git-svn: gracefully handle --follow-parent failures

diff --git a/builtin-show-branch.c b/builtin-show-branch.c
index 536245e7d3815c087906b56d2af503fa8e4451a9..67ae6bacda6edda2e36b974c0d36b4611ef1a9a6 100644 (file)
--- a/builtin-show-branch.c
+++ b/builtin-show-branch.c
@@ -266,7 +266,7 @@ static void show_one_commit(struct commit *commit, int no_name)
                                    pretty, sizeof(pretty), 0, NULL, NULL, 0);
        else
                strcpy(pretty, "(unavailable)");
-       if (!strncmp(pretty, "[PATCH] ", 8))
+       if (!prefixcmp(pretty, "[PATCH] "))
                cp = pretty + 8;
        else
                cp = pretty;
@@ -378,7 +378,7 @@ static int append_head_ref(const char *refname, const unsigned char *sha1, int f
 {
        unsigned char tmp[20];
        int ofs = 11;
-       if (strncmp(refname, "refs/heads/", ofs))
+       if (prefixcmp(refname, "refs/heads/"))
                return 0;
        /* If both heads/foo and tags/foo exists, get_sha1 would
         * get confused.
@@ -392,7 +392,7 @@ static int append_remote_ref(const char *refname, const unsigned char *sha1, int
 {
        unsigned char tmp[20];
        int ofs = 13;
-       if (strncmp(refname, "refs/remotes/", ofs))
+       if (prefixcmp(refname, "refs/remotes/"))
                return 0;
        /* If both heads/foo and tags/foo exists, get_sha1 would
         * get confused.
@@ -404,7 +404,7 @@ static int append_remote_ref(const char *refname, const unsigned char *sha1, int
 
 static int append_tag_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 {
-       if (strncmp(refname, "refs/tags/", 10))
+       if (prefixcmp(refname, "refs/tags/"))
                return 0;
        return append_ref(refname + 5, sha1, 0);
 }
@@ -435,9 +435,9 @@ static int append_matching_ref(const char *refname, const unsigned char *sha1, i
                return 0;
        if (fnmatch(match_ref_pattern, tail, 0))
                return 0;
-       if (!strncmp("refs/heads/", refname, 11))
+       if (!prefixcmp(refname, "refs/heads/"))
                return append_head_ref(refname, sha1, flag, cb_data);
-       if (!strncmp("refs/tags/", refname, 10))
+       if (!prefixcmp(refname, "refs/tags/"))
                return append_tag_ref(refname, sha1, flag, cb_data);
        return append_ref(refname, sha1, 0);
 }
@@ -462,11 +462,11 @@ static int rev_is_head(char *head, int headlen, char *name,
        if ((!head[0]) ||
            (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
                return 0;
-       if (!strncmp(head, "refs/heads/", 11))
+       if (!prefixcmp(head, "refs/heads/"))
                head += 11;
-       if (!strncmp(name, "refs/heads/", 11))
+       if (!prefixcmp(name, "refs/heads/"))
                name += 11;
-       else if (!strncmp(name, "heads/", 6))
+       else if (!prefixcmp(name, "heads/"))
                name += 6;
        return !strcmp(head, name);
 }
@@ -635,7 +635,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                        with_current_branch = 1;
                else if (!strcmp(arg, "--sha1-name"))
                        sha1_name = 1;
-               else if (!strncmp(arg, "--more=", 7))
+               else if (!prefixcmp(arg, "--more="))
                        extra = atoi(arg + 7);
                else if (!strcmp(arg, "--merge-base"))
                        merge_base = 1;
@@ -652,9 +652,9 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                else if (!strcmp(arg, "--reflog") || !strcmp(arg, "-g")) {
                        reflog = DEFAULT_REFLOG;
                }
-               else if (!strncmp(arg, "--reflog=", 9))
+               else if (!prefixcmp(arg, "--reflog="))
                        parse_reflog_param(arg + 9, &reflog, &reflog_base);
-               else if (!strncmp(arg, "-g=", 3))
+               else if (!prefixcmp(arg, "-g="))
                        parse_reflog_param(arg + 3, &reflog, &reflog_base);
                else
                        usage(show_branch_usage);
@@ -662,13 +662,13 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
        }
        ac--; av++;
 
-       if (!!extra || !!reflog) {
+       if (extra || reflog) {
                /* "listing" mode is incompatible with
                 * independent nor merge-base modes.
                 */
                if (independent || merge_base)
                        usage(show_branch_usage);
-               if (!!reflog && ((0 < extra) || all_heads || all_remotes))
+               if (reflog && ((0 < extra) || all_heads || all_remotes))
                        /*
                         * Asking for --more in reflog mode does not
                         * make sense.  --list is Ok.
@@ -682,15 +682,25 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
        if (ac + all_heads + all_remotes == 0)
                all_heads = 1;
 
-       if (all_heads + all_remotes)
-               snarf_refs(all_heads, all_remotes);
        if (reflog) {
                unsigned char sha1[20];
                char nth_desc[256];
                char *ref;
                int base = 0;
+
+               if (ac == 0) {
+                       static const char *fake_av[2];
+                       const char *refname;
+
+                       refname = resolve_ref("HEAD", sha1, 1, NULL);
+                       fake_av[0] = xstrdup(refname);
+                       fake_av[1] = NULL;
+                       av = fake_av;
+                       ac = 1;
+               }
                if (ac != 1)
                        die("--reflog option needs one branch name");
+
                if (MAX_REVS < reflog)
                        die("Only %d entries can be shown at one time.",
                            MAX_REVS);
@@ -735,6 +745,8 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                        append_ref(nth_desc, sha1, 1);
                }
        }
+       else if (all_heads + all_remotes)
+               snarf_refs(all_heads, all_remotes);
        else {
                while (0 < ac) {
                        append_one_rev(*av);