Submodules contains .git files with relative paths. After a worktree
move, these files need to be updated or they may point to nowhere.
This is a bandage patch to make sure "worktree move" don't break
people's worktrees by accident. When .git file update code is in
place, this validate_no_submodules() could be removed.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
Documentation/git-worktree.txt | 2 +-
builtin/worktree.c | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/Documentation/git-worktree.txt b/Documentation/git-worktree.txt
index 4fa1dd3a48..e6764ee8e0 100644
--- a/Documentation/git-worktree.txt
+++ b/Documentation/git-worktree.txt
@@ -79,7 +79,7 @@ with `--reason`.
move::
Move a working tree to a new location. Note that the main working tree
-cannot be moved.
+or linked working trees containing submodules cannot be moved.
prune::
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 6fe41313c9..4789cebe11 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -606,6 +606,27 @@ static int unlock_worktree(int ac, const char **av, const char *prefix)
return ret;
}
+static void validate_no_submodules(const struct worktree *wt)
+{
+ struct index_state istate = { NULL };
+ int i, found_submodules = 0;
+
+ if (read_index_from(&istate, worktree_git_path(wt, "index")) > 0) {
+ for (i = 0; i < istate.cache_nr; i++) {
+ struct cache_entry *ce = istate.cache[i];
+
+ if (S_ISGITLINK(ce->ce_mode)) {
+ found_submodules = 1;
+ break;
+ }
+ }
+ }
+ discard_index(&istate);
+
+ if (found_submodules)
+ die(_("working trees containing submodules cannot be moved"));
+}
+
static int move_worktree(int ac, const char **av, const char *prefix)
{
struct option options[] = {
@@ -643,6 +664,8 @@ static int move_worktree(int ac, const char **av, const char *prefix)
if (file_exists(dst.buf))
die(_("target '%s' already exists"), dst.buf);
+ validate_no_submodules(wt);
+
reason = is_worktree_locked(wt);
if (reason) {
if (*reason)
--
2.16.1.399.g632f88eed1
