Create PR from Action

.github/workflows/release-pr.yml

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+name: 'Create Release Pull Request'
+
+on:
+  create:
+    branches:
+      - releases/*
+
+jobs:
+  build:
+    name: Create Release Pull Request
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v2
+        if: ${{ !contains(github.ref, 'test') }}
+
+      - name: Create Pull Request content
+        if: ${{ !contains(github.ref, 'test') }}
+        run: |
+          PR_TITLE=`./script/draft-release/release-pr-content.sh title ${GITHUB_REF#refs/heads/}`
+          PR_BODY=`./script/draft-release/release-pr-content.sh body ${GITHUB_REF#refs/heads/}`
+
+          echo "PR_BODY<<EOF" >> $GITHUB_ENV
+          echo "$PR_BODY" >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+
+          echo "PR_TITLE<<EOF" >> $GITHUB_ENV
+          echo "$PR_TITLE" >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+
+      - uses: tibdex/github-app-token@v1
+        id: generate-token
+        if: ${{ !contains(github.ref, 'test') }}
+        with:
+          app_id: ${{ secrets.DESKTOP_RELEASES_APP_ID }}
+          private_key: ${{ secrets.DESKTOP_RELEASES_APP_PRIVATE_KEY }}
+
+      - name: Create Release Pull Request
+        uses: peter-evans/create-pull-request@v4.0.4
+        if: ${{ !contains(github.ref, 'test') }}
+        with:
+          token: ${{ steps.generate-token.outputs.token }}
+          title: ${{ env.PR_TITLE }}
+          body: ${{ env.PR_BODY }}
+          branch: ${{ github.ref }}
+          base: development
+          reviewers: desktop

script/draft-release/release-pr-content.sh

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+#!/bin/sh
+
+if [ "$#" -ne 2 ]; then
+  echo "Usage: $0 <title|body> <branch-name>"
+  exit 1
+fi
+
+OUTPUT_TYPE=$1
+BRANCH_NAME=$2
+VERSION=$(echo ${BRANCH_NAME#releases/})
+
+# For title just echo "Release version"
+if [ "$OUTPUT_TYPE" = "title" ]; then
+  echo "Release ${VERSION}"
+  exit 0
+fi
+
+# If output type is not body, exit
+if [ "$OUTPUT_TYPE" != "body" ]; then
+  echo "Unknown output type: $OUTPUT_TYPE"
+  exit 1
+fi
+
+RELEASE_DESCRIPTION="v${VERSION} production release"
+if [[ "$VERSION" == *"-"* ]]; then
+  BUILD_TYPE_AND_NUMBER=$(echo ${VERSION##*-})
+  if [[ "$BUILD_TYPE_AND_NUMBER" != *"beta" ]]; then
+    echo "Only beta and production builds have release PRs"
+  fi
+  BUILD_TYPE="beta"
+  BUILD_NUMBER=$(echo ${BUILD_TYPE_AND_NUMBER:4})
+  case $BUILD_NUMBER in
+    *1[0-9] | *[04-9]) BUILD_NUMBER_SUFFIX="th";;
+    *1) BUILD_NUMBER_SUFFIX="st";;
+    *2) BUILD_NUMBER_SUFFIX="nd";;
+    *3) BUILD_NUMBER_SUFFIX="rd";;
+  esac
+
+  RELEASE_DESCRIPTION="${BUILD_NUMBER}${BUILD_NUMBER_SUFFIX} beta of the v${VERSION} series"
+fi
+
+echo "## Description
+Looking for the PR for the upcoming ${RELEASE_DESCRIPTION}? Well, you've just found it, congratulations!
+
+## Release checklist
+
+- [ ] Check to see if there are any errors in Sentry that have only occurred since the last production release
+- [ ] Verify that all feature flags are flipped appropriately
+- [ ] If there are any new metrics, ensure that central and desktop.github.com have been updated"