Add check job to CI

.github/workflows/ci.yml

@@ -30,6 +30,24 @@ jobs:
           version: latest
           args: build --snapshot --skip-post-hooks
 
+  check:
+    runs-on: ubuntu-18.04
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Unshallow
+        run: git fetch --prune --unshallow
+      -
+        name: Set up Go
+        uses: actions/setup-go@v1
+        with: # Ideally this should be picked up from .go-version rather than hard-coded
+          go-version: 1.14.1
+      -
+        name: Run fmt check
+        run: make fmtcheck
+
   test:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -53,9 +71,6 @@ jobs:
       -
         name: Go mod verify
         run: go mod verify
-      -
-        name: Run fmt check
-        run: make fmtcheck
       -
         name: Run tests
         run: make test

Makefile

@@ -6,7 +6,7 @@ fmt:
 	@gofmt -s -w $(SOURCE_FILES)
 
 fmtcheck:
-	@gofmt -s -l $(SOURCE_FILES) | grep ".*\.go"; if [ $$? -eq 0 ]; then exit 1; fi
+	@gofmt -s -l $(SOURCE_FILES) | grep ^; if [ $$? -eq 0 ]; then exit 1; fi
 
 test:
 	go test -mod=vendor ./...