git wrapper: Make while loop more reader-friendly

diff --git a/builtin-show-branch.c b/builtin-show-branch.c
index 6dc835d30a6a726c3dd40d23564b0dc32d20b7db..306b850c720ecef7030bd7139f7c7d2758125ac4 100644 (file)
--- a/builtin-show-branch.c
+++ b/builtin-show-branch.c
@@ -4,7 +4,7 @@
 #include "builtin.h"
 
 static const char show_branch_usage[] =
-"git-show-branch [--sparse] [--current] [--all] [--remotes] [--topo-order] [--more=count | --list | --independent | --merge-base ] [--topics] [<refs>...] | --reflog[=n[,b]] <branch>";
+"git show-branch [--sparse] [--current] [--all] [--remotes] [--topo-order] [--more=count | --list | --independent | --merge-base ] [--topics] [<refs>...] | --reflog[=n[,b]] <branch>";
 static const char show_branch_usage_reflog[] =
 "--reflog is incompatible with --all, --remotes, --independent or --merge-base";
 
@@ -259,11 +259,10 @@ static void join_revs(struct commit_list **list_p,
 
 static void show_one_commit(struct commit *commit, int no_name)
 {
-       struct strbuf pretty;
+       struct strbuf pretty = STRBUF_INIT;
        const char *pretty_str = "(unavailable)";
        struct commit_name *name = commit->util;
 
-       strbuf_init(&pretty, 0);
        if (commit->object.parsed) {
                pretty_print_commit(CMIT_FMT_ONELINE, commit,
                                    &pretty, 0, NULL, NULL, 0, 0);
@@ -533,9 +532,11 @@ static void append_one_rev(const char *av)
        die("bad sha1 reference %s", av);
 }
 
-static int git_show_branch_config(const char *var, const char *value)
+static int git_show_branch_config(const char *var, const char *value, void *cb)
 {
        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);
@@ -545,7 +546,7 @@ static int git_show_branch_config(const char *var, const char *value)
                return 0;
        }
 
-       return git_default_config(var, value);
+       return git_default_config(var, value, cb);
 }
 
 static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
@@ -609,7 +610,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
        int reflog = 0;
        const char *reflog_base = NULL;
 
-       git_config(git_show_branch_config);
+       git_config(git_show_branch_config, NULL);
 
        /* If nothing is specified, try the default first */
        if (ac == 1 && default_num) {
@@ -780,8 +781,8 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                                has_head++;
                }
                if (!has_head) {
-                       int pfxlen = strlen("refs/heads/");
-                       append_one_rev(head + pfxlen);
+                       int offset = !prefixcmp(head, "refs/heads/") ? 11 : 0;
+                       append_one_rev(head + offset);
                }
        }