reflog expire: prune commits that are not incomplete

diff --git a/builtin-show-branch.c b/builtin-show-branch.c
index 5d6ce568360629f3844513b81f97e4412002b88b..b9d9781d4d6a12860d377607369a4dea95a3c7be 100644 (file)
--- a/builtin-show-branch.c
+++ b/builtin-show-branch.c
@@ -1,12 +1,10 @@
-#include <stdlib.h>
-#include <fnmatch.h>
 #include "cache.h"
 #include "commit.h"
 #include "refs.h"
 #include "builtin.h"
 
 static const char show_branch_usage[] =
-"git-show-branch [--sparse] [--current] [--all] [--heads] [--tags] [--topo-order] [--more=count | --list | --independent | --merge-base ] [--topics] [<refs>...]";
+"git-show-branch [--sparse] [--current] [--all] [--heads] [--tags] [--topo-order] [--more=count | --list | --independent | --merge-base ] [--topics] [<refs>...] | --reflog[=n] <branch>";
 
 static int default_num;
 static int default_alloc;
@@ -17,6 +15,8 @@ static const char **default_arg;
 #define REV_SHIFT       2
 #define MAX_REVS       (FLAG_BITS - REV_SHIFT) /* should not exceed bits_per_int - REV_SHIFT */
 
+#define DEFAULT_REFLOG 4
+
 static struct commit *interesting(struct commit_list *list)
 {
        while (list) {
@@ -443,6 +443,12 @@ 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))
+               head += 11;
+       if (!strncmp(name, "refs/heads/", 11))
+               name += 11;
+       else if (!strncmp(name, "heads/", 6))
+               name += 6;
        return !strcmp(head, name);
 }
 
@@ -564,6 +570,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
        int head_at = -1;
        int topics = 0;
        int dense = 1;
+       int reflog = 0;
 
        git_config(git_show_branch_config);
 
@@ -609,6 +616,15 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                        dense = 0;
                else if (!strcmp(arg, "--date-order"))
                        lifo = 0;
+               else if (!strcmp(arg, "--reflog")) {
+                       reflog = DEFAULT_REFLOG;
+               }
+               else if (!strncmp(arg, "--reflog=", 9)) {
+                       char *end;
+                       reflog = strtoul(arg + 9, &end, 10);
+                       if (*end != '\0')
+                               die("unrecognized reflog count '%s'", arg + 9);
+               }
                else
                        usage(show_branch_usage);
                ac--; av++;
@@ -616,7 +632,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
        ac--; av++;
 
        /* Only one of these is allowed */
-       if (1 < independent + merge_base + (extra != 0))
+       if (1 < independent + merge_base + (extra != 0) + (!!reflog))
                usage(show_branch_usage);
 
        /* If nothing is specified, show all branches by default */
@@ -625,9 +641,22 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 
        if (all_heads + all_tags)
                snarf_refs(all_heads, all_tags);
-       while (0 < ac) {
-               append_one_rev(*av);
-               ac--; av++;
+       if (reflog) {
+               int reflen;
+               if (!ac)
+                       die("--reflog option needs one branch name");
+               reflen = strlen(*av);
+               for (i = 0; i < reflog; i++) {
+                       char *name = xmalloc(reflen + 20);
+                       sprintf(name, "%s@{%d}", *av, i);
+                       append_one_rev(name);
+               }
+       }
+       else {
+               while (0 < ac) {
+                       append_one_rev(*av);
+                       ac--; av++;
+               }
        }
 
        head_p = resolve_ref("HEAD", head_sha1, 1, NULL);