Add react-cosmos plugin

packages/knip/fixtures/plugins/react-cosmos/cosmos.config.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "http://json.schemastore.org/cosmos-config",
+  "plugins": [
+    "react-cosmos-plugin-open-fixture",
+    "react-cosmos-plugin-boolean-input",
+    "react-cosmos-plugin-webpack",
+    "./src/my-cosmos-plugin.ts"
+  ],
+  "webpack": {
+    "configPath": "./webpack.config.cosmos.js",
+    "overridePath": "./webpack.override.js"
+  },
+  "vite": {
+    "configPath": "./tools/vite.config.js"
+  }
+}

packages/knip/fixtures/plugins/react-cosmos/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@fixtures/react-cosmos",
+  "version": "*",
+  "scripts": {
+    "cosmos": "cosmos",
+    "cosmos-export": "cosmos-export",
+    "cosmos-native": "cosmos-native"
+  },
+  "devDependencies": {
+    "react-cosmos": "*",
+    "react-cosmos-native": "*",
+    "react-cosmos-plugin-boolean-input": "*",
+    "react-cosmos-plugin-open-fixture": "*",
+    "react-cosmos-plugin-webpack": "*"
+  }
+}

packages/knip/fixtures/plugins/react-cosmos/src/cosmos.decorator.tsx

@@ -0,0 +1 @@
+export default function MyDecorator() {}

packages/knip/schema.json

@@ -436,6 +436,10 @@
           "title": "Prettier plugin configuration (https://knip.dev/reference/plugins/prettier)",
           "$ref": "#/definitions/plugin"
         },
+        "react-cosmos": {
+          "title": "react-cosmos plugin configuration (https://knip.dev/reference/plugins/react-cosmos)",
+          "$ref": "#/definitions/plugin"
+        },
         "release-it": {
           "title": "Release It plugin configuration (https://knip.dev/reference/plugins/release-it)",
           "$ref": "#/definitions/plugin"

packages/knip/src/ConfigurationValidator.ts

@@ -116,6 +116,7 @@ const pluginsSchema = z.object({
   'playwright-ct': pluginSchema,
   postcss: pluginSchema,
   prettier: pluginSchema,
+  'react-cosmos': pluginSchema,
   'release-it': pluginSchema,
   remark: pluginSchema,
   remix: pluginSchema,

packages/knip/src/plugins/index.ts

@@ -37,6 +37,7 @@ export { default as playwright } from './playwright/index.js';
 export { default as playwrightCt } from './playwright-ct/index.js';
 export { default as postcss } from './postcss/index.js';
 export { default as prettier } from './prettier/index.js';
+export { default as reactCosmos } from './react-cosmos/index.js';
 export { default as releaseIt } from './release-it/index.js';
 export { default as remark } from './remark/index.js';
 export { default as remix } from './remix/index.js';

packages/knip/src/plugins/react-cosmos/index.ts

@@ -0,0 +1,49 @@
+import type { EnablerPatterns } from '#p/types/config.js';
+import type { IsPluginEnabled, Plugin, ResolveConfig, ResolveEntryPaths } from '#p/types/plugins.js';
+import { hasDependency, resolveEntry } from '#p/util/plugin.js';
+import { join } from '../../util/path.js';
+import { toEntryPattern } from '../../util/protocols.js';
+import type { ReactCosmosConfig } from './types.js';
+
+// https://reactcosmos.org/docs
+
+const title = 'React Cosmos';
+
+const enablers: EnablerPatterns = ['react-cosmos'];
+
+const isEnabled: IsPluginEnabled = ({ dependencies }) => hasDependency(dependencies, enablers);
+
+const config = ['cosmos.config.json'];
+
+const ext = '{js,jsx,ts,tsx,md,mdx}';
+
+const fixtureEntry = [`**/*.fixture.${ext}`, `__fixtures__/**/*.${ext}`, `**/fixture.${ext}`];
+
+const decoratorEntry = ['**/cosmos.decorator.{jsx,tsx}'];
+
+const entry = [...fixtureEntry, ...decoratorEntry];
+
+const resolveEntryPaths: ResolveEntryPaths<ReactCosmosConfig> = async localConfig => {
+  const { fixturesDir, fixtureFileSuffix } = localConfig;
+  const entries = [
+    join(fixturesDir ?? '__fixtures__', `**/*.${ext}`),
+    join(fixturesDir ?? '', `**/*.${fixtureFileSuffix ?? 'fixture'}.${ext}`),
+    join(fixturesDir ?? '', `**/${fixtureFileSuffix ?? 'fixture'}.${ext}`),
+  ];
+  return [...entries, ...decoratorEntry].map(toEntryPattern);
+};
+
+const resolveConfig: ResolveConfig<ReactCosmosConfig> = async (localConfig, options) => {
+  const dependencies = (localConfig?.plugins ?? []).map(specifier => resolveEntry(options, specifier));
+  return [...dependencies];
+};
+
+export default {
+  title,
+  enablers,
+  isEnabled,
+  config,
+  entry,
+  resolveConfig,
+  resolveEntryPaths,
+} satisfies Plugin;

packages/knip/src/plugins/react-cosmos/types.ts

@@ -0,0 +1,5 @@
+export type ReactCosmosConfig = {
+  plugins?: string[];
+  fixtureFileSuffix?: string;
+  fixturesDir?: string;
+};

packages/knip/test/plugins/react-cosmos.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/react-cosmos');
+
+test('Find dependencies with the react-cosmos plugin', async () => {
+  const { counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    processed: 2,
+    total: 2,
+  });
+});