draft for unified gh workflow (starting with java)

.github/workflows/buf.yaml

@@ -0,0 +1,55 @@
+name: buf
+
+on:
+  push:
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  java:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: action/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+
+      - uses: bufbuild/buf-action@v1
+        with:
+          setup_only: true
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.BUF_TOKEN }}
+
+      - name: generate
+        run: make generate
+
+      - name: test
+        working-directory: java
+        run: ./gradlew clean build
+
+      - name: publish
+        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+        working-directory: java
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          RELEASE_TAG=${GITHUB_REF/refs\/tags\/v/}
+          echo $RELEASE_TAG
+          ./gradlew -Pversion=$RELEASE_TAG clean publish
+
+  buf:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: bufbuild/buf-action@v1
+        with:
+          token: ${{ secrets.BUF_TOKEN }}
+          setup_only: false
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          breaking_against: "https://github.com/stroeer/tapir.git#branch=main"