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bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface
From: |
dick |
Subject: |
bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface |
Date: |
Sat, 12 Mar 2022 16:47:53 -0500 |
>From 793d1311b28701931a9343e5196adce82da7833d Mon Sep 17 00:00:00 2001
From: dickmao <dick.r.chiang@gmail.com>
Date: Sat, 12 Mar 2022 16:39:28 -0500
Subject: [PATCH] Avoid breaking the world's `project-current` calls
mitigate 86969f9.
* lisp/progmodes/project.el (cl-generic, cl-lib):
Rectify the requires
(project-try-vc): Cache the backend outside project "struct."
(project-root): Cache the backend outside project "struct."
(project-files): Cache the backend outside project "struct."
(project-ignores): Cache the backend outside project "struct."
* test/lisp/progmodes/project-tests.el
(project-sparing-backend-discovery): Test it.
---
lisp/progmodes/project.el | 67 ++++++++++++++--------------
test/lisp/progmodes/project-tests.el | 15 +++++++
2 files changed, 49 insertions(+), 33 deletions(-)
diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
index daaf86f3277..153e31552bc 100644
--- a/lisp/progmodes/project.el
+++ b/lisp/progmodes/project.el
@@ -156,7 +156,7 @@
;;; Code:
-(require 'cl-generic)
+(require 'cl-lib)
(require 'seq)
(eval-when-compile (require 'subr-x))
@@ -418,33 +418,32 @@ project-vc-external-roots-function
backend implementation of `project-external-roots'.")
(defun project-try-vc (dir)
- (or (vc-file-getprop dir 'project-vc)
- (let* ((backend (ignore-errors (vc-responsible-backend dir)))
- (root
- (pcase backend
- ('Git
- ;; Don't stop at submodule boundary.
- (or (vc-file-getprop dir 'project-git-root)
- (let ((root (vc-call-backend backend 'root dir)))
- (vc-file-setprop
- dir 'project-git-root
- (if (and
- ;; FIXME: Invalidate the cache when the value
- ;; of this variable changes.
- (project--vc-merge-submodules-p root)
- (project--submodule-p root))
- (let* ((parent (file-name-directory
- (directory-file-name root))))
- (vc-call-backend backend 'root parent))
- root)))))
- ('nil nil)
- (_ (ignore-errors (vc-call-backend backend 'root dir)))))
- project)
- (when root
- (setq project (list 'vc backend root))
- ;; FIXME: Cache for a shorter time.
- (vc-file-setprop dir 'project-vc project)
- project))))
+ (unless (vc-file-getprop dir 'project-vc)
+ (let* ((backend (ignore-errors (vc-responsible-backend dir)))
+ (root
+ (pcase backend
+ ('Git
+ ;; Don't stop at submodule boundary.
+ (or (vc-file-getprop dir 'project-git-root)
+ (let ((root (vc-call-backend backend 'root dir)))
+ (vc-file-setprop
+ dir 'project-git-root
+ (if (and
+ ;; FIXME: Invalidate the cache when the value
+ ;; of this variable changes.
+ (project--vc-merge-submodules-p root)
+ (project--submodule-p root))
+ (let* ((parent (file-name-directory
+ (directory-file-name root))))
+ (vc-call-backend backend 'root parent))
+ root)))))
+ ('nil nil)
+ (_ (ignore-errors (vc-call-backend backend 'root dir))))))
+ (when root
+ ;; FIXME: Cache for a shorter time.
+ (vc-file-setprop dir 'project-vc (cons 'vc root))
+ (vc-file-setprop dir 'vc-backend backend))))
+ (vc-file-getprop dir 'project-vc))
(defun project--submodule-p (root)
;; XXX: We only support Git submodules for now.
@@ -470,7 +469,7 @@ project--submodule-p
(t nil))))
(cl-defmethod project-root ((project (head vc)))
- (nth 2 project))
+ (cdr project))
(cl-defmethod project-external-roots ((project (head vc)))
(project-subtract-directories
@@ -485,8 +484,9 @@ project-files
(lambda (dir)
(let ((ignores (project--value-in-dir 'project-vc-ignores dir))
backend)
- (if (and (file-equal-p dir (nth 2 project))
- (setq backend (cadr project))
+ (if (and (file-equal-p dir (cdr project))
+ (setq backend (or (vc-file-getprop dir 'vc-backend)
+ (vc-responsible-backend dir)))
(cond
((eq backend 'Hg))
((and (eq backend 'Git)
@@ -598,11 +598,12 @@ project--git-submodules
(file-missing nil)))
(cl-defmethod project-ignores ((project (head vc)) dir)
- (let* ((root (nth 2 project))
+ (let* ((root (cdr project))
backend)
(append
(when (file-equal-p dir root)
- (setq backend (cadr project))
+ (setq backend (or (vc-file-getprop dir 'vc-backend)
+ (vc-responsible-backend root)))
(delq
nil
(mapcar
diff --git a/test/lisp/progmodes/project-tests.el
b/test/lisp/progmodes/project-tests.el
index d4b6bca7e8f..c001106e9f0 100644
--- a/test/lisp/progmodes/project-tests.el
+++ b/test/lisp/progmodes/project-tests.el
@@ -32,6 +32,7 @@
(require 'ert-x) ; ert-with-temp-directory
(require 'grep)
(require 'xref)
+(require 'vc)
(ert-deftest project/quoted-directory ()
"Check that `project-files' and `project-find-regexp' deal with
@@ -110,4 +111,18 @@ project-ignores-bug-50240
(list
(expand-file-name "some-file" dir)))))))
+(ert-deftest project-sparing-backend-discovery ()
+ "Cache results of `vc-responsible-backend`."
+ (skip-unless (eq 'Git (ignore-errors
+ (vc-responsible-backend default-directory))))
+ (let* ((default-directory (vc-call-backend 'Git 'root default-directory))
+ (project (project-current)))
+ (should (vc-file-getprop default-directory 'project-vc))
+ (should (eq 'Git (vc-file-getprop default-directory 'vc-backend)))
+ (cl-letf (((symbol-function 'vc-responsible-backend)
+ (lambda (&rest _args) (should nil))))
+ (project-files project)
+ (vc-file-clearprops default-directory)
+ (should-error (project-files project)))))
+
;;; project-tests.el ends here
--
2.26.2
In Commercial Emacs 0.3.1snapshot 455dcd3 in bad_merges (upstream 29.0.50,
x86_64-pc-linux-gnu) built on dick
Repository revision: 455dcd3b1e5c5f8c23f44679096d1abb10657e76
Repository branch: bad_merges
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- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface,
dick <=
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Eli Zaretskii, 2022/03/13
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Rudolf Adamkovič, 2022/03/14
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Lars Ingebrigtsen, 2022/03/17
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Dmitry Gutov, 2022/03/17
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Lars Ingebrigtsen, 2022/03/18
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Dmitry Gutov, 2022/03/18
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, dick, 2022/03/18
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Juri Linkov, 2022/03/19
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Lars Ingebrigtsen, 2022/03/19
- bug#54359: 29.0.50; [PATCH] Undo breaking change to project interface, Dmitry Gutov, 2022/03/19