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php.packages: Make packages overridable

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This will allow patching extensions without having to manually having to patch all occurrences in the dependency tree.
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Jan Tojnar 2020-12-16 00:06:42 +01:00
parent 7e8b2b7e98
commit b2594c71c2
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18
doc/languages-frameworks/php.section.md
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@ -135,3 +135,21 @@ Example of building `composer` with additional extensions:
enabled ++ (with all; [ imagick redis ]))
).packages.composer
```
### Overriding PHP packages {#ssec-php-user-guide-overriding-packages}
`php-packages.nix` form a scope, allowing us to override the packages defined within. For example, to apply a patch to a `mysqlnd` extension, you can simply pass an overlay-style function to `php`’s `packageOverrides` argument:
```nix
php.override {
packageOverrides = final: prev: {
extensions = prev.extensions // {
mysqlnd = prev.extensions.mysqlnd.overrideAttrs (attrs: {
patches = attrs.patches or [] ++ [
…
];
});
};
};
}
```