Add graphql-codegen support (#305)

* Add graphql-codegen support

* Add `PACKAGE_JSON_PATH` to graphql-codegen

* cleenup tests

* cleenup logs

---------

Co-authored-by: Lars Kappert <lars@webpro.nl>

Author: beaussan

README.md

@@ -277,6 +277,7 @@ Knip contains a growing list of plugins:
 - [ESLint][plugin-eslint]
 - [Gatsby][plugin-gatsby]
 - [GitHub Actions][plugin-github-actions]
+- [Graphql Codegen][plugin-graphql-codegen]
 - [husky][plugin-husky]
 - [Jest][plugin-jest]
 - [Lefthook][plugin-lefthook]
@@ -928,6 +929,7 @@ Special thanks to the wonderful people who have contributed to this project:
 [plugin-eslint]: ./src/plugins/eslint
 [plugin-gatsby]: ./src/plugins/gatsby
 [plugin-github-actions]: ./src/plugins/github-actions
+[plugin-graphql-codegen]: ./src/plugins/graphql-codegen
 [plugin-husky]: ./src/plugins/husky
 [plugin-jest]: ./src/plugins/jest
 [plugin-lefthook]: ./src/plugins/lefthook

fixtures/plugins/graphql-codegen/codegen.ts

@@ -0,0 +1,21 @@
+module.exports = {
+  schema: 'schema.graphql',
+  overwrite: true,
+  generates: {
+    './graphql.schema.json': {
+      plugins: ['introspection'],
+    },
+    './graphql.schema.graphql': {
+      'schema-ast': {},
+    },
+    './src/generated/graphql.ts': {
+      documents: ['./src/**/*.tsx'],
+      plugins: ['typescript', 'typescript-operations', 'typescript-urql'],
+    },
+    './lib/': {
+      documents: ['./lib/**/*.tsx'],
+      preset: 'near-operation-file-preset',
+      plugins: ['typescript-operations', 'typescript-msw'],
+    },
+  },
+};

fixtures/plugins/graphql-codegen/node_modules/@graphql-codegen/cli/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@fixtures/_template",
+  "version": "*",
+  "devDependencies": {
+    "@graphql-codegen/cli": "*"
+  },
+  "codegen": {
+    "schema": "schema.graphql",
+    "documents": ["src/**/*.tsx", "!src/gql/**/*"],
+    "generates": {
+      "./src/gql/": {
+        "preset": "client"
+      }
+    }
+  }
+}

fixtures/plugins/graphql-codegen/package.json

@@ -276,6 +276,10 @@
           "title": "github-actions plugin configuration (https://github.com/webpro/knip/blob/main/src/plugins/github-actions/README.md)",
           "$ref": "#/definitions/plugin"
         },
+        "graphql-codegen": {
+          "title": "graphql-codegen plugin configuration (https://github.com/webpro/knip/blob/main/src/plugins/graphql-codegen/README.md)",
+          "$ref": "#/definitions/plugin"
+        },
         "husky": {
           "title": "husky plugin configuration (https://github.com/webpro/knip/blob/main/src/plugins/husky/README.md)",
           "$ref": "#/definitions/plugin"

schema.json

@@ -73,6 +73,7 @@ export const pluginSchema = z.union([
 ]);
 
 const pluginsSchema = z.object({
+  'graphql-codegen': pluginSchema,
   astro: pluginSchema,
   angular: pluginSchema,
   ava: pluginSchema,

src/ConfigurationValidator.ts

@@ -0,0 +1,22 @@
+# Graphql Codegen
+
+## Enabled
+
+This plugin is enabled when any of the following package names and/or regular expressions has a match in `dependencies`
+or `devDependencies`:
+
+- `/^@graphql-codegen\//`
+
+## Default configuration
+
+```json
+{
+  "graphql-codegen": {
+    "config": ["codegen.{ts,js,json,yml,mjs,cts}", "package.json"]
+  }
+}
+```
+
+Also see [Knip plugins][1] for more information about plugins.
+
+[1]: https://github.com/webpro/knip/blob/main/README.md#plugins

