Fixes #6 - Add trigger workflow (#11)

.github/workflows/trigger.yml

@@ -0,0 +1,35 @@
+name: trigger
+on: 
+  workflow_dispatch:
+    inputs:
+      branch:
+        description: 'Branch to release from'
+        required: true
+        default: 'current'
+      version:
+        description: 'Release version'
+        required: true
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v3
+      with:
+        token: ${{ secrets.GIT_TOKEN }}
+    - name: Release from given branch with given version
+      run: |
+        git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
+        BRANCH=${{ github.event.inputs.branch }}
+        VERSION=${{ github.event.inputs.version }}
+        echo "Releasing $VERSION from $BRANCH branch"
+        git checkout $BRANCH
+        git checkout -b release
+        mvn -B versions:set versions:commit -DnewVersion=$VERSION
+        git config --global user.email "noreply@manorrock.com"
+        git config --global user.name "Automated release"
+        git commit -a -m "Releasing version $VERSION"
+        git tag v$VERSION -f
+        git push origin v$VERSION -f
+        git checkout $BRANCH
+        git branch -D release