worktree: refactor `repair_worktree_after_gitdir_move()`

This refactors `repair_worktree_after_gitdir_move()` to use the new `write_worktree_linking_files` function. It also preserves the relativity of the linking files; e.g., if an existing worktree used absolute paths then the repaired paths will be absolute (and visa-versa). `repair_worktree_after_gitdir_move()` is used to repair both sets of worktree linking files if the `.git` directory is moved during a re-initialization using `git init`. This also adds a test case for reinitializing a repository that has relative worktrees. Signed-off-by: Caleb White <cdwhite3@pm.me> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Caleb White committed Nov 29, 2024 at 22:23 UTC 2037ca85ad93ec905b46543df6df4080f6ca258b
2 files changed +26 -25
t/t0001-init.sh
+18 -4
@@ -434,6 +434,12 @@ test_expect_success SYMLINKS 're-init to move gitdir symlink' '
434 sep_git_dir_worktree () {
435 test_when_finished "rm -rf mainwt linkwt seprepo" &&
436 git init mainwt &&
437 + if test "relative" = $2
438 + then
439 + test_config -C mainwt worktree.useRelativePaths true
440 + else
441 + test_config -C mainwt worktree.useRelativePaths false
442 + fi
443 test_commit -C mainwt gumby &&
444 git -C mainwt worktree add --detach ../linkwt &&
445 git -C "$1" init --separate-git-dir ../seprepo &&
@@ -442,12 +448,20 @@ sep_git_dir_worktree () {
448 test_cmp expect actual
449 }
450
445 -test_expect_success 're-init to move gitdir with linked worktrees' '
446 - sep_git_dir_worktree mainwt
451 +test_expect_success 're-init to move gitdir with linked worktrees (absolute)' '
452 + sep_git_dir_worktree mainwt absolute
453 +'
454 +
455 +test_expect_success 're-init to move gitdir within linked worktree (absolute)' '
456 + sep_git_dir_worktree linkwt absolute
457 +'
458 +
459 +test_expect_success 're-init to move gitdir with linked worktrees (relative)' '
460 + sep_git_dir_worktree mainwt relative
461 '
462
449 -test_expect_success 're-init to move gitdir within linked worktree' '
450 - sep_git_dir_worktree linkwt
463 +test_expect_success 're-init to move gitdir within linked worktree (relative)' '
464 + sep_git_dir_worktree linkwt relative
465 '
466
467 test_expect_success MINGW '.git hidden' '
worktree.c
+8 -21
@@ -651,45 +651,32 @@ void repair_worktrees(worktree_repair_fn fn, void *cb_data, int use_relative_pat
651
652 void repair_worktree_after_gitdir_move(struct worktree *wt, const char *old_path)
653 {
654 - struct strbuf path = STRBUF_INIT;
655 - struct strbuf repo = STRBUF_INIT;
654 struct strbuf gitdir = STRBUF_INIT;
655 struct strbuf dotgit = STRBUF_INIT;
658 - struct strbuf olddotgit = STRBUF_INIT;
659 - struct strbuf tmp = STRBUF_INIT;
656 + int is_relative_path;
657
658 if (is_main_worktree(wt))
659 goto done;
660
664 - strbuf_realpath(&repo, git_common_path("worktrees/%s", wt->id), 1);
665 - strbuf_addf(&gitdir, "%s/gitdir", repo.buf);
661 + strbuf_realpath(&gitdir, git_common_path("worktrees/%s/gitdir", wt->id), 1);
662
667 - if (strbuf_read_file(&olddotgit, gitdir.buf, 0) < 0)
663 + if (strbuf_read_file(&dotgit, gitdir.buf, 0) < 0)
664 goto done;
665
670 - strbuf_rtrim(&olddotgit);
671 - if (is_absolute_path(olddotgit.buf)) {
672 - strbuf_addbuf(&dotgit, &olddotgit);
673 - } else {
674 - strbuf_addf(&dotgit, "%s/worktrees/%s/%s", old_path, wt->id, olddotgit.buf);
666 + strbuf_rtrim(&dotgit);
667 + is_relative_path = ! is_absolute_path(dotgit.buf);
668 + if (is_relative_path) {
669 + strbuf_insertf(&dotgit, 0, "%s/worktrees/%s/", old_path, wt->id);
670 strbuf_realpath_forgiving(&dotgit, dotgit.buf, 0);
671 }
672
673 if (!file_exists(dotgit.buf))
674 goto done;
675
681 - strbuf_addbuf(&path, &dotgit);
682 - strbuf_strip_suffix(&path, "/.git");
683 -
684 - write_file(dotgit.buf, "gitdir: %s", relative_path(repo.buf, path.buf, &tmp));
685 - write_file(gitdir.buf, "%s", relative_path(dotgit.buf, repo.buf, &tmp));
676 + write_worktree_linking_files(dotgit, gitdir, is_relative_path);
677 done:
687 - strbuf_release(&path);
688 - strbuf_release(&repo);
678 strbuf_release(&gitdir);
679 strbuf_release(&dotgit);
691 - strbuf_release(&olddotgit);
692 - strbuf_release(&tmp);
680 }
681
682 void repair_worktrees_after_gitdir_move(const char *old_path)