docs/git-tag: explain lightweight versus annotated tags

diff --git a/sequencer.c b/sequencer.c
index bd626806d64b9cd9a814f062d092501315546bdf..73c396bd89bb476dabec60f7e52f8e6857f725d7 100644 (file)
--- a/sequencer.c
+++ b/sequencer.c
@@ -17,7 +17,9 @@
 
 #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
 
-void remove_sequencer_state(void)
+const char sign_off_header[] = "Signed-off-by: ";
+
+static void remove_sequencer_state(void)
 {
        struct strbuf seq_dir = STRBUF_INIT;
 
@@ -58,7 +60,7 @@ static int get_message(struct commit *commit, struct commit_message *out)
 
        out->reencoded_message = NULL;
        out->message = commit->buffer;
-       if (strcmp(encoding, git_commit_encoding))
+       if (same_encoding(encoding, git_commit_encoding))
                out->reencoded_message = reencode_string(commit->buffer,
                                        git_commit_encoding, encoding);
        if (out->reencoded_message)
@@ -233,6 +235,9 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
                die(_("%s: Unable to write new index file"), action_name(opts));
        rollback_lock_file(&index_lock);
 
+       if (opts->signoff)
+               append_signoff(msgbuf, 0);
+
        if (!clean) {
                int i;
                strbuf_addstr(msgbuf, "\nConflicts:\n");
@@ -311,6 +316,9 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts,
        if (allow_empty)
                argv_array_push(&array, "--allow-empty");
 
+       if (opts->allow_empty_message)
+               argv_array_push(&array, "--allow-empty-message");
+
        rc = run_command_v_opt(array.argv, RUN_GIT_CMD);
        argv_array_clear(&array);
        return rc;
@@ -1008,3 +1016,63 @@ int sequencer_pick_revisions(struct replay_opts *opts)
        save_opts(opts);
        return pick_commits(todo_list, opts);
 }
+
+static int ends_rfc2822_footer(struct strbuf *sb, int ignore_footer)
+{
+       int ch;
+       int hit = 0;
+       int i, j, k;
+       int len = sb->len - ignore_footer;
+       int first = 1;
+       const char *buf = sb->buf;
+
+       for (i = len - 1; i > 0; i--) {
+               if (hit && buf[i] == '\n')
+                       break;
+               hit = (buf[i] == '\n');
+       }
+
+       while (i < len - 1 && buf[i] == '\n')
+               i++;
+
+       for (; i < len; i = k) {
+               for (k = i; k < len && buf[k] != '\n'; k++)
+                       ; /* do nothing */
+               k++;
+
+               if ((buf[k] == ' ' || buf[k] == '\t') && !first)
+                       continue;
+
+               first = 0;
+
+               for (j = 0; i + j < len; j++) {
+                       ch = buf[i + j];
+                       if (ch == ':')
+                               break;
+                       if (isalnum(ch) ||
+                           (ch == '-'))
+                               continue;
+                       return 0;
+               }
+       }
+       return 1;
+}
+
+void append_signoff(struct strbuf *msgbuf, int ignore_footer)
+{
+       struct strbuf sob = STRBUF_INIT;
+       int i;
+
+       strbuf_addstr(&sob, sign_off_header);
+       strbuf_addstr(&sob, fmt_name(getenv("GIT_COMMITTER_NAME"),
+                               getenv("GIT_COMMITTER_EMAIL")));
+       strbuf_addch(&sob, '\n');
+       for (i = msgbuf->len - 1 - ignore_footer; i > 0 && msgbuf->buf[i - 1] != '\n'; i--)
+               ; /* do nothing */
+       if (prefixcmp(msgbuf->buf + i, sob.buf)) {
+               if (!i || !ends_rfc2822_footer(msgbuf, ignore_footer))
+                       strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, "\n", 1);
+               strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0, sob.buf, sob.len);
+       }
+       strbuf_release(&sob);
+}