Commits on Nov 7, 2024

1. gobject-introspection: Conditionalize depsTargetTargetPropagated …

   Fixes ↓
   
   ```
   nix-repl> pkgsCross.x86_64-freebsd.pkgsBuildHost.gobject-introspection
   error: Don't know how to run x86_64-unknown-freebsd executables.
   ```
   
   The unwrapped already doesn't error
   
   ```
   nix-repl> pkgsCross.x86_64-freebsd.pkgsBuildHost.gobject-introspection-unwrapped
   «derivation /nix/store/xq4q4vigy2glmfng2h6bbr4sysyk8ipz-gobject-introspection-1.82.0.drv»
   ```
   
   https://www.github.com/NixOS/nixpkgs/blob/7b1cffdd2e13b2cdad5b37e259016efd0ea48fcd/pkgs/development/libraries/gobject-introspection/default.nix#L114
   
   It's caused by `depsTargetTargetPropagated = [ overridenTargetUnwrappedGir ];` in the wrapper
   
   In `graphene` there is
   `PATH=${python3.withPackages (pp: [ pp.pygobject3 pp.tappy ])}/bin:$PATH patchShebangs tests/introspection.py`
   
   Which causes the `Don't know` error in `pkgsCross.x86_64-freebsd.pkgsBuildHost.graphene`
   
   because `python3` and `pygobject3` will be from `pkgsHostTarget`
   
   and then `pygobject3` has `gobject-introspection` from `pkgsHostTarget`
   
   and then that `gobject-introspection` will have `pkgsCross.x86_64-freebsd.pkgsCross.x86_64-freebsd.buildPackages.pkgsTargetTarget.gobject-introspection.gobject-introspection` in `depsTargetTargetPropagated`
   
   To test that importing the python library `gi` works without `depsTargetTargetPropagated`
   
   ```nix
   let
     pkgs =
       (import ./. {
         crossSystem = (import ./lib).systems.examples.aarch64-multiplatform;
         # On `master` uncomment this and comment `propagatedBuildInputs` below and you'll get
         # error: Don't know how to run x86_64-unknown-freebsd executables.
         #crossSystem = (import ./lib).systems.examples.x86_64-freebsd;
         overlays = [
           (_: prev: {
             pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [
               (_: pprev: {
                 pygobject3-test = pprev.pygobject3.overrideAttrs {
                   propagatedBuildInputs = [
                     pprev.pycairo
                     (prev.gobject-introspection.overrideAttrs { depsTargetTargetPropagated = [ ]; })
                   ];
                 };
               })
             ];
           })
         ];
       }).pkgs;
     pyr = pkgs.pkgsBuildHost.python3Packages.python.withPackages (pp: [ pp.pygobject3-test ]);
   in
   pkgs.pkgsBuildBuild.runCommand "test" { } ''
     "${pyr.interpreter}" -c "import gi" && touch "$out"
   ''
   ```

   

   Artturin committed Nov 7, 2024
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