Automation for new Truss releases (#578)

* New create_release_pr github action.

* Updated action.

* Add new action for merging to main.

Author: squidarth

.github/workflows/commit_new_release_to_main.yml

@@ -0,0 +1,31 @@
+name: Merge release into main
+
+on:
+  push:
+    branches:
+      - release
+
+jobs:
+  merge-to-main:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v2
+
+    - name: Configure Git user as baseten-bot
+      run: |
+        git config user.name "baseten-bot"
+        git config user.email "baseten-bot@baseten.co"
+
+    - name: Fetch all branches
+      run: |
+        git fetch --all
+
+    - name: Merge release into main with priority on main changes
+      run: |
+        git checkout main
+        git merge --strategy-option=ours release -m "Merge release into main prioritizing main changes"
+        git push origin main
+      env:
+        GH_TOKEN: ${{ secrets.BASETENBOT_GITHUB_TOKEN }}

.github/workflows/create_release_pr.yml

@@ -0,0 +1,50 @@
+name: Create Release PR
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to bump to'
+        required: true
+
+jobs:
+  bump_version:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Install poetry
+      run: |
+        curl -sSL https://install.python-poetry.org | python3 -
+
+    - name: Bump version in pyproject.toml
+      run: |
+        poetry version $INPUT_VERSION
+      env:
+        INPUT_VERSION: ${{ github.event.inputs.version }}
+
+
+    - name: Commit changes
+      run: |
+        git config --local user.email "baseten-bot@baseten.co"
+        git config --local user.name "baseten-bot"
+        git add pyproject.toml
+        git commit -m "Bump version to $INPUT_VERSION"
+      env:
+        INPUT_VERSION: ${{ github.event.inputs.version }}
+
+    # TODO: Also push changes to main
+    - name: Push changes to new branch
+      run: |
+        git push origin HEAD:refs/heads/bump-version-${{ github.event.inputs.version }}
+      env:
+        GH_TOKEN: ${{ secrets.BASETENBOT_GITHUB_TOKEN }}
+
+    - name: Make PR
+      run: |
+        PR_URL=gh pr create --base release --head refs/heads/bump-version-$INPUT_VERSION --title "Release $INPUT_VERSION"
+        gh pr merge $PR_URL --auto --merge
+      env:
+        INPUT_VERSION: ${{ github.event.inputs.version }}