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spacemacs/layers/+lang/groovy/config.el
Lucius Hu 3bbc7a7d40
core-customization: improved SAFE variable handling (#14679)
* core-customization: improved SAFE variable handling

- SAFE can either be a function or t.
  - When it's t, use a default validation function
    `(lambda (val) (validate-value val TYPE t))`
  - When it's a function, use the supplied function.

* Fixed bugs in go and groovy layer

In almost any cases, it's better to supply `t` instead of a function, to
`SAFE` argument of `spacemacs|defc`.

For example,
```elisp
 (spacemacs|defc go-use-gocheck-for-testing nil
   "If using gocheck for testing when running the tests -check.f will be used instead of -run to specify the test that will be ran. Gocheck is mandatory for testing suites."
  'boolean nil #'booleanp)
```

If its value is nil, it evaluate to `nil`, which means that `nil` is not
a safe value for `go-use-gocheck-for-testing` local variable.

But clearly it is.

* core-customization: improved SAFE variable handling

- Added a function `spacemacs-customization//get-variable-validator`.
  This function is designed to be used with `safe-local-variable`
  property of spacemacs custom variables.
  See details in the docstring.

```elisp
(put 'FOO 'safe-local-variable
     (apply-partially 'spacemacs-customization//get-variable-validator
                      'FOO))
```

- This is better than a lambda since `apply-partially` returns a compiled
  function. (Though the performace gain may be tiny.)
- This is better than simply calling `validate-value`, because it returns
  nil when value is nil. But sometimes nil is a valid value.

Co-authored-by: Lucius Hu <lebensterben@users.noreply.github.com>
2021-04-19 21:34:09 +02:00

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EmacsLisp

;;; config.el --- Groovy layer configuration File for Spacemacs
;;
;; Copyright (c) 2012-2021 Sylvain Benner & Contributors
;;
;; Author: Maximilian Wolff <smile13241324@gmail.com>
;; URL: https://github.com/syl20bnr/spacemacs
;;
;; This file is not part of GNU Emacs.
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;; Variables
(spacemacs|defc groovy-backend (if (configuration-layer/layer-used-p 'lsp) 'lsp 'company-groovy)
"The backend to use for IDE features.
Possible values are `lsp' and `company-groovy'.
If not set then 'company-groovy` is the default backend unless `lsp' layer is used"
'(choice (const lsp) (const company-groovy)) nil t)
(spacemacs|defc groovy-lsp-jar-path "~/groovy-lsp-all.jar"
"The path to the lsp jar file"
'(file :must-match t) nil t)