commit 0c48fee25cfbd876833d857ed3810028847225b0
from: Stefan Sperling <stsp@stsp.name>
date: Mon Mar 11 17:15:28 2019 UTC

refuse to create got worktree at a git repo path

commit - 0cd1c46a9e4b3e3a7c7f2947c3eded6fb5439516
commit + 0c48fee25cfbd876833d857ed3810028847225b0
blob - 65ff442b096e36f03c632555fd6def55aea92bc4
blob + 67326beff75d161b6b1590cd639b5563c4349e5a
--- include/got_error.h
+++ include/got_error.h
@@ -79,6 +79,7 @@
 #define GOT_ERR_UUID		63
 #define GOT_ERR_LOCKFILE_TIMEOUT 64
 #define GOT_ERR_BAD_REF_NAME	65
+#define GOT_ERR_WORKTREE_REPO	66
 
 static const struct got_error {
 	int code;
@@ -148,6 +149,7 @@ static const struct got_error {
 	{ GOT_ERR_UUID,		"uuid error" },
 	{ GOT_ERR_LOCKFILE_TIMEOUT,"lockfile timeout" },
 	{ GOT_ERR_BAD_REF_NAME,	"bad reference name" },
+	{ GOT_ERR_WORKTREE_REPO,"cannot create worktree inside a git repository" },
 };
 
 /*
blob - b42d708e36334e931b05947d1446757aa3433d93
blob + 352980fef7bc6bc18f72804c17919ced4a0e94f6
--- lib/worktree.c
+++ lib/worktree.c
@@ -207,6 +207,11 @@ got_worktree_init(const char *path, struct got_referen
 	char *basestr = NULL;
 	char *uuidstr = NULL;
 
+	if (strcmp(path, got_repo_get_path(repo)) == 0) {
+		err = got_error(GOT_ERR_WORKTREE_REPO);
+		goto done;
+	}
+
 	err = got_ref_resolve(&commit_id, repo, head_ref);
 	if (err)
 		return err;