille; dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); changed = 0; for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; const char *name; unsigned long copied, added, damage; int content_changed; name = p->two->path ? p->two->path : p->one->path; if (p->one->sha1_valid && p->two->sha1_valid) content_changed = hashcmp(p->one->sha1, p->two->sha1); else content_changed = 1; if (!content_changed) { /* * The SHA1 has not changed, so pre-/post-content is * identical. We can therefore skip looking at the * file contents altogether. */ damage = 0; goto found_damage; } if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { /* * In --dirstat-by-file mode, we don't really need to * look at the actual file contents at all. * The fact that the SHA1 changed is enough for us to * add this file to the list of results * (with each file contributing equal damage). */ damage = 1; goto found_damage; } if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { diff_populate_filespec(p->one, 0); diff_populate_filespec(p->two, 0); diffcore_count_changes(p->one, p->two, NULL, NULL, 0, &copied, &added); diff_free_filespec_data(p->one); diff_free_filespec_data(p->two); } else if (DIFF_FILE_VALID(p->one)) { diff_populate_filespec(p->one, 1); copied = added = 0; diff_free_filespec_data(p->one); } else if (DIFF_FILE_VALID(p->two)) { diff_populate_filespec(p->two, 1); copied = 0; added = p->two->size; diff_free_filespec_data(p->two); } else continue; /* * Original minus copied is the removed material, * added is the new material. They are both damages * made to the preimage. * If the resulting damage is zero, we know that * diffcore_count_changes() considers the two entries to * be identical, but since content_changed is true, we * know that there must have been _some_ kind of change, * so we force all entries to have damage > 0. */ damage = (p->one->size - copied) + added; if (!damage) damage = 1; found_damage: ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); dir.files[dir.nr].name = name; dir.files[dir.nr].changed = damage; changed += damage; dir.nr++; } /* This can happen even with many files, if everything was renames */ if (!changed) return; /* Show all directories with more than x% of the changes */ qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); gather_dirstat(options, &dir, changed, "", 0); } static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) { int i; unsigned long changed; struct dirstat_dir dir; if (data->nr == 0) return; dir.files = NULL; dir.alloc = 0; dir.nr = 0; dir.permille = options->dirstat_permille; dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); changed = 0; for (i = 0; i < data->nr; i++) { struct diffstat_file *file = data->files[i]; unsigned long damage = file->added + file->deleted; if (file->is_binary) /* * binary files counts bytes, not lines. Must find some * way to normalize binary bytes vs. textual lines. * The following heuristic assumes that there are 64 * bytes per "line". * This is stupid and ugly, but very cheap... */ damage = (damage + 63) / 64; ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); dir.files[dir.nr].name = file->name; dir.files[dir.nr].changed = damage; changed += damage; dir.nr++; } /* This can happen even with many files, if everything was renames */ if (!changed) return; /* Show all directories with more than x% of the changes */ qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); gather_dirstat(options, &dir, changed, "", 0); } static void free_diffstat_info(struct diffstat_t *diffstat) { int i; for (i = 0; i < diffstat->nr; i++) { struct diffstat_file *f = diffstat->files[i]; if (f->name != f->print_name) free(f->print_name); free(f->name); free(f->from_name); free(f); } free(diffstat->files); } struct checkdiff_t { const char *filename; int lineno; int conflict_marker_size; struct diff_options *o; unsigned ws_rule; unsigned status; }; static int is_conflict_marker(const char *line, int marker_size, unsigned long len) { char firstchar; int cnt; if (len < marker_size + 1) return 0; firstchar = line[0]; switch (firstchar) { case '=': case '>': case '<': case '|': break; default: return 0; } for (cnt = 1; cnt < marker_size; cnt++) if (line[cnt] != firstchar) return 0; /* line[1] thru line[marker_size-1] are same as firstchar */ if (len < marker_size + 1 || !isspace(line[marker_size])) return 0; return 1; } static void checkdiff_consume(void *priv, char *line, unsigned long len) { struct checkdiff_t *data = priv; int marker_size = data->conflict_marker_size; const char *ws = diff_get_color(data->o->use_color, DIFF_WHITESPACE); const char *reset = diff_get_color(data->o->use_color, DIFF_RESET); const char *set = diff_get_color(data->o->use_color, DIFF_FILE_NEW); char *err; const char *line_prefix; assert(data->o); line_prefix = diff_line_prefix(data->o); if (line[0] == '+') { unsigned bad; data->lineno++; if (is_conflict_marker(line + 1, marker_size, len - 1)) { data->status |= 1; fprintf(data->o->file, "%s%s:%d: leftover conflict marker\n", line_prefix, data->filename, data->lineno); } bad = ws_check(line + 1, len - 1, data->ws_rule); if (!bad) return; data->status |= bad; err = whitespace_error_string(bad); fprintf(data->o->file, "%s%s:%d: %s.\n", line_prefix, data->filename, data->lineno, err); free(err); emit_line(data->o, set, reset, line, 1); ws_check_emit(line + 1, len - 1, data->ws_rule, data->o->file, set, reset, ws); } else if (line[0] == ' ') { data->lineno++; } else if (line[0] == '@') { char *plus = strchr(line, '+'); if (plus) data->lineno = strtol(plus, NULL, 10) - 1; else die("invalid diff"); } } static unsigned char *deflate_it(char *data, unsigned long size, unsigned long *result_size) { int bound; unsigned char *deflated; git_zstream stream; memset(&stream, 0, sizeof(stream)); git_deflate_init(&stream, zlib_compression_level); bound = git_deflate_bound(&stream, size); deflated = xmalloc(bound); stream.next_out = deflated; stream.avail_out = bound; stream.next_in = (unsigned char *)data; stream.avail_in = size; while (git_deflate(&stream, Z_FINISH) == Z_OK) ; /* nothing */ git_deflate_end(&stream); *result_size = stream.total_out; return deflated; } static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, const char *prefix) { void *cp; void *delta; void *deflated; void *data; unsigned long orig_size; unsigned long delta_size; unsigned long deflate_size; unsigned long data_size; /* We could do deflated delta, or we could do just deflated two, * whichever is smaller. */ delta = NULL; deflated = deflate_it(two->ptr, two->size, &deflate_size); if (one->size && two->size) { delta = diff_delta(one->ptr, one->size, two->ptr, two->size, &delta_size, deflate_size); if (delta) { void *to_free = delta; orig_size = delta_size; delta = deflate_it(delta, delta_size, &delta_size); free(to_free); } } if (delta && delta_size < deflate_size) { fprintf(file, "%sdelta %lu\n", prefix, orig_size); free(deflated); data = delta; data_size = delta_size; } else { fprintf(file, "%sliteral %lu\n", prefix, two->size); free(delta); data = deflated; data_size = deflate_size; } /* emit data encoded in base85 */ cp = data; while (data_size) { int bytes = (52 < data_size) ? 52 : data_size; char line[70]; data_size -= bytes; if (bytes <= 26) line[0] = bytes + 'A' - 1; else line[0] = bytes - 26 + 'a' - 1; encode_85(line + 1, cp, bytes); cp = (char *) cp + bytes; fprintf(file, "%s", prefix); fputs(line, file); fputc('\n', file); } fprintf(file, "%s\n", prefix); free(data); } static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, const char *prefix) { fprintf(file, "%sGIT binary patch\n", prefix); emit_binary_diff_body(file, one, two, prefix); emit_binary_diff_body(file, two, one, prefix); } int diff_filespec_is_binary(struct diff_filespec *one) { if (one->is_binary == -1) { diff_filespec_load_driver(one); if (one->driver->binary != -1) one->is_binary = one->driver->binary; else { if (!one->data && DIFF_FILE_VALID(one)) diff_populate_filespec(one, 0); if (one->data) one->is_binary = buffer_is_binary(one->data, one->size); if (one->is_binary == -1) one->is_binary = 0; } } return one->is_binary; } static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) { diff_filespec_load_driver(one); return one->driver->funcname.pattern ? &one->driver->funcname : NULL; } void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) { if (!options->a_prefix) options->a_prefix = a; if (!options->b_prefix) options->b_prefix = b; } struct userdiff_driver *get_textconv(struct diff_filespec *one) { if (!DIFF_FILE_VALID(one)) return NULL; diff_filespec_load_driver(one); return userdiff_get_textconv(one->driver); } static void builtin_diff(const char *name_a, const char *name_b, struct diff_filespec *one, struct diff_filespec *two, const char *xfrm_msg, int must_show_header, struct diff_options *o, int complete_rewrite) { mmfile_t mf1, mf2; const char *lbl[2]; char *a_one, *b_two; const char *meta = diff_get_color_opt(o, DIFF_METAINFO); const char *reset = diff_get_color_opt(o, DIFF_RESET); const char *a_prefix, *b_prefix; struct userdiff_driver *textconv_one = NULL; struct userdiff_driver *textconv_two = NULL; struct strbuf header = STRBUF_INIT; const char *line_prefix = diff_line_prefix(o); if (DIFF_OPT_TST(o, SUBMODULE_LOG) && (!one->mode || S_ISGITLINK(one->mode)) && (!two->mode || S_ISGITLINK(two->mode))) { const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); show_submodule_summary(o->file, one->path ? one->path : two->path, line_prefix, one->sha1, two->sha1, two->dirty_submodule, meta, del, add, reset); return; } if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { textconv_one = get_textconv(one); textconv_two = get_textconv(two); } diff_set_mnemonic_prefix(o, "a/", "b/"); if (DIFF_OPT_TST(o, REVERSE_DIFF)) { a_prefix = o->b_prefix; b_prefix = o->a_prefix; } else { a_prefix = o->a_prefix; b_prefix = o->b_prefix; } /* Never use a non-valid filename anywhere if at all possible */ name_a = DIFF_FILE_VALID(one) ? name_a : name_b; name_b = DIFF_FILE_VALID(two) ? name_b : name_a; a_one = quote_two(a_prefix, name_a + (*name_a == '/')); b_two = quote_two(b_prefix, name_b + (*name_b == '/')); lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, meta, a_one, b_two, reset); if (lbl[0][0] == '/') { /* /dev/null */ strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, meta, two->mode, reset); if (xfrm_msg) strbuf_addstr(&header, xfrm_msg); must_show_header = 1; } else if (lbl[1][0] == '/') { strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, meta, one->mode, reset); if (xfrm_msg) strbuf_addstr(&header, xfrm_msg); must_show_header = 1; } else { if (one->mode != two->mode) { strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, meta, one->mode, reset); strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, meta, two->mode, reset); must_show_header = 1; } if (xfrm_msg) strbuf_addstr(&header, xfrm_msg); /* * we do not run diff between different kind * of objects. */ if ((one->mode ^ two->mode) & S_IFMT) goto free_ab_and_return; if (complete_rewrite && (textconv_one || !diff_filespec_is_binary(one)) && (textconv_two || !diff_filespec_is_binary(two))) { fprintf(o->file, "%s", header.buf); strbuf_reset(&header); emit_rewrite_diff(name_a, name_b, one, two, textconv_one, textconv_two, o); o->found_changes = 1; goto free_ab_and_return; } } if (o->irreversible_delete && lbl[1][0] == '/') { fprintf(o->file, "%s", header.buf); strbuf_reset(&header); goto free_ab_and_return; } else if (!DIFF_OPT_TST(o, TEXT) && ( (!textconv_one && diff_filespec_is_binary(one)) || (!textconv_two && diff_filespec_is_binary(two)) )) { if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) die("unable to read files to diff"); /* Quite common confusing case */ if (mf1.size == mf2.size && !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { if (must_show_header) fprintf(o->file, "%s", header.buf); goto free_ab_and_return; } fprintf(o->file, "%s", header.buf); strbuf_reset(&header); if (DIFF_OPT_TST(o, BINARY)) emit_binary_diff(o->file, &mf1, &mf2, line_prefix); else fprintf(o->file, "%sBinary files %s and %s differ\n", line_prefix, lbl[0], lbl[1]); o->found_changes = 1; } else { /* Crazy xdl interfaces.. */ const char *diffopts = getenv("GIT_DIFF_OPTS"); xpparam_t xpp; xdemitconf_t xecfg; struct emit_callback ecbdata; const struct userdiff_funcname *pe; if (must_show_header) { fprintf(o->file, "%s", header.buf); strbuf_reset(&header); } mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); pe = diff_funcname_pattern(one); if (!pe) pe = diff_funcname_pattern(two); memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); memset(&ecbdata, 0, sizeof(ecbdata)); ecbdata.label_path = lbl; ecbdata.color_diff = want_color(o->use_color); ecbdata.found_changesp = &o->found_changes; ecbdata.ws_rule = whitespace_rule(name_b); if (ecbdata.ws_rule & WS_BLANK_AT_EOF) check_blank_at_eof(&mf1, &mf2, &ecbdata); ecbdata.opt = o; ecbdata.header = header.len ? &header : NULL; xpp.flags = o->xdl_opts; xecfg.ctxlen = o->context; xecfg.interhunkctxlen = o->interhunkcontext; xecfg.flags = XDL_EMIT_FUNCNAMES; if (DIFF_OPT_TST(o, FUNCCONTEXT)) xecfg.flags |= XDL_EMIT_FUNCCONTEXT; if (pe) xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); if (!diffopts) ; else if (starts_with(diffopts, "--unified=")) xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); else if (starts_with(diffopts, "-u")) xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); if (o->word_diff) init_diff_words_data(&ecbdata, o, one, two); xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, &xpp, &xecfg); if (o->word_diff) free_diff_words_data(&ecbdata); if (textconv_one) free(mf1.ptr); if (textconv_two) free(mf2.ptr); xdiff_clear_find_func(&xecfg); } free_ab_and_return: strbuf_release(&header); diff_free_filespec_data(one); diff_free_filespec_data(two); free(a_one); free(b_two); return; } static void builtin_diffstat(const char *name_a, const char *name_b, struct diff_filespec *one, struct diff_filespec *two, struct diffstat_t *diffstat, struct diff_options *o, struct diff_filepair *p) { mmfile_t mf1, mf2; struct diffstat_file *data; int same_contents; int complete_rewrite = 0; if (!DIFF_PAIR_UNMERGED(p)) { if (p->status == DIFF_STATUS_MODIFIED && p->score) complete_rewrite = 1; } data = diffstat_add(diffstat, name_a, name_b); data->is_interesting = p->status != DIFF_STATUS_UNKNOWN; if (!one || !two) { data->is_unmerged = 1; return; } same_contents = !hashcmp(one->sha1, two->sha1); if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { data->is_binary = 1; if (same_contents) { data->added = 0; data->deleted = 0; } else { data->added = diff_filespec_size(two); data->deleted = diff_filespec_size(one); } } else if (complete_rewrite) { diff_populate_filespec(one, 0); diff_populate_filespec(two, 0); data->deleted = count_lines(one->data, one->size); data->added = count_lines(two->data, two->size); } else if (!same_contents) { /* Crazy xdl interfaces.. */ xpparam_t xpp; xdemitconf_t xecfg; if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) die("unable to read files to diff"); memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); xpp.flags = o->xdl_opts; xecfg.ctxlen = o->context; xecfg.interhunkctxlen = o->interhunkcontext; xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, &xpp, &xecfg); } diff_free_filespec_data(one); diff_free_filespec_data(two); } static void builtin_checkdiff(const char *name_a, const char *name_b, const char *attr_path, struct diff_filespec *one, struct diff_filespec *two, struct diff_options *o) { mmfile_t mf1, mf2; struct checkdiff_t data; if (!two) return; memset(&data, 0, sizeof(data)); data.filename = name_b ? name_b : name_a; data.lineno = 0; data.o = o; data.ws_rule = whitespace_rule(attr_path); data.conflict_marker_size = ll_merge_marker_size(attr_path); if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) die("unable to read files to diff"); /* * All the other codepaths check both sides, but not checking * the "old" side here is deliberate. We are checking the newly * introduced changes, and as long as the "new" side is text, we * can and should check what it introduces. */ if (diff_filespec_is_binary(two)) goto free_and_return; else { /* Crazy xdl interfaces.. */ xpparam_t xpp; xdemitconf_t xecfg; memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); xecfg.ctxlen = 1; /* at least one context line */ xpp.flags = 0; xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, &xpp, &xecfg); if (data.ws_rule & WS_BLANK_AT_EOF) { struct emit_callback ecbdata; int blank_at_eof; ecbdata.ws_rule = data.ws_rule; check_blank_at_eof(&mf1, &mf2, &ecbdata); blank_at_eof = ecbdata.blank_at_eof_in_postimage; if (blank_at_eof) { static char *err; if (!err) err = whitespace_error_string(WS_BLANK_AT_EOF); fprintf(o->file, "%s:%d: %s.\n", data.filename, blank_at_eof, err); data.status = 1; /* report errors */ } } } free_and_return: diff_free_filespec_data(one); diff_free_filespec_data(two); if (data.status) DIFF_OPT_SET(o, CHECK_FAILED); } struct diff_filespec *alloc_filespec(const char *path) { int namelen = strlen(path); struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); memset(spec, 0, sizeof(*spec)); spec->path = (char *)(spec + 1); memcpy(spec->path, path, namelen+1); spec->count = 1; spec->is_binary = -1; return spec; } void free_filespec(struct diff_filespec *spec) { if (!--spec->count) { diff_free_filespec_data(spec); free(spec); } } void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, int sha1_valid, unsigned short mode) { if (mode) { spec->mode = canon_mode(mode); hashcpy(spec->sha1, sha1); spec->sha1_valid = sha1_valid; } } /* * Given a name and sha1 pair, if the index tells us the file in * the work tree has that object contents, return true, so that * prepare_temp_file() does not have to inflate and extract. */ static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) { const struct cache_entry *ce; struct stat st; int pos, len; /* * We do not read the cache ourselves here, because the * benchmark with my previous version that always reads cache * shows that it makes things worse for diff-tree comparing * two linux-2.6 kernel trees in an already checked out work * tree. This is because most diff-tree comparisons deal with * only a small number of files, while reading the cache is * expensive for a large project, and its cost outweighs the * savings we get by not inflating the object to a temporary * file. Practically, this code only helps when we are used * by diff-cache --cached, which does read the cache before * calling us. */ if (!active_cache) return 0; /* We want to avoid the working directory if our caller * doesn't need the data in a normal file, this system * is rather slow with its stat/open/mmap/close syscalls, * and the object is contained in a pack file. The pack * is probably already open and will be faster to obtain * the data through than the working directory. Loose * objects however would tend to be slower as they need * to be individually opened and inflated. */ if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1)) return 0; len = strlen(name); pos = cache_name_pos(name, len); if (pos < 0) return 0; ce = active_cache[pos]; /* * This is not the sha1 we are looking for, or * unreusable because it is not a regular file. */ if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) return 0; /* * If ce is marked as "assume unchanged", there is no * guarantee that work tree matches what we are looking for. */ if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) return 0; /* * If ce matches the file in the work tree, we can reuse it. */ if (ce_uptodate(ce) || (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) return 1; return 0; } static int diff_populate_gitlink(struct diff_filespec *s, int size_only) { int len; char *data = xmalloc(100), *dirty = ""; /* Are we looking at the work tree? */ if (s->dirty_submodule) dirty = "-dirty"; len = snprintf(data, 100, "Subproject commit %s%s\n", sha1_to_hex(s->sha1), dirty); s->data = data; s->size = len; s->should_free = 1; if (size_only) { s->data = NULL; free(data); } return 0; } /* * While doing rename detection and pickaxe operation, we may need to * grab the data for the blob (or file) for our own in-core comparison. * diff_filespec has data and size fields for this purpose. */ int diff_populate_filespec(struct diff_filespec *s, int size_only) { int err = 0; /* * demote FAIL to WARN to allow inspecting the situation * instead of refusing. */ enum safe_crlf crlf_warn = (safe_crlf == SAFE_CRLF_FAIL ? SAFE_CRLF_WARN : safe_crlf); if (!DIFF_FILE_VALID(s)) die("internal error: asking to populate invalid file."); if (S_ISDIR(s->mode)) return -1; if (s->data) return 0; if (size_only && 0 < s->size) return 0; if (S_ISGITLINK(s->mode)) return diff_populate_gitlink(s, size_only); if (!s->sha1_valid || reuse_worktree_file(s->path, s->sha1, 0)) { struct strbuf buf = STRBUF_INIT; struct stat st; int fd; if (lstat(s->path, &st) < 0) { if (errno == ENOENT) { err_empty: err = -1; empty: s->data = (char *)""; s->size = 0; return err; } } s->size = xsize_t(st.st_size); if (!s->size) goto empty; if (S_ISLNK(st.st_mode)) { struct strbuf sb = STRBUF_INIT; if (strbuf_readlink(&sb, s->path, s->size)) goto err_empty; s->size = sb.len; s->data = strbuf_detach(&sb, NULL); s->should_free = 1; return 0; } if (size_only) return 0; fd = open(s->path, O_RDONLY); if (fd < 0) goto err_empty; s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); close(fd); s->should_munmap = 1; /* * Convert from working tree format to canonical git format */ if (convert_to_git(s->path, s->data, s->size, &buf, crlf_warn)) { size_t size = 0; munmap(s->data, s->size); s->should_munmap = 0; s->data = strbuf_detach(&buf, &size); s->size = size; s->should_free = 1; } } else { enum object_type type; if (size_only) { type = sha1_object_info(s->sha1, &s->size); if (type < 0) die("unable to read %s", sha1_to_hex(s->sha1)); } else { s->data = read_sha1_file(s->sha1, &type, &s->size); if (!s->data) die("unable to read %s", sha1_to_hex(s->sha1)); s->should_free = 1; } } return 0; } void diff_free_filespec_blob(struct diff_filespec *s) { if (s->should_free) free(s->data); else if (s->should_munmap) munmap(s->data, s->size); if (s->should_free || s->should_munmap) { s->should_free = s->should_munmap = 0; s->data = NULL; } } void diff_free_filespec_data(struct diff_filespec *s) { diff_free_filespec_blob(s); free(s->cnt_data); s->cnt_data = NULL; } static void prep_temp_blob(const char *path, struct diff_tempfile *temp, void *blob, unsigned long size, const unsigned char *sha1, int mode) { int fd; struct strbuf buf = STRBUF_INIT; struct strbuf template = STRBUF_INIT; char *path_dup = xstrdup(path); const char *base = basename(path_dup); /* Generate "XXXXXX_basename.ext" */ strbuf_addstr(&template, "XXXXXX_"); strbuf_addstr(&template, base); fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf, strlen(base) + 1); if (fd < 0) die_errno("unable to create temp-file"); if (convert_to_working_tree(path, (const char *)blob, (size_t)size, &buf)) { blob = buf.buf; size = buf.len; } if (write_in_full(fd, blob, size) != size) die_errno("unable to write temp-file"); close(fd); temp->name = temp->tmp_path; strcpy(temp->hex, sha1_to_hex(sha1)); temp->hex[40] = 0; sprintf(temp->mode, "%06o", mode); strbuf_release(&buf); strbuf_release(&template); free(path_dup); } static struct diff_tempfile *prepare_temp_file(const char *name, struct diff_filespec *one) { struct diff_tempfile *temp = claim_diff_tempfile(); if (!DIFF_FILE_VALID(one)) { not_a_valid_file: /* A '-' entry produces this for file-2, and * a '+' entry produces this for file-1. */ temp->name = "/dev/null"; strcpy(temp->hex, "."); strcpy(temp->mode, "."); return temp; } if (!remove_tempfile_installed) { atexit(remove_tempfile); sigchain_push_common(remove_tempfile_on_signal); remove_tempfile_installed = 1; } if (!S_ISGITLINK(one->mode) && (!one->sha1_valid || reuse_worktree_file(name, one->sha1, 1))) { struct stat st; if (lstat(name, &st) < 0) { if (errno == ENOENT) goto not_a_valid_file; die_errno("stat(%s)", name); } if (S_ISLNK(st.st_mode)) { struct strbuf sb = STRBUF_INIT; if (strbuf_readlink(&sb, name, st.st_size) < 0) die_errno("readlink(%s)", name); prep_temp_blob(name, temp, sb.buf, sb.len, (one->sha1_valid ? one->sha1 : null_sha1), (one->sha1_valid ? one->mode : S_IFLNK)); strbuf_release(&sb); } else { /* we can borrow from the file in the work tree */ temp->name = name; if (!one->sha1_valid) strcpy(temp->hex, sha1_to_hex(null_sha1)); else strcpy(temp->hex, sha1_to_hex(one->sha1)); /* Even though we may sometimes borrow the * contents from the work tree, we always want * one->mode. mode is trustworthy even when * !(one->sha1_valid), as long as * DIFF_FILE_VALID(one). */ sprintf(temp->mode, "%06o", one->mode); } return temp; } else { if (diff_populate_filespec(one, 0)) die("cannot read data blob for %s", one->path); prep_temp_blob(name, temp, one->data, one->size, one->sha1, one->mode); } return temp; } /* An external diff command takes: * * diff-cmd name infile1 infile1-sha1 infile1-mode \ * infile2 infile2-sha1 infile2-mode [ rename-to ] * */ static void run_external_diff(const char *pgm, const char *name, const char *other, struct diff_filespec *one, struct diff_filespec *two, const char *xfrm_msg, int complete_rewrite, struct diff_options *o) { struct argv_array argv = ARGV_ARRAY_INIT; int retval; struct diff_queue_struct *q = &diff_queued_diff; const char *env[3] = { NULL }; char env_counter[50]; char env_total[50]; if (one && two) { struct diff_tempfile *temp_one, *temp_two; const char *othername = (other ? other : name); temp_one = prepare_temp_file(name, one); temp_two = prepare_temp_file(othername, two); argv_array_push(&argv, pgm); argv_array_push(&argv, name); argv_array_push(&argv, temp_one->name); argv_array_push(&argv, temp_one->hex); argv_array_push(&argv, temp_one->mode); argv_array_push(&argv, temp_two->name); argv_array_push(&argv, temp_two->hex); argv_array_push(&argv, temp_two->mode); if (other) { argv_array_push(&argv, other); argv_array_push(&argv, xfrm_msg); } } else { argv_array_push(&argv, pgm); argv_array_push(&argv, name); } fflush(NULL); env[0] = env_counter; snprintf(env_counter, sizeof(env_counter), "GIT_DIFF_PATH_COUNTER=%d", ++o->diff_path_counter); env[1] = env_total; snprintf(env_total, sizeof(env_total), "GIT_DIFF_PATH_TOTAL=%d", q->nr); retval = run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env); remove_tempfile(); argv_array_clear(&argv); if (retval) { fprintf(stderr, "external diff died, stopping at %s.\n", name); exit(1); } } static int similarity_index(struct diff_filepair *p) { return p->score * 100 / MAX_SCORE; } static void fill_metainfo(struct strbuf *msg, const char *name, const char *other, struct diff_filespec *one, struct diff_filespec *two, struct diff_options *o, struct diff_filepair *p, int *must_show_header, int use_color) { const char *set = diff_get_color(use_color, DIFF_METAINFO); const char *reset = diff_get_color(use_color, DIFF_RESET); const char *line_prefix = diff_line_prefix(o); *must_show_header = 1; strbuf_init(msg, PATH_MAX * 2 + 300); switch (p->status) { case DIFF_STATUS_COPIED: strbuf_addf(msg, "%s%ssimilarity index %d%%", line_prefix, set, similarity_index(p)); strbuf_addf(msg, "%s\n%s%scopy from ", reset, line_prefix, set); quote_c_style(name, msg, NULL, 0); strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); quote_c_style(other, msg, NULL, 0); strbuf_addf(msg, "%s\n", reset); break; case DIFF_STATUS_RENAMED: strbuf_addf(msg, "%s%ssimilarity index %d%%", line_prefix, set, similarity_index(p)); strbuf_addf(msg, "%s\n%s%srename from ", reset, line_prefix, set); quote_c_style(name, msg, NULL, 0); strbuf_addf(msg, "%s\n%s%srename to ", reset, line_prefix, set); quote_c_style(other, msg, NULL, 0); strbuf_addf(msg, "%s\n", reset); break; case DIFF_STATUS_MODIFIED: if (p->score) { strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", line_prefix, set, similarity_index(p), reset); break; } /* fallthru */ default: *must_show_header = 0; } if (one && two && hashcmp(one->sha1, two->sha1)) { int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; if (DIFF_OPT_TST(o, BINARY)) { mmfile_t mf; if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) abbrev = 40; } strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, find_unique_abbrev(one->sha1, abbrev)); strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev)); if (one->mode == two->mode) strbuf_addf(msg, " %06o", one->mode); strbuf_addf(msg, "%s\n", reset); } } static void run_diff_cmd(const char *pgm, const char *name, const char *other, const char *attr_path, struct diff_filespec *one, struct diff_filespec *two, struct strbuf *msg, struct diff_options *o, struct diff_filepair *p) { const char *xfrm_msg = NULL; int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; int must_show_header = 0; if (DIFF_OPT_TST(o, ALLOW_EXTERNAL)) { struct userdiff_driver *drv = userdiff_find_by_path(attr_path); if (drv && drv->external) pgm = drv->external; } if (msg) { /* * don't use colors when the header is intended for an * external diff driver */ fill_metainfo(msg, name, other, one, two, o, p, &must_show_header, want_color(o->use_color) && !pgm); xfrm_msg = msg->len ? msg->buf : NULL; } if (pgm) { run_external_diff(pgm, name, other, one, two, xfrm_msg, complete_rewrite, o); return; } if (one && two) builtin_diff(name, other ? other : name, one, two, xfrm_msg, must_show_header, o, complete_rewrite); else fprintf(o->file, "* Unmerged path %s\n", name); } static void diff_fill_sha1_info(struct diff_filespec *one) { if (DIFF_FILE_VALID(one)) { if (!one->sha1_valid) { struct stat st; if (one->is_stdin) { hashcpy(one->sha1, null_sha1); return; } if (lstat(one->path, &st) < 0) die_errno("stat '%s'", one->path); if (index_path(one->sha1, one->path, &st, 