GNU bug report logs - #59226
29.0.50; unable to load package-vc.el if package-vc-selected-packages is non-nil

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From: Richard Kim <emacs18 <at> gmail.com>
To: Philip Kaludercic <philipk <at> posteo.net>
Cc: 59226 <at> debbugs.gnu.org
Subject: bug#59226: 29.0.50; unable to load package-vc.el if package-vc-selected-packages is non-nil
Date: Tue, 15 Nov 2022 15:04:47 -0800

Thanks Philip.  I built scratch/package-vc-fixes branch, and verified
that the problem reported by me is gone.

I would like to ask a follow-up question.  I'm trying to use
package-vc as a replacement for straight.el in my setup.
I've been using straight.el within spacemacs for some time.  If you
are interested, the details can be found at
https://github.com/emacs18/spacemacs/tree/sm-straight

The key thing I have not yet figured out is how to activate packages
installed by package-vc when emacs starts up.
Package activation is done by the latter part of package-vc--unpack-1
function.  Would it be possible to split out
activation as a separate function?

On Mon, 14 Nov 2022 at 03:31, Philip Kaludercic <philipk <at> posteo.net> wrote:
>
> Richard Kim <emacs18 <at> gmail.com> writes:
>
> > I would like to report what appears to be a bug in ~package-vc.el~ where emacs is
> > unable to load this file if ~package-vc-selected-packages~ variable is
> > ~not-nil~. To see this problem I created following simple test file:
> >
> > #+begin_src elisp
> > $ cat ~/demo-package-vc-issue
> >
> > (setq package-vc-selected-packages
> >       '((treemacs-projectile
> >          :lisp-dir "src/extra"
> >          :main-file "treemacs-projectile.el"
> >          :url "https://github.com/Alexander-Miller/treemacs")))
> >
> > (setq debug-on-error t)
> >
> > (load-library "package-vc.el")
> > #+end_src
>
>
> > then following error is reported
> >
> > #+begin_example
> > Debugger entered--Lisp error: (void-function package-vc--archives-initialize)
> >   (package-vc--archives-initialize)
> >   (cond ((null spec) (package-vc-install name)) ((stringp spec) (package-vc-install name nil spec)) ((listp spec) (package-vc--archives-initialize) (package-vc--unpack pkg-desc spec)))
> >   (if (and name (package-installed-p name) (eq (progn (or (progn (and (memq ... cl-struct-package-desc-tags) t)) (signal 'wrong-type-argument (list 'package-desc pkg-desc))) (aref pkg-desc 5)) 'vc)) nil (cond ((null spec) (package-vc-install name)) ((stringp spec) (package-vc-install name nil spec)) ((listp spec) (package-vc--archives-initialize) (package-vc--unpack pkg-desc spec))))
> >   (let ((pkg-desc (car (cdr (assoc name package-alist #'string=))))) (if (and name (package-installed-p name) (eq (progn (or (progn (and ... t)) (signal 'wrong-type-argument (list ... pkg-desc))) (aref pkg-desc 5)) 'vc)) nil (cond ((null spec) (package-vc-install name)) ((stringp spec) (package-vc-install name nil spec)) ((listp spec) (package-vc--archives-initialize) (package-vc--unpack pkg-desc spec)))))
> >   (let ((name x1) (spec x2)) (let ((pkg-desc (car (cdr (assoc name package-alist #'string=))))) (if (and name (package-installed-p name) (eq (progn (or (progn ...) (signal ... ...)) (aref pkg-desc 5)) 'vc)) nil (cond ((null spec) (package-vc-install name)) ((stringp spec) (package-vc-install name nil spec)) ((listp spec) (package-vc--archives-initialize) (package-vc--unpack pkg-desc spec))))))
> >   (let* ((x2 (cdr-safe x0))) (let ((name x1) (spec x2)) (let ((pkg-desc (car (cdr (assoc name package-alist ...))))) (if (and name (package-installed-p name) (eq (progn (or ... ...) (aref pkg-desc 5)) 'vc)) nil (cond ((null spec) (package-vc-install name)) ((stringp spec) (package-vc-install name nil spec)) ((listp spec) (package-vc--archives-initialize) (package-vc--unpack pkg-desc spec)))))))
