[CI][packaging] Automate process of deploying a new release with Github actions

.github/workflows/deploy-maven-central.yml

@@ -5,14 +5,22 @@ on:
     tags:
       - 'v*'
       - '[0-9]+.[0-9]+.[0-9]+*'
+  workflow_run:
+    workflows: ["Finalize GPULlama3 Release"]
+    types: [completed]
   workflow_dispatch:
     inputs:
+      tag:
+        description: 'Tag to deploy (e.g., v0.2.3) - leave empty to deploy latest tag'
+        required: false
+        type: string
       dry_run:
         description: 'Dry run (skip actual deploy)'
         required: false
         default: false
         type: boolean
 
+
 jobs:
   deploy:
     name: Deploy to Maven Central
@@ -85,4 +93,18 @@ jobs:
             --batch-mode
         env:
           GPG_KEYNAME: ${{ secrets.GPG_KEYNAME }}
-          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+
+      - name: Deployment Summary
+        if: ${{ !inputs.dry_run }}
+        run: |
+          echo "## 🚀 Maven Central Deployment" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Detail | Value |" >> $GITHUB_STEP_SUMMARY
+          echo "|--------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Version | ${{ steps.version.outputs.version }} |" >> $GITHUB_STEP_SUMMARY
+          echo "| GroupId | io.github.beehive-lab |" >> $GITHUB_STEP_SUMMARY
+          echo "| ArtifactId | gpu-llama3 |" >> $GITHUB_STEP_SUMMARY
+          echo "| Status | ✅ Deployed |" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "📍 [View on Maven Central](https://central.sonatype.com/artifact/io.github.beehive-lab/gpu-llama3/${{ steps.version.outputs.version }})" >> $GITHUB_STEP_SUMMARY

.github/workflows/finalize-release.yml

@@ -0,0 +1,150 @@
+name: Finalize GPULlama3 Release
+
+on:
+  pull_request:
+    types: [closed]
+    branches: [main]
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Release version to tag (e.g., 0.2.3)'
+        required: true
+        type: string
+
+jobs:
+  create-release-tag:
+    # Run when release PR merges OR manual trigger
+    if: |
+      (github.event.pull_request.merged == true && startsWith(github.event.pull_request.head.ref, 'release/')) ||
+      github.event_name == 'workflow_dispatch'
+    runs-on: [self-hosted, Linux, x64]
+    permissions:
+      contents: write
+    timeout-minutes: 10
+
+    outputs:
+      version: ${{ steps.get_version.outputs.version }}
+
+    steps:
+      - name: Get version
+        id: get_version
+        run: |
+          if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+            echo "version=${{ inputs.version }}" >> $GITHUB_OUTPUT
+          else
+            BRANCH="${{ github.event.pull_request.head.ref }}"
+            echo "version=${BRANCH#release/}" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Checkout main
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.tag || github.ref }}
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Create and push tag
+        run: |
+          VERSION="${{ steps.get_version.outputs.version }}"
+          git tag -a "v${VERSION}" -m "Release ${VERSION}"
+          git push origin "v${VERSION}"
+          echo "✅ Created tag v${VERSION}"
+
+      - name: Extract changelog for release notes
+        id: changelog
+        run: |
+          VERSION="${{ steps.get_version.outputs.version }}"
+          CHANGELOG_FILE="CHANGELOG.md"
+
+          if [ -f "$CHANGELOG_FILE" ]; then
+            # Extract section for this version
+            awk -v ver="## \\[${VERSION}\\]" '
+              $0 ~ ver { found=1; next }
+              found && /^## \[/ { exit }
+              found { print }
+            ' "$CHANGELOG_FILE" > /tmp/release_notes.txt
+
+            if [ -s /tmp/release_notes.txt ]; then
+              echo "Found changelog section for ${VERSION}"
+            else
+              echo "See CHANGELOG.md for details." > /tmp/release_notes.txt
+            fi
+          else
+            echo "See commit history for changes." > /tmp/release_notes.txt
+          fi
+
+      - name: Create GitHub Release
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const version = '${{ steps.get_version.outputs.version }}';
+
+            let releaseNotes;
+            try {
+              releaseNotes = fs.readFileSync('/tmp/release_notes.txt', 'utf8').trim();
+              if (!releaseNotes) {
+                releaseNotes = `Release ${version}`;
+              }
+            } catch (e) {
+              releaseNotes = `Release ${version}`;
+            }
+
+            // Add installation instructions
+            releaseNotes += `\n\n---\n\n### 📦 Installation\n\n`;
+            releaseNotes += `**Maven**\n\`\`\`xml\n<dependency>\n    <groupId>io.github.beehive-lab</groupId>\n    <artifactId>gpu-llama3</artifactId>\n    <version>${version}</version>\n</dependency>\n\`\`\`\n\n`;
+            releaseNotes += `**Gradle**\n\`\`\`groovy\nimplementation 'io.github.beehive-lab:gpu-llama3:${version}'\n\`\`\`\n\n`;
+            releaseNotes += `---\n\n📖 [Documentation](https://github.com/beehive-lab/GPULlama3.java#readme) | 🔗 [Maven Central](https://central.sonatype.com/artifact/io.github.beehive-lab/gpu-llama3/${version})`;
+
+            const { data: release } = await github.rest.repos.createRelease({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              tag_name: `v${version}`,
+              name: `GPULlama3.java ${version}`,
+              body: releaseNotes,
+              draft: false,
+              prerelease: false
+            });
+
+            console.log(`✅ Created release: ${release.html_url}`);
+
+      - name: Summary
+        run: |
+          VERSION="${{ steps.get_version.outputs.version }}"
+          echo "## 🎉 Release v${VERSION} Finalized" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Step | Status |" >> $GITHUB_STEP_SUMMARY
+          echo "|------|--------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Tag created | ✅ v${VERSION} |" >> $GITHUB_STEP_SUMMARY
+          echo "| GitHub Release | ✅ Created |" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### 🔄 Next:" >> $GITHUB_STEP_SUMMARY
+          echo "**Deploy to Maven Central** workflow will trigger automatically" >> $GITHUB_STEP_SUMMARY
+
+  cleanup-branch:
+    needs: create-release-tag
+    runs-on: [self-hosted, Linux, x64]
+    permissions:
+      contents: write
+    if: github.event_name == 'pull_request'
+
+    steps:
+      - name: Delete release branch
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const branch = '${{ github.event.pull_request.head.ref }}';
+            try {
+              await github.rest.git.deleteRef({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                ref: `heads/${branch}`
+              });
+              console.log(`✅ Deleted branch: ${branch}`);
+            } catch (e) {
+              console.log(`Could not delete branch: ${e.message}`);
+            }