diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 64 |
1 files changed, 50 insertions, 14 deletions
@@ -2444,6 +2444,15 @@ static int fn_out_consume(void *priv, char *line, unsigned long len) return 0; } +static int quick_consume(void *priv, char *line UNUSED, unsigned long len UNUSED) +{ + struct emit_callback *ecbdata = priv; + struct diff_options *o = ecbdata->opt; + + o->found_changes = 1; + return 1; +} + static void pprint_rename(struct strbuf *name, const char *a, const char *b) { const char *old_name = a; @@ -3759,8 +3768,21 @@ static void builtin_diff(const char *name_a, if (o->word_diff) init_diff_words_data(&ecbdata, o, one, two); - if (xdi_diff_outf(&mf1, &mf2, NULL, fn_out_consume, - &ecbdata, &xpp, &xecfg)) + if (o->dry_run) { + /* + * Unlike the !dry_run case, we need to ignore the + * return value from xdi_diff_outf() here, because + * xdi_diff_outf() takes non-zero return from its + * callback function as a sign of error and returns + * early (which is why we return non-zero from our + * callback, quick_consume()). Unfortunately, + * xdi_diff_outf() signals an error by returning + * non-zero. + */ + xdi_diff_outf(&mf1, &mf2, NULL, quick_consume, + &ecbdata, &xpp, &xecfg); + } else if (xdi_diff_outf(&mf1, &mf2, NULL, fn_out_consume, + &ecbdata, &xpp, &xecfg)) die("unable to generate diff for %s", one->path); if (o->word_diff) free_diff_words_data(&ecbdata); @@ -6150,6 +6172,22 @@ static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) run_diff(p, o); } +/* return 1 if any change is found; otherwise, return 0 */ +static int diff_flush_patch_quietly(struct diff_filepair *p, struct diff_options *o) +{ + int saved_dry_run = o->dry_run; + int saved_found_changes = o->found_changes; + int ret; + + o->dry_run = 1; + o->found_changes = 0; + diff_flush_patch(p, o); + ret = o->found_changes; + o->dry_run = saved_dry_run; + o->found_changes |= saved_found_changes; + return ret; +} + static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, struct diffstat_t *diffstat) { @@ -6778,8 +6816,15 @@ void diff_flush(struct diff_options *options) 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); + + if (!check_pair_status(p)) + continue; + + if (options->flags.diff_from_contents && + !diff_flush_patch_quietly(p, options)) + continue; + + flush_one_pair(p, options); } separator++; } @@ -6831,19 +6876,10 @@ void diff_flush(struct diff_options *options) if (output_format & DIFF_FORMAT_NO_OUTPUT && options->flags.exit_with_status && options->flags.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. - */ - diff_free_file(options); - options->file = xfopen("/dev/null", "w"); - options->close_file = 1; - options->color_moved = 0; for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; if (check_pair_status(p)) - diff_flush_patch(p, options); + diff_flush_patch_quietly(p, options); if (options->found_changes) break; } |