> >   (progn (ignore (symbolp x1)) (let* ((x2 (cdr-safe x0))) (let ((name x1) (spec x2)) (let ((pkg-desc (car (cdr ...)))) (if (and name (package-installed-p name) (eq (progn ... ...) 'vc)) nil (cond ((null spec) (package-vc-install name)) ((stringp spec) (package-vc-install name nil spec)) ((listp spec) (package-vc--archives-initialize) (package-vc--unpack pkg-desc spec))))))))
> >   (let* ((x1 (car-safe x0))) (progn (ignore (symbolp x1)) (let* ((x2 (cdr-safe x0))) (let ((name x1) (spec x2)) (let ((pkg-desc (car ...))) (if (and name (package-installed-p name) (eq ... ...)) nil (cond (... ...) (... ...) (... ... ...))))))))
> >   (progn (ignore (consp x0)) (let* ((x1 (car-safe x0))) (progn (ignore (symbolp x1)) (let* ((x2 (cdr-safe x0))) (let ((name x1) (spec x2)) (let ((pkg-desc ...)) (if (and name ... ...) nil (cond ... ... ...))))))))
> >   (let ((x0 (car tail))) (progn (ignore (consp x0)) (let* ((x1 (car-safe x0))) (progn (ignore (symbolp x1)) (let* ((x2 (cdr-safe x0))) (let ((name x1) (spec x2)) (let (...) (if ... nil ...))))))) (setq tail (cdr tail)))
> >   (while tail (let ((x0 (car tail))) (progn (ignore (consp x0)) (let* ((x1 (car-safe x0))) (progn (ignore (symbolp x1)) (let* ((x2 ...)) (let (... ...) (let ... ...)))))) (setq tail (cdr tail))))
> >   (let ((tail package-vc-selected-packages)) (while tail (let ((x0 (car tail))) (progn (ignore (consp x0)) (let* ((x1 (car-safe x0))) (progn (ignore (symbolp x1)) (let* (...) (let ... ...))))) (setq tail (cdr tail)))))
> >   package-vc-ensure-packages()
> >   (closure (t) (sym val) (custom-set-default sym val) (package-vc-ensure-packages))(package-vc-selected-packages ((treemacs-projectile :lisp-dir "src/extra" :main-file "treemacs-projectile.el" :url "https://github.com/Alexander-Miller/treemacs")))
> >   custom-initialize-reset(package-vc-selected-packages (funcall #'(closure (t) nil "" 'nil)))
> >   custom-declare-variable(package-vc-selected-packages (funcall #'(closure (t) nil "" 'nil)) "List of packages that must be installed.\nEach memb..." :type (alist :tag "List of packages you want to be installed" :key-type (symbol :tag "Package") :value-type (choice (const :tag "Any revision" nil) (string :tag "Specific revision") (plist :options ((:url string) (:branch string) (:lisp-dir string) (:main-file string) (:vc-backend symbol))))) :set (closure (t) (sym val) (custom-set-default sym val) (package-vc-ensure-packages)) :version "29.1")
> >   eval-buffer(#<buffer  *load*-179493> nil "/home/kimr/opt/emacs29/20221112/share/emacs/29.0.5..." nil t)  ; Reading at buffer position 6633
> >   load-with-code-conversion("/home/kimr/opt/emacs29/20221112/share/emacs/29.0.5..." "/home/kimr/opt/emacs29/20221112/share/emacs/29.0.5..." nil nil)
> >   load("package-vc.el")
> >   load-library("package-vc.el")
> >   eval-buffer(#<buffer  *load*> nil "/home/kimr/.emacs-debug-1" nil t)  ; Reading at buffer position 262
> >   load-with-code-conversion("/home/kimr/.emacs-debug-1" "/home/kimr/.emacs-debug-1" nil t)
> >   load("/home/kimr/.emacs-debug-1" nil t)
> >   command-line-1(("-l" "/home/kimr/.emacs-debug-1"))
> >   command-line()
> >   normal-top-level()
> > #+end_example
>
> Can you try the scratch/package-vc-fixes branch.  I haven't merged it
> yet, because I might need to revise some commits and I don't want to be
> pushing minor fixes to master all the time.

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