expose a helper function peel_to_type().

diff --git a/builtin-show-branch.c b/builtin-show-branch.c
index 0d94e40df893ee6ecf146e8987c0696cb4874a36..019abd3527e7c573c69900a58313749e2ef2280a 100644 (file)
--- a/builtin-show-branch.c
+++ b/builtin-show-branch.c
@@ -259,17 +259,18 @@ static void join_revs(struct commit_list **list_p,
 
 static void show_one_commit(struct commit *commit, int no_name)
 {
-       char pretty[256], *cp;
+       struct strbuf pretty;
+       const char *pretty_str = "(unavailable)";
        struct commit_name *name = commit->util;
-       if (commit->object.parsed)
-               pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
-                                   pretty, sizeof(pretty), 0, NULL, NULL, 0);
-       else
-               strcpy(pretty, "(unavailable)");
-       if (!strncmp(pretty, "[PATCH] ", 8))
-               cp = pretty + 8;
-       else
-               cp = pretty;
+
+       strbuf_init(&pretty, 0);
+       if (commit->object.parsed) {
+               pretty_print_commit(CMIT_FMT_ONELINE, commit,
+                                   &pretty, 0, NULL, NULL, 0, 0);
+               pretty_str = pretty.buf;
+       }
+       if (!prefixcmp(pretty_str, "[PATCH] "))
+               pretty_str += 8;
 
        if (!no_name) {
                if (name && name->head_name) {
@@ -286,7 +287,8 @@ static void show_one_commit(struct commit *commit, int no_name)
                        printf("[%s] ",
                               find_unique_abbrev(commit->object.sha1, 7));
        }
-       puts(cp);
+       puts(pretty_str);
+       strbuf_release(&pretty);
 }
 
 static char *ref_name[MAX_REVS + 1];
@@ -378,7 +380,7 @@ 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 +394,7 @@ 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 +406,7 @@ 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 +437,9 @@ 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 +464,11 @@ 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);
 }
@@ -534,6 +536,8 @@ static void append_one_rev(const char *av)
 static int git_show_branch_config(const char *var, const char *value)
 {
        if (!strcmp(var, "showbranch.default")) {
+               if (!value)
+                       return config_error_nonbool(var);
                if (default_alloc <= default_num + 1) {
                        default_alloc = default_alloc * 3 / 2 + 20;
                        default_arg = xrealloc(default_arg, sizeof *default_arg * default_alloc);
@@ -635,7 +639,7 @@ 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 +656,9 @@ 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);
@@ -721,7 +725,8 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                }
 
                for (i = 0; i < reflog; i++) {
-                       char *logmsg, *msg, *m;
+                       char *logmsg, *m;
+                       const char *msg;
                        unsigned long timestamp;
                        int tz;