diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 79 |
1 files changed, 70 insertions, 9 deletions
@@ -25,6 +25,20 @@ int git_diff_config(const char *var, const char *value) return git_default_config(var, value); } +enum color_diff { + DIFF_PLAIN = 0, + DIFF_METAINFO = 1, + DIFF_FILE_OLD = 2, + DIFF_FILE_NEW = 3, +}; + +static const char *diff_colors[] = { + "\033[0;0m", + "\033[1;35m", + "\033[1;31m", + "\033[1;34m", +}; + static char *quote_one(const char *str) { int needlen; @@ -177,23 +191,54 @@ static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) } struct emit_callback { + struct xdiff_emit_state xm; + int nparents, color_diff; const char **label_path; }; -static int fn_out(void *priv, mmbuffer_t *mb, int nbuf) +static inline void color_diff(int diff_use_color, enum color_diff ix) +{ + if (diff_use_color) + fputs(diff_colors[ix], stdout); +} + +static void fn_out_consume(void *priv, char *line, unsigned long len) { int i; struct emit_callback *ecbdata = priv; if (ecbdata->label_path[0]) { + color_diff(ecbdata->color_diff, DIFF_METAINFO); printf("--- %s\n", ecbdata->label_path[0]); + color_diff(ecbdata->color_diff, DIFF_METAINFO); printf("+++ %s\n", ecbdata->label_path[1]); ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; } - for (i = 0; i < nbuf; i++) - if (!fwrite(mb[i].ptr, mb[i].size, 1, stdout)) - return -1; - return 0; + + /* This is not really necessary for now because + * this codepath only deals with two-way diffs. + */ + for (i = 0; i < len && line[i] == '@'; i++) + ; + if (2 <= i && i < len && line[i] == ' ') { + ecbdata->nparents = i - 1; + color_diff(ecbdata->color_diff, DIFF_METAINFO); + } + else if (len < ecbdata->nparents) + color_diff(ecbdata->color_diff, DIFF_PLAIN); + else { + int nparents = ecbdata->nparents; + int color = DIFF_PLAIN; + for (i = 0; i < nparents && len; i++) { + if (line[i] == '-') + color = DIFF_FILE_OLD; + else if (line[i] == '+') + color = DIFF_FILE_NEW; + } + color_diff(ecbdata->color_diff, color); + } + fwrite(line, len, 1, stdout); + color_diff(ecbdata->color_diff, DIFF_PLAIN); } static char *pprint_rename(const char *a, const char *b) @@ -549,25 +594,35 @@ static void builtin_diff(const char *name_a, b_two = quote_two("b/", name_b); lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; + color_diff(o->color_diff, DIFF_METAINFO); printf("diff --git %s %s\n", a_one, b_two); if (lbl[0][0] == '/') { /* /dev/null */ + color_diff(o->color_diff, DIFF_METAINFO); printf("new file mode %06o\n", two->mode); - if (xfrm_msg && xfrm_msg[0]) + if (xfrm_msg && xfrm_msg[0]) { + color_diff(o->color_diff, DIFF_METAINFO); puts(xfrm_msg); + } } else if (lbl[1][0] == '/') { printf("deleted file mode %06o\n", one->mode); - if (xfrm_msg && xfrm_msg[0]) + if (xfrm_msg && xfrm_msg[0]) { + color_diff(o->color_diff, DIFF_METAINFO); puts(xfrm_msg); + } } else { if (one->mode != two->mode) { + color_diff(o->color_diff, DIFF_METAINFO); printf("old mode %06o\n", one->mode); + color_diff(o->color_diff, DIFF_METAINFO); printf("new mode %06o\n", two->mode); } - if (xfrm_msg && xfrm_msg[0]) + if (xfrm_msg && xfrm_msg[0]) { + color_diff(o->color_diff, DIFF_METAINFO); puts(xfrm_msg); + } /* * we do not run diff between different kind * of objects. @@ -575,6 +630,7 @@ static void builtin_diff(const char *name_a, if ((one->mode ^ two->mode) & S_IFMT) goto free_ab_and_return; if (complete_rewrite) { + color_diff(o->color_diff, DIFF_PLAIN); emit_rewrite_diff(name_a, name_b, one, two); goto free_ab_and_return; } @@ -602,7 +658,9 @@ static void builtin_diff(const char *name_a, xdemitcb_t ecb; struct emit_callback ecbdata; + memset(&ecbdata, 0, sizeof(ecbdata)); ecbdata.label_path = lbl; + ecbdata.color_diff = o->color_diff; xpp.flags = XDF_NEED_MINIMAL; xecfg.ctxlen = o->context; xecfg.flags = XDL_EMIT_FUNCNAMES; @@ -612,8 +670,9 @@ static void builtin_diff(const char *name_a, xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10); else if (!strncmp(diffopts, "-u", 2)) xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10); - ecb.outf = fn_out; + ecb.outf = xdiff_outf; ecb.priv = &ecbdata; + ecbdata.xm.consume = fn_out_consume; xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); } @@ -1456,6 +1515,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) else if (40 < options->abbrev) options->abbrev = 40; } + else if (!strcmp(arg, "--color")) + options->color_diff = 1; else return 0; return 1; |