difftool: Fix '--gui' when diff.guitool is unconfigured

[git.git] / builtin-revert.c

diff --git a/builtin-revert.c b/builtin-revert.c
index 8ac86f09434d1dad830c924de8cadcef6705e1e5..eff52687a87b45b766e064eede7c2c35b6d133d2 100644 (file)
--- a/builtin-revert.c
+++ b/builtin-revert.c
@@ -38,6 +38,7 @@ static const char * const cherry_pick_usage[] = {
 static int edit, no_replay, no_commit, mainline, signoff;
 static enum { REVERT, CHERRY_PICK } action;
 static struct commit *commit;
+static const char *commit_name;
 static int allow_rerere_auto;
 
 static const char *me;
@@ -49,7 +50,6 @@ static void parse_args(int argc, const char **argv)
        const char * const * usage_str =
                action == REVERT ?  revert_usage : cherry_pick_usage;
        unsigned char sha1[20];
-       const char *arg;
        int noop;
        struct option options[] = {
                OPT_BOOLEAN('n', "no-commit", &no_commit, "don't automatically commit"),
@@ -64,19 +64,13 @@ static void parse_args(int argc, const char **argv)
 
        if (parse_options(argc, argv, NULL, options, usage_str, 0) != 1)
                usage_with_options(usage_str, options);
-       arg = argv[0];
 
-       if (get_sha1(arg, sha1))
-               die ("Cannot find '%s'", arg);
-       commit = (struct commit *)parse_object(sha1);
+       commit_name = argv[0];
+       if (get_sha1(commit_name, sha1))
+               die ("Cannot find '%s'", commit_name);
+       commit = lookup_commit_reference(sha1);
        if (!commit)
-               die ("Could not find %s", sha1_to_hex(sha1));
-       if (commit->object.type == OBJ_TAG) {
-               commit = (struct commit *)
-                       deref_tag((struct object *)commit, arg, strlen(arg));
-       }
-       if (commit->object.type != OBJ_COMMIT)
-               die ("'%s' does not point to a commit", arg);
+               exit(1);
 }
 
 static char *get_oneline(const char *message)
@@ -204,25 +198,27 @@ static void set_author_ident_env(const char *message)
                        sha1_to_hex(commit->object.sha1));
 }
 
-static char *help_msg(const unsigned char *sha1)
+static char *help_msg(const char *name)
 {
-       static char helpbuf[1024];
+       struct strbuf helpbuf = STRBUF_INIT;
        char *msg = getenv("GIT_CHERRY_PICK_HELP");
 
        if (msg)
                return msg;
 
-       strcpy(helpbuf, "  After resolving the conflicts,\n"
-              "mark the corrected paths with 'git add <paths>' "
-              "or 'git rm <paths>' and commit the result.");
+       strbuf_addstr(&helpbuf, "  After resolving the conflicts,\n"
+               "mark the corrected paths with 'git add <paths>' or 'git rm <paths>'\n"
+               "and commit the result");
 
        if (action == CHERRY_PICK) {
-               sprintf(helpbuf + strlen(helpbuf),
-                       "\nWhen commiting, use the option "
-                       "'-c %s' to retain authorship and message.",
-                       find_unique_abbrev(sha1, DEFAULT_ABBREV));
+               strbuf_addf(&helpbuf, " with: \n"
+                       "\n"
+                       "        git commit -c %s\n",
+                       name);
        }
-       return helpbuf;
+       else
+               strbuf_addch(&helpbuf, '.');
+       return strbuf_detach(&helpbuf, NULL);
 }
 
 static struct tree *empty_tree(void)
@@ -409,7 +405,7 @@ static int revert_or_cherry_pick(int argc, const char **argv)
                if (commit_lock_file(&msg_file) < 0)
                        die ("Error wrapping up %s", defmsg);
                fprintf(stderr, "Automatic %s failed.%s\n",
-                       me, help_msg(commit->object.sha1));
+                       me, help_msg(commit_name));
                rerere(allow_rerere_auto);
                exit(1);
        }