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php: Add enabledExtensions attribute to PHP derivations

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This provides a means to build a PHP package based on a list of
extensions from another.

For example, to generate a package with all default extensions
enabled, except opcache, but with ImageMagick:

php.withExtensions (e:
  (lib.filter (e: e != php.extensions.opcache) php.enabledExtensions)
  ++ [ e.imagick ])
This commit is contained in:
talyz
2020-04-05 15:56:28 +02:00
parent 8d2e5d5cd6
commit ca8b8a26e9
2 changed files with 21 additions and 6 deletions
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15
doc/languages-frameworks/php.section.md
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@@ -48,6 +48,21 @@ enabled:
php.withExtensions (e: with e; [ imagick opcache ])
```
Note that this will give you a package with _only_ opcache and
ImageMagick, none of the other extensions which are enabled by default
in the `php` package will be available.
To enable building on a previous PHP package, the currently enabled
extensions are made available in its `enabledExtensions`
attribute. For example, to generate a package with all default
extensions enabled, except opcache, but with ImageMagick:
```nix
php.withExtensions (e:
(lib.filter (e: e != php.extensions.opcache) php.enabledExtensions)
++ [ e.imagick ])
```
If you want a PHP build with extra configuration in the `php.ini`
file, you can use `php.buildEnv`. This function takes two named and
optional parameters: `extensions` and `extraConfig`. `extensions`