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Disable use-package's :ensure t property by default

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Many packages recommend setting up their packages with something like:

  (use-package PACKAGE
    :ensure t
    ...)

New users will frequently copy these into their config, then experience
long startup times or a cryptic error about the package failing to
install.

This is because `:ensure t`, by default, uses package.el (Emacs'
built-in package manager) to check for and install packages, but Doom
doesn't use package.el, it uses straight.el. So we disable `:ensure`.

On the other hand, if the user has loaded `package` by hand, then we
should assume that they know what they're doing, and restore the old
behavior.
This commit is contained in:
Henrik Lissner
2020-05-11 16:16:58 -04:00
parent 5e7d684927
commit 24164f4869
1 changed files with 11 additions and 0 deletions
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11
core/core-modules.el
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@ -254,6 +254,17 @@ This value is cached. If REFRESH-P, then don't use the cached value."
;; Macros are already fontified, no need for this ;; Macros are already fontified, no need for this
(font-lock-remove-keywords 'emacs-lisp-mode use-package-font-lock-keywords) (font-lock-remove-keywords 'emacs-lisp-mode use-package-font-lock-keywords)
;; A common mistake for new users is that they inadvertantly try to install
;; their packages with package.el, by copying over old `use-package'
;; declarations with an :ensure t property. Doom doesn't use package.el, so
;; this will throw an error that will confuse beginners.
(setq use-package-ensure-function #'ignore)
;; ...On the other hand, if the user has loaded `package', then we should
;; assume they know what they're doing and restore the old behavior:
(add-transient-hook! 'package-initialize
(when (eq use-package-ensure-function #'ignore)
(setq use-package-ensure-function #'use-package-ensure-elpa)))
;; We define :minor and :magic-minor from the `auto-minor-mode' package here ;; We define :minor and :magic-minor from the `auto-minor-mode' package here
;; so we don't have to load `auto-minor-mode' so early. ;; so we don't have to load `auto-minor-mode' so early.
(dolist (keyword '(:minor :magic-minor)) (dolist (keyword '(:minor :magic-minor))