0)) die("cannot hash %s", one->path); } } else hashclr(one->sha1); } static void strip_prefix(int prefix_length, const char **namep, const char **otherp) { /* Strip the prefix but do not molest /dev/null and absolute paths */ if (*namep && **namep != '/') { *namep += prefix_length; if (**namep == '/') ++*namep; } if (*otherp && **otherp != '/') { *otherp += prefix_length; if (**otherp == '/') ++*otherp; } } static void run_diff(struct diff_filepair *p, struct diff_options *o) { const char *pgm = external_diff(); struct strbuf msg; struct diff_filespec *one = p->one; struct diff_filespec *two = p->two; const char *name; const char *other; const char *attr_path; name = p->one->path; other = (strcmp(name, p->two->path) ? p->two->path : NULL); attr_path = name; if (o->prefix_length) strip_prefix(o->prefix_length, &name, &other); if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) pgm = NULL; if (DIFF_PAIR_UNMERGED(p)) { run_diff_cmd(pgm, name, NULL, attr_path, NULL, NULL, NULL, o, p); return; } diff_fill_sha1_info(one); diff_fill_sha1_info(two); if (!pgm && DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && (S_IFMT & one->mode) != (S_IFMT & two->mode)) { /* * a filepair that changes between file and symlink * needs to be split into deletion and creation. */ struct diff_filespec *null = alloc_filespec(two->path); run_diff_cmd(NULL, name, other, attr_path, one, null, &msg, o, p); free(null); strbuf_release(&msg); null = alloc_filespec(one->path); run_diff_cmd(NULL, name, other, attr_path, null, two, &msg, o, p); free(null); } else run_diff_cmd(pgm, name, other, attr_path, one, two, &msg, o, p); strbuf_release(&msg); } static void run_diffstat(struct diff_filepair *p, struct diff_options *o, struct diffstat_t *diffstat) { const char *name; const char *other; if (DIFF_PAIR_UNMERGED(p)) { /* unmerged */ builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, p); return; } name = p->one->path; other = (strcmp(name, p->two->path) ? p->two->path : NULL); if (o->prefix_length) strip_prefix(o->prefix_length, &name, &other); diff_fill_sha1_info(p->one); diff_fill_sha1_info(p->two); builtin_diffstat(name, other, p->one, p->two, diffstat, o, p); } static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) { const char *name; const char *other; const char *attr_path; if (DIFF_PAIR_UNMERGED(p)) { /* unmerged */ return; } name = p->one->path; other = (strcmp(name, p->two->path) ? p->two->path : NULL); attr_path = other ? other : name; if (o->prefix_length) strip_prefix(o->prefix_length, &name, &other); diff_fill_sha1_info(p->one); diff_fill_sha1_info(p->two); builtin_checkdiff(name, other, attr_path, p->one, p->two, o); } void diff_setup(struct diff_options *options) { memcpy(options, &default_diff_options, sizeof(*options)); options->file = stdout; options->line_termination = '\n'; options->break_opt = -1; options->rename_limit = -1; options->dirstat_permille = diff_dirstat_permille_default; options->context = diff_context_default; DIFF_OPT_SET(options, RENAME_EMPTY); options->change = diff_change; options->add_remove = diff_addremove; options->use_color = diff_use_color_default; options->detect_rename = diff_detect_rename_default; options->xdl_opts |= diff_algorithm; options->orderfile = diff_order_file_cfg; if (diff_no_prefix) { options->a_prefix = options->b_prefix = ""; } else if (!diff_mnemonic_prefix) { options->a_prefix = "a/"; options->b_prefix = "b/"; } } void diff_setup_done(struct diff_options *options) { int count = 0; if (options->set_default) options->set_default(options); if (options->output_format & DIFF_FORMAT_NAME) count++; if (options->output_format & DIFF_FORMAT_NAME_STATUS) count++; if (options->output_format & DIFF_FORMAT_CHECKDIFF) count++; if (options->output_format & DIFF_FORMAT_NO_OUTPUT) count++; if (count > 1) die("--name-only, --name-status, --check and -s are mutually exclusive"); /* * Most of the time we can say "there are changes" * only by checking if there are changed paths, but * --ignore-whitespace* options force us to look * inside contents. */ if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); else DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) options->detect_rename = DIFF_DETECT_COPY; if (!DIFF_OPT_TST(options, RELATIVE_NAME)) options->prefix = NULL; if (options->prefix) options->prefix_length = strlen(options->prefix); else options->prefix_length = 0; if (options->output_format & (DIFF_FORMAT_NAME | DIFF_FORMAT_NAME_STATUS | DIFF_FORMAT_CHECKDIFF | DIFF_FORMAT_NO_OUTPUT)) options->output_format &= ~(DIFF_FORMAT_RAW | DIFF_FORMAT_NUMSTAT | DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_DIRSTAT | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_PATCH); /* * These cases always need recursive; we do not drop caller-supplied * recursive bits for other formats here. */ if (options->output_format & (DIFF_FORMAT_PATCH | DIFF_FORMAT_NUMSTAT | DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_DIRSTAT | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_CHECKDIFF)) DIFF_OPT_SET(options, RECURSIVE); /* * Also pickaxe would not work very well if you do not say recursive */ if (options->pickaxe) DIFF_OPT_SET(options, RECURSIVE); /* * When patches are generated, submodules diffed against the work tree * must be checked for dirtiness too so it can be shown in the output */ if (options->output_format & DIFF_FORMAT_PATCH) DIFF_OPT_SET(options, DIRTY_SUBMODULES); if (options->detect_rename && options->rename_limit < 0) options->rename_limit = diff_rename_limit_default; if (options->setup & DIFF_SETUP_USE_CACHE) { if (!active_cache) /* read-cache does not die even when it fails * so it is safe for us to do this here. Also * it does not smudge active_cache or active_nr * when it fails, so we do not have to worry about * cleaning it up ourselves either. */ read_cache(); } if (options->abbrev <= 0 || 40 < options->abbrev) options->abbrev = 40; /* full */ /* * It does not make sense to show the first hit we happened * to have found. It does not make sense not to return with * exit code in such a case either. */ if (DIFF_OPT_TST(options, QUICK)) { options->output_format = DIFF_FORMAT_NO_OUTPUT; DIFF_OPT_SET(options, EXIT_WITH_STATUS); } options->diff_path_counter = 0; if (DIFF_OPT_TST(options, FOLLOW_RENAMES) && options->pathspec.nr != 1) die(_("--follow requires exactly one pathspec")); } static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) { char c, *eq; int len; if (*arg != '-') return 0; c = *++arg; if (!c) return 0; if (c == arg_short) { c = *++arg; if (!c) return 1; if (val && isdigit(c)) { char *end; int n = strtoul(arg, &end, 10); if (*end) return 0; *val = n; return 1; } return 0; } if (c != '-') return 0; arg++; eq = strchrnul(arg, '='); len = eq - arg; if (!len || strncmp(arg, arg_long, len)) return 0; if (*eq) { int n; char *end; if (!isdigit(*++eq)) return 0; n = strtoul(eq, &end, 10); if (*end) return 0; *val = n; } return 1; } static int diff_scoreopt_parse(const char *opt); static inline int short_opt(char opt, const char **argv, const char **optarg) { const char *arg = argv[0]; if (arg[0] != '-' || arg[1] != opt) return 0; if (arg[2] != '\0') { *optarg = arg + 2; return 1; } if (!argv[1]) die("Option '%c' requires a value", opt); *optarg = argv[1]; return 2; } int parse_long_opt(const char *opt, const char **argv, const char **optarg) { const char *arg = argv[0]; if (arg[0] != '-' || arg[1] != '-') return 0; arg += strlen("--"); if (!starts_with(arg, opt)) return 0; arg += strlen(opt); if (*arg == '=') { /* stuck form: --option=value */ *optarg = arg + 1; return 1; } if (*arg != '\0') return 0; /* separate form: --option value */ if (!argv[1]) die("Option '--%s' requires a value", opt); *optarg = argv[1]; return 2; } static int stat_opt(struct diff_options *options, const char **av) { const char *arg = av[0]; char *end; int width = options->stat_width; int name_width = options->stat_name_width; int graph_width = options->stat_graph_width; int count = options->stat_count; int argcount = 1; arg += strlen("--stat"); end = (char *)arg; switch (*arg) { case '-': if (starts_with(arg, "-width")) { arg += strlen("-width"); if (*arg == '=') width = strtoul(arg + 1, &end, 10); else if (!*arg && !av[1]) die("Option '--stat-width' requires a value"); else if (!*arg) { width = strtoul(av[1], &end, 10); argcount = 2; } } else if (starts_with(arg, "-name-width")) { arg += strlen("-name-width"); if (*arg == '=') name_width = strtoul(arg + 1, &end, 10); else if (!*arg && !av[1]) die("Option '--stat-name-width' requires a value"); else if (!*arg) { name_width = strtoul(av[1], &end, 10); argcount = 2; } } else if (starts_with(arg, "-graph-width")) { arg += strlen("-graph-width"); if (*arg == '=') graph_width = strtoul(arg + 1, &end, 10); else if (!*arg && !av[1]) die("Option '--stat-graph-width' requires a value"); else if (!*arg) { graph_width = strtoul(av[1], &end, 10); argcount = 2; } } else if (starts_with(arg, "-count")) { arg += strlen("-count"); if (*arg == '=') count = strtoul(arg + 1, &end, 10); else if (!*arg && !av[1]) die("Option '--stat-count' requires a value"); else if (!