Configure Kaniko to cache build deps

cloud-build/Dockerfile

@@ -14,12 +14,21 @@
 
 FROM node:latest
 
-# Download nad install Chrome. We don't actually use Chrome directly, but
-# this is the easiest way to ensure all of its latest dependencies are
-# installed.
+# Download and install Chrome. We don't actually use Chrome directly, but
+# Puppeteers needs several libraries that Chrome depends on, and this is the
+# easiest way to ensure all of its latest dependencies are installed.
 RUN wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb \
     && apt-get update \
     && apt -y install ./google-chrome-stable_current_amd64.deb \
     && rm google-chrome-stable_current_amd64.deb \
-    && rm -rf /var/lib/apt/lists/* \
-    && npm install node-pre-gyp -g
+    && rm -rf /var/lib/apt/lists/*
+
+# Pre-install deps required to build and test Ground Firestore Cloud Functions.
+WORKDIR /workspace/functions
+COPY functions/package*.json ./
+RUN npm install
+
+# Pre-install deps required to build and test the Ground web console.
+WORKDIR /workspace/web-ng
+COPY web-ng/package*.json ./
+RUN npm install

cloudbuild.yaml

@@ -12,56 +12,35 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Initialize gcloud via CLI
-# $ gcloud init
-#
-# Steps (1, 2, 3, and 4 run simultaneously):
-# ==========================================
-# 1. Install npm packages for functions
-# 2. Install npm packages for web-ng 
-#      |
-#      |
-#      3. Run lint checks
-#      4. Run unit tests
+# This build is run automatically on pushes and pull requests.
 
-steps:
+# The first time the Docker image is created, the total build time can exceed
+# the 10 min default. Increase the max. build time to 16 min to prevent timeouts.
+timeout: 900s
 
-  # Install node packages for functions
-  - name: 'gcr.io/ground-android-gcb/node-chrome'
-    id: 'Install npm packages for functions'
-    waitFor: ['-']
-    entrypoint: 'bash'
-    args:
-     - '-c'
-     - |
-       cd functions && npm install
-
-  # Install node packages for web-ng
-  - name: 'gcr.io/ground-android-gcb/node-chrome'
-    id: &install_web_ng 'Install npm packages for web-ng'
-    waitFor: ['-']
-    entrypoint: 'bash'
+# Build Docker image and run checks and tests. See name property of each step
+# for description.
+steps:
+  - name: "gcr.io/kaniko-project/executor:v0.22.0"
+    id: "Rebuild Docker image with deps as needed"
     args:
-     - '-c'
-     - |
-       cd web-ng && npm install
+      - --destination=gcr.io/$PROJECT_ID/ground-platform-build
+      - --dockerfile=cloud-build/Dockerfile
+      - --cache=true
+      - -v=debug
 
-  # Run eslint for web-ng
-  - name: 'gcr.io/ground-android-gcb/node-chrome'
-    id: 'Run lint checks for web-ng'
-    waitFor: [*install_web_ng]
-    entrypoint: 'bash'
+  - name: "gcr.io/$PROJECT_ID/ground-platform-build"
+    id: "Run lint checks for web-ng"
+    entrypoint: "bash"
     args:
-     - '-c'
-     - |
-       cd web-ng && npm run check
+      - "-c"
+      - |
+        cd web-ng && npm run check
 
-  # Run tests for web-ng
-  - name: 'gcr.io/ground-android-gcb/node-chrome'
-    id: 'Run tests for web-ng'
-    waitFor: [*install_web_ng]
-    entrypoint: 'bash'
+  - name: "gcr.io/$PROJECT_ID/ground-platform-build"
+    id: "Run tests for web-ng"
+    entrypoint: "bash"
     args:
-     - '-c'
-     - |
-       cd web-ng && npm run test
+      - "-c"
+      - |
+        cd web-ng && npm run test