ci: Extract branch publishing into separate workflow

.github/workflows/canary.yaml

@@ -7,12 +7,11 @@ on:
       - completed
 env:
   NODE_VERSION_USED_FOR_DEVELOPMENT: 17
-  CI_WORKFLOW_ID: ${{github.event.workflow_run.id}}
 jobs:
   publish-canary:
     runs-on: ubuntu-latest
     name: Publish Canary
-    if: ${{ github.event.workflow_run.event == 'pull_request' }}
+    if: github.event.workflow_run.event == 'pull_request'
     steps:
       - name: Checkout repo
         uses: actions/checkout@v2
@@ -27,18 +26,17 @@ jobs:
           # 'registry-url' is required for 'npm publish'
           registry-url: 'https://registry.npmjs.org'
 
-      - name: Install Dependencies
-        run: npm ci --ignore-scripts
-
       - name: Download event.json
-        run: gh run download "$CI_WORKFLOW_ID" -n event.json
+        run: gh run download "$WORKFLOW_ID" -n event.json
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          WORKFLOW_ID: ${{github.event.workflow_run.id}}
 
       - name: Download NPM package artifact
-        run: gh run download "$CI_WORKFLOW_ID" -n npmDist -D npmDist
+        run: gh run download "$WORKFLOW_ID" -n npmDist -D npmDist
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          WORKFLOW_ID: ${{github.event.workflow_run.id}}
 
       - name: Modify NPM package to be canary release
         uses: actions/github-script@v5

.github/workflows/cd.yml

@@ -0,0 +1,29 @@
+name: CD
+on:
+  workflow_run:
+    workflows:
+      - CI
+    types:
+      - completed
+    branches:
+      - main
+jobs:
+  deploy-to-npm-branch:
+    name: Deploy to `npm` branch
+    if: github.event.workflow_run.event == 'push'
+    uses: ./.github/workflows/deploy-artifact-as-branch.yml
+    with:
+      workflow_id: ${{github.event.workflow_run.id}}
+      artifact_name: npmDist
+      target_branch: npm
+      commit_message: "Deploy ${{github.event.workflow_run.head_sha}} to 'npm' branch"
+
+  deploy-to-deno-branch:
+    name: Deploy to `deno` branch
+    if: github.event.workflow_run.event == 'push'
+    uses: ./.github/workflows/deploy-artifact-as-branch.yml
+    with:
+      workflow_id: ${{github.event.workflow_run.id}}
+      artifact_name: denoDist
+      target_branch: deno
+      commit_message: "Deploy ${{github.event.workflow_run.head_sha}} to 'deno' branch"

.github/workflows/ci.yml

@@ -246,8 +246,8 @@ jobs:
           path: ./npm-dist-diff.html
           if-no-files-found: ignore
 
-  build-npm-package:
-    name: Build artifact with NPM package
+  build-npm-dist:
+    name: Build 'npmDist' artifact
     runs-on: ubuntu-latest
     needs: [test, fuzz, lint, integrationTests]
     steps:
@@ -268,52 +268,16 @@ jobs:
       - name: Build NPM package
         run: npm run build:npm
 
-      - name: Upload NPM package
+      - name: Upload npmDist package
         uses: actions/upload-artifact@v2
         with:
           name: npmDist
           path: ./npmDist
 
-  deploy-to-npm-branch:
-    name: Deploy to `npm` branch
+  build-deno-dist:
+    name: Build 'denoDist' artifact
     runs-on: ubuntu-latest
-    if: |
-      github.event_name == 'push' &&
-      github.repository == 'graphql/graphql-js' &&
-      github.ref == 'refs/heads/main'
-    needs: [test, fuzz, lint, checkForCommonlyIgnoredFiles, integrationTests]
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2
-        with:
-          persist-credentials: false
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v2
-        with:
-          cache: npm
-          node-version: ${{ env.NODE_VERSION_USED_FOR_DEVELOPMENT }}
-
-      - name: Install Dependencies
-        run: npm ci --ignore-scripts
-
-      - name: Build NPM package
-        run: npm run build:npm
-
-      - name: Deploy to `npm` branch
-        uses: ./.github/actions/deploy-dir-as-branch
-        with:
-          src_dir: npmDist
-          target_branch: npm
-
-  deploy-to-deno-branch:
-    name: Deploy to `deno` branch
-    runs-on: ubuntu-latest
-    if: |
-      github.event_name == 'push' &&
-      github.repository == 'graphql/graphql-js' &&
-      github.ref == 'refs/heads/main'
-    needs: [test, fuzz, lint, checkForCommonlyIgnoredFiles, integrationTests]
+    needs: [test, fuzz, lint, integrationTests]
     steps:
       - name: Checkout repo
         uses: actions/checkout@v2
@@ -332,13 +296,13 @@ jobs:
       - name: Build Deno package
         run: npm run build:deno
 
-      - name: Deploy to `deno` branch
-        uses: ./.github/actions/deploy-dir-as-branch
+      - name: Upload denoDist package
+        uses: actions/upload-artifact@v2
         with:
-          src_dir: denoDist
-          target_branch: deno
+          name: denoDist
+          path: ./denoDist
 
-  build-website:
+  build-website-dist:
     name: Build website
     runs-on: ubuntu-latest
     steps:
@@ -358,3 +322,9 @@ jobs:
 
       - name: Build Docs
         run: npm run build:website
+
+      - name: Upload denoDist package
+        uses: actions/upload-artifact@v2
+        with:
+          name: websiteDist
+          path: ./websiteDist

.github/workflows/deploy-artifact-as-branch.yml

@@ -0,0 +1,51 @@
+name: Deploy specified artifact as a branch
+on:
+  workflow_call:
+    inputs:
+      workflow_id:
+        required: true
+        type: string
+      artifact_name:
+        required: true
+        type: string
+      target_branch:
+        required: true
+        type: string
+      commit_message:
+        required: true
+        type: string
+jobs:
+  deploy-artifact-as-branch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout `${{ inputs.target_branch }}` branch
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ inputs.target_branch }}
+
+      - name: Remove existing files first
+        run: git rm -r .
+
+      - name: Download artifact into cloned branch
+        run: gh run download "$WORKFLOW_ID" -n "$ARTIFACT_NAME"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          WORKFLOW_ID: ${{ inputs.workflow_id }}
+          ARTIFACT_NAME: ${{ inputs.artifact_name }}
+
+      - name: Publish target branch
+        run: |
+          git add -A
+          if git diff --staged --quiet; then
+            echo 'Nothing to publish'
+          else
+            git config user.name 'GitHub Action Script'
+            git config user.email 'please@open.issue'
+
+            git commit -a -m "$COMMIT_MESSAGE"
+            git push
+            echo 'Pushed'
+          fi
+        env:
+          TARGET_BRANCH: ${{ inputs.target_branch }}
+          COMMIT_MESSAGE: ${{ inputs.commit_message }}