This function is later used by "worktree move" and "worktree remove"
to ensure that we have a good connection between the repository and
the worktree. For example, if a worktree is moved manually, the
worktree location recorded in $GIT_DIR/worktrees/.../gitdir is
incorrect and we should not move that one.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
worktree.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
worktree.h | 5 +++++
2 files changed, 71 insertions(+)
diff --git a/worktree.c b/worktree.c
index bae787cf8d..40cc031ac9 100644
--- a/worktree.c
+++ b/worktree.c
@@ -294,6 +294,72 @@ const char *is_worktree_locked(struct worktree *wt)
return wt->lock_reason;
}
+static int report(int quiet, const char *fmt, ...)
+{
+ va_list params;
+
+ if (quiet)
+ return -1;
+
+ va_start(params, fmt);
+ vfprintf(stderr, fmt, params);
+ fputc('\n', stderr);
+ va_end(params);
+ return -1;
+}
+
+int validate_worktree(const struct worktree *wt, int quiet)
+{
+ struct strbuf sb = STRBUF_INIT;
+ char *path;
+ int err, ret;
+
+ if (is_main_worktree(wt)) {
+ /*
+ * Main worktree using .git file to point to the
+ * repository would make it impossible to know where
+ * the actual worktree is if this function is executed
+ * from another worktree. No .git file support for now.
+ */
+ strbuf_addf(&sb, "%s/.git", wt->path);
+ if (!is_directory(sb.buf)) {
+ strbuf_release(&sb);
+ return report(quiet, _("'%s/.git' at main worktree is not the repository directory"),
+ wt->path);
+ }
+ return 0;
+ }
+
+ /*
+ * Make sure "gitdir" file points to a real .git file and that
+ * file points back here.
+ */
+ if (!is_absolute_path(wt->path))
+ return report(quiet, _("'%s' file does not contain absolute path to the worktree location"),
+ git_common_path("worktrees/%s/gitdir", wt->id));
+
+ strbuf_addf(&sb, "%s/.git", wt->path);
+ if (!file_exists(sb.buf)) {
+ strbuf_release(&sb);
+ return report(quiet, _("'%s/.git' does not exist"), wt->path);
+ }
+
+ path = xstrdup_or_null(read_gitfile_gently(sb.buf, &err));
+ strbuf_release(&sb);
+ if (!path)
+ return report(quiet, _("'%s/.git' is not a .git file, error code %d"),
+ wt->path, err);
+
+ ret = fspathcmp(path, real_path(git_common_path("worktrees/%s", wt->id)));
+ free(path);
+
+ if (ret)
+ return report(quiet, _("'%s' does not point back to '%s'"),
+ wt->path, git_common_path("worktrees/%s", wt->id));
+
+ return 0;
+}
+
int is_worktree_being_rebased(const struct worktree *wt,
const char *target)
{
diff --git a/worktree.h b/worktree.h
index 6bfb985203..33f7405e33 100644
--- a/worktree.h
+++ b/worktree.h
@@ -58,6 +58,11 @@ extern int is_main_worktree(const struct worktree *wt);
extern const char *is_worktree_locked(struct worktree *wt);
/*
+ * Return zero if the worktree is in good condition.
+ */
+extern int validate_worktree(const struct worktree *wt, int quiet);
+
+/*
* Free up the memory for worktree(s)
*/
extern void free_worktrees(struct worktree **);
--
2.11.0.157.gd943d85