Add linting as a build step in CI

Author: oalders

.github/workflows/test.yml

@@ -38,6 +38,11 @@ jobs:
         DEVEL_COVER_OPTIONS: '-ignore,^local/'
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+        if: matrix.resolver == 'snapshot'
+      - uses: actions/checkout@v4
+        if: matrix.resolver != 'snapshot'
       - uses: actions/setup-node@v4
         with:
           node-version: '18'
@@ -83,3 +88,14 @@ jobs:
         run: cover -report codecov
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+      - name: Install precious
+        run: ./bin/install-precious /usr/local/bin
+      - name: Fetch master
+        run: git fetch origin master:master
+        if: github.ref != 'refs/heads/master' && matrix.resolver == 'snapshot'
+      - name: Lint files in diff
+        run: precious lint -d master
+        if: github.ref != 'refs/heads/master' && matrix.resolver == 'snapshot'
+      - name: Lint all files
+        run: precious lint --all
+        if: github.ref != 'refs/heads/master' && matrix.resolver == 'snapshot'