Merge branch 'lm/git-blame-el'
[gitweb.git] / builtin / fmt-merge-msg.c
index fb1ebcbe68c2183468a782e068a59143f66366d5..2c4d435da111770bcb3271de4c46e806f3a693b4 100644 (file)
@@ -27,6 +27,8 @@ int fmt_merge_msg_config(const char *key, const char *value, void *cb)
                        merge_log_config = DEFAULT_MERGE_LOG_LEN;
        } else if (!strcmp(key, "merge.branchdesc")) {
                use_branch_desc = git_config_bool(key, value);
+       } else {
+               return git_default_config(key, value, cb);
        }
        return 0;
 }
@@ -223,6 +225,101 @@ static void add_branch_desc(struct strbuf *out, const char *name)
        strbuf_release(&desc);
 }
 
+#define util_as_integral(elem) ((intptr_t)((elem)->util))
+
+static void record_person(int which, struct string_list *people,
+                         struct commit *commit)
+{
+       char *name_buf, *name, *name_end;
+       struct string_list_item *elem;
+       const char *field = (which == 'a') ? "\nauthor " : "\ncommitter ";
+
+       name = strstr(commit->buffer, field);
+       if (!name)
+               return;
+       name += strlen(field);
+       name_end = strchrnul(name, '<');
+       if (*name_end)
+               name_end--;
+       while (isspace(*name_end) && name <= name_end)
+               name_end--;
+       if (name_end < name)
+               return;
+       name_buf = xmemdupz(name, name_end - name + 1);
+
+       elem = string_list_lookup(people, name_buf);
+       if (!elem) {
+               elem = string_list_insert(people, name_buf);
+               elem->util = (void *)0;
+       }
+       elem->util = (void*)(util_as_integral(elem) + 1);
+       free(name_buf);
+}
+
+static int cmp_string_list_util_as_integral(const void *a_, const void *b_)
+{
+       const struct string_list_item *a = a_, *b = b_;
+       return util_as_integral(b) - util_as_integral(a);
+}
+
+static void add_people_count(struct strbuf *out, struct string_list *people)
+{
+       if (people->nr == 1)
+               strbuf_addf(out, "%s", people->items[0].string);
+       else if (people->nr == 2)
+               strbuf_addf(out, "%s (%d) and %s (%d)",
+                           people->items[0].string,
+                           (int)util_as_integral(&people->items[0]),
+                           people->items[1].string,
+                           (int)util_as_integral(&people->items[1]));
+       else if (people->nr)
+               strbuf_addf(out, "%s (%d) and others",
+                           people->items[0].string,
+                           (int)util_as_integral(&people->items[0]));
+}
+
+static void credit_people(struct strbuf *out,
+                         struct string_list *them,
+                         int kind)
+{
+       const char *label;
+       const char *me;
+
+       if (kind == 'a') {
+               label = "\n# By ";
+               me = git_author_info(IDENT_NO_DATE);
+       } else {
+               label = "\n# Via ";
+               me = git_committer_info(IDENT_NO_DATE);
+       }
+
+       if (!them->nr ||
+           (them->nr == 1 &&
+            me &&
+            (me = skip_prefix(me, them->items->string)) != NULL &&
+            skip_prefix(me, " <")))
+               return;
+       strbuf_addstr(out, label);
+       add_people_count(out, them);
+}
+
+static void add_people_info(struct strbuf *out,
+                           struct string_list *authors,
+                           struct string_list *committers)
+{
+       if (authors->nr)
+               qsort(authors->items,
+                     authors->nr, sizeof(authors->items[0]),
+                     cmp_string_list_util_as_integral);
+       if (committers->nr)
+               qsort(committers->items,
+                     committers->nr, sizeof(committers->items[0]),
+                     cmp_string_list_util_as_integral);
+
+       credit_people(out, authors, 'a');
+       credit_people(out, committers, 'c');
+}
+
 static void shortlog(const char *name,
                     struct origin_data *origin_data,
                     struct commit *head,
@@ -233,6 +330,8 @@ static void shortlog(const char *name,
        struct commit *commit;
        struct object *branch;
        struct string_list subjects = STRING_LIST_INIT_DUP;
+       struct string_list authors = STRING_LIST_INIT_DUP;
+       struct string_list committers = STRING_LIST_INIT_DUP;
        int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
        struct strbuf sb = STRBUF_INIT;
        const unsigned char *sha1 = origin_data->sha1;
@@ -242,7 +341,6 @@ static void shortlog(const char *name,
                return;
 
        setup_revisions(0, NULL, rev, NULL);
-       rev->ignore_merges = 1;
        add_pending_object(rev, branch, name);
        add_pending_object(rev, &head->object, "^HEAD");
        head->object.flags |= UNINTERESTING;
@@ -251,10 +349,15 @@ static void shortlog(const char *name,
        while ((commit = get_revision(rev)) != NULL) {
                struct pretty_print_context ctx = {0};
 
-               /* ignore merges */
-               if (commit->parents && commit->parents->next)
+               if (commit->parents && commit->parents->next) {
+                       /* do not list a merge but count committer */
+                       record_person('c', &committers, commit);
                        continue;
-
+               }
+               if (!count)
+                       /* the 'tip' committer */
+                       record_person('c', &committers, commit);
+               record_person('a', &authors, commit);
                count++;
                if (subjects.nr > limit)
                        continue;
@@ -269,6 +372,7 @@ static void shortlog(const char *name,
                        string_list_append(&subjects, strbuf_detach(&sb, NULL));
        }
 
+       add_people_info(out, &authors, &committers);
        if (count > limit)
                strbuf_addf(out, "\n* %s: (%d commits)\n", name, count);
        else
@@ -289,6 +393,8 @@ static void shortlog(const char *name,
        rev->commits = NULL;
        rev->pending.nr = 0;
 
+       string_list_clear(&authors, 0);
+       string_list_clear(&committers, 0);
        string_list_clear(&subjects, 0);
 }