Add webdriver-io plugin

packages/knip/fixtures/plugins/webdriver-io/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "@fixtures/webdriver-io",
+  "version": "*",
+  "scripts": {
+    "test": "wdio"
+  },
+  "dependencies": {
+    "@wdio/cli": "*",
+    "@wdio/mocha-framework": "*",
+    "@wdio/concise-reporter": "*",
+    "@wdio/browser-runner": "*"
+  }
+}

packages/knip/fixtures/plugins/webdriver-io/wdio.conf.js

@@ -0,0 +1,5 @@
+exports.config = {
+  runner: ['browser', {}],
+  framework: 'mocha',
+  reporters: ['concise'],
+};

packages/knip/package.json

@@ -90,6 +90,7 @@
     "@types/picomatch": "2.3.3",
     "@types/resolve": "^1.20.6",
     "@types/webpack": "^5.28.5",
+    "@wdio/types": "^8.38.2",
     "glob": "^10.3.12",
     "playwright": "^1.44.1",
     "release-it": "^17.3.0",

packages/knip/schema.json

@@ -519,6 +519,10 @@
           "title": "vue plugin configuration (https://knip.dev/reference/plugins/vue)",
           "$ref": "#/definitions/plugin"
         },
+        "webdriver-io": {
+          "title": "webdriver-io plugin configuration (https://knip.dev/reference/plugins/webdriver-io)",
+          "$ref": "#/definitions/plugin"
+        },
         "webpack": {
           "title": "Webpack plugin configuration (https://knip.dev/reference/plugins/webpack)",
           "$ref": "#/definitions/plugin"

packages/knip/src/ConfigurationValidator.ts

@@ -138,6 +138,7 @@ const pluginsSchema = z.object({
   vue: pluginSchema,
   vite: pluginSchema,
   vitest: pluginSchema,
+  'webdriver-io': pluginSchema,
   webpack: pluginSchema,
   wireit: pluginSchema,
   wrangler: pluginSchema,

packages/knip/src/plugins/index.ts

@@ -60,6 +60,7 @@ export { default as vercelOg } from './vercel-og/index.js';
 export { default as vite } from './vite/index.js';
 export { default as vitest } from './vitest/index.js';
 export { default as vue } from './vue/index.js';
+export { default as webdriverIo } from './webdriver-io/index.js';
 export { default as webpack } from './webpack/index.js';
 export { default as wireit } from './wireit/index.js';
 export { default as wrangler } from './wrangler/index.js';

packages/knip/src/plugins/webdriver-io/index.ts

@@ -0,0 +1,45 @@
+import type { IsPluginEnabled, Plugin, ResolveConfig } from '#p/types/plugins.js';
+import { hasDependency } from '#p/util/plugin.js';
+import type { WebdriverIOConfig } from './types.js';
+
+// https://webdriver.io/docs/configuration
+
+const title = 'WebdriverIO';
+
+const enablers = ['@wdio/cli'];
+
+const isEnabled: IsPluginEnabled = ({ dependencies }) => hasDependency(dependencies, enablers);
+
+const config = ['wdio.conf.js'];
+
+const resolveConfig: ResolveConfig<WebdriverIOConfig> = async config => {
+  const cfg = config?.config;
+  if (!cfg) return [];
+
+  const frameworks = cfg?.framework ? [`@wdio/${cfg.framework}-framework`] : [];
+
+  const runners =
+    cfg?.runner && cfg.runner !== 'local'
+      ? [`@wdio/${Array.isArray(cfg.runner) ? cfg.runner[0] : cfg.runner}-runner`]
+      : [];
+
+  const reporters = cfg?.reporters
+    ? cfg.reporters
+        .flatMap(reporter => {
+          if (typeof reporter === 'string') return [reporter];
+          if (Array.isArray(reporter) && typeof reporter[0] === 'string') return [reporter[0]];
+          return [];
+        })
+        .map(reporter => `@wdio/${reporter}-reporter`)
+    : [];
+
+  return [...frameworks, ...runners, ...reporters];
+};
+
+export default {
+  title,
+  enablers,
+  isEnabled,
+  config,
+  resolveConfig,
+} satisfies Plugin;

packages/knip/src/plugins/webdriver-io/types.ts

@@ -0,0 +1,5 @@
+/// <reference types="@wdio/types" />
+
+export type WebdriverIOConfig = {
+  config: WebdriverIO.Config;
+};

packages/knip/test/plugins/webdriver-io.test.ts

@@ -0,0 +1,21 @@
+import { test } from 'bun:test';
+import assert from 'node:assert/strict';
+import { main } from '../../src/index.js';
+import { resolve } from '../../src/util/path.js';
+import baseArguments from '../helpers/baseArguments.js';
+import baseCounters from '../helpers/baseCounters.js';
+
+const cwd = resolve('fixtures/plugins/webdriver-io');
+
+test('Find dependencies with the webdriver-io plugin', async () => {
+  const { counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    processed: 1,
+    total: 1,
+  });
+});