Re: Combine multiple (straight-)use-package commands into one.

[Thibaut Verron <thibaut.verron@gmail.com>]

On 6/13/21 3:29 PM, Hongyi Zhao wrote:
> On Sun, Jun 13, 2021 at 8:53 PM Hongyi Zhao <hongyi.zhao@gmail.com> wrote:
>> On Sun, Jun 13, 2021 at 6:22 PM Thibaut Verron <thibaut.verron@gmail.com> wrote:
>>> On 12/06/2021 16:57, Hongyi Zhao wrote:
>>>> On Sat, Jun 12, 2021 at 5:57 PM Hongyi Zhao <hongyi.zhao@gmail.com> wrote:
>>>>> On Ubuntu 20.04, according to the instruction
>>>>> [here](https://github.com/raxod502/straight.el/issues/786#issuecomment-859155336),
>>>>> I use the following settings in my Emacs init file:
>>>>>
>>>>> ```
>>>>> ;;Bootstrap straight
>>>>> (defvar bootstrap-version)
>>>>> (let ((bootstrap-file
>>>>>          (expand-file-name "straight/repos/straight.el/bootstrap.el"
>>>>> user-emacs-directory))
>>>>>         (bootstrap-version 5))
>>>>>     (unless (file-exists-p bootstrap-file)
>>>>>       (with-current-buffer
>>>>>           (url-retrieve-synchronously
>>>>>            "https://raw.githubusercontent.com/raxod502/straight.el/develop/install.el"
>>>>>            'silent 'inhibit-cookies)
>>>>>         (goto-char (point-max))
>>>>>         (eval-print-last-sexp)))
>>>>>     (load bootstrap-file nil 'nomessage))
>>>>>
>>>>> ;; Install use-package via straight
>>>>> (straight-use-package 'use-package)
>>>>>
>>>>> ;; Setting this to `t' makes it so that you don't need to include the :straight
>>>>> ;; keyword in use-package declarations unless you want to add/extend the package
>>>>> ;; installation recipe.
>>>>>
>>>>> (setq straight-use-package-by-default t) ; straight's equivalent of
>>>>> `use-package-always-ensure'.
>>>>> ```
>>>>> Now, I want to install multiple package hosted in recipe repositories
>>>>> (such as MELPA) as shown below with only one (straight-)use-package
>>>>> command, is it possible?
>>>>> ```
>>>>> (use-package flycheck)
>>>>> (use-package lsp-mode)
>>>>> (use-package dash)
>>>>> (use-package posframe)
>>>>> (use-package s)
>>>>> (use-package ein)
>>>>> (use-package smartparens)
>>>>> (use-package valign)
>>>>> (use-package multi-term)
>>>>> ```
>>>> Based on the code snippets at
>>>> <https://github.com/flakyhermit/emacs.d/blob/6b488895071e980433facf648f482974526d6a13/init.el#L22>,
>>>> I figured out the following solution with `straight-use-package'
>>>> command:
>>>>
>>>> (defvar package-list)
>>>> (setq package-list '(
>>>>          flycheck lsp-mode dash posframe
>>>>          s ein smartparens valign
>>>>          multi-term
>>>> ))
>>>>
>>>> (mapc (lambda(package-name)
>>>> (straight-use-package package-name)) package-list)
>>>>
>>>> But I still don't know the corresponding implementation with
>>>> `use-package' command.
>>> I don't understand what you don't like about this code: as far as I know
>>> (straight-use-package 'foo) is strictly equivalent to (use-package foo
>>> :straight t), and with straight-use-package-by-default you don't need
>>> the :straight t.
>>>
>>> Why is it such a problem to have straight-use-package in this loop
>>> instead of use-package?
>> Just out of curiosity to learn Lisp's ability: understanding and grasp
>> different methods for the same job.
>>
>>> One confusion which took me quite a long time to clear, is that despite
>>> the similar names, straight-use-package and use-package have very
>>> different purposes: straight-use-package is for installing the package
>>> (similar to package-install) while use-package is for grouping together
>>> everything related to a package (this includes installation, either by
>>> straight or package.el,
>> AFAIK, straight is not compatible with package.el, see
>> <https://github.com/raxod502/straight.el/issues/786#issuecomment-859155336>
>> for more detailed info.
> Also see <https://github.com/raxod502/straight.el#getting-started>:
>
> You should remove any code that relates to package.el; for example,
> references to package-initialize, package-archives, and (if you're
> using use-package) :ensure or use-package-always-ensure.

Yes, use-package can be used with straight and package.el by just 
changing a keyword (:ensure <-> :straight), but mixing them in the same 
configuration is definitely not recommended.

Straight itself is not compatible with package.el and has no reason to 
be, since it is intended as a replacement.