depot/third_party/nixpkgs/pkgs/development/libraries/gobject-introspection/wrapper.nix

{ lib
, stdenv
, buildPackages
, targetPackages
, gobject-introspection-unwrapped
, ...
}@_args:

# to build, run
# `nix build ".#pkgsCross.aarch64-multiplatform.buildPackages.gobject-introspection"`

# a comment for both depsTargetTargetPropagated's
# add self to buildInputs to avoid needing to add gobject-introspection to buildInputs in addition to nativeBuildInputs
# builds use target-pkg-config to look for gobject-introspection instead of just looking for binaries in $PATH

let
  # ensure that `.override` works
  args = builtins.removeAttrs _args [ "buildPackages" "targetPackages" "gobject-introspection-unwrapped" ];
  # passing this stdenv to `targetPackages...` breaks due to splicing not working in `.override``
  argsForTarget = builtins.removeAttrs args [ "stdenv" ];

  overriddenUnwrappedGir = gobject-introspection-unwrapped.override args;
  # if we have targetPackages.gobject-introspection then propagate that
  overridenTargetUnwrappedGir =
    if targetPackages ? gobject-introspection-unwrapped
    then targetPackages.gobject-introspection-unwrapped.override argsForTarget
    else overriddenUnwrappedGir;
in

# wrap both pkgsCrossX.buildPackages.gobject-introspection and {pkgs,pkgsSomethingExecutableOnBuildSystem).buildPackages.gobject-introspection
if (!stdenv.hostPlatform.canExecute stdenv.targetPlatform) && stdenv.targetPlatform.emulatorAvailable buildPackages
then
  overriddenUnwrappedGir.overrideAttrs
    (previousAttrs:
      {

        pname = "gobject-introspection-wrapped";
        passthru = previousAttrs.passthru // {
          unwrapped = overriddenUnwrappedGir;
        };
        dontStrip = true;
        depsTargetTargetPropagated = [ overridenTargetUnwrappedGir ];
        buildCommand = ''
          eval fixupPhase
          ${lib.concatMapStrings (output: ''
            mkdir -p ${"$" + "${output}"}
            ${lib.getExe buildPackages.xorg.lndir} ${overriddenUnwrappedGir.${output}} ${"$" + "${output}"}
          '') overriddenUnwrappedGir.outputs}

          cp $dev/bin/g-ir-compiler $dev/bin/.g-ir-compiler-wrapped
          cp $dev/bin/g-ir-scanner $dev/bin/.g-ir-scanner-wrapped

          (
            rm "$dev/bin/g-ir-compiler"
            rm "$dev/bin/g-ir-scanner"
            export bash="${buildPackages.bash}"
            export emulator=${lib.escapeShellArg (stdenv.targetPlatform.emulator buildPackages)}
            export emulatorwrapper="$dev/bin/g-ir-scanner-qemuwrapper"
            export buildlddtree="${buildPackages.pax-utils}/bin/lddtree"

            export targetgir="${lib.getDev overridenTargetUnwrappedGir}"

            substituteAll "${./wrappers/g-ir-compiler.sh}" "$dev/bin/g-ir-compiler"
            substituteAll "${./wrappers/g-ir-scanner.sh}" "$dev/bin/g-ir-scanner"
            substituteAll "${./wrappers/g-ir-scanner-lddwrapper.sh}" "$dev/bin/g-ir-scanner-lddwrapper"
            substituteAll "${./wrappers/g-ir-scanner-qemuwrapper.sh}" "$dev/bin/g-ir-scanner-qemuwrapper"
            chmod +x $dev/bin/g-ir-compiler
            chmod +x $dev/bin/g-ir-scanner*
          )
        ''
        # when cross-compiling and using the wrapper then when a package looks up the g_ir_X
        # variable with pkg-config they'll get the host version which can't be run
        # override the variable to use the absolute path to g_ir_X in PATH which can be run
        + ''
          cat >> $dev/nix-support/setup-hook <<-'EOF'
            override-pkg-config-gir-variables() {
              PKG_CONFIG_GOBJECT_INTROSPECTION_1_0_G_IR_SCANNER="$(type -p g-ir-scanner)"
              PKG_CONFIG_GOBJECT_INTROSPECTION_1_0_G_IR_COMPILER="$(type -p g-ir-compiler)"
              PKG_CONFIG_GOBJECT_INTROSPECTION_1_0_G_IR_GENERATE="$(type -p g-ir-generate)"
              export PKG_CONFIG_GOBJECT_INTROSPECTION_1_0_G_IR_SCANNER
              export PKG_CONFIG_GOBJECT_INTROSPECTION_1_0_G_IR_COMPILER
              export PKG_CONFIG_GOBJECT_INTROSPECTION_1_0_G_IR_GENERATE
            }

            preConfigureHooks+=(override-pkg-config-gir-variables)
          EOF
        '';
      })
else
  overriddenUnwrappedGir.overrideAttrs (previousAttrs:
    {
      pname = "gobject-introspection-wrapped";
      passthru = previousAttrs.passthru // {
        unwrapped = overriddenUnwrappedGir;
      };
      dontStrip = true;
      depsTargetTargetPropagated = [ overridenTargetUnwrappedGir ];
      buildCommand = ''
        eval fixupPhase
        ${lib.concatMapStrings (output: ''
          mkdir -p ${"$" + "${output}"}
          ${lib.getExe buildPackages.xorg.lndir} ${overriddenUnwrappedGir.${output}} ${"$" + "${output}"}
        '') overriddenUnwrappedGir.outputs}
      '';
    })