diff options
| -rw-r--r-- | Documentation/diff-options.txt | 6 | ||||
| -rw-r--r-- | diff.c | 9 | ||||
| -rw-r--r-- | diff.h | 3 | ||||
| -rw-r--r-- | diffcore-pickaxe.c | 150 |
4 files changed, 164 insertions, 4 deletions
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt index 4656a97e60..f77a0f8749 100644 --- a/Documentation/diff-options.txt +++ b/Documentation/diff-options.txt @@ -284,8 +284,12 @@ ifndef::git-format-patch[] appearing in diff output; see the 'pickaxe' entry in linkgit:gitdiffcore[7] for more details. +-G<regex>:: + Look for differences whose added or removed line matches + the given <regex>. + --pickaxe-all:: - When `-S` finds a change, show all the changes in that + When `-S` or `-G` finds a change, show all the changes in that changeset, not just the files that contain the change in <string>. @@ -3268,12 +3268,17 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) } 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; + options->pickaxe_opts |= DIFF_PICKAXE_ALL; else if (!strcmp(arg, "--pickaxe-regex")) - options->pickaxe_opts = DIFF_PICKAXE_REGEX; + options->pickaxe_opts |= DIFF_PICKAXE_REGEX; else if ((argcount = short_opt('O', av, &optarg))) { options->orderfile = optarg; return argcount; @@ -238,6 +238,9 @@ extern int diff_setup_done(struct diff_options *); #define DIFF_PICKAXE_ALL 1 #define DIFF_PICKAXE_REGEX 2 +#define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */ +#define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */ + extern void diffcore_std(struct diff_options *); extern void diffcore_fix_diff_index(struct diff_options *); diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c index 13f61fbb08..84195e47aa 100644 --- a/diffcore-pickaxe.c +++ b/diffcore-pickaxe.c @@ -1,9 +1,148 @@ /* * Copyright (C) 2005 Junio C Hamano + * Copyright (C) 2010 Google Inc. */ #include "cache.h" #include "diff.h" #include "diffcore.h" +#include "xdiff-interface.h" + +struct diffgrep_cb { + regex_t *regexp; + int hit; +}; + +static void diffgrep_consume(void *priv, char *line, unsigned long len) +{ + struct diffgrep_cb *data = priv; + regmatch_t regmatch; + int hold; + + if (line[0] != '+' && line[0] != '-') + return; + if (data->hit) + /* + * NEEDSWORK: we should have a way to terminate the + * caller early. + */ + return; + /* Yuck -- line ought to be "const char *"! */ + hold = line[len]; + line[len] = '\0'; + data->hit = !regexec(data->regexp, line + 1, 1, ®match, 0); + line[len] = hold; +} + +static void fill_one(struct diff_filespec *one, + mmfile_t *mf, struct userdiff_driver **textconv) +{ + if (DIFF_FILE_VALID(one)) { + *textconv = get_textconv(one); + mf->size = fill_textconv(*textconv, one, &mf->ptr); + } else { + memset(mf, 0, sizeof(*mf)); + } +} + +static int diff_grep(struct diff_filepair *p, regex_t *regexp, struct diff_options *o) +{ + regmatch_t regmatch; + struct userdiff_driver *textconv_one = NULL; + struct userdiff_driver *textconv_two = NULL; + mmfile_t mf1, mf2; + int hit; + + if (diff_unmodified_pair(p)) + return 0; + + fill_one(p->one, &mf1, &textconv_one); + fill_one(p->two, &mf2, &textconv_two); + + if (!mf1.ptr) { + if (!mf2.ptr) + return 0; /* ignore unmerged */ + /* created "two" -- does it have what we are looking for? */ + hit = !regexec(regexp, p->two->data, 1, ®match, 0); + } else if (!mf2.ptr) { + /* removed "one" -- did it have what we are looking for? */ + hit = !regexec(regexp, p->one->data, 1, ®match, 0); + } else { + /* + * We have both sides; need to run textual diff and see if + * the pattern appears on added/deleted lines. + */ + struct diffgrep_cb ecbdata; + xpparam_t xpp; + xdemitconf_t xecfg; + + memset(&xpp, 0, sizeof(xpp)); + memset(&xecfg, 0, sizeof(xecfg)); + ecbdata.regexp = regexp; + ecbdata.hit = 0; + xecfg.ctxlen = o->context; + xecfg.interhunkctxlen = o->interhunkcontext; + xdi_diff_outf(&mf1, &mf2, diffgrep_consume, &ecbdata, + &xpp, &xecfg); + hit = ecbdata.hit; + } + if (textconv_one) + free(mf1.ptr); + if (textconv_two) + free(mf2.ptr); + return hit; +} + +static void diffcore_pickaxe_grep(struct diff_options *o) +{ + struct diff_queue_struct *q = &diff_queued_diff; + int i, has_changes, err; + regex_t regex; + struct diff_queue_struct outq; + outq.queue = NULL; + outq.nr = outq.alloc = 0; + + err = regcomp(®ex, o->pickaxe, REG_EXTENDED | REG_NEWLINE); + if (err) { + char errbuf[1024]; + regerror(err, ®ex, errbuf, 1024); + regfree(®ex); + die("invalid log-grep regex: %s", errbuf); + } + + if (o->pickaxe_opts & DIFF_PICKAXE_ALL) { + /* Showing the whole changeset if needle exists */ + for (i = has_changes = 0; !has_changes && i < q->nr; i++) { + struct diff_filepair *p = q->queue[i]; + if (diff_grep(p, ®ex, o)) + has_changes++; + } + if (has_changes) + return; /* do not munge the queue */ + + /* + * 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 { + /* Showing only the filepairs that has the needle */ + for (i = 0; i < q->nr; i++) { + struct diff_filepair *p = q->queue[i]; + if (diff_grep(p, ®ex, o)) + diff_q(&outq, p); + else + diff_free_filepair(p); + } + } + + regfree(®ex); + + free(q->queue); + *q = outq; + return; +} static unsigned int contains(struct diff_filespec *one, const char *needle, unsigned long len, @@ -48,7 +187,7 @@ static unsigned int contains(struct diff_filespec *one, return cnt; } -void diffcore_pickaxe(struct diff_options *o) +static void diffcore_pickaxe_count(struct diff_options *o) { const char *needle = o->pickaxe; int opts = o->pickaxe_opts; @@ -138,3 +277,12 @@ void diffcore_pickaxe(struct diff_options *o) *q = outq; return; } + +void diffcore_pickaxe(struct diff_options *o) +{ + /* Might want to warn when both S and G are on; I don't care... */ + if (o->pickaxe_opts & DIFF_PICKAXE_KIND_G) + return diffcore_pickaxe_grep(o); + else + return diffcore_pickaxe_count(o); +} |