test-reach: test reduce_heads
[gitweb.git] / help.c
diff --git a/help.c b/help.c
index dd35fcc133094e4dc89898463868e89162637076..3ebf0568dba1f20039b6e4d02c18c652078ad2cb 100644 (file)
--- a/help.c
+++ b/help.c
@@ -409,6 +409,90 @@ void list_common_guides_help(void)
        putchar('\n');
 }
 
+struct slot_expansion {
+       const char *prefix;
+       const char *placeholder;
+       void (*fn)(struct string_list *list, const char *prefix);
+       int found;
+};
+
+void list_config_help(int for_human)
+{
+       struct slot_expansion slot_expansions[] = {
+               { "advice", "*", list_config_advices },
+               { "color.branch", "<slot>", list_config_color_branch_slots },
+               { "color.decorate", "<slot>", list_config_color_decorate_slots },
+               { "color.diff", "<slot>", list_config_color_diff_slots },
+               { "color.grep", "<slot>", list_config_color_grep_slots },
+               { "color.interactive", "<slot>", list_config_color_interactive_slots },
+               { "color.status", "<slot>", list_config_color_status_slots },
+               { "fsck", "<msg-id>", list_config_fsck_msg_ids },
+               { "receive.fsck", "<msg-id>", list_config_fsck_msg_ids },
+               { NULL, NULL, NULL }
+       };
+       const char **p;
+       struct slot_expansion *e;
+       struct string_list keys = STRING_LIST_INIT_DUP;
+       int i;
+
+       for (p = config_name_list; *p; p++) {
+               const char *var = *p;
+               struct strbuf sb = STRBUF_INIT;
+
+               for (e = slot_expansions; e->prefix; e++) {
+
+                       strbuf_reset(&sb);
+                       strbuf_addf(&sb, "%s.%s", e->prefix, e->placeholder);
+                       if (!strcasecmp(var, sb.buf)) {
+                               e->fn(&keys, e->prefix);
+                               e->found++;
+                               break;
+                       }
+               }
+               strbuf_release(&sb);
+               if (!e->prefix)
+                       string_list_append(&keys, var);
+       }
+
+       for (e = slot_expansions; e->prefix; e++)
+               if (!e->found)
+                       BUG("slot_expansion %s.%s is not used",
+                           e->prefix, e->placeholder);
+
+       string_list_sort(&keys);
+       for (i = 0; i < keys.nr; i++) {
+               const char *var = keys.items[i].string;
+               const char *wildcard, *tag, *cut;
+
+               if (for_human) {
+                       puts(var);
+                       continue;
+               }
+
+               wildcard = strchr(var, '*');
+               tag = strchr(var, '<');
+
+               if (!wildcard && !tag) {
+                       puts(var);
+                       continue;
+               }
+
+               if (wildcard && !tag)
+                       cut = wildcard;
+               else if (!wildcard && tag)
+                       cut = tag;
+               else
+                       cut = wildcard < tag ? wildcard : tag;
+
+               /*
+                * We may produce duplicates, but that's up to
+                * git-completion.bash to handle
+                */
+               printf("%.*s\n", (int)(cut - var), var);
+       }
+       string_list_clear(&keys, 0);
+}
+
 void list_all_cmds_help(void)
 {
        print_cmd_by_category(main_categories);