chore: 🔧 filter coverage inclusions to a sensible state

Author: cif

src/action.ts

@@ -123,7 +123,9 @@ async function run(): Promise<void> {
     // Read coverage file
     const coverageFilePath = path.resolve(coverageFile);
     if (!fs.existsSync(coverageFilePath)) {
-      core.setFailed(`Coverage file not found: ${coverageFilePath}`);
+      core.setFailed(
+        `coverage-summary.json file not found at path ${coverageFilePath}. Did you forget to add the reporter in your vitest.config.js?`
+      );
       return;
     }
 

vitest.config.js

@@ -7,6 +7,15 @@ export default defineConfig({
       provider: "v8",
       reporter: ["text", "json"],
       reportsDirectory: "./coverage",
+      clean: true,
+      include: ["test-src/**/*", "src/v8.json.summary.reporter.ts"],
+      exclude: [
+        "src/action.ts",
+        "action.ts",
+        "**/*.d.ts",
+        "dist/**",
+        "node_modules/**",
+      ],
     },
     reporters: ["default", new V8JSONSummaryReporter()],
   },