Add ladle plugin

packages/knip/fixtures/plugins/ladle/.ladle/components.tsx

@@ -0,0 +1,5 @@
+import { type GlobalProvider } from "@ladle/react";
+import React from "react";
+
+// For details see https://ladle.dev/docs/providers
+export const Provider: GlobalProvider = ({ children }) => <div>{children}</div>;

packages/knip/fixtures/plugins/ladle/.ladle/config.mjs

@@ -0,0 +1,6 @@
+// For details see https://ladle.dev/docs/config
+/** @type {import('@ladle/react').UserConfig} */
+export default {
+  stories: "app/**/*.stories.{tsx,mdx}",
+  viteConfig: "./.ladle/vite.config.ts",
+};

packages/knip/fixtures/plugins/ladle/.ladle/vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  server: {
+    open: false,
+  },
+});

packages/knip/fixtures/plugins/ladle/app/basic.stories.tsx

@@ -0,0 +1,39 @@
+export const Hello = () => <h2>Simple Story</h2>;
+
+export const Responsive = () => {
+  return (
+    <>
+      <div
+        style={{
+          width: '100',
+          background: '#000',
+          color: '#FFF',
+          padding: '32px 32px',
+          border: '1px solid black',
+          fontFamily: 'arial',
+          fontSize: 28,
+        }}
+      >
+        Header
+      </div>
+      <button
+        style={{
+          padding: '16px 102px',
+          fontFamily: 'arial',
+          fontSize: 22,
+          margin: 32,
+          borderRadius: 8,
+          color: '#174291',
+          border: '2px solid #174291',
+          background: '#FFF',
+        }}
+      >
+        Ladle v4
+      </button>
+    </>
+  );
+};
+Responsive.meta = {
+  width: 'xsmall',
+};
+

packages/knip/fixtures/plugins/ladle/app/control.stories.tsx

@@ -0,0 +1,37 @@
+import type { Story } from "@ladle/react";
+
+export const Controls: Story<{
+  label: string;
+  disabled: boolean;
+  count: number;
+  colors: string[];
+  variant: string;
+  size: string;
+}> = ({ count, disabled, label, colors, variant, size }) => (
+  <>
+    <p>Count: {count}</p>
+    <p>Disabled: {disabled ? "yes" : "no"}</p>
+    <p>Label: {label}</p>
+    <p>Colors: {colors.join(",")}</p>
+    <p>Variant: {variant}</p>
+    <p>Size: {size}</p>
+  </>
+);
+
+Controls.args = {
+  label: "Hello world",
+  disabled: false,
+  count: 2,
+  colors: ["Red", "Blue"],
+};
+Controls.argTypes = {
+  variant: {
+    options: ["primary", "secondary"],
+    control: { type: "radio" },
+    defaultValue: "primary",
+  },
+  size: {
+    options: ["small", "medium", "big", "huuuuge"],
+    control: { type: "select" },
+  },
+};

packages/knip/fixtures/plugins/ladle/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "@fixtures/ladle",
+  "type": "module",
+  "scripts": {
+    "dev": "ladle serve --port 4123",
+    "build": "ladle build"
+  },
+  "dependencies": {
+    "@ladle/react": "*",
+    "react": "*",
+    "react-dom": "*"
+  },
+  "devDependencies": {
+    "@types/node": "*",
+    "@types/react": "*",
+    "@types/react-dom": "*",
+    "typescript": "*"
+  }
+}

packages/knip/fixtures/plugins/ladle/tsconfig.json

@@ -0,0 +1,20 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "useDefineForClassFields": true,
+    "lib": ["DOM", "DOM.Iterable", "ESNext"],
+    "allowJs": false,
+    "skipLibCheck": false,
+    "esModuleInterop": false,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx"
+  },
+  "include": ["src"]
+}

