Setup rtx support (#46)

.github/workflows/java-build.yml

@@ -0,0 +1,34 @@
+name: Build Java packages
+
+on:
+  push:
+    branches:
+      - 'master'
+    paths-ignore:
+      - '*.md'
+      - '.gitignore'
+  pull_request:
+    paths-ignore:
+      - '*.md'
+      - '.gitignore'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macOS-latest, ubuntu-latest]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup rtx
+        uses: jdx/rtx-action@v1
+      - name: Make Maven Wrapper executable
+        if: contains(matrix.os, 'win') == false
+        run: chmod +x mvnw
+      - name: Package v1
+        run: ./mvnw --file wgtwo/pom-v1.xml package
+      - name: Package v0
+        run: ./mvnw --file wgtwo/pom-v0.xml package

.rtx.toml

@@ -0,0 +1,3 @@
+[tools]
+java = "corretto-21"
+buf = "latest"

README.md

@@ -98,15 +98,16 @@ We do include generated go code as part of this repo, which is generated by Buf
 
 1. `buf generate`
 
-## Buf and other required tooling
+## Required tooling
 
-Building the FileDescriptorSet and Go code requires some tooling:
+1. Building image.bin and generating go code requires [buf](https://docs.buf.build/installation).
+2. Building the Java code requires a compatible Java version
 
-1. `buf` (https://docs.buf.build/installation)
-2. `protoc-gen-go` (https://pkg.go.dev/google.golang.org/protobuf)
-2. `protoc-gen-go-grpc` (https://pkg.go.dev/google.golang.org/grpc/cmd/protoc-gen-go-grpc)
+### `rtx`
 
-We have [Hermit](https://github.com/cashapp/hermit) support, which will provide the required packages.
+We do recommend using [rtx](https://github.com/jdx/rtx) for managing these dependencies.
+
+If `rtx` is installed, the required tooling should be automatically picked up from [.rtx.toml](.rtx.toml).
 
 ## NPM package