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lib.meta.availableOn: Return false if pkg parameter is null

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To fix overriding packages that checks for platform compatibility, like pipewire.

`pipewire` contains the following logic to enable support for ldac depending on library platform compatibility:
```nix
ldacbtSupport = lib.meta.availableOn stdenv.hostPlatform ldacbt
```

Which is used later in the expression to create a Meson flag:
```nix
(lib.mesonEnable "bluez5-codec-ldac" (bluezSupport && ldacbtSupport))
```

This means that attempting to build `pipewire` without `ldacbt` like:
```nix
pipewire.override {
  ldacbt = null;
}
```
will fail because the the Meson flag indicates the feature should be enabled, but the library is passed to `buildInputs` as `null`.
This commit is contained in:
adisbladis 2025-05-02 18:20:17 +02:00
parent 4ad8dfd97d
commit 9338d924db
1 changed files with 2 additions and 1 deletions
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3
lib/meta.nix
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@ -289,7 +289,8 @@ rec {
*/ */
availableOn = availableOn =
platform: pkg: platform: pkg:
((!pkg ? meta.platforms) || any (platformMatch platform) pkg.meta.platforms) pkg != null
&& ((!pkg ? meta.platforms) || any (platformMatch platform) pkg.meta.platforms)
&& all (elem: !platformMatch platform elem) (pkg.meta.badPlatforms or [ ]); && all (elem: !platformMatch platform elem) (pkg.meta.badPlatforms or [ ]);
/** /**