diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 537 |
1 files changed, 239 insertions, 298 deletions
@@ -11,6 +11,7 @@ #include "attr.h" #include "run-command.h" #include "utf8.h" +#include "userdiff.h" #ifdef NO_FAST_WORKING_DIRECTORY #define FAST_WORKING_DIRECTORY 0 @@ -20,9 +21,11 @@ static int diff_detect_rename_default; static int diff_rename_limit_default = 200; +static int diff_suppress_blank_empty; int diff_use_color_default = -1; static const char *external_diff_cmd_cfg; int diff_auto_refresh_index = 1; +static int diff_mnemonic_prefix; static char diff_colors[][COLOR_MAXLEN] = { "\033[m", /* reset */ @@ -35,6 +38,9 @@ static char diff_colors[][COLOR_MAXLEN] = { "\033[41m", /* WHITESPACE (red background) */ }; +static void diff_filespec_load_driver(struct diff_filespec *one); +static char *run_textconv(const char *, struct diff_filespec *, size_t *); + static int parse_diff_color_slot(const char *var, int ofs) { if (!strcasecmp(var+ofs, "plain")) @@ -54,80 +60,6 @@ static int parse_diff_color_slot(const char *var, int ofs) die("bad config variable '%s'", var); } -static struct ll_diff_driver { - const char *name; - struct ll_diff_driver *next; - const char *cmd; -} *user_diff, **user_diff_tail; - -/* - * Currently there is only "diff.<drivername>.command" variable; - * because there are "diff.color.<slot>" variables, we are parsing - * this in a bit convoluted way to allow low level diff driver - * called "color". - */ -static int parse_lldiff_command(const char *var, const char *ep, const char *value) -{ - const char *name; - int namelen; - struct ll_diff_driver *drv; - - name = var + 5; - namelen = ep - name; - for (drv = user_diff; drv; drv = drv->next) - if (!strncmp(drv->name, name, namelen) && !drv->name[namelen]) - break; - if (!drv) { - drv = xcalloc(1, sizeof(struct ll_diff_driver)); - drv->name = xmemdupz(name, namelen); - if (!user_diff_tail) - user_diff_tail = &user_diff; - *user_diff_tail = drv; - user_diff_tail = &(drv->next); - } - - return git_config_string(&(drv->cmd), var, value); -} - -/* - * 'diff.<what>.funcname' attribute can be specified in the configuration - * to define a customized regexp to find the beginning of a function to - * be used for hunk header lines of "diff -p" style output. - */ -struct funcname_pattern_entry { - char *name; - char *pattern; - int cflags; -}; -static struct funcname_pattern_list { - struct funcname_pattern_list *next; - struct funcname_pattern_entry e; -} *funcname_pattern_list; - -static int parse_funcname_pattern(const char *var, const char *ep, const char *value, int cflags) -{ - const char *name; - int namelen; - struct funcname_pattern_list *pp; - - name = var + 5; /* "diff." */ - namelen = ep - name; - - for (pp = funcname_pattern_list; pp; pp = pp->next) - if (!strncmp(pp->e.name, name, namelen) && !pp->e.name[namelen]) - break; - if (!pp) { - pp = xcalloc(1, sizeof(*pp)); - pp->e.name = xmemdupz(name, namelen); - pp->next = funcname_pattern_list; - funcname_pattern_list = pp; - } - free(pp->e.pattern); - pp->e.pattern = xstrdup(value); - pp->e.cflags = cflags; - return 0; -} - /* * These are to give UI layer defaults. * The core-level commands such as git-diff-files should @@ -154,14 +86,12 @@ int git_diff_ui_config(const char *var, const char *value, void *cb) 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.external")) return git_config_string(&external_diff_cmd_cfg, var, value); - if (!prefixcmp(var, "diff.")) { - const char *ep = strrchr(var, '.'); - - if (ep != var + 4 && !strcmp(ep, ".command")) - return parse_lldiff_command(var, ep, value); - } return git_diff_basic_config(var, value, cb); } @@ -173,6 +103,12 @@ int git_diff_basic_config(const char *var, const char *value, void *cb) return 0; } + switch (userdiff_config(var, value)) { + case 0: break; + case -1: return -1; + default: return 0; + } + if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) { int slot = parse_diff_color_slot(var, 11); if (!value) @@ -181,21 +117,12 @@ int git_diff_basic_config(const char *var, const char *value, void *cb) return 0; } - if (!prefixcmp(var, "diff.")) { - const char *ep = strrchr(var, '.'); - if (ep != var + 4) { - if (!strcmp(ep, ".funcname")) { - if (!value) - return config_error_nonbool(var); - return parse_funcname_pattern(var, ep, value, - 0); - } else if (!strcmp(ep, ".xfuncname")) { - if (!value) - return config_error_nonbool(var); - return parse_funcname_pattern(var, ep, value, - REG_EXTENDED); - } - } + /* 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; } return git_color_default_config(var, value, cb); @@ -205,9 +132,8 @@ 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; + struct strbuf res = STRBUF_INIT; - strbuf_init(&res, 0); if (need_one + need_two) { strbuf_addch(&res, '"'); quote_c_style(one, &res, NULL, 1); @@ -305,6 +231,8 @@ static void emit_rewrite_diff(const char *name_a, const char *name_b, struct diff_filespec *one, struct diff_filespec *two, + const char *textconv_one, + const char *textconv_two, struct diff_options *o) { int lc_a, lc_b; @@ -316,6 +244,17 @@ static void emit_rewrite_diff(const char *name_a, const char *new = diff_get_color(color_diff, DIFF_FILE_NEW); const char *reset = diff_get_color(color_diff, DIFF_RESET); static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; + const char *a_prefix, *b_prefix; + const char *data_one, *data_two; + size_t size_one, size_two; + + 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 == '/'); @@ -324,13 +263,32 @@ static void emit_rewrite_diff(const char *name_a, strbuf_reset(&a_name); strbuf_reset(&b_name); - quote_two_c_style(&a_name, o->a_prefix, name_a, 0); - quote_two_c_style(&b_name, o->b_prefix, name_b, 0); + quote_two_c_style(&a_name, a_prefix, name_a, 0); + quote_two_c_style(&b_name, b_prefix, name_b, 0); diff_populate_filespec(one, 0); diff_populate_filespec(two, 0); - lc_a = count_lines(one->data, one->size); - lc_b = count_lines(two->data, two->size); + if (textconv_one) { + data_one = run_textconv(textconv_one, one, &size_one); + if (!data_one) + die("unable to read files to diff"); + } + else { + data_one = one->data; + size_one = one->size; + } + if (textconv_two) { + data_two = run_textconv(textconv_two, two, &size_two); + if (!data_two) + die("unable to read files to diff"); + } + else { + data_two = two->data; + size_two = two->size; + } + + lc_a = count_lines(data_one, size_one); + lc_b = count_lines(data_two, size_two); fprintf(o->file, "%s--- %s%s%s\n%s+++ %s%s%s\n%s@@ -", metainfo, a_name.buf, name_a_tab, reset, @@ -340,9 +298,9 @@ static void emit_rewrite_diff(const char *name_a, print_line_count(o->file, lc_b); fprintf(o->file, " @@%s\n", reset); if (lc_a) - copy_file_with_prefix(o->file, '-', one->data, one->size, old, reset); + copy_file_with_prefix(o->file, '-', data_one, size_one, old, reset); if (lc_b) - copy_file_with_prefix(o->file, '+', two->data, two->size, new, reset); + copy_file_with_prefix(o->file, '+', data_two, size_two, new, reset); } static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) @@ -354,6 +312,7 @@ static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) } else if (diff_populate_filespec(one, 0)) return -1; + mf->ptr = one->data; mf->size = one->size; return 0; @@ -380,7 +339,6 @@ static void diff_words_append(char *line, unsigned long len, } struct diff_words_data { - struct xdiff_emit_state xm; struct diff_words_buffer minus, plus; FILE *file; }; @@ -451,6 +409,7 @@ static void diff_words_show(struct diff_words_data *diff_words) mmfile_t minus, plus; int i; + memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); minus.size = diff_words->minus.text.size; minus.ptr = xmalloc(minus.size); @@ -470,11 +429,8 @@ static void diff_words_show(struct diff_words_data *diff_words) xpp.flags = XDF_NEED_MINIMAL; xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc; - ecb.outf = xdiff_outf; - ecb.priv = diff_words; - diff_words->xm.consume = fn_out_diff_words_aux; - xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb); - + xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, + &xpp, &xecfg, &ecb); free(minus.ptr); free(plus.ptr); diff_words->minus.text.size = diff_words->plus.text.size = 0; @@ -488,7 +444,6 @@ static void diff_words_show(struct diff_words_data *diff_words) typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); struct emit_callback { - struct xdiff_emit_state xm; int nparents, color_diff; unsigned ws_rule; sane_truncate_fn truncate; @@ -598,6 +553,12 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) 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; + } + /* This is not really necessary for now because * this codepath only deals with two-way diffs. */ @@ -661,7 +622,7 @@ static char *pprint_rename(const char *a, const char *b) { const char *old = a; const char *new = b; - struct strbuf name; + struct strbuf name = STRBUF_INIT; int pfx_length, sfx_length; int len_a = strlen(a); int len_b = strlen(b); @@ -669,7 +630,6 @@ static char *pprint_rename(const char *a, const char *b) int qlen_a = quote_c_style(a, NULL, NULL, 0); int qlen_b = quote_c_style(b, NULL, NULL, 0); - strbuf_init(&name, 0); if (qlen_a || qlen_b) { quote_c_style(a, &name, NULL, 0); strbuf_addstr(&name, " => "); @@ -726,8 +686,6 @@ static char *pprint_rename(const char *a, const char *b) } struct diffstat_t { - struct xdiff_emit_state xm; - int nr; int alloc; struct diffstat_file { @@ -814,8 +772,7 @@ static void fill_print_name(struct diffstat_file *file) return; if (!file->is_renamed) { - struct strbuf buf; - strbuf_init(&buf, 0); + struct strbuf buf = STRBUF_INIT; if (quote_c_style(file->name, &buf, NULL, 0)) { pname = strbuf_detach(&buf, NULL); } else { @@ -1122,9 +1079,13 @@ static void show_dirstat(struct diff_options *options) /* * Original minus copied is the removed material, * added is the new material. They are both damages - * made to the preimage. + * made to the preimage. In --dirstat-by-file mode, count + * damaged files, not damaged lines. This is done by + * counting only a single damaged line per file. */ damage = (p->one->size - copied) + added; + if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE) && damage > 0) + damage = 1; ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); dir.files[dir.nr].name = name; @@ -1157,7 +1118,6 @@ static void free_diffstat_info(struct diffstat_t *diffstat) } struct checkdiff_t { - struct xdiff_emit_state xm; const char *filename; int lineno; struct diff_options *o; @@ -1332,123 +1292,55 @@ static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two) emit_binary_diff_body(file, two, one); } -static void setup_diff_attr_check(struct git_attr_check *check) +static void diff_filespec_load_driver(struct diff_filespec *one) { - static struct git_attr *attr_diff; - - if (!attr_diff) { - attr_diff = git_attr("diff", 4); - } - check[0].attr = attr_diff; + if (!one->driver) + one->driver = userdiff_find_by_path(one->path); + if (!one->driver) + one->driver = userdiff_find_by_name("default"); } -static void diff_filespec_check_attr(struct diff_filespec *one) +int diff_filespec_is_binary(struct diff_filespec *one) { - struct git_attr_check attr_diff_check; - int check_from_data = 0; - - if (one->checked_attr) - return; - - setup_diff_attr_check(&attr_diff_check); - one->is_binary = 0; - one->funcname_pattern_ident = NULL; - - if (!git_checkattr(one->path, 1, &attr_diff_check)) { - const char *value; - - /* binaryness */ - value = attr_diff_check.value; - if (ATTR_TRUE(value)) - ; - else if (ATTR_FALSE(value)) - one->is_binary = 1; - else - check_from_data = 1; - - /* funcname pattern ident */ - if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) - ; - else - one->funcname_pattern_ident = value; - } - - if (check_from_data) { - 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) { + 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; } -int diff_filespec_is_binary(struct diff_filespec *one) +static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) { - diff_filespec_check_attr(one); - return one->is_binary; + diff_filespec_load_driver(one); + return one->driver->funcname.pattern ? &one->driver->funcname : NULL; } -static const struct funcname_pattern_entry *funcname_pattern(const char *ident) -{ - struct funcname_pattern_list *pp; - - for (pp = funcname_pattern_list; pp; pp = pp->next) - if (!strcmp(ident, pp->e.name)) - return &pp->e; - return NULL; -} - -static const struct funcname_pattern_entry builtin_funcname_pattern[] = { - { "java", - "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n" - "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$", - REG_EXTENDED }, - { "pascal", - "^((procedure|function|constructor|destructor|interface|" - "implementation|initialization|finalization)[ \t]*.