bug#63336: [PATCH] package-vc: Process :make and :shell-command spec args

[Ruijie Yu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Hello Joseph, 

On mobile so please excuse my brevity and top-posting. 

Minor remark on the defcustom type: I think you should move the current tag from "symbol" to its outer "repeat", and optionally tag "symbol" as something like "package name".  WDYT? 

--
Best, 


RY

> On May 8, 2023, at 04:29, Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors <bug-gnu-emacs@gnu.org> wrote:
> 
> Thanks for the review!
> 
> Philip Kaludercic <philipk@posteo.net> writes:
> 
>> Joseph Turner <joseph@breatheoutbreathe.in> writes:
>> 
>>> Hello!
>>> 
>>> Here's a patch to support :make and :shell-command args as discussed:
>>> 
>>> https://lists.gnu.org/archive/html/help-gnu-emacs/2023-04/msg00263.html
>> 
>> Thanks!
>> 
>>> Best,
>>> 
>>> Joseph
>>> 
>>> From c51161c51f11e6ffcba17758424596fe44f9d42a Mon Sep 17 00:00:00 2001
>>> From: Joseph Turner <joseph@breatheoutbreathe.in>
>>> Date: Sat, 6 May 2023 13:44:32 -0700
>>> Subject: [PATCH] package-vc: Process :make and :shell-command spec args
>>> 
>>> ---
>>> lisp/emacs-lisp/package-vc.el | 32 ++++++++++++++++++++++++++++++++
>>> 1 file changed, 32 insertions(+)
>>> 
>>> diff --git a/lisp/emacs-lisp/package-vc.el b/lisp/emacs-lisp/package-vc.el
>>> index 421947b528d..489610e2a1e 100644
>>> --- a/lisp/emacs-lisp/package-vc.el
>>> +++ b/lisp/emacs-lisp/package-vc.el
>>> @@ -344,6 +344,35 @@ asynchronously."
>>>         "\n")
>>>        nil pkg-file nil 'silent))))
>>> 
>>> +(defcustom package-vc-process-make nil
>>> +  "If non-nil, process :make and :shell-command spec arguments.
>>> +Package specs are loaded from trusted package archives."
>>> +  :type 'boolean)
>> 
>> As this patch is going to be added to Emacs 30, we should add
>> 
>>  :version "30.1"
>> 
>> tags to this user option.
> 
> Fixed.
> 
>>> +(defun package-vc--call (destination program &rest args)
>>> +  "Like ‘call-process’ for PROGRAM, DESTINATION, ARGS.
>>           ^
>> You should replace these quotation marks with regular ASCII `marks', so
>> avoid byte-compiler warnings.
> 
> Good catch.
> 
>>> +The INFILE and DISPLAY arguments are fixed as nil."
>>> +  (apply #'call-process program nil destination nil (delq nil args)))
>> 
>> What is the motivation for this function?  Is this where
>> process-isolation would be added in the future?
> 
> In the attached patch, package-vc--call is replaced with call-process.
> 
>>> +(defun package-vc--make (pkg-spec dir)
>>> +  "Process :make and :shell-command spec arguments."
>>> +  (let ((target (plist-get pkg-spec :make))
>>> +        (cmd (plist-get pkg-spec :shell-command)))
>>> +    (when (or cmd target)
>>> +      (with-current-buffer (get-buffer-create " *package-vc make*")
>>                                                 ^
>>                                                 should the package name
>>                                                 be mentioned here?
> 
> I like this idea, but IIUC package-vc--make would then need to take an
> extra arg, since pkg-spec doesn't contain the :name of the package. We
> could also add :name to the pkg-spec plist?
> 
> For comparison, package-vc--build-documentation creates a buffer called
> " *package-vc doc*" without the package name.
> 
>>> +        (erase-buffer)
>>> +        (when (and cmd
>>> +                   (/= 0 (package-vc--call t shell-file-name
>>> +                                           shell-command-switch
>>> +                                           cmd)))
>>> +          (message "Failed to run %s, see buffer %S"
>> 
>> Could `warn' be a better candidate here, instead of `message'?
> 
> Done.
> 
>>> +                   cmd (buffer-name)))
>>> +        (when (and target
>>> +                   (/= 0 (apply #'package-vc--call t "make"
>>> +                                (if (consp target) target (list target)))))
>>> +          (message "Failed to make %s, see buffer %S"
> 
> And this message is changed to warn also.
> 
>>> +                   target (buffer-name)))))))
>>> +
>>> (declare-function org-export-to-file "ox" (backend file))
>>> 
>>> (defun package-vc--build-documentation (pkg-desc file)
>>> @@ -486,6 +515,9 @@ documentation and marking the package as installed."
>>>       ;; Generate package file
>>>       (package-vc--generate-description-file pkg-desc pkg-file)
>>> 
>>> +      ;; Process :make and :shell-command arguments before building documentation
>>> +      (when package-vc-process-make (package-vc--make pkg-spec pkg-dir))
>> 
>> Wasn't the plan to allow `package-vc-process-make' to either be a
>> generic "build-anything" or a selective listing of packages where we
>> allow :make and :shell-command to be executed?
> 
> Let me know if the attached commit accomplishes what you had in mind.
> 
>>> +
>>>       ;; Detect a manual
>>>       (when (executable-find "install-info")
>>>         (dolist (doc-file (ensure-list (plist-get pkg-spec :doc)))
>> 
>> Otherwise this looks good, but I haven't tried it out yet.
> 
> I fixed up a couple other issues:
> 
> - removed unnecessary dir arg to package-vc--make
> - added function arg to the docstring for package-vc--make
> 
> I'm not sure if the customization type for package-vc-process-make is
> correct. Please double check that.
> 
> Also, should users be able to run :make and :shell-command args defined
> in a spec passed into package-vc-install?
> 
> Best,
> 
> Joseph
> 
> <0001-package-vc-Process-make-and-shell-command-spec-args.patch>