*arg) { count = strtoul(av[1], &end, 10); argcount = 2; } } break; case '=': width = strtoul(arg+1, &end, 10); if (*end == ',') name_width = strtoul(end+1, &end, 10); if (*end == ',') count = strtoul(end+1, &end, 10); } /* Important! This checks all the error cases! */ if (*end) return 0; options->output_format |= DIFF_FORMAT_DIFFSTAT; options->stat_name_width = name_width; options->stat_graph_width = graph_width; options->stat_width = width; options->stat_count = count; return argcount; } static int parse_dirstat_opt(struct diff_options *options, const char *params) { struct strbuf errmsg = STRBUF_INIT; if (parse_dirstat_params(options, params, &errmsg)) die(_("Failed to parse --dirstat/-X option parameter:\n%s"), errmsg.buf); strbuf_release(&errmsg); /* * The caller knows a dirstat-related option is given from the command * line; allow it to say "return this_function();" */ options->output_format |= DIFF_FORMAT_DIRSTAT; return 1; } static int parse_submodule_opt(struct diff_options *options, const char *value) { if (parse_submodule_params(options, value)) die(_("Failed to parse --submodule option parameter: '%s'"), value); return 1; } static const char diff_status_letters[] = { DIFF_STATUS_ADDED, DIFF_STATUS_COPIED, DIFF_STATUS_DELETED, DIFF_STATUS_MODIFIED, DIFF_STATUS_RENAMED, DIFF_STATUS_TYPE_CHANGED, DIFF_STATUS_UNKNOWN, DIFF_STATUS_UNMERGED, DIFF_STATUS_FILTER_AON, DIFF_STATUS_FILTER_BROKEN, '\0', }; static unsigned int filter_bit['Z' + 1]; static void prepare_filter_bits(void) { int i; if (!filter_bit[DIFF_STATUS_ADDED]) { for (i = 0; diff_status_letters[i]; i++) filter_bit[(int) diff_status_letters[i]] = (1 << i); } } static unsigned filter_bit_tst(char status, const struct diff_options *opt) { return opt->filter & filter_bit[(int) status]; } static int parse_diff_filter_opt(const char *optarg, struct diff_options *opt) { int i, optch; prepare_filter_bits(); /* * If there is a negation e.g. 'd' in the input, and we haven't * initialized the filter field with another --diff-filter, start * from full set of bits, except for AON. */ if (!opt->filter) { for (i = 0; (optch = optarg[i]) != '\0'; i++) { if (optch < 'a' || 'z' < optch) continue; opt->filter = (1 << (ARRAY_SIZE(diff_status_letters) - 1)) - 1; opt->filter &= ~filter_bit[DIFF_STATUS_FILTER_AON]; break; } } for (i = 0; (optch = optarg[i]) != '\0'; i++) { unsigned int bit; int negate; if ('a' <= optch && optch <= 'z') { negate = 1; optch = toupper(optch); } else { negate = 0; } bit = (0 <= optch && optch <= 'Z') ? filter_bit[optch] : 0; if (!bit) return optarg[i]; if (negate) opt->filter &= ~bit; else opt->filter |= bit; } return 0; } static void enable_patch_output(int *fmt) { *fmt &= ~DIFF_FORMAT_NO_OUTPUT; *fmt |= DIFF_FORMAT_PATCH; } int diff_opt_parse(struct diff_options *options, const char **av, int ac) { const char *arg = av[0]; const char *optarg; int argcount; /* Output format options */ if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch") || opt_arg(arg, 'U', "unified", &options->context)) enable_patch_output(&options->output_format); else if (!strcmp(arg, "--raw")) options->output_format |= DIFF_FORMAT_RAW; else if (!strcmp(arg, "--patch-with-raw")) { enable_patch_output(&options->output_format); options->output_format |= DIFF_FORMAT_RAW; } else if (!strcmp(arg, "--numstat")) options->output_format |= DIFF_FORMAT_NUMSTAT; else if (!strcmp(arg, "--shortstat")) options->output_format |= DIFF_FORMAT_SHORTSTAT; else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) return parse_dirstat_opt(options, ""); else if (starts_with(arg, "-X")) return parse_dirstat_opt(options, arg + 2); else if (starts_with(arg, "--dirstat=")) return parse_dirstat_opt(options, arg + 10); else if (!strcmp(arg, "--cumulative")) return parse_dirstat_opt(options, "cumulative"); else if (!strcmp(arg, "--dirstat-by-file")) return parse_dirstat_opt(options, "files"); else if (starts_with(arg, "--dirstat-by-file=")) { parse_dirstat_opt(options, "files"); return parse_dirstat_opt(options, arg + 18); } else if (!strcmp(arg, "--check")) options->output_format |= DIFF_FORMAT_CHECKDIFF; else if (!strcmp(arg, "--summary")) options->output_format |= DIFF_FORMAT_SUMMARY; else if (!strcmp(arg, "--patch-with-stat")) { enable_patch_output(&options->output_format); options->output_format |= DIFF_FORMAT_DIFFSTAT; } else if (!strcmp(arg, "--name-only")) options->output_format |= DIFF_FORMAT_NAME; else if (!strcmp(arg, "--name-status")) options->output_format |= DIFF_FORMAT_NAME_STATUS; else if (!strcmp(arg, "-s") || !strcmp(arg, "--no-patch")) options->output_format |= DIFF_FORMAT_NO_OUTPUT; else if (starts_with(arg, "--stat")) /* --stat, --stat-width, --stat-name-width, or --stat-count */ return stat_opt(options, av); /* renames options */ else if (starts_with(arg, "-B") || starts_with(arg, "--break-rewrites=") || !strcmp(arg, "--break-rewrites")) { if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) return error("invalid argument to -B: %s", arg+2); } else if (starts_with(arg, "-M") || starts_with(arg, "--find-renames=") || !strcmp(arg, "--find-renames")) { if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) return error("invalid argument to -M: %s", arg+2); options->detect_rename = DIFF_DETECT_RENAME; } else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { options->irreversible_delete = 1; } else if (starts_with(arg, "-C") || starts_with(arg, "--find-copies=") || !strcmp(arg, "--find-copies")) { if (options->detect_rename == DIFF_DETECT_COPY) DIFF_OPT_SET(options, FIND_COPIES_HARDER); if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) return error("invalid argument to -C: %s", arg+2); options->detect_rename = DIFF_DETECT_COPY; } else if (!strcmp(arg, "--no-renames")) options->detect_rename = 0; else if (!strcmp(arg, "--rename-empty")) DIFF_OPT_SET(options, RENAME_EMPTY); else if (!strcmp(arg, "--no-rename-empty")) DIFF_OPT_CLR(options, RENAME_EMPTY); else if (!strcmp(arg, "--relative")) DIFF_OPT_SET(options, RELATIVE_NAME); else if (starts_with(arg, "--relative=")) { DIFF_OPT_SET(options, RELATIVE_NAME); options->prefix = arg + 11; } /* xdiff options */ else if (!strcmp(arg, "--minimal")) DIFF_XDL_SET(options, NEED_MINIMAL); else if (!strcmp(arg, "--no-minimal")) DIFF_XDL_CLR(options, NEED_MINIMAL); else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) DIFF_XDL_SET(options, IGNORE_WHITESPACE); else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); else if (!strcmp(arg, "--ignore-space-at-eol")) DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); else if (!strcmp(arg, "--ignore-blank-lines")) DIFF_XDL_SET(options, IGNORE_BLANK_LINES); else if (!strcmp(arg, "--patience")) options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); else if (!strcmp(arg, "--histogram")) options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF); else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) { long value = parse_algorithm_value(optarg); if (value < 0) return error("option diff-algorithm accepts \"myers\", " "\"minimal\", \"patience\" and \"histogram\""); /* clear out previous settings */ DIFF_XDL_CLR(options, NEED_MINIMAL); options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK; options->xdl_opts |= value; return argcount; } /* flags options */ else if (!strcmp(arg, "--binary")) { enable_patch_output(&options->output_format); DIFF_OPT_SET(options, BINARY); } else if (!strcmp(arg, "--full-index")) DIFF_OPT_SET(options, FULL_INDEX); else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) DIFF_OPT_SET(options, TEXT); else if (!strcmp(arg, "-R")) DIFF_OPT_SET(options, REVERSE_DIFF); else if (!strcmp(arg, "--find-copies-harder")) DIFF_OPT_SET(options, FIND_COPIES_HARDER); else if (!strcmp(arg, "--follow")) DIFF_OPT_SET(options, FOLLOW_RENAMES); else if (!strcmp(arg, "--no-follow")) DIFF_OPT_CLR(options, FOLLOW_RENAMES); else if (!strcmp(arg, "--color")) options->use_color = 1; else if (starts_with(arg, "--color=")) { int value = git_config_colorbool(NULL, arg+8); if (value < 0) return error("option `color' expects \"always\", \"auto\", or \"never\""); options->use_color = value; } else if (!strcmp(arg, "--no-color")) options->use_color = 0; else if (!strcmp(arg, "--color-words")) { options->use_color = 1; options->word_diff = DIFF_WORDS_COLOR; } else if (starts_with(arg, "--color-words=")) { options->use_color = 1; options->word_diff = DIFF_WORDS_COLOR; options->word_regex = arg + 14; } else if (!strcmp(arg, "--word-diff")) { if (options->word_diff == DIFF_WORDS_NONE) options->word_diff = DIFF_WORDS_PLAIN; } else if (starts_with(arg, "--word-diff=")) { const char *type = arg + 12; if (!strcmp(type, "plain")) options->word_diff = DIFF_WORDS_PLAIN; else if (!strcmp(type, "color")) { options->use_color = 1; options->word_diff = DIFF_WORDS_COLOR; } else if (!strcmp(type, "porcelain")) options->word_diff = DIFF_WORDS_PORCELAIN; else if (!strcmp(type, "none")) options->word_diff = DIFF_WORDS_NONE; else die("bad --word-diff argument: %s", type); } else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { if (options->word_diff == DIFF_WORDS_NONE) options->word_diff = DIFF_WORDS_PLAIN; options->word_regex = optarg; return argcount; } else if (!strcmp(arg, "--exit-code")) DIFF_OPT_SET(options, EXIT_WITH_STATUS); else if (!strcmp(arg, "--quiet")) DIFF_OPT_SET(options, QUICK); else if (!strcmp(arg, "--ext-diff")) DIFF_OPT_SET(options, ALLOW_EXTERNAL); else if (!strcmp(arg, "--no-ext-diff")) DIFF_OPT_CLR(options, ALLOW_EXTERNAL); else if (!strcmp(arg, "--textconv")) DIFF_OPT_SET(options, ALLOW_TEXTCONV); else if (!strcmp(arg, "--no-textconv")) DIFF_OPT_CLR(options, ALLOW_TEXTCONV); else if (!strcmp(arg, "--ignore-submodules")) { DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); handle_ignore_submodules_arg(options, "all"); } else if (starts_with(arg, "--ignore-submodules=")) { DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); handle_ignore_submodules_arg(options, arg + 20); } else if (!strcmp(arg, "--submodule")) DIFF_OPT_SET(options, SUBMODULE_LOG); else if (starts_with(arg, "--submodule=")) return parse_submodule_opt(options, arg + 12); /* misc options */ else if (!strcmp(arg, "-z")) options->line_termination = 0; else if ((argcount = short_opt('l', av, &optarg))) { options->rename_limit = strtoul(optarg, NULL, 10); return argcount; } else if ((argcount = short_opt('S', av, &optarg))) { options->pickaxe = optarg; options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; return argcount; } else if ((argcount = short_opt('G', av, &optarg))) { options->pickaxe = optarg; options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; return argcount; } else if (!strcmp(arg, "--pickaxe-all")) options->pickaxe_opts |= DIFF_PICKAXE_ALL; else if (!strcmp(arg, "--pickaxe-regex")) options->pickaxe_opts |= DIFF_PICKAXE_REGEX; else if ((argcount = short_opt('O', av, &optarg))) { options->orderfile = optarg; return argcount; } else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { int offending = parse_diff_filter_opt(optarg, options); if (offending) die("unknown change class '%c' in --diff-filter=%s", offending, optarg); return argcount; } else if (!strcmp(arg, "--abbrev")) options->abbrev = DEFAULT_ABBREV; else if (starts_with(arg, "--abbrev=")) { options->abbrev = strtoul(arg + 9, NULL, 10); if (options->abbrev < MINIMUM_ABBREV) options->abbrev = MINIMUM_ABBREV; else if (40 < options->abbrev) options->abbrev = 40; } else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { options->a_prefix = optarg; return argcount; } else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { options->b_prefix = optarg; return argcount; } else if (!strcmp(arg, "--no-prefix")) options->a_prefix = options->b_prefix = ""; else if (opt_arg(arg, '\0', "inter-hunk-context", &options->interhunkcontext)) ; else if (!strcmp(arg, "-W")) DIFF_OPT_SET(options, FUNCCONTEXT); else if (!strcmp(arg, "--function-context")) DIFF_OPT_SET(options, FUNCCONTEXT); else if (!strcmp(arg, "--no-function-context")) DIFF_OPT_CLR(options, FUNCCONTEXT); else if ((argcount = parse_long_opt("output", av, &optarg))) { options->file = fopen(optarg, "w"); if (!options->file) die_errno("Could not open '%s'", optarg); options->close_file = 1; return argcount; } else return 0; return 1; } int parse_rename_score(const char **cp_p) { unsigned long num, scale; int ch, dot; const char *cp = *cp_p; num = 0; scale = 1; dot = 0; for (;;) { ch = *cp; if ( !dot && ch == '.' ) { scale = 1; dot = 1; } else if ( ch == '%' ) { scale = dot ? scale*100 : 100; cp++; /* % is always at the end */ break; } else if ( ch >= '0' && ch <= '9' ) { if ( scale < 100000 ) { scale *= 10; num = (num*10) + (ch-'0'); } } else { break; } cp++; } *cp_p = cp; /* user says num divided by scale and we say internally that * is MAX_SCORE * num / scale. */ return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); } static int diff_scoreopt_parse(const char *opt) { int opt1, opt2, cmd; if (*opt++ != '-') return -1; cmd = *opt++; if (cmd == '-') { /* convert the long-form arguments into short-form versions */ if (starts_with(opt, "break-rewrites")) { opt += strlen("break-rewrites"); if (*opt == 0 || *opt++ == '=') cmd = 'B'; } else if (starts_with(opt, "find-copies")) { opt += strlen("find-copies"); if (*opt == 0 || *opt++ == '=') cmd = 'C'; } else if (starts_with(opt, "find-renames")) { opt += strlen("find-renames"); if (*opt == 0 || *opt++ == '=') cmd = 'M'; } } if (cmd != 'M' && cmd != 'C' && cmd != 'B') return -1; /* that is not a -M, -C, or -B option */ opt1 = parse_rename_score(&opt); if (cmd != 'B') opt2 = 0; else { if (*opt == 0) opt2 = 0; else if (*opt != '/') return -1; /* we expect -B80/99 or -B80 */ else { opt++; opt2 = parse_rename_score(&opt); } } if (*opt != 0) return -1; return opt1 | (opt2 << 16); } struct diff_queue_struct diff_queued_diff; void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) { ALLOC_GROW(queue->queue, queue->nr + 1, queue->alloc); queue->queue[queue->nr++] = dp; } struct diff_filepair *diff_queue(struct diff_queue_struct *queue, struct diff_filespec *one, struct diff_filespec *two) { struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); dp->one = one; dp->two = two; if (queue) diff_q(queue, dp); return dp; } void diff_free_filepair(struct diff_filepair *p) { free_filespec(p->one); free_filespec(p->two); free(p); } /* This is different from find_unique_abbrev() in that * it stuffs the result with dots for alignment. */ const char *diff_unique_abbrev(const unsigned char *sha1, int len) { int abblen; const char *abbrev; if (len == 40) return sha1_to_hex(sha1); abbrev = find_unique_abbrev(sha1, len); abblen = strlen(abbrev); if (abblen < 37) { static char hex[41]; if (len < abblen && abblen <= len + 2) sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); else sprintf(hex, "%s...", abbrev); return hex; } return sha1_to_hex(sha1); } static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) { int line_termination = opt->line_termination; int inter_name_termination = line_termination ? '\t' : '\0'; fprintf(opt->file, "%s", diff_line_prefix(opt)); if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, diff_unique_abbrev(p->one->sha1, opt->abbrev)); fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); } if (p->score) { fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), inter_name_termination); } else { fprintf(opt->file, "%c%c", p->status, inter_name_termination); } if (p->status == DIFF_STATUS_COPIED || p->status == DIFF_STATUS_RENAMED) { const char *name_a, *name_b; name_a = p->one->path; name_b = p->two->path; strip_prefix(opt->prefix_length, &name_a, &name_b); write_name_quoted(name_a, opt->file, inter_name_termination); write_name_quoted(name_b, opt->file, line_termination); } else { const char *name_a, *name_b; name_a = p->one->mode ? p->one->path : p->two->path; name_b = NULL; strip_prefix(opt->prefix_length, &name_a, &name_b); write_name_quoted(name_a, opt->file, line_termination); } } int diff_unmodified_pair(struct diff_filepair *p) { /* This function is written stricter than necessary to support * the currently implemented transformers, but the idea is to * let transformers to produce diff_filepairs any way they want, * and filter and clean them up here before producing the output. */ struct diff_filespec *one = p->one, *two = p->two; if (DIFF_PAIR_UNMERGED(p)) return 0; /* unmerged is interesting */ /* deletion, addition, mode or type change * and rename are all interesting. */ if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || DIFF_PAIR_MODE_CHANGED(p) || strcmp(one->path, two->path)) return 0; /* both are valid and point at the same path. that is, we are * dealing with a change. */ if (one->sha1_valid && two->sha1_valid && !hashcmp(one->sha1, two->sha1) && !one->dirty_submodule && !two->dirty_submodule) return 1; /* no change */ if (!one->sha1_valid && !two->sha1_valid) return 1; /* both look at the same file on the filesystem. */ return 0; } static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) { if (diff_unmodified_pair(p)) return; if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) return; /* no tree diffs in patch format */ run_diff(p, o); } static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, struct diffstat_t *diffstat) { if (diff_unmodified_pair(p)) return; if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) return; /* no useful stat for tree diffs */ run_diffstat(p, o, diffstat); } static void diff_flush_checkdiff(struct diff_filepair *p, struct diff_options *o) { if (diff_unmodified_pair(p)) return; if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) return; /* nothing to check in tree diffs */ run_checkdiff(p, o); } int diff_queue_is_empty(void) { struct diff_queue_struct *q = &diff_queued_diff; int i; for (i = 0; i < q->nr; i++) if (!diff_unmodified_pair(q->queue[i])) return 0; return 1; } #if DIFF_DEBUG void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) { fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", x, one ? one : "", s->path, DIFF_FILE_VALID(s) ? "valid" : "invalid", s->mode, s->sha1_valid ? sha1_to_hex(s->sha1) : ""); fprintf(stderr, "queue[%d] %s size %lu\n", x, one ? one : "", s->size); } void diff_debug_filepair(const struct diff_filepair *p, int i) { diff_debug_filespec(p->one, i, "one"); diff_debug_filespec(p->two, i, "two"); fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", p->score, p->status ? p->status : '?', p->one->rename_used, p->broken_pair); } void diff_debug_queue(const char *msg, struct diff_queue_struct *q) { int i; if (msg) fprintf(stderr, "%s\n", msg); fprintf(stderr, "q->nr = %d\n", q->nr); for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; diff_debug_filepair(p, i); } } #endif static void diff_resolve_rename_copy(void) { int i; struct diff_filepair *p; struct diff_queue_struct *q = &diff_queued_diff; diff_debug_queue("resolve-rename-copy", q); for (i = 0; i < q->nr; i++) { p = q->queue[i]; p->status = 0; /* undecided */ if (DIFF_PAIR_UNMERGED(p)) p->status = DIFF_STATUS_UNMERGED; else if (!DIFF_FILE_VALID(p->one)) p->status = DIFF_STATUS_ADDED; else if (!DIFF_FILE_VALID(p->two)) p->status = DIFF_STATUS_DELETED; else if (DIFF_PAIR_TYPE_CHANGED(p)) p->status = DIFF_STATUS_TYPE_CHANGED; /* from this point on, we are dealing with a pair * whose both sides are valid and of the same type, i.e. * either in-place edit or rename/copy edit. */ else if (DIFF_PAIR_RENAME(p)) { /* * A rename might have re-connected a broken * pair up, causing the pathnames to be the * same again. If so, that's not a rename at * all, just a modification.. * * Otherwise, see if this source was used for * multiple renames, in which case we decrement * the count, and call it a copy. */ if (!strcmp(p->one->path, p->two->path)) p->status = DIFF_STATUS_MODIFIED; else if (--p->one->rename_used > 0) p->status = DIFF_STATUS_COPIED; else p->status = DIFF_STATUS_RENAMED; } else if (hashcmp(p->one->sha1, p->two->sha1) || p->one->mode != p->two->mode || p->one->dirty_submodule || p->two->dirty_submodule || is_null_sha1(p->one->sha1)) p->status = DIFF_STATUS_MODIFIED; else { /* This is a "no-change" entry and should not * happen anymore, but prepare for broken callers. */ error("feeding unmodified %s to diffcore", p->one->path); p->status = DIFF_STATUS_UNKNOWN; } } diff_debug_queue("resolve-rename-copy done", q); } static int check_pair_status(struct diff_filepair *p) { switch (p->status) { case DIFF_STATUS_UNKNOWN: return 0; case 0: die("internal error in diff-resolve-rename-copy"); default: return 1; } } static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) { int fmt = opt->output_format; if (fmt & DIFF_FORMAT_CHECKDIFF) diff_flush_checkdiff(p, opt); else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) diff_flush_raw(p, opt); else