rebase -i: learn to rebase root commit

diff --git a/builtin-tag.c b/builtin-tag.c
index 11b91b3c3b2289d396c72067f7b3ded2ec6a0b64..a3984998915921476a80839a07b133779ece72f3 100644 (file)
--- a/builtin-tag.c
+++ b/builtin-tag.c
@@ -253,6 +253,15 @@ static void write_tag_body(int fd, const unsigned char *sha1)
        free(buf);
 }
 
+static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
+{
+       if (sign && do_sign(buf) < 0)
+               return error("unable to sign the tag");
+       if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
+               return error("unable to write tag file");
+       return 0;
+}
+
 static void create_tag(const unsigned char *object, const char *tag,
                       struct strbuf *buf, int message, int sign,
                       unsigned char *prev, unsigned char *result)
@@ -260,6 +269,7 @@ static void create_tag(const unsigned char *object, const char *tag,
        enum object_type type;
        char header_buf[1024];
        int header_len;
+       char *path = NULL;
 
        type = sha1_object_info(object, NULL);
        if (type <= OBJ_NONE)
@@ -279,7 +289,6 @@ static void create_tag(const unsigned char *object, const char *tag,
                die("tag header too big.");
 
        if (!message) {
-               char *path;
                int fd;
 
                /* write the template message before editing: */
@@ -300,9 +309,6 @@ static void create_tag(const unsigned char *object, const char *tag,
                        "Please supply the message using either -m or -F option.\n");
                        exit(1);
                }
-
-               unlink(path);
-               free(path);
        }
 
        stripspace(buf, 1);
@@ -312,10 +318,16 @@ static void create_tag(const unsigned char *object, const char *tag,
 
        strbuf_insert(buf, 0, header_buf, header_len);
 
-       if (sign && do_sign(buf) < 0)
-               die("unable to sign the tag");
-       if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
-               die("unable to write tag file");
+       if (build_tag_object(buf, sign, result) < 0) {
+               if (path)
+                       fprintf(stderr, "The tag message has been left in %s\n",
+                               path);
+               exit(128);
+       }
+       if (path) {
+               unlink(path);
+               free(path);
+       }
 }
 
 struct msg_arg {
@@ -338,7 +350,7 @@ static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 
 int cmd_tag(int argc, const char **argv, const char *prefix)
 {
-       struct strbuf buf;
+       struct strbuf buf = STRBUF_INIT;
        unsigned char object[20], prev[20];
        char ref[PATH_MAX];
        const char *object_ref, *tag;
@@ -398,7 +410,6 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
        if (verify)
                return for_each_tag_name(argv, verify_tag);
 
-       strbuf_init(&buf, 0);
        if (msg.given || msgfile) {
                if (msg.given && msgfile)
                        die("only one -F or -m option is allowed.");