Re: Proposal for 'package-isolate' command

[Thierry Volpiatto]

Hello Philip,

Philip Kaludercic <philipk@posteo.net> writes:

> Thierry Volpiatto <thievol@posteo.net> writes:
>
>> Philip Kaludercic <philipk@posteo.net> writes:
>>
>>>> No don't worry, helm will work in any cases, thanks.
>>>
>>> OK, in that case I'd prefer to keep it the way it is.
>>
>> Ok, fair enough.
>>
>>>>> Mainly to avoid issues with packages that might place files in the
>>>>> configuration directory, which might hinder the reproduction of bugs.
>>>>
>>>> Hmm, maybe, I don't have an example in mind though.
>>>
>>> It might not be the best example, but my package autocrypt generates a
>>> file in the `user-emacs-directory'.  If we don't use --init-directory,
>>> the existing file would be re-used.
>>
>> Ok, for such case it is easy to either rename the file temporarily to
>> foo_ori or foo_save or to set the variable handling the file (generally
>> it is not harcoded) to something else. But another issue is if your
>> isolated package needs the history file or tramp file or whatever file
>> ~/.emacs.d is handling; e.g. a package providing completion on history.
>> I still think it is more handy to reuse user-emacs-directory and its
>> elpa directory where the packages are already installed.
>
> How about this patch, that will use a temporary directory when
> `package-isolate' is invoked with a prefix argument (not sure what the
> default should be, I guess reusing `user-emacs-directory' is less
> surprising):

Yes.

Isn't these two loop the same? (save one loop)

    (cl-loop for p in (cl-loop for p in (package--alist) append (cdr p))
         unless (package-built-in-p p)
         collect (cons (package-desc-full-name p) p) into table
         finally return
         (list (cl-loop for c in (completing-read-multiple
                                      "Isolate packages: " table
                                      nil t)
                        collect (alist-get c table nil nil #'string=))
                   current-prefix-arg))

    (cl-loop for p in (package--alist)
             for desc = (cadr p)
             for name = (car p)
             unless (package-built-in-p desc)
             collect (cons (package-desc-full-name desc) p) into table
             finally return
             (list (cl-loop for c in (completing-read-multiple
                                      "Isolate packages: " table
                                      nil t)
                            append (cdr (alist-get c table nil nil #'string=)))
                   current-prefix-arg))


> [2. text/x-diff; 
> 0001-Add-command-to-start-Emacs-with-specific-packages.patch]...


-- 
Thierry

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