*)$" - "|" - "^(.*=[ \t]*(class|record).*)$", - REG_EXTENDED }, - { "bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$", - REG_EXTENDED }, - { "tex", - "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$", - REG_EXTENDED }, - { "ruby", "^[ \t]*((class|module|def)[ \t].*)$", - REG_EXTENDED }, -}; - -static const struct funcname_pattern_entry *diff_funcname_pattern(struct diff_filespec *one) +void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) { - const char *ident; - const struct funcname_pattern_entry *pe; - int i; - - diff_filespec_check_attr(one); - ident = one->funcname_pattern_ident; - - if (!ident) - /* - * If the config file has "funcname.default" defined, that - * regexp is used; otherwise NULL is returned and xemit uses - * the built-in default. - */ - return funcname_pattern("default"); - - /* Look up custom "funcname.$ident" regexp from config. */ - pe = funcname_pattern(ident); - if (pe) - return pe; - - /* - * And define built-in fallback patterns here. Note that - * these can be overridden by the user's config settings. - */ - for (i = 0; i < ARRAY_SIZE(builtin_funcname_pattern); i++) - if (!strcmp(ident, builtin_funcname_pattern[i].name)) - return &builtin_funcname_pattern[i]; + if (!options->a_prefix) + options->a_prefix = a; + if (!options->b_prefix) + options->b_prefix = b; +} - return NULL; +static const char *get_textconv(struct diff_filespec *one) +{ + if (!DIFF_FILE_VALID(one)) + return NULL; + if (!S_ISREG(one->mode)) + return NULL; + diff_filespec_load_driver(one); + return one->driver->textconv; } static void builtin_diff(const char *name_a, @@ -1464,13 +1356,29 @@ static void builtin_diff(const char *name_a, char *a_one, *b_two; const char *set = diff_get_color_opt(o, DIFF_METAINFO); const char *reset = diff_get_color_opt(o, DIFF_RESET); + const char *a_prefix, *b_prefix; + const char *textconv_one = NULL, *textconv_two = NULL; + + 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(o->a_prefix, name_a + (*name_a == '/')); - b_two = quote_two(o->b_prefix, name_b + (*name_b == '/')); + 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"; fprintf(o->file, "%sdiff --git %s %s%s\n", set, a_one, b_two, reset); @@ -1498,8 +1406,11 @@ static void builtin_diff(const char *name_a, */ if ((one->mode ^ two->mode) & S_IFMT) goto free_ab_and_return; - if (complete_rewrite) { - emit_rewrite_diff(name_a, name_b, one, two, o); + if (complete_rewrite && + (textconv_one || !diff_filespec_is_binary(one)) && + (textconv_two || !diff_filespec_is_binary(two))) { + emit_rewrite_diff(name_a, name_b, one, two, + textconv_one, textconv_two, o); o->found_changes = 1; goto free_ab_and_return; } @@ -1509,7 +1420,8 @@ static void builtin_diff(const char *name_a, die("unable to read files to diff"); if (!DIFF_OPT_TST(o, TEXT) && - (diff_filespec_is_binary(one) || diff_filespec_is_binary(two))) { + ( (diff_filespec_is_binary(one) && !textconv_one) || + (diff_filespec_is_binary(two) && !textconv_two) )) { /* Quite common confusing case */ if (mf1.size == mf2.size && !memcmp(mf1.ptr, mf2.ptr, mf1.size)) @@ -1528,12 +1440,28 @@ static void builtin_diff(const char *name_a, xdemitconf_t xecfg; xdemitcb_t ecb; struct emit_callback ecbdata; - const struct funcname_pattern_entry *pe; + const struct userdiff_funcname *pe; + + if (textconv_one) { + size_t size; + mf1.ptr = run_textconv(textconv_one, one, &size); + if (!mf1.ptr) + die("unable to read files to diff"); + mf1.size = size; + } + if (textconv_two) { + size_t size; + mf2.ptr = run_textconv(textconv_two, two, &size); + if (!mf2.ptr) + die("unable to read files to diff"); + mf2.size = size; + } 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; @@ -1552,17 +1480,19 @@ static void builtin_diff(const char *name_a, xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); else if (!prefixcmp(diffopts, "-u")) xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); - ecb.outf = xdiff_outf; - ecb.priv = &ecbdata; - ecbdata.xm.consume = fn_out_consume; if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) { ecbdata.diff_words = xcalloc(1, sizeof(struct diff_words_data)); ecbdata.diff_words->file = o->file; } - xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); + xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, + &xpp, &xecfg, &ecb); if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) free_diff_words_data(&ecbdata); + if (textconv_one) + free(mf1.ptr); + if (textconv_two) + free(mf2.ptr); } free_ab_and_return: @@ -1609,11 +1539,11 @@ static void builtin_diffstat(const char *name_a, const char *name_b, xdemitconf_t xecfg; xdemitcb_t ecb; + memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; - ecb.outf = xdiff_outf; - ecb.priv = diffstat; - xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); + xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, + &xpp, &xecfg, &ecb); } free_and_return: @@ -1634,7 +1564,6 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, return; memset(&data, 0, sizeof(data)); - data.xm.consume = checkdiff_consume; data.filename = name_b ? name_b : name_a; data.lineno = 0; data.o = o; @@ -1657,12 +1586,12 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, xdemitconf_t xecfg; xdemitcb_t ecb; + memset(&xpp, 0, sizeof(xpp)); memset(&xecfg, 0, sizeof(xecfg)); xecfg.ctxlen = 1; /* at least one context line */ xpp.flags = XDF_NEED_MINIMAL; - ecb.outf = xdiff_outf; - ecb.priv = &data; - xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); + xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, + &xpp, &xecfg, &ecb); if ((data.ws_rule & WS_TRAILING_SPACE) && data.trailing_blanks_start) { @@ -1687,6 +1616,7 @@ struct diff_filespec *alloc_filespec(const char *path) spec->path = (char *)(spec + 1); memcpy(spec->path, path, namelen+1); spec->count = 1; + spec->is_binary = -1; return spec; } @@ -1771,10 +1701,9 @@ static int reuse_worktree_file(const char *name, const unsigned char *sha1, int static int populate_from_stdin(struct diff_filespec *s) { - struct strbuf buf; + struct strbuf buf = STRBUF_INIT; size_t size = 0; - strbuf_init(&buf, 0); if (strbuf_read(&buf, 0, 0) < 0) return error("error while reading from stdin %s", strerror(errno)); @@ -1826,7 +1755,7 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only) if (!s->sha1_valid || reuse_worktree_file(s->path, s->sha1, 0)) { - struct strbuf buf; + struct strbuf buf = STRBUF_INIT; struct stat st; int fd; @@ -1846,19 +1775,18 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only) s->size = xsize_t(st.st_size); if (!s->size) goto empty; - if (size_only) - return 0; if (S_ISLNK(st.st_mode)) { - int ret; - s->data = xmalloc(s->size); - s->should_free = 1; - ret = readlink(s->path, s->data, s->size); - if (ret < 0) { - free(s->data); + 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; @@ -1869,7 +1797,6 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only) /* * Convert from working tree format to canonical git format */ - strbuf_init(&buf, 0); if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) { size_t size = 0; munmap(s->data, s->size); @@ -1957,13 +1884,12 @@ static void prepare_temp_file(const char *name, if (S_ISLNK(st.st_mode)) { int ret; char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */ - size_t sz = xsize_t(st.st_size); - if (sizeof(buf) <= st.st_size) - die("symlink too long: %s", name); - ret = readlink(name, buf, sz); + ret = readlink(name, buf, sizeof(buf)); if (ret < 0) die("readlink(%s)", name); - prep_temp_blob(temp, buf, sz, + if (ret == sizeof(buf)) + die("symlink too long: %s", name); + prep_temp_blob(temp, buf, ret, (one->sha1_valid ? one->sha1 : null_sha1), (one->sha1_valid ? @@ -2073,29 +1999,6 @@ static void run_external_diff(const char *pgm, } } -static const char *external_diff_attr(const char *name) -{ - struct git_attr_check attr_diff_check; - - if (!name) - return NULL; - - setup_diff_attr_check(&attr_diff_check); - if (!git_checkattr(name, 1, &attr_diff_check)) { - const char *value = attr_diff_check.value; - if (!ATTR_TRUE(value) && - !ATTR_FALSE(value) && - !ATTR_UNSET(value)) { - struct ll_diff_driver *drv; - - for (drv = user_diff; drv; drv = drv->next) - if (!strcmp(drv->name, value)) - return drv->cmd; - } - } - return NULL; -} - static void run_diff_cmd(const char *pgm, const char *name, const char *other, @@ -2109,9 +2012,9 @@ static void run_diff_cmd(const char *pgm, if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) pgm = NULL; else { - const char *cmd = external_diff_attr(attr_path); - if (cmd) - pgm = cmd; + struct userdiff_driver *drv = userdiff_find_by_path(attr_path); + if (drv && drv->external) + pgm = drv->external; } if (pgm) { @@ -2332,8 +2235,10 @@ void diff_setup(struct diff_options *options) DIFF_OPT_CLR(options, COLOR_DIFF); options->detect_rename = diff_detect_rename_default; - options->a_prefix = "a/"; - options->b_prefix = "b/"; + if (!diff_mnemonic_prefix) { + options->a_prefix = "a/"; + options->b_prefix = "b/"; + } } int diff_setup_done(struct diff_options *options) @@ -2490,6 +2395,10 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) else if (!strcmp(arg, "--cumulative")) { options->output_format |= DIFF_FORMAT_DIRSTAT; DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); + } else if (opt_arg(arg, 0, "dirstat-by-file", + &options->dirstat_percent)) { + options->output_format |= DIFF_FORMAT_DIRSTAT; + DIFF_OPT_SET(options, DIRSTAT_BY_FILE); } else if (!strcmp(arg, "--check")) options->output_format |= DIFF_FORMAT_CHECKDIFF; @@ -2594,6 +2503,10 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) 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, IGNORE_SUBMODULES); @@ -3046,8 +2959,7 @@ static void diff_summary(FILE *file, struct diff_filepair *p) } struct patch_id_t { - struct xdiff_emit_state xm; - SHA_CTX *ctx; + git_SHA_CTX *ctx; int patchlen; }; @@ -3075,7 +2987,7 @@ static void patch_id_consume(void *priv, char *line, unsigned long len) new_len = remove_space(line, len); - SHA1_Update(data->ctx, line, new_len); + git_SHA1_Update(data->ctx, line, new_len); data->patchlen += new_len; } @@ -3084,14 +2996,13 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) { struct diff_queue_struct *q = &diff_queued_diff; int i; - SHA_CTX ctx; + git_SHA_CTX ctx; struct patch_id_t data; char buffer[PATH_MAX * 4 + 20]; - SHA1_Init(&ctx); + git_SHA1_Init(&ctx); memset(&data, 0, sizeof(struct patch_id_t)); data.ctx = &ctx; - data.xm.consume = patch_id_consume; for (i = 0; i < q->nr; i++) { xpparam_t xpp; @@ -3101,6 +3012,7 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) 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"); @@ -3151,17 +3063,16 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) len2, p->two->path, len1, p->one->path, len2, p->two->path); - SHA1_Update(&ctx, buffer, len1); + git_SHA1_Update(&ctx, buffer, len1); xpp.flags = XDF_NEED_MINIMAL; xecfg.ctxlen = 3; xecfg.flags = XDL_EMIT_FUNCNAMES; - ecb.outf = xdiff_outf; - ecb.priv = &data; - xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); + xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, + &xpp, &xecfg, &ecb); } - SHA1_Final(sha1, &ctx); + git_SHA1_Final(sha1, &ctx); return 0; } @@ -3235,7 +3146,6 @@ void diff_flush(struct diff_options *options) struct diffstat_t diffstat; memset(&diffstat, 0, sizeof(struct diffstat_t)); - diffstat.xm.consume = diffstat_consume; for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (check_pair_status(p)) @@ -3532,3 +3442,34 @@ void diff_unmerge(struct diff_options *options, fill_filespec(one, sha1, mode); diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1; } + +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; + + prepare_temp_file(spec->path, &temp, spec); + *arg++ = pgm; + *arg++ = temp.name; + *arg = NULL; + + memset(&child, 0, sizeof(child)); + child.argv = argv; + child.out = -1; + if (start_command(&child) != 0 || + strbuf_read(&buf, child.out, 0) < 0 || + finish_command(&child) != 0) { + if (temp.name == temp.tmp_path) + unlink(temp.name); + error("error running textconv command '%s'", pgm); + return NULL; + } + if (temp.name == temp.tmp_path) + unlink(temp.name); + + return strbuf_detach(&buf, outsize); +} |