Factor out a common action for setting up the test environment in Github Actions

Author: airhorns

.github/actions/setup-test-env/action.yml

@@ -0,0 +1,14 @@
+name: 'Setup test environment'
+description: ''
+inputs: {}
+outputs: {}
+runs:
+    using: "composite"
+    steps:
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+    - run: yarn install --frozen-lockfile
+      shell: "bash"

.github/workflows/ci.yml

@@ -12,29 +12,12 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v1
-
-      - name: Use Node.js
-        uses: actions/setup-node@v1
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - uses: actions/cache@v2
-        with:
-          path: ~/.npm
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-node-
-
-      - name: Install
-        run: yarn install --frozen-lockfile
-
+      - uses: actions/checkout@v2
+      - uses: ./.github/actions/setup-test-env
       - name: Build JS
         run: yarn build
-
       - name: Run Tests
         run: yarn run test
-
       - name: Run Lint
         run: yarn run lint
 

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2
       - uses: ./.github/actions/setup-test-env
       - name: Build all packages
         shell: nix develop -c bash -eo pipefail -l {0}