feat: add cdk8s java support

.github/workflows/release-java.yaml

@@ -0,0 +1,48 @@
+name: Create and publish a cdk8s-cmp-java Docker image
+
+on:
+  push:
+    tags:
+      - 'cdk8s-cmp-java/v*'
+env:
+  REGISTRY: ghcr.io
+  ACTOR: ${{ github.actor }}
+
+jobs:
+  build-and-push-image:
+    env:
+      IMAGE_NAME: cdk8s-cmp-java
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ env.ACTOR }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.ACTOR }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=match,pattern=v(.*),group=1
+          flavor: |
+            latest=auto
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: ./java
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+

README.md

@@ -6,8 +6,8 @@ This repository contains individual and all-in-one Docker images for [cdk8s](htt
 
 1. cdk8s Typescript
 2. cdk8s Python
-3. cdk8s Golang (Coming Soon)
-4. cdk8s Java (Coming Soon)
+3. cdk8s Golang 
+4. cdk8s Java
 5. cdk8s with all of the above languages support (Coming Soon)
 
 Read more in README in each individual folder.

java/Dockerfile

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+ARG NODE_VERSION=20.11.0
+ARG CDK8S_CLI_VERSION=2.198.36
+ARG ALPINE_VERSION=3.15
+
+FROM --platform=${BUILDPLATFORM} node:${NODE_VERSION}-alpine as node
+
+FROM alpine:${ALPINE_VERSION}
+
+USER root
+
+RUN addgroup -g 1000 argocd && \
+    adduser -S -u 999 -G argocd -h /home/argocd argocd && \
+    mkdir -p /home/argocd && \
+    chown argocd:0 /home/argocd && \
+    chmod g=u /home/argocd
+
+COPY --from=node /usr/lib /usr/lib
+COPY --from=node /usr/local/lib /usr/local/lib
+COPY --from=node /usr/local/include /usr/local/include
+COPY --from=node /usr/local/bin /usr/local/bin
+
+RUN apk add --no-cache \
+    openjdk11 \
+    maven
+
+RUN npm install -g cdk8s-cli@${CDK8S_CLI_VERSION}
+
+USER argocd
+
+WORKDIR /home/argocd

java/README.md

@@ -0,0 +1,47 @@
+# cdk8s Java CMP
+
+This generates kubernetes manifests using cdk8s in Java language. [Read more about cdk8s Java](https://cdk8s.io/docs/latest/get-started/java/)
+
+## Use-case
+
+When you have kubernetes manifests written in cdk8s Java and you want to turn it into raw YAML and provide ArgoCD to manage resources.
+
+Basically it requires 2 commands when generating raw YAML manifests
+
+1. Import cdk8s objects defined in cdk8s configuration YAML file and compile java
+
+```sh
+cdk8s import && mvn compile
+```
+
+2. Generate manifests and print to stdout
+
+```sh
+cdk8s synth --stdout
+```
+
+## Install and Use
+
+Register the plugin sidecar to `argocd-repo-server`
+
+```yaml
+containers:
+- name: cdk8s-java
+  image: ghcr.io/akuity/cdk8s-cmp-java:latest
+  ....
+```
+
+Apply [this plugin.yaml](./plugin.yaml) configuration. You can modify depending on your use-case (ie. for example injecting static or dynamic parameters).
+
+Use the plugin when you create an application.
+
+```yaml
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: guestbook
+spec:
+  source:
+    plugin:
+      name: cdk8s-java
+```

java/plugin.yaml

@@ -0,0 +1,14 @@
+apiVersion: argoproj.io/v1alpha1
+kind: ConfigManagementPlugin
+metadata:
+  name: cdk8s-java
+spec:
+  version: v1.0
+  init:
+    command: [sh, -c]
+    args: [cdk8s import && mvn compile]
+  generate:
+    command: [cdk8s, synth]
+    args: [--stdout]
+  discover:
+    fileName: "pom.xml"