[infra] Cloud Build/Run artifact cleanup (#831)

* Add cleanup script as private package
* Add cloudbuild yaml file to run script on trigger

Author: augustjk

cloudbuild-cleanup.yaml

@@ -0,0 +1,25 @@
+# lit.dev Cloud Build config for cleanup of build artifacts
+#
+# https://cloud.google.com/cloud-build/docs/build-config
+
+steps:
+  - id: cleanup
+    name: node:16
+    script: |
+      cd packages/lit-dev-cloudbuild-cleanup
+      npm ci
+      npm run build
+      npm start
+    env:
+      - 'PROJECT_ID=$PROJECT_ID'
+      - 'REPO_NAME=$REPO_NAME'
+      - '_DEPLOY_REGION=$_DEPLOY_REGION'
+
+tags:
+  - lit-dev
+  - cloudbuild-cleanup
+
+options:
+  machineType: 'N1_HIGHCPU_8'
+
+timeout: 45m

cloudbuild-main.yaml

@@ -37,6 +37,8 @@ steps:
       - '--image=$_GCR_HOSTNAME/$PROJECT_ID/$REPO_NAME/lit-dev:$COMMIT_SHA'
       - '--quiet'
       - '--no-traffic'
+      # If this tag format changes, also update route-traffic- steps below and
+      # the cleanup script in packages/lit-dev-cloudbuild-cleanup/src/cleanup.ts
       - '--tag=main-$SHORT_SHA'
       # IMPORTANT: If you change --memory, be sure to also change
       # --max-old-space-size in ./Dockerfile, and this same flag in
@@ -70,6 +72,8 @@ steps:
       - '--image=$_GCR_HOSTNAME/$PROJECT_ID/$REPO_NAME/lit-dev:$COMMIT_SHA'
       - '--quiet'
       - '--no-traffic'
+      # If this tag format changes, also update route-traffic- steps below and
+      # the cleanup script in packages/lit-dev-cloudbuild-cleanup/src/cleanup.ts
       - '--tag=main-$SHORT_SHA'
       # IMPORTANT: If you change --memory, be sure to also change
       # --max-old-space-size in ./Dockerfile, and this same flag in
@@ -119,8 +123,8 @@ steps:
       - beta
       - run
       - services
-      - update-traffic # Service name
-      - lit-dev-playground
+      - update-traffic
+      - lit-dev-playground # Service name
       - '--region=$_DEPLOY_REGION'
       - '--platform=managed'
       - '--quiet'

cloudbuild-pr.yaml

@@ -22,6 +22,8 @@ steps:
       - --cache=true
       - --cache-ttl=168h # 1 week
       - --build-arg=LITDEV_ENV=pr
+      # If this tag format changes, also update the cleanup script in
+      # packages/lit-dev-cloudbuild-cleanup/src/cleanup.ts
       - --build-arg=REVISION_TAG=pr$_PR_NUMBER-$SHORT_SHA
       - --build-arg=SHORT_SHA=$SHORT_SHA
 
@@ -42,6 +44,8 @@ steps:
       - '--image=$_GCR_HOSTNAME/$PROJECT_ID/$REPO_NAME/lit-dev:$COMMIT_SHA'
       - '--quiet'
       - '--no-traffic'
+      # If this tag format changes, also update the cleanup script in
+      # packages/lit-dev-cloudbuild-cleanup/src/cleanup.ts
       - '--tag=pr$_PR_NUMBER-$SHORT_SHA'
       # IMPORTANT: If you change --memory, be sure to also change
       # --max-old-space-size in ./Dockerfile, and this same flag in
@@ -75,6 +79,8 @@ steps:
       - '--image=$_GCR_HOSTNAME/$PROJECT_ID/$REPO_NAME/lit-dev:$COMMIT_SHA'
       - '--quiet'
       - '--no-traffic'
+      # If this tag format changes, also update the cleanup script in
+      # packages/lit-dev-cloudbuild-cleanup/src/cleanup.ts
       - '--tag=pr$_PR_NUMBER-$SHORT_SHA'
       # IMPORTANT: If you change --memory, be sure to also change
       # --max-old-space-size in ./Dockerfile, and this same flag in