git-worktree will eventually be retrofitted to populate the new worktree
via "git reset --hard" rather than "git checkout", at which time it 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 <sunsh...@sunshineco.com>
---
branch.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
branch.h | 7 ++++++
builtin/checkout.c | 65 ------------------------------------------------------
3 files changed, 72 insertions(+), 65 deletions(-)
diff --git a/branch.c b/branch.c
index 4bab55a..7b8b9a3 100644
--- a/branch.c
+++ b/branch.c
@@ -309,3 +309,68 @@ 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;
+ const char *start, *end;
+
+ 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_read_file(&sb, path.buf, 0) < 0 ||
+ !skip_prefix(sb.buf, "ref:", &start))
+ goto done;
+ while (isspace(*start))
+ start++;
+ end = start;
+ while (*end && !isspace(*end))
+ end++;
+ if (strncmp(start, branch, end - start) || branch[end - start] != '\0')
+ 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);
+ 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;
+
+ /*
+ * $GIT_COMMON_DIR/HEAD is practically outside
+ * $GIT_DIR so resolve_ref_unsafe() won't work (it
+ * uses git_path). Parse the ref ourselves.
+ */
+ 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);
+}
diff --git a/branch.h b/branch.h
index 64173ab..58aa45f 100644
--- a/branch.h
+++ b/branch.h
@@ -52,4 +52,11 @@ extern void install_branch_config(int flag, const char
*local, const char *origi
*/
extern int read_branch_desc(struct strbuf *, const char *branch_name);
+/*
+ * Check if a branch is checked out in the main worktree or any linked
+ * worktree and die (with a message describing its checkout location) if
+ * it is.
+ */
+extern void die_if_checked_out(const char *branch);
+
#endif
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 673daa0..4ae895c 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -873,71 +873,6 @@ static const char *unique_tracking_name(const char *name,
unsigned char *sha1)
return NULL;
}
-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;
- const char *start, *end;
-
- 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_read_file(&sb, path.buf, 0) < 0 ||
- !skip_prefix(sb.buf, "ref:", &start))
- goto done;
- while (isspace(*start))
- start++;
- end = start;
- while (*end && !isspace(*end))
- end++;
- if (strncmp(start, branch, end - start) || branch[end - start] != '\0')
- 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);
- 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(const char *branch)
-{
- struct strbuf path = STRBUF_INIT;
- DIR *dir;
- struct dirent *d;
-
- /*
- * $GIT_COMMON_DIR/HEAD is practically outside
- * $GIT_DIR so resolve_ref_unsafe() won't work (it
- * uses git_path). Parse the ref ourselves.
- */
- 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);
-}
-
static int parse_branchname_arg(int argc, const char **argv,
int dwim_new_local_branch_ok,
struct branch_info *new,
--
2.5.0.rc1.201.ga12d9f8
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