t6200-fmt-merge-msg: Exercise 'merge.log' to configure shortlog length

diff --git a/builtin/merge.c b/builtin/merge.c
index 37ce4f589f6582abf0d1ef5bd263f590a16853d5..1e9c898aec2834577689b430739607a50508498a 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -42,7 +42,7 @@ static const char * const builtin_merge_usage[] = {
        NULL
 };
 
-static int show_diffstat = 1, option_log, squash;
+static int show_diffstat = 1, shortlog_len, squash;
 static int option_commit = 1, allow_fast_forward = 1;
 static int fast_forward_only;
 static int allow_trivial = 1, have_message;
@@ -175,8 +175,9 @@ static struct option builtin_merge_options[] = {
        OPT_BOOLEAN(0, "stat", &show_diffstat,
                "show a diffstat at the end of the merge"),
        OPT_BOOLEAN(0, "summary", &show_diffstat, "(synonym to --stat)"),
-       OPT_BOOLEAN(0, "log", &option_log,
-               "add list of one-line log to merge commit message"),
+       { OPTION_INTEGER, 0, "log", &shortlog_len, "n",
+         "add (at most <n>) entries from shortlog to merge commit message",
+         PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN },
        OPT_BOOLEAN(0, "squash", &squash,
                "create a single commit instead of doing a merge"),
        OPT_BOOLEAN(0, "commit", &option_commit,
@@ -437,7 +438,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
                strbuf_addstr(&truname, "refs/heads/");
                strbuf_addstr(&truname, remote);
                strbuf_setlen(&truname, truname.len - len);
-               if (resolve_ref(truname.buf, buf_sha, 0, NULL)) {
+               if (resolve_ref(truname.buf, buf_sha, 1, NULL)) {
                        strbuf_addf(msg,
                                    "%s\t\tbranch '%s'%s of .\n",
                                    sha1_to_hex(remote_head->sha1),
@@ -501,8 +502,15 @@ static int git_merge_config(const char *k, const char *v, void *cb)
                return git_config_string(&pull_twohead, k, v);
        else if (!strcmp(k, "pull.octopus"))
                return git_config_string(&pull_octopus, k, v);
-       else if (!strcmp(k, "merge.log") || !strcmp(k, "merge.summary"))
-               option_log = git_config_bool(k, v);
+       else if (!strcmp(k, "merge.log") || !strcmp(k, "merge.summary")) {
+               int is_bool;
+               shortlog_len = git_config_bool_or_int(k, v, &is_bool);
+               if (!is_bool && shortlog_len < 0)
+                       return error("%s: negative length %s", k, v);
+               if (is_bool && shortlog_len)
+                       shortlog_len = DEFAULT_MERGE_LOG_LEN;
+               return 0;
+       }
        return git_diff_ui_config(k, v, cb);
 }
 
@@ -998,14 +1006,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                for (i = 0; i < argc; i++)
                        merge_name(argv[i], &merge_names);
 
-               if (have_message && option_log)
-                       fmt_merge_msg_shortlog(&merge_names, &merge_msg);
-               else if (!have_message)
-                       fmt_merge_msg(option_log, &merge_names, &merge_msg);
-
-
-               if (!(have_message && !option_log) && merge_msg.len)
-                       strbuf_setlen(&merge_msg, merge_msg.len-1);
+               if (!have_message || shortlog_len) {
+                       fmt_merge_msg(&merge_names, &merge_msg, !have_message,
+                                     shortlog_len);
+                       if (merge_msg.len)
+                               strbuf_setlen(&merge_msg, merge_msg.len - 1);
+               }
        }
 
        if (head_invalid || !argc)