packages/knip/schema.json

@@ -356,6 +356,10 @@
           "title": "Jest plugin configuration (https://knip.dev/reference/plugins/jest)",
           "$ref": "#/definitions/plugin"
         },
+        "ladle": {
+          "title": "ladle plugin configuration (https://knip.dev/reference/plugins/ladle)",
+          "$ref": "#/definitions/plugin"
+        },
         "lefthook": {
           "title": "lefthook plugin configuration (https://knip.dev/reference/plugins/lefthook)",
           "$ref": "#/definitions/plugin"

packages/knip/src/ConfigurationValidator.ts

@@ -96,6 +96,7 @@ const pluginsSchema = z.object({
   'graphql-codegen': pluginSchema,
   husky: pluginSchema,
   jest: pluginSchema,
+  ladle: pluginSchema,
   lefthook: pluginSchema,
   'lint-staged': pluginSchema,
   linthtml: pluginSchema,

packages/knip/src/plugins/index.ts

@@ -17,6 +17,7 @@ export { default as githubActions } from './github-actions/index.js';
 export { default as graphqlCodegen } from './graphql-codegen/index.js';
 export { default as husky } from './husky/index.js';
 export { default as jest } from './jest/index.js';
+export { default as ladle } from './ladle/index.js';
 export { default as lefthook } from './lefthook/index.js';
 export { default as linthtml } from './linthtml/index.js';
 export { default as lintStaged } from './lint-staged/index.js';

packages/knip/src/plugins/ladle/index.ts

@@ -0,0 +1,43 @@
+import type { EnablerPatterns } from '#p/types/config.js';
+import type { IsPluginEnabled, Plugin, ResolveConfig, ResolveEntryPaths } from '#p/types/plugins.js';
+import { hasDependency, load } from '#p/util/plugin.js';
+import type { LadleConfig } from './types.js';
+import { toEntryPattern } from '../../util/protocols.js';
+import { resolveConfig as resolveVitestConfig } from '../vitest/index.js';
+
+// https://ladle.dev/docs/config
+
+const title = 'ladle';
+
+const enablers: EnablerPatterns = [/^@ladle\//];
+
+const isEnabled: IsPluginEnabled = ({ dependencies }) => hasDependency(dependencies, enablers);
+
+const config = ['.ladle/config.{mjs,js,ts}'];
+
+const stories: string[] = ['src/**/*.stories.{js,jsx,ts,tsx,mdx}'];
+const restEntry: string[] = ['.ladle/components.{js,jsx,ts,tsx}'];
+const entry: string[] = [...restEntry, ...stories];
+
+const project = ['.ladle/**/*.{js,jsx,ts,tsx}'];
+
+const resolveEntryPaths: ResolveEntryPaths<LadleConfig> = async localConfig => {
+  const localStories = typeof localConfig.stories === 'string' ? [localConfig.stories] : localConfig.stories;
+  const patterns = [...restEntry, ...(localStories ?? stories)];
+
+  return patterns.map(toEntryPattern);
+};
+
+const resolveConfig: ResolveConfig<LadleConfig> = async (localConfig, options) =>
+  localConfig.viteConfig ? resolveVitestConfig(await load(localConfig.viteConfig), options) : [];
+
+export default {
+  title,
+  enablers,
+  isEnabled,
+  config,
+  entry,
+  project,
+  resolveEntryPaths,
+  resolveConfig,
+} satisfies Plugin;

packages/knip/src/plugins/ladle/types.ts

@@ -0,0 +1,4 @@
+export type LadleConfig = {
+  stories?: string | string[];
+  viteConfig?: string;
+};

packages/knip/test/plugins/ladle.test.ts

@@ -0,0 +1,31 @@
+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/ladle');
+
+test('Find dependencies with the ladle plugin', async () => {
+  const { issues, counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert(issues.dependencies['package.json']['@ladle/react']);
+  assert(issues.dependencies['package.json']['react']);
+  assert(issues.dependencies['package.json']['react-dom']);
+  assert(issues.devDependencies['package.json']['@types/react']);
+  assert(issues.devDependencies['package.json']['@types/react-dom']);
+  assert(issues.binaries['package.json']['ladle']);
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    binaries: 1,
+    dependencies: 3,
+    devDependencies: 2,
+    processed: 0,
+    total: 0,
+  });
+});