chore: add release action

.github/actions/build/action.yml

@@ -0,0 +1,27 @@
+name: Build plugin
+description: Builds the plugin
+inputs:
+  java_version:
+    required: true
+    description: Java version for building the plugin
+runs:
+  using: "composite"
+  steps:
+    - name: 'Set up JDK ${{ inputs.java_version }}'
+      uses: actions/setup-java@v3
+      with:
+        distribution: zulu
+        java-version: ${{ inputs.java_version }}
+    - name: Test
+      shell: bash
+      run: |
+        ./mvnw --color=always -B verify
+    - uses: actions/upload-artifact@v3
+      name: Attach generated update site as zip
+      if: runner.os == 'Linux'
+      with:
+        name: mat-calcite-plugin-update-site
+        # actions/upload-artifact always creates .zip, so we specify directory here to prevent double zip archiving
+        path: MatCalciteRepository/target/repository/*
+        # Default retention is 90 days, and we publish the archives to the update site anyway
+        retention-days: 4

.github/actions/cache/action.yml

@@ -0,0 +1,12 @@
+name: Caches Maven dependencies
+description: Caches Maven dependencies
+runs:
+  using: "composite"
+  steps:
+   - name: Cache local Maven repository
+     uses: actions/cache@v3
+     with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-

.github/workflows/main.yml

@@ -26,32 +26,14 @@ jobs:
     steps:
       - name: Checkout sources
         uses: actions/checkout@v4
-      - name: Cache local Maven repository
-        uses: actions/cache@v3
+      - name: Cache dependencies
+        uses: ./.github/actions/cache
+      - name: Build
+        uses: ./.github/actions/build
         with:
-          path: ~/.m2/repository
-          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
-          restore-keys: |
-            ${{ runner.os }}-maven-
-      - name: 'Set up JDK ${{ matrix.java }}'
-        uses: actions/setup-java@v3
-        with:
-          distribution: zulu
-          java-version: ${{ matrix.java }}
-      - name: Test
-        run: |
-          ./mvnw --color=always -B verify
-      - uses: actions/upload-artifact@v3
-        name: Attach generated update site as zip
-        if: matrix.os == 'ubuntu-latest'
-        with:
-          name: mat-calcite-plugin-update-site
-          # actions/upload-artifact always creates .zip, so we specify directory here to prevent double zip archiving
-          path: MatCalciteRepository/target/repository/*
-          # Default retention is 90 days, and we publish the archives to the update site anyway
-          retention-days: 4
+          java_version: ${{ matrix.java }}
       - name: Publish Eclipse update site
-        if: matrix.os == 'ubuntu-latest' && github.repository == 'vlsi/mat-calcite-plugin' && github.ref == 'refs/heads/main'
+        if: runner.os == 'Linux' && github.repository == 'vlsi/mat-calcite-plugin' && github.ref == 'refs/heads/main'
         uses: ./.github/actions/publish-update-site
         with:
           update_site_token:

.github/workflows/release.yml

@@ -0,0 +1,60 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      release_version:
+        description: 'Release version'
+        required: true
+      next_version:
+        description: 'Next version to set after release (without -SNAPSHOT)'
+        required: true
+
+jobs:
+  release-job:
+    permissions:
+      # For creating releases
+      contents: write
+    env:
+      RELEASE_VERSION: ${{ inputs.release_version }}
+      NEXT_VERSION: ${{ inputs.next_version }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+      - name: Cache dependencies
+        uses: ./.github/actions/cache
+      - name: Update version to stable
+        shell: bash
+        run: |
+          ./mvnw tycho-versions:set-version -DnewVersion=$RELEASE_VERSION
+          git add -u
+          git commit -m "Prepare for release v$RELEASE_VERSION"
+          git tag v$RELEASE_VERSION
+      - name: Build
+        uses: ./.github/actions/build
+        with:
+          java_version: ${{ matrix.java }}
+      - name: Publish release
+        uses: softprops/action-gh-release@de2c0eb89ae2a093876385947365aca7b0e5f844 # v1
+        with:
+          tag_name: v${{ inputs.next_version }}
+          generate_release_notes: true
+          draft: true
+          files: |
+            MatCalciteRepository/target/MatCalciteRepository*.zip
+      - name: Publish Eclipse update site
+        if: github.repository == 'vlsi/mat-calcite-plugin'
+        uses: ./.github/actions/publish-update-site
+        with:
+          update_site_token:
+            ${{ secrets.UPDATE_SITE_TOKEN }}
+      - name: Prepare for next development iteration
+        shell: bash
+        run: |
+          ./mvnw tycho-versions:set-version -DnewVersion=$NEXT_VERSION-SNAPSHOT
+          git add -u
+          git commit -m "Update version to $NEXT_VERSION-SNAPSHOT"
+          git push origin main v$RELEASE_VERSION
+
+