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authorEric Sunshine <sunshine@sunshineco.com>2015-07-17 19:00:04 -0400
committerJunio C Hamano <gitster@pobox.com>2015-07-20 11:29:24 -0700
commited89f84b3c05d6359aba842e245910c996d91859 (patch)
tree3972049b8bae8865590f68c2a74d9df244e21193 /branch.c
parent746bbdc64f1e1b2618cd71e5da81e38aa772e8ba (diff)
downloadgit-ed89f84b3c05d6359aba842e245910c996d91859.tar.gz
branch: publish die_if_checked_out()
git-worktree currently conflates new branch creation, setting of HEAD in the new wortkree, and worktree population into a single sub-invocation of git-checkout. However, these operations will eventually be separated, and git-worktree itself will need to be able to detect if the branch is already checked out elsewhere, rather than relying upon git-branch to make this determination, so publish die_if_checked_out(). Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'branch.c')
-rw-r--r--branch.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/branch.c b/branch.c
index 4bab55a9a8..af9480f25a 100644
--- a/branch.c
+++ b/branch.c
@@ -309,3 +309,70 @@ void remove_branch_state(void)
unlink(git_path("MERGE_MODE"));
unlink(git_path("SQUASH_MSG"));
}
+
+static void check_linked_checkout(const char *branch, const char *id)
+{
+ struct strbuf sb = STRBUF_INIT;
+ struct strbuf path = STRBUF_INIT;
+ struct strbuf gitdir = STRBUF_INIT;
+
+ /*
+ * $GIT_COMMON_DIR/HEAD is practically outside
+ * $GIT_DIR so resolve_ref_unsafe() won't work (it
+ * uses git_path). Parse the ref ourselves.
+ */
+ if (id)
+ strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
+ else
+ strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
+
+ if (!strbuf_readlink(&sb, path.buf, 0)) {
+ if (!starts_with(sb.buf, "refs/") ||
+ check_refname_format(sb.buf, 0))
+ goto done;
+ } else if (strbuf_read_file(&sb, path.buf, 0) >= 0 &&
+ starts_with(sb.buf, "ref:")) {
+ strbuf_remove(&sb, 0, strlen("ref:"));
+ strbuf_trim(&sb);
+ } else
+ goto done;
+ if (strcmp(sb.buf, branch))
+ goto done;
+ if (id) {
+ strbuf_reset(&path);
+ strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id);
+ if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
+ goto done;
+ strbuf_rtrim(&gitdir);
+ } else
+ strbuf_addstr(&gitdir, get_git_common_dir());
+ skip_prefix(branch, "refs/heads/", &branch);
+ strbuf_strip_suffix(&gitdir, ".git");
+ die(_("'%s' is already checked out at '%s'"), branch, gitdir.buf);
+done:
+ strbuf_release(&path);
+ strbuf_release(&sb);
+ strbuf_release(&gitdir);
+}
+
+void die_if_checked_out(const char *branch)
+{
+ struct strbuf path = STRBUF_INIT;
+ DIR *dir;
+ struct dirent *d;
+
+ check_linked_checkout(branch, NULL);
+
+ strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
+ dir = opendir(path.buf);
+ strbuf_release(&path);
+ if (!dir)
+ return;
+
+ while ((d = readdir(dir)) != NULL) {
+ if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+ continue;
+ check_linked_checkout(branch, d->d_name);
+ }
+ closedir(dir);
+}