java/flake.nix

{
  description = "Adoptium Java";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, utils }:
    utils.lib.eachSystem [ "x86_64-linux" ] (system:
      let
        sources = builtins.fromJSON (builtins.readFile ./sources.json);
        buildAdoptLike = with import nixpkgs { system = system; }; name: value:
          let
            cpuName = stdenv.hostPlatform.parsed.cpu.name;
            runtimeDependencies = [
              pkgs.cups
              pkgs.cairo
              pkgs.glib
              pkgs.gtk3
            ];
            runtimeLibraryPath = lib.makeLibraryPath runtimeDependencies;
          in
          stdenv.mkDerivation rec {
            name = "jdk${toString value.major_version}";
            src = builtins.fetchurl {
              url = value.link;
              sha256 = value.sha256;
            };
            version = value.java_version;
            buildInputs = with pkgs; [
              alsa-lib
              fontconfig
              freetype
              stdenv.cc.cc.lib
              xorg.libX11
              xorg.libXext
              xorg.libXi
              xorg.libXrender
              xorg.libXtst
              zlib
              util-linux
            ];
            nativeBuildInputs = with pkgs; [
              autoPatchelfHook
              makeWrapper
            ];
            dontStrip = 1;
            installPhase = ''
              cd ..
              mv $sourceRoot $out
              # jni.h expects jni_md.h to be in the header search path.
              ln -s $out/include/linux/*_md.h $out/include/
              rm -rf $out/demo
              # Remove some broken manpages.
              rm -rf $out/man/ja*
              # Remove embedded freetype to avoid problems like
              # https://github.com/NixOS/nixpkgs/issues/57733
              find "$out" -name 'libfreetype.so*' -delete
              # Propagate the setJavaClassPath setup hook from the JDK so that
              # any package that depends on the JDK has $CLASSPATH set up
              # properly.
              mkdir -p $out/nix-support
              printWords ${setJavaClassPath} > $out/nix-support/propagated-build-inputs
              # Set JAVA_HOME automatically.
              cat <<EOF >> "$out/nix-support/setup-hook"
              if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
              EOF
              # We cannot use -exec since wrapProgram is a function but not a command.
              #
              # jspawnhelper is executed from JVM, so it doesn't need to wrap it, and it
              # breaks building OpenJDK (#114495).
              for bin in $( find "$out" -executable -type f -not -name jspawnhelper ); do
                if patchelf --print-interpreter "$bin" &> /dev/null; then
                  wrapProgram "$bin" --prefix LD_LIBRARY_PATH : "${runtimeLibraryPath}"
                fi
              done
            '';
            preFixup = ''
              find "$out" -name libfontmanager.so -exec \
                patchelf --add-needed libfontconfig.so {} \;
            '';
          };
      in
      with import nixpkgs { system = system; };
      {
        packages.temurin = (builtins.mapAttrs
          (name: value:
            buildAdoptLike name value
          )
          sources.${system}.temurin.versions) // {
          latest = buildAdoptLike "latest" sources.${system}.temurin.latest;
          stable = buildAdoptLike "stable" sources.${system}.temurin.stable;
          lts = buildAdoptLike "lts" sources.${system}.temurin.lts;
        };

        packages.temurin-latest = self.packages.${system}.temurin.latest;
        packages.temurin-stable = self.packages.${system}.temurin.stable;
        packages.temurin-lts = self.packages.${system}.temurin.lts;

        packages.semeru = (builtins.mapAttrs
          (name: value:
            buildAdoptLike name value)
          sources.${system}.semeru.versions) // {
          latest = buildAdoptLike "latest" sources.${system}.semeru.latest;
          stable = buildAdoptLike "stable" sources.${system}.semeru.stable;
          lts = buildAdoptLike "lts" sources.${system}.semeru.lts;
        };

        packages.semeru-latest = self.packages.${system}.semeru.latest;
        packages.semeru-stable = self.packages.${system}.semeru.stable;
        packages.semeru-lts = self.packages.${system}.semeru.lts;

        defaultPackage = self.packages.${system}.stable;
      });
}