checkout: generalize die_if_checked_out() branch name argument

The plan is to publish die_if_checked_out() so that callers other than
git-checkout can take advantage of it, however, those callers won't have
access to git-checkout's "struct branch_info". Therefore, change it to
accept the full name of the branch as a simple string instead.

While here, also give the argument a more meaningful name ("branch"
instead of "new").

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/checkout.c b/builtin/checkout.c
index c36bf8acfbdec8e668b3c698d4e1aa5346419539..177ad6a2d7c87cb0e9e2f569e05f26a28f78ee6f 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -873,7 +873,7 @@ static const char *unique_tracking_name(const char *name, unsigned char *sha1)
        return NULL;
 }
 
-static void check_linked_checkout(struct branch_info *new, const char *id)
+static void check_linked_checkout(const char *branch, const char *id)
 {
        struct strbuf sb = STRBUF_INIT;
        struct strbuf path = STRBUF_INIT;
@@ -898,7 +898,7 @@ static void check_linked_checkout(struct branch_info *new, const char *id)
        end = start;
        while (*end && !isspace(*end))
                end++;
-       if (strncmp(start, new->path, end - start) || new->path[end - start] != '\0')
+       if (strncmp(start, branch, end - start) || branch[end - start] != '\0')
                goto done;
        if (id) {
                strbuf_reset(&path);
@@ -908,20 +908,21 @@ static void check_linked_checkout(struct branch_info *new, const char *id)
                strbuf_rtrim(&gitdir);
        } else
                strbuf_addstr(&gitdir, get_git_common_dir());
-       die(_("'%s' is already checked out at '%s'"), new->name, gitdir.buf);
+       skip_prefix(branch, "refs/heads/", &branch);
+       die(_("'%s' is already checked out at '%s'"), branch, gitdir.buf);
 done:
        strbuf_release(&path);
        strbuf_release(&sb);
        strbuf_release(&gitdir);
 }
 
-static void die_if_checked_out(struct branch_info *new)
+static void die_if_checked_out(const char *branch)
 {
        struct strbuf path = STRBUF_INIT;
        DIR *dir;
        struct dirent *d;
 
-       check_linked_checkout(new, NULL);
+       check_linked_checkout(branch, NULL);
 
        strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
        dir = opendir(path.buf);
@@ -932,7 +933,7 @@ static void die_if_checked_out(struct branch_info *new)
        while ((d = readdir(dir)) != NULL) {
                if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
                        continue;
-               check_linked_checkout(new, d->d_name);
+               check_linked_checkout(branch, d->d_name);
        }
        closedir(dir);
 }
@@ -1151,7 +1152,7 @@ static int checkout_branch(struct checkout_opts *opts,
                char *head_ref = resolve_refdup("HEAD", 0, sha1, &flag);
                if (head_ref &&
                    (!(flag & REF_ISSYMREF) || strcmp(head_ref, new->path)))
-                       die_if_checked_out(new);
+                       die_if_checked_out(new->path);
                free(head_ref);
        }