feat: Get java builds working

flake.lock

@@ -10,13 +10,31 @@
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
-        "type": "indirect"
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1638122382,
+        "narHash": "sha256-sQzZzAbvKEqN9s0bzWuYmRaA03v40gaJ4+iL1LXjaeI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "74f7e4319258e287b0f9cb95426c9853b282730b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -1,11 +1,99 @@
 {
-  description = "A very basic flake";
-
-  outputs = { self, nixpkgs }: {
-
-    packages.x86_64-linux.hello = nixpkgs.legacyPackages.x86_64-linux.hello;
-
-    defaultPackage.x86_64-linux = self.packages.x86_64-linux.hello;
+  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);
+      in
+      with import nixpkgs { system = system; };
+      {
+        packages.jdks = builtins.mapAttrs
+          (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${value.version}";
+              src = builtins.fetchurl {
+                url = value.url;
+                sha256 = value.sha256;
+              };
+              version = value.version;
+              buildInputs = with pkgs; [
+                alsa-lib
+                fontconfig
+                freetype
+                stdenv.cc.cc.lib
+                xorg.libX11
+                xorg.libXext
+                xorg.libXi
+                xorg.libXrender
+                xorg.libXtst
+                zlib
+              ];
+              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 {} \;
+              '';
+            }
+          )
+          sources.${system}.versions;
+
+        packages.jdk = self.packages.jdks.18;
+        packages.jdk-lts = self.packages.jdks.17;
+        packages.jdk18 = self.packages.jdks.18;
+        packages.jdk17 = self.packages.jdks.17;
+        packages.jdk16 = self.packages.jdks.16;
+        packages.jdk11 = self.packages.jdks.11;
+
+        defaultPackage = self.packages.jdks.18;
+        });
         }

result

@@ -0,0 +1 @@
+/nix/store/j8c42s14ri5kryqz5fjcjqd736z73bpi-jdk11.0.13+8

sources.json

@@ -1,5 +1,5 @@
 {
-  "x86_64-unknown-linux-gnu": {
+  "x86_64-linux": {
     "versions": {
       "17": {
         "major_version": "17",

updater/src/main.rs

@@ -30,7 +30,7 @@ fn main() -> Result<()> {
         sources.add_release(&version, &url)?;
     }
     let mut output: HashMap<String, Sources> = HashMap::new();
-    output.insert("x86_64-unknown-linux-gnu".to_string(), sources);
+    output.insert("x86_64-linux".to_string(), sources);
     let json_output =
         serde_json::to_string_pretty(&output).context("Failed to serialize output")?;
     println!("{}", json_output);