if (fmt & DIFF_FORMAT_NAME) { const char *name_a, *name_b; name_a = p->two->path; name_b = NULL; strip_prefix(opt->prefix_length, &name_a, &name_b); write_name_quoted(name_a, opt->file, opt->line_termination); } } static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) { if (fs->mode) fprintf(file, " %s mode %06o ", newdelete, fs->mode); else fprintf(file, " %s ", newdelete); write_name_quoted(fs->path, file, '\n'); } static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, const char *line_prefix) { if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, p->two->mode, show_name ? ' ' : '\n'); if (show_name) { write_name_quoted(p->two->path, file, '\n'); } } } static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, const char *line_prefix) { char *names = pprint_rename(p->one->path, p->two->path); fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); free(names); show_mode_change(file, p, 0, line_prefix); } static void diff_summary(struct diff_options *opt, struct diff_filepair *p) { FILE *file = opt->file; const char *line_prefix = diff_line_prefix(opt); switch(p->status) { case DIFF_STATUS_DELETED: fputs(line_prefix, file); show_file_mode_name(file, "delete", p->one); break; case DIFF_STATUS_ADDED: fputs(line_prefix, file); show_file_mode_name(file, "create", p->two); break; case DIFF_STATUS_COPIED: fputs(line_prefix, file); show_rename_copy(file, "copy", p, line_prefix); break; case DIFF_STATUS_RENAMED: fputs(line_prefix, file); show_rename_copy(file, "rename", p, line_prefix); break; default: if (p->score) { fprintf(file, "%s rewrite ", line_prefix); write_name_quoted(p->two->path, file, ' '); fprintf(file, "(%d%%)\n", similarity_index(p)); } show_mode_change(file, p, !p->score, line_prefix); break; } } struct patch_id_t { git_SHA_CTX *ctx; int patchlen; }; static int remove_space(char *line, int len) { int i; char *dst = line; unsigned char c; for (i = 0; i < len; i++) if (!isspace((c = line[i]))) *dst++ = c; return dst - line; } static void patch_id_consume(void *priv, char *line, unsigned long len) { struct patch_id_t *data = priv; int new_len; /* Ignore line numbers when computing the SHA1 of the patch */ if (starts_with(line, "@@ -")) return; new_len = remove_space(line, len); git_SHA1_Update(data->ctx, line, new_len); data->patchlen += new_len; } /* returns 0 upon success, and writes result into sha1 */ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) { struct diff_queue_struct *q = &diff_queued_diff; int i; git_SHA_CTX ctx; struct patch_id_t data; char buffer[PATH_MAX * 4 + 20]; git_SHA1_Init(&ctx); memset(&data, 0, sizeof(struct patch_id_t)); data.ctx = &ctx; for (i = 0; i < q->nr; i++) { xpparam_t xpp; xdemitconf_t xecfg; mmfile_t mf1, mf2; struct diff_filepair *p = q->queue[i]; int len1, len2; memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); if (p->status == 0) return error("internal diff status error"); if (p->status == DIFF_STATUS_UNKNOWN) continue; if (diff_unmodified_pair(p)) continue; if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) continue; if (DIFF_PAIR_UNMERGED(p)) continue; diff_fill_sha1_info(p->one); diff_fill_sha1_info(p->two); if (fill_mmfile(&mf1, p->one) < 0 || fill_mmfile(&mf2, p->two) < 0) return error("unable to read files to diff"); len1 = remove_space(p->one->path, strlen(p->one->path)); len2 = remove_space(p->two->path, strlen(p->two->path)); if (p->one->mode == 0) len1 = snprintf(buffer, sizeof(buffer), "diff--gita/%.*sb/%.*s" "newfilemode%06o" "---/dev/null" "+++b/%.*s", len1, p->one->path, len2, p->two->path, p->two->mode, len2, p->two->path); else if (p->two->mode == 0) len1 = snprintf(buffer, sizeof(buffer), "diff--gita/%.*sb/%.*s" "deletedfilemode%06o" "---a/%.*s" "+++/dev/null", len1, p->one->path, len2, p->two->path, p->one->mode, len1, p->one->path); else len1 = snprintf(buffer, sizeof(buffer), "diff--gita/%.*sb/%.*s" "---a/%.*s" "+++b/%.*s", len1, p->one->path, len2, p->two->path, len1, p->one->path, len2, p->two->path); git_SHA1_Update(&ctx, buffer, len1); if (diff_filespec_is_binary(p->one) || diff_filespec_is_binary(p->two)) { git_SHA1_Update(&ctx, sha1_to_hex(p->one->sha1), 40); git_SHA1_Update(&ctx, sha1_to_hex(p->two->sha1), 40); continue; } xpp.flags = 0; xecfg.ctxlen = 3; xecfg.flags = 0; xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, &xpp, &xecfg); } git_SHA1_Final(sha1, &ctx); return 0; } int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) { struct diff_queue_struct *q = &diff_queued_diff; int i; int result = diff_get_patch_id(options, sha1); for (i = 0; i < q->nr; i++) diff_free_filepair(q->queue[i]); free(q->queue); DIFF_QUEUE_CLEAR(q); return result; } static int is_summary_empty(const struct diff_queue_struct *q) { int i; for (i = 0; i < q->nr; i++) { const struct diff_filepair *p = q->queue[i]; switch (p->status) { case DIFF_STATUS_DELETED: case DIFF_STATUS_ADDED: case DIFF_STATUS_COPIED: case DIFF_STATUS_RENAMED: return 0; default: if (p->score) return 0; if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) return 0; break; } } return 1; } static const char rename_limit_warning[] = "inexact rename detection was skipped due to too many files."; static const char degrade_cc_to_c_warning[] = "only found copies from modified paths due to too many files."; static const char rename_limit_advice[] = "you may want to set your %s variable to at least " "%d and retry the command."; void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) { if (degraded_cc) warning(degrade_cc_to_c_warning); else if (needed) warning(rename_limit_warning); else return; if (0 < needed && needed < 32767) warning(rename_limit_advice, varname, needed); } void diff_flush(struct diff_options *options) { struct diff_queue_struct *q = &diff_queued_diff; int i, output_format = options->output_format; int separator = 0; int dirstat_by_line = 0; /* * Order: raw, stat, summary, patch * or: name/name-status/checkdiff (other bits clear) */ if (!q->nr) goto free_queue; if (output_format & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME | DIFF_FORMAT_NAME_STATUS | DIFF_FORMAT_CHECKDIFF)) { for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (check_pair_status(p)) flush_one_pair(p, options); } separator++; } if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) dirstat_by_line = 1; if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || dirstat_by_line) { struct diffstat_t diffstat; memset(&diffstat, 0, sizeof(struct diffstat_t)); for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (check_pair_status(p)) diff_flush_stat(p, options, &diffstat); } if (output_format & DIFF_FORMAT_NUMSTAT) show_numstat(&diffstat, options); if (output_format & DIFF_FORMAT_DIFFSTAT) show_stats(&diffstat, options); if (output_format & DIFF_FORMAT_SHORTSTAT) show_shortstats(&diffstat, options); if (output_format & DIFF_FORMAT_DIRSTAT) show_dirstat_by_line(&diffstat, options); free_diffstat_info(&diffstat); separator++; } if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) show_dirstat(options); if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { for (i = 0; i < q->nr; i++) { diff_summary(options, q->queue[i]); } separator++; } if (output_format & DIFF_FORMAT_NO_OUTPUT && DIFF_OPT_TST(options, EXIT_WITH_STATUS) && DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { /* * run diff_flush_patch for the exit status. setting * options->file to /dev/null should be safe, because we * aren't supposed to produce any output anyway. */ if (options->close_file) fclose(options->file); options->file = fopen("/dev/null", "w"); if (!options->file) die_errno("Could not open /dev/null"); options->close_file = 1; for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (check_pair_status(p)) diff_flush_patch(p, options); if (options->found_changes) break; } } if (output_format & DIFF_FORMAT_PATCH) { if (separator) { fprintf(options->file, "%s%c", diff_line_prefix(options), options->line_termination); if (options->stat_sep) { /* attach patch instead of inline */ fputs(options->stat_sep, options->file); } } for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (check_pair_status(p)) diff_flush_patch(p, options); } } if (output_format & DIFF_FORMAT_CALLBACK) options->format_callback(q, options, options->format_callback_data); for (i = 0; i < q->nr; i++) diff_free_filepair(q->queue[i]); free_queue: free(q->queue); DIFF_QUEUE_CLEAR(q); if (options->close_file) fclose(options->file); /* * Report the content-level differences with HAS_CHANGES; * diff_addremove/diff_change does not set the bit when * DIFF_FROM_CONTENTS is in effect (e.g. with -w). */ if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { if (options->found_changes) DIFF_OPT_SET(options, HAS_CHANGES); else DIFF_OPT_CLR(options, HAS_CHANGES); } } static int match_filter(const struct diff_options *options, const struct diff_filepair *p) { return (((p->status == DIFF_STATUS_MODIFIED) && ((p->score && filter_bit_tst(DIFF_STATUS_FILTER_BROKEN, options)) || (!p->score && filter_bit_tst(DIFF_STATUS_MODIFIED, options)))) || ((p->status != DIFF_STATUS_MODIFIED) && filter_bit_tst(p->status, options))); } static void diffcore_apply_filter(struct diff_options *options) { int i; struct diff_queue_struct *q = &diff_queued_diff; struct diff_queue_struct outq; DIFF_QUEUE_CLEAR(&outq); if (!options->filter) return; if (filter_bit_tst(DIFF_STATUS_FILTER_AON, options)) { int found; for (i = found = 0; !found && i < q->nr; i++) { if (match_filter(options, q->queue[i])) found++; } if (found) return; /* otherwise we will clear the whole queue * by copying the empty outq at the end of this * function, but first clear the current entries * in the queue. */ for (i = 0; i < q->nr; i++) diff_free_filepair(q->queue[i]); } else { /* Only the matching ones */ for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (match_filter(options, p)) diff_q(&outq, p); else diff_free_filepair(p); } } free(q->queue); *q = outq; } /* Check whether two filespecs