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[thirdparty/git.git] / builtin-show-branch.c

diff --git a/builtin-show-branch.c b/builtin-show-branch.c
index fb1a4000d98e27389904578309b935cbda2a85fe..c67f2fa2fe2203b5308eb156d502b75ce44751d5 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] [--remotes] [--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) {
@@ -383,6 +383,20 @@ static int append_head_ref(const char *refname, const unsigned char *sha1, int f
        return append_ref(refname + ofs, sha1, flag, cb_data);
 }
 
+static int append_remote_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+{
+       unsigned char tmp[20];
+       int ofs = 13;
+       if (strncmp(refname, "refs/remotes/", ofs))
+               return 0;
+       /* If both heads/foo and tags/foo exists, get_sha1 would
+        * get confused.
+        */
+       if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
+               ofs = 5;
+       return append_ref(refname + ofs, sha1, flag, cb_data);
+}
+
 static int append_tag_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 {
        if (strncmp(refname, "refs/tags/", 10))
@@ -423,16 +437,16 @@ static int append_matching_ref(const char *refname, const unsigned char *sha1, i
        return append_ref(refname, sha1, flag, cb_data);
 }
 
-static void snarf_refs(int head, int tag)
+static void snarf_refs(int head, int remotes)
 {
        if (head) {
                int orig_cnt = ref_name_cnt;
                for_each_ref(append_head_ref, NULL);
                sort_ref_range(orig_cnt, ref_name_cnt);
        }
-       if (tag) {
+       if (remotes) {
                int orig_cnt = ref_name_cnt;
-               for_each_ref(append_tag_ref, NULL);
+               for_each_ref(append_remote_ref, NULL);
                sort_ref_range(orig_cnt, ref_name_cnt);
        }
 }
@@ -554,7 +568,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
        struct commit_list *list = NULL, *seen = NULL;
        unsigned int rev_mask[MAX_REVS];
        int num_rev, i, extra = 0;
-       int all_heads = 0, all_tags = 0;
+       int all_heads = 0, all_remotes = 0;
        int all_mask, all_revs;
        int lifo = 1;
        char head[128];
@@ -570,6 +584,7 @@ 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);
 
@@ -585,12 +600,10 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                        ac--; av++;
                        break;
                }
-               else if (!strcmp(arg, "--all"))
-                       all_heads = all_tags = 1;
-               else if (!strcmp(arg, "--heads"))
-                       all_heads = 1;
-               else if (!strcmp(arg, "--tags"))
-                       all_tags = 1;
+               else if (!strcmp(arg, "--all") || !strcmp(arg, "-a"))
+                       all_heads = all_remotes = 1;
+               else if (!strcmp(arg, "--remotes") || !strcmp(arg, "-r"))
+                       all_remotes = 1;
                else if (!strcmp(arg, "--more"))
                        extra = 1;
                else if (!strcmp(arg, "--list"))
@@ -615,6 +628,15 @@ 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++;
@@ -622,18 +644,31 @@ 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 */
-       if (ac + all_heads + all_tags == 0)
+       if (ac + all_heads + all_remotes == 0)
                all_heads = 1;
 
-       if (all_heads + all_tags)
-               snarf_refs(all_heads, all_tags);
-       while (0 < ac) {
-               append_one_rev(*av);
-               ac--; av++;
+       if (all_heads + all_remotes)
+               snarf_refs(all_heads, all_remotes);
+       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);