revision traversal: --author, --committer, and --grep.

This adds three options to setup_revisions(), which lets you
filter resulting commits by the author name, the committer name
and the log message with regexp.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/git-rev-list.txt b/Documentation/git-rev-list.txt
index 28966adbbce60c2d3fa02f47bf0797bc29d32f60..00a95e249fe82f2eb3d53dcc541559dceb3e8709 100644 (file)
--- a/Documentation/git-rev-list.txt
+++ b/Documentation/git-rev-list.txt
@@ -20,6 +20,7 @@ SYNOPSIS
             [ \--stdin ]
             [ \--topo-order ]
             [ \--parents ]
+            [ \--(author|committer|grep)=<pattern> ]
             [ [\--objects | \--objects-edge] [ \--unpacked ] ]
             [ \--pretty | \--header ]
             [ \--bisect ]
@@ -154,6 +155,16 @@ limiting may be applied.
 
        Limit the commits output to specified time range.
 
+--author='pattern', --committer='pattern'::
+
+       Limit the commits output to ones with author/committer
+       header lines that match the specified pattern.
+
+--grep='pattern'::
+
+       Limit the commits output to ones with log message that
+       matches the specified pattern.
+
 --remove-empty::
 
        Stop when a given path disappears from the tree.

diff --git a/revision.c b/revision.c
index a14457a12988cfe05c77096a72d25922d1d30395..26dd41873484fdeed9d2bd4825c1a03e2b2553bc 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -674,6 +674,40 @@ int handle_revision_arg(const char *arg, struct rev_info *revs,
        return 0;
 }
 
+static void add_header_grep(struct rev_info *revs, const char *field, const char *pattern)
+{
+       char *pat;
+       int patlen, fldlen;
+
+       if (!revs->header_filter) {
+               struct grep_opt *opt = xcalloc(1, sizeof(*opt));
+               opt->status_only = 1;
+               opt->pattern_tail = &(opt->pattern_list);
+               opt->regflags = REG_NEWLINE;
+               revs->header_filter = opt;
+       }
+
+       fldlen = strlen(field);
+       patlen = strlen(pattern);
+       pat = xmalloc(patlen + fldlen + 3);
+       sprintf(pat, "^%s %s", field, pattern);
+       append_grep_pattern(revs->header_filter, pat,
+                           "command line", 0, GREP_PATTERN);
+}
+
+static void add_message_grep(struct rev_info *revs, const char *pattern)
+{
+       if (!revs->message_filter) {
+               struct grep_opt *opt = xcalloc(1, sizeof(*opt));
+               opt->status_only = 1;
+               opt->pattern_tail = &(opt->pattern_list);
+               opt->regflags = REG_NEWLINE;
+               revs->message_filter = opt;
+       }
+       append_grep_pattern(revs->message_filter, pattern,
+                           "command line", 0, GREP_PATTERN);
+}
+
 static void add_ignore_packed(struct rev_info *revs, const char *name)
 {
        int num = ++revs->num_ignore_packed;
@@ -915,6 +949,18 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                                revs->relative_date = 1;
                                continue;
                        }
+                       if (!strncmp(arg, "--author=", 9)) {
+                               add_header_grep(revs, "author", arg+9);
+                               continue;
+                       }
+                       if (!strncmp(arg, "--committer=", 12)) {
+                               add_header_grep(revs, "committer", arg+12);
+                               continue;
+                       }
+                       if (!strncmp(arg, "--grep=", 7)) {
+                               add_message_grep(revs, arg+7);
+                               continue;
+                       }
                        opts = diff_opt_parse(&revs->diffopt, argv+i, argc-i);
                        if (opts > 0) {
                                revs->diff = 1;
@@ -975,6 +1021,11 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
        if (diff_setup_done(&revs->diffopt) < 0)
                die("diff_setup_done failed");
 
+       if (revs->header_filter)
+               compile_grep_patterns(revs->header_filter);
+       if (revs->message_filter)
+               compile_grep_patterns(revs->message_filter);
+
        return left;
 }
 
@@ -1049,10 +1100,33 @@ static void mark_boundary_to_show(struct commit *commit)
 
 static int commit_match(struct commit *commit, struct rev_info *opt)
 {
+       char *header, *message;
+       unsigned long header_len, message_len;
+
        if (!opt->header_filter && !opt->message_filter)
                return 1;
 
-       /* match it here */
+       header = commit->buffer;
+       message = strstr(header, "\n\n");
+       if (message) {
+               message += 2;
+               header_len = message - header - 1;
+               message_len = strlen(message);
+       }
+       else {
+               header_len = strlen(header);
+               message = header;
+               message_len = 0;
+       }
+
+       if (opt->header_filter &&
+           !grep_buffer(opt->header_filter, NULL, header, header_len))
+               return 0;
+
+       if (opt->message_filter &&
+           !grep_buffer(opt->message_filter, NULL, message, message_len))
+               return 0;
+
        return 1;
 }