with the same mode and size are identical */ static int diff_filespec_is_identical(struct diff_filespec *one, struct diff_filespec *two) { if (S_ISGITLINK(one->mode)) return 0; if (diff_populate_filespec(one, 0)) return 0; if (diff_populate_filespec(two, 0)) return 0; return !memcmp(one->data, two->data, one->size); } static int diff_filespec_check_stat_unmatch(struct diff_filepair *p) { if (p->done_skip_stat_unmatch) return p->skip_stat_unmatch_result; p->done_skip_stat_unmatch = 1; p->skip_stat_unmatch_result = 0; /* * 1. Entries that come from stat info dirtiness * always have both sides (iow, not create/delete), * one side of the object name is unknown, with * the same mode and size. Keep the ones that * do not match these criteria. They have real * differences. * * 2. At this point, the file is known to be modified, * with the same mode and size, and the object * name of one side is unknown. Need to inspect * the identical contents. */ if (!DIFF_FILE_VALID(p->one) || /* (1) */ !DIFF_FILE_VALID(p->two) || (p->one->sha1_valid && p->two->sha1_valid) || (p->one->mode != p->two->mode) || diff_populate_filespec(p->one, 1) || diff_populate_filespec(p->two, 1) || (p->one->size != p->two->size) || !diff_filespec_is_identical(p->one, p->two)) /* (2) */ p->skip_stat_unmatch_result = 1; return p->skip_stat_unmatch_result; } static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) { int i; struct diff_queue_struct *q = &diff_queued_diff; struct diff_queue_struct outq; DIFF_QUEUE_CLEAR(&outq); for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (diff_filespec_check_stat_unmatch(p)) diff_q(&outq, p); else { /* * The caller can subtract 1 from skip_stat_unmatch * to determine how many paths were dirty only * due to stat info mismatch. */ if (!DIFF_OPT_TST(diffopt, NO_INDEX)) diffopt->skip_stat_unmatch++; diff_free_filepair(p); } } free(q->queue); *q = outq; } static int diffnamecmp(const void *a_, const void *b_) { const struct diff_filepair *a = *((const struct diff_filepair **)a_); const struct diff_filepair *b = *((const struct diff_filepair **)b_); const char *name_a, *name_b; name_a = a->one ? a->one->path : a->two->path; name_b = b->one ? b->one->path : b->two->path; return strcmp(name_a, name_b); } void diffcore_fix_diff_index(struct diff_options *options) { struct diff_queue_struct *q = &diff_queued_diff; qsort(q->queue, q->nr, sizeof(q->queue[0]), diffnamecmp); } void diffcore_std(struct diff_options *options) { if (options->skip_stat_unmatch) diffcore_skip_stat_unmatch(options); if (!options->found_follow) { /* See try_to_follow_renames() in tree-diff.c */ if (options->break_opt != -1) diffcore_break(options->break_opt); if (options->detect_rename) diffcore_rename(options); if (options->break_opt != -1) diffcore_merge_broken(); } if (options->pickaxe) diffcore_pickaxe(options); if (options->orderfile) diffcore_order(options->orderfile); if (!options->found_follow) /* See try_to_follow_renames() in tree-diff.c */ diff_resolve_rename_copy(); diffcore_apply_filter(options); if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) DIFF_OPT_SET(options, HAS_CHANGES); else DIFF_OPT_CLR(options, HAS_CHANGES); options->found_follow = 0; } int diff_result_code(struct diff_options *opt, int status) { int result = 0; diff_warn_rename_limit("diff.renameLimit", opt->needed_rename_limit, opt->degraded_cc_to_c); if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) return status; if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && DIFF_OPT_TST(opt, HAS_CHANGES)) result |= 01; if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && DIFF_OPT_TST(opt, CHECK_FAILED)) result |= 02; return result; } int diff_can_quit_early(struct diff_options *opt) { return (DIFF_OPT_TST(opt, QUICK) && !opt->filter && DIFF_OPT_TST(opt, HAS_CHANGES)); } /* * Shall changes to this submodule be ignored? * * Submodule changes can be configured to be ignored separately for each path, * but that configuration can be overridden from the command line. */ static int is_submodule_ignored(const char *path, struct diff_options *options) { int ignored = 0; unsigned orig_flags = options->flags; if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) set_diffopt_flags_from_submodule_config(options, path); if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) ignored = 1; options->flags = orig_flags; return ignored; } void diff_addremove(struct diff_options *options, int addremove, unsigned mode, const unsigned char *sha1, int sha1_valid, const char *concatpath, unsigned dirty_submodule) { struct diff_filespec *one, *two; if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) return; /* This may look odd, but it is a preparation for * feeding "there are unchanged files which should * not produce diffs, but when you are doing copy * detection you would need them, so here they are" * entries to the diff-core. They will be prefixed * with something like '=' or '*' (I haven't decided * which but should not make any difference). * Feeding the same new and old to diff_change() * also has the same effect. * Before the final output happens, they are pruned after * merged into rename/copy pairs as appropriate. */ if (DIFF_OPT_TST(options, REVERSE_DIFF)) addremove = (addremove == '+' ? '-' : addremove == '-' ? '+' : addremove); if (options->prefix && strncmp(concatpath, options->prefix, options->prefix_length)) return; one = alloc_filespec(concatpath); two = alloc_filespec(concatpath); if (addremove != '+') fill_filespec(one, sha1, sha1_valid, mode); if (addremove != '-') { fill_filespec(two, sha1, sha1_valid, mode); two->dirty_submodule = dirty_submodule; } diff_queue(&diff_queued_diff, one, two); if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) DIFF_OPT_SET(options, HAS_CHANGES); } void diff_change(struct diff_options *options, unsigned old_mode, unsigned new_mode, const unsigned char *old_sha1, const unsigned char *new_sha1, int old_sha1_valid, int new_sha1_valid, const char *concatpath, unsigned old_dirty_submodule, unsigned new_dirty_submodule) { struct diff_filespec *one, *two; struct diff_filepair *p; if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && is_submodule_ignored(concatpath, options)) return; if (DIFF_OPT_TST(options, REVERSE_DIFF)) { unsigned tmp; const unsigned char *tmp_c; tmp = old_mode; old_mode = new_mode; new_mode = tmp; tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; tmp = old_sha1_valid; old_sha1_valid = new_sha1_valid; new_sha1_valid = tmp; tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule; new_dirty_submodule = tmp; } if (options->prefix && strncmp(concatpath, options->prefix, options->prefix_length)) return; one = alloc_filespec(concatpath); two = alloc_filespec(concatpath); fill_filespec(one, old_sha1, old_sha1_valid, old_mode); fill_filespec(two, new_sha1, new_sha1_valid, new_mode); one->dirty_submodule = old_dirty_submodule; two->dirty_submodule = new_dirty_submodule; p = diff_queue(&diff_queued_diff, one, two); if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) return; if (DIFF_OPT_TST(options, QUICK) && options->skip_stat_unmatch && !diff_filespec_check_stat_unmatch(p)) return; DIFF_OPT_SET(options, HAS_CHANGES); } struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) { struct diff_filepair *pair; struct diff_filespec *one, *two; if (options->prefix && strncmp(path, options->prefix, options->prefix_length)) return NULL; one = alloc_filespec(path); two = alloc_filespec(path); pair = diff_queue(&diff_queued_diff, one, two); pair->is_unmerged = 1; return pair; } static char *run_textconv(const char *pgm, struct diff_filespec *spec, size_t *outsize) { struct diff_tempfile *temp; const char *argv[3]; const char **arg = argv; struct child_process child; struct strbuf buf = STRBUF_INIT; int err = 0; temp = prepare_temp_file(spec->path, spec); *arg++ = pgm; *arg++ = temp->name; *arg = NULL; memset(&child, 0, sizeof(child)); child.use_shell = 1; child.argv = argv; child.out = -1; if (start_command(&child)) { remove_tempfile(); return NULL; } if (strbuf_read(&buf, child.out, 0) < 0) err = error("error reading from textconv command '%s'", pgm); close(child.out); if (finish_command(&child) || err) { strbuf_release(&buf); remove_tempfile(); return NULL; } remove_tempfile(); return strbuf_detach(&buf, outsize); } size_t fill_textconv(struct userdiff_driver *driver, struct diff_filespec *df, char **outbuf) { size_t size; if (!driver || !driver->textconv) { if (!DIFF_FILE_VALID(df)) { *outbuf = ""; return 0; } if (diff_populate_filespec(df, 0)) die("unable to read files to diff"); *outbuf = df->data; return df->size; } if (driver->textconv_cache && df->sha1_valid) { *outbuf = notes_cache_get(driver->textconv_cache, df->sha1, &size); if (*outbuf) return size; } *outbuf = run_textconv(driver->textconv, df, &size); if (!*outbuf) die("unable to read files to diff"); if (driver->textconv_cache && df->sha1_valid) { /* ignore errors, as we might be in a readonly repository */ notes_cache_put(driver->textconv_cache, df->sha1, *outbuf, size); /* * we could save up changes and flush them all at the end, * but we would need an extra call after all diffing is done. * Since generating a cache entry is the slow path anyway, * this extra overhead probably isn't a big deal. */ notes_cache_write(driver->textconv_cache); } return size; } void setup_diff_pager(struct diff_options *opt) { /* * If the user asked for our exit code, then either they want --quiet * or --exit-code. We should definitely not bother with a pager in the * former case, as we will generate no output. Since we still properly * report our exit code even when a pager is run, we _could_ run a * pager with --exit-code. But since we have not done so historically, * and because it is easy to find people oneline advising "git diff * --exit-code" in hooks and other scripts, we do not do so. */ if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && check_pager_config("diff") != 0) setup_pager(); }