Add workflow for creating release branches

This change adds a GitHub Actions workflow for creating release branches
with steps to generate the THIRD_PARTY_LICENSES file and updates the
getting started guide with the new release version.

Signed-off-by: Austin Vazquez <[email protected]>

.github/actions/update-getting-started/action.yml

@@ -0,0 +1,17 @@
+name: "Update getting started version"
+description: "Reusable action to update the getting started version"
+inputs:
+  version:
+    required: true
+    description: "Recommended SOCI version"
+
+runs:
+  using: composite
+  steps:
+    - name: "Update getting started version"
+      shell: bash
+      run: |
+        version=${{ inputs.version }}
+        version=${version/v/} # strip prefix v if not already stripped
+        sed -i -E "s/version=\"([0-9]+\.){2}[0-9]+\"/version=\"${version}\"/" docs/getting-started.md
+        git diff

.github/workflows/create-release-branch.yml

@@ -0,0 +1,84 @@
+name: Create release branch
+
+on:
+  workflow_dispatch:
+    inputs:
+      major_minor_version:
+        description: |
+          Major.Minor release version
+          (e.g. 0.6)
+        required: true
+      base_commit:
+        description: |
+          Base commit SHA
+          (e.g. be8940b39667bc3975cf7ea8a71177e4bfb5f6e0)
+        required: true
+  pull_request:
+    branches: ['main']
+    paths:
+      - '.github/workflows/create-release-branch.yml'
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  create-branch:
+    runs-on: ubuntu-20.04
+    env:
+      MAJOR_MINOR_VERSION: ''
+      BASE_COMMIT: ''
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Mock workflow inputs on pull request
+        if: github.event_name == 'pull_request'
+        run: |
+          echo "MAJOR_MINOR_VERSION=pr.${{ github.event.pull_request.number }}" >> $GITHUB_ENV
+          echo "BASE_COMMIT=${{ github.event.pull_request.head.sha }}" >> $GITHUB_ENV
+
+      - name: Set environment variables for workflow
+        if: github.event_name == 'workflow_dispatch'
+        run: |
+          echo "MAJOR_MINOR_VERSION=${{ github.event.inputs.major_minor_version }}" >> $GITHUB_ENV
+          echo "BASE_COMMIT=${{ github.event.inputs.base_commit }}" >> $GITHUB_ENV
+
+      - name: Create release branch
+        run: git checkout -b release/${{ env.MAJOR_MINOR_VERSION }} ${{ env.BASE_COMMIT }}
+
+      - name: Push new release branch
+        if: github.event_name == 'workflow_dispatch'
+        run: git push origin release/${{ env.MAJOR_MINOR_VERSION }}
+
+      - uses: ./.github/actions/update-getting-started
+        with:
+          version: ${{ env.MAJOR_MINOR_VERSION }}.0
+
+      - uses: actions/setup-go@v5
+
+      - name: Install go-licenses
+        run: go install github.com/google/[email protected]
+
+      - name: Generate third party licenses file
+        run: scripts/build-third-party-licenses.sh
+
+      - name: Create PR
+        if: github.event_name == 'workflow_dispatch'
+        uses: peter-evans/create-pull-request@v6
+        with:
+          title: 'Prepare release ${{ env.MAJOR_MINOR_VERSION }}'
+          commit-message: |
+            Prepare release ${{ env.MAJOR_MINOR_VERSION }}
+
+            This change adds the THIRD_PARTY_LICENSES file and updates the getting started guide for release/${{ env.MAJOR_MINOR_VERSION }}.
+          body: |
+            This change adds the THIRD_PARTY_LICENSES file and updates the getting started guide for release/${{ env.MAJOR_MINOR_VERSION }}.
+
+            Auto-generated by [create-pull-request](https://github.com/peter-evans/create-pull-request)
+          labels: easy-to-review, automated-pr
+          token: ${{ secrets.GITHUB_TOKEN }}
+          author: "GitHub <[email protected]>"
+          signoff: true
+          branch: 'create-pull-request/prepare-release-${{ env.MAJOR_MINOR_VERSION }}'
+          base: 'release/${{ env.MAJOR_MINOR_VERSION }}'
+          delete-branch: true

.github/workflows/update-getting-started-guide.yml

@@ -16,24 +16,21 @@ jobs:
   update-version:
     runs-on: ubuntu-20.04
     env:
-      RELEASE_TAG: ''
+      RELEASE_VERSION: ''
     steps:
       - uses: actions/checkout@v4
 
       - name: Mock release tag on pull request
         if: github.event_name == 'pull_request'
-        run: echo "RELEASE_TAG=v0.0.0-${{ github.event.pull_request.number }}" >> $GITHUB_ENV
+        run: echo "RELEASE_VERSION=v0.0.0-${{ github.event.pull_request.number }}" >> $GITHUB_ENV
 
       - name: Set published release tag
         if: github.event_name == 'release'
-        run: echo "RELEASE_TAG=${{ github.event.release.tag_name }}" >> $GITHUB_ENV
-
-      - name: Update getting started version
-        run: |
-          release_tag=${{ env.RELEASE_TAG }}
-          release_version=${release_tag/v/}
-          sed -i -E "s/version=\"([0-9]+\.){2}[0-9]+\"/version=\"${release_version}\"/" docs/getting-started.md
-          git diff
+        run: echo "RELEASE_VERSION=${{ github.event.release.tag_name }}" >> $GITHUB_ENV
+
+      - uses: ./.github/actions/update-getting-started
+        with:
+          version: ${{ env.RELEASE_VERSION }}
 
       - name: Create PR
         if: github.event_name == 'release'