Add turbo caching to GH actions workflows

.github/workflows/build.yml

@@ -2,9 +2,6 @@ name: build
 
 on: [push, pull_request]
 
-env:
-  HUSKY: 0
-
 jobs:
   test:
     name: Build, lint, and test on Node.js ${{ matrix.node }}
@@ -12,22 +9,35 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [14.x, 16.x]
+        node: [14, 16]
 
     steps:
       - uses: actions/checkout@v2
 
       - name: Setup Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
+          cache: npm
 
       - name: Install npm@v7
         run: npm install -g npm@7
 
-      - name: Install dependencies and build packages
+      - name: Install dependencies
         run: npm ci
 
+      # Running this after `npm ci` because `npm ci` removes `node_modules`: 
+      - name: Download Turborepo cache
+        uses: actions/cache@v2
+        with:
+          path: node_modules/.cache/turbo
+          key: ${{ runner.os }}-node-${{ matrix.node }}-turbo-${{ hashFiles('node_modules/.cache/turbo') }}
+          restore-keys: |
+            ${{ runner.os }}-node-${{ matrix.node }}-turbo-
+
+      - name: Build packages
+        run: npm run build
+
       # TODO setup linting
       # - name: Lint
       #   run: npm run lint

.github/workflows/release.yml

@@ -1,8 +1,5 @@
 name: release
 
-env:
-  HUSKY: 0
-
 on:
   push:
     paths:
@@ -21,14 +18,26 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Setup Node.js 16.x
+      - name: Setup Node.js 16
         uses: actions/setup-node@v2
         with:
-          node-version: 16.x
+          node-version: 16
+          cache: npm
 
-      - name: Install dependencies and build packages
+      - name: Install dependencies
         run: npm install
 
+      - name: Download Turborepo cache
+        uses: actions/cache@v2
+        with:
+          path: node_modules/.cache/turbo
+          key: ${{ runner.os }}-node-16-turbo-${{ hashFiles('node_modules/.cache/turbo') }}
+          restore-keys: |
+            ${{ runner.os }}-node-16-turbo-
+
+      - name: Build packages
+        run: npm run build
+
       - name: Run tests
         run: npm run test -- --ci --maxWorkers=2
         env:

package.json

@@ -9,7 +9,7 @@
     "test:watch": "npm test -- --watch",
     "build": "turbo run build",
     "build:archive": "gulp createCoreDistArchive",
-    "prepare": "husky install && npm run build",
+    "prepare": "node -e 'process.exit(!process.env.CI)' || (husky install && npm run build)",
     "tsc": "turbo tsc",
     "changeset": "changeset",
     "release": "changeset publish"
@@ -47,6 +47,7 @@
   },
   "turbo": {
     "baseBranch": "origin/main",
+    "npmClient": "npm",
     "pipeline": {
       "build": {
         "dependsOn": [