ci: lint deno.json (#441)

.github/workflows/build.yml

@@ -35,11 +35,11 @@ jobs:
           deno task make_mod
           git diff --exit-code
           deno check mod.ts
-
-      - name: Run lint
+      - name: Run linters
         run: |
           deno fmt --check
           deno lint
+          deno task check:deno-json
       - name: Set up Redis ${{ matrix.redis }}
         uses: shogo82148/actions-setup-redis@v1
         with:

deno.json

@@ -13,6 +13,7 @@
     "exclude": ["benchmark/", "tmp/", "vendor/"]
   },
   "tasks": {
+    "check:deno-json": "deno run --allow-read=deno.json tools/check_deno_json.js",
     "test": "DENO_FUTURE=1 deno test --allow-net --allow-read=tests --allow-write=tests/tmp --allow-run=redis-server,redis-cli --coverage=coverage --trace-leaks",
     "test:doc": "deno test --doc --no-run --import-map=import_map.test.json",
     "coverage": "deno coverage ./coverage --lcov --output=coverage/lcov.info",

tools/check_deno_json.js

@@ -0,0 +1,22 @@
+import { dirname, join } from "node:path";
+
+const pathToDenoJSON = join(dirname(import.meta.dirname), "deno.json");
+const denoJSON = JSON.parse(await Deno.readTextFile(pathToDenoJSON));
+if (denoJSON.imports) {
+  // deno-lint-ignore no-console
+  console.error(
+    "`imports` should not be defined in `deno.json`. Use `import_map.test.json` instead.",
+  );
+  Deno.exit(1);
+}
+
+if (denoJSON.importMap) {
+  // deno-lint-ignore no-console
+  console.error(
+    "`importMap` should not be defined in `deno.json`. Use `import_map.test.json` instead.",
+  );
+  Deno.exit(1);
+}
+
+// deno-lint-ignore no-console
+console.info("✅ OK");