src/plugins/graphql-codegen/README.md

@@ -0,0 +1,54 @@
+import { timerify } from '../../util/Performance.js';
+import { hasDependency, load } from '../../util/plugin.js';
+import { isConfigurationOutput } from './types.js';
+import type { ConfiguredPlugin, GraphqlCodegenTypes, PresetNames } from './types.js';
+import type { IsPluginEnabledCallback, GenericPluginCallback } from '../../types/plugins.js';
+
+export const NAME = 'Graphql Codegen';
+
+/** @public */
+export const ENABLERS = [/^@graphql-codegen\//];
+
+export const PACKAGE_JSON_PATH = 'codegen';
+
+export const isEnabled: IsPluginEnabledCallback = ({ dependencies }) => hasDependency(dependencies, ENABLERS);
+
+export const CONFIG_FILE_PATTERNS = ['codegen.{ts,js,json,yml,mjs,cts}', 'package.json'];
+
+const findPluginDependencies: GenericPluginCallback = async (configFilePath, options) => {
+  const { manifest, isProduction } = options;
+
+  if (isProduction) return [];
+
+  // load configuration file from `configFilePath` (or grab `manifest` for package.json)
+  // load(FAKE_PATH) will return `undefined`
+  const localConfig: GraphqlCodegenTypes | undefined = configFilePath.endsWith('package.json')
+    ? manifest[PACKAGE_JSON_PATH]
+    : await load(configFilePath);
+
+  if (!localConfig) return [];
+
+  const generateSet = Object.values(localConfig.generates);
+
+  const configurationOutput = generateSet.filter(isConfigurationOutput);
+
+  const presets = configurationOutput
+    .map(configOutput => (configOutput.preset ? configOutput.preset : undefined))
+    .filter((preset): preset is PresetNames => typeof preset === 'string')
+    .map(presetName => `@graphql-codegen/${presetName}${presetName.endsWith('-preset') ? '' : '-preset'}`);
+
+  const flatPlugins = generateSet
+    .filter((config): config is ConfiguredPlugin => !isConfigurationOutput(config))
+    .map(item => Object.keys(item))
+    .flat()
+    .map(plugin => `@graphql-codegen/${plugin}`);
+
+  const nestedPlugins = configurationOutput
+    .map(configOutput => (configOutput.plugins ? configOutput.plugins : []))
+    .flat()
+    .map(plugin => `@graphql-codegen/${plugin}`);
+
+  return [...presets, ...flatPlugins, ...nestedPlugins];
+};
+
+export const findDependencies = timerify(findPluginDependencies);

src/plugins/graphql-codegen/index.ts

@@ -0,0 +1,53 @@
+type PluginConfig<T = unknown> = { [key: string]: T };
+export interface ConfiguredPlugin {
+  [name: string]: PluginConfig;
+}
+type NamedPlugin = string;
+
+type OutputConfig = NamedPlugin | ConfiguredPlugin;
+type PresetNamesBase = 'client' | 'near-operation-file' | 'gql-tag-operations' | 'graphql-modules' | 'import-types';
+export type PresetNames = `${PresetNamesBase}-preset` | PresetNamesBase;
+
+type OutputPreset = {
+  buildGeneratesSection: (options: unknown) => Promise<unknown>;
+  prepareDocuments?: (outputFilePath: string, outputSpecificDocuments: unknown) => Promise<unknown>;
+};
+
+export function isConfigurationOutput(config: ConfiguredOutput | ConfiguredPlugin[]): config is ConfiguredOutput {
+  return 'preset' in config || 'plugins' in config;
+}
+
+interface ConfiguredOutput {
+  /**
+   * @type array
+   * @items { "$ref": "#/definitions/GeneratedPluginsMap" }
+   * @description List of plugins to apply to this current output file.
+   *
+   * You can either specify plugins from the community using the NPM package name (after you installed it in your project), or you can use a path to a local file for custom plugins.
+   *
+   * You can find a list of available plugins here: https://the-guild.dev/graphql/codegen/docs/plugins/index
+   * Need a custom plugin? read this: https://the-guild.dev/graphql/codegen/docs/custom-codegen/index
+   */
+  plugins?: OutputConfig[];
+  /**
+   * @description If your setup uses Preset to have a more dynamic setup and output, set the name of your preset here.
+   *
+   * Presets are a way to have more than one file output, for example: https://the-guild.dev/graphql/codegen/docs/presets/near-operation-file
+   *
+   * You can either specify a preset from the community using the NPM package name (after you installed it in your project), or you can use a path to a local file for a custom preset.
+   *
+   * List of available presets: https://graphql-code-generator.com/docs/presets/presets-index
+   */
+  preset?: PresetNames | OutputPreset;
+}
+// Extracted from https://github.com/dotansimha/graphql-code-generator/blob/master/packages/utils/plugins-helpers/src/types.ts
+export interface GraphqlCodegenTypes {
+  /**
+   * @description A map where the key represents an output path for the generated code and the value represents a set of options which are relevant for that specific file.
+   *
+   * For more details: https://graphql-code-generator.com/docs/config-reference/codegen-config
+   */
+  generates: {
+    [outputPath: string]: ConfiguredOutput | ConfiguredPlugin[];
+  };
+}

src/plugins/graphql-codegen/types.ts

@@ -43,3 +43,4 @@ export * as typescript from './typescript/index.js';
 export * as vite from './vite/index.js';
 export * as vitest from './vitest/index.js';
 export * as webpack from './webpack/index.js';
+export * as graphqlCodegen from './graphql-codegen/index.js';

src/plugins/index.ts

@@ -0,0 +1,56 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { main } from '../../src/index.js';
+import * as graphqlCodegen from '../../src/plugins/graphql-codegen/index.js';
+import { resolve, join } from '../../src/util/path.js';
+import baseArguments from '../helpers/baseArguments.js';
+import baseCounters from '../helpers/baseCounters.js';
+import { getManifest, pluginConfig as config } from '../helpers/index.js';
+
+const cwd = resolve('fixtures/plugins/graphql-codegen');
+const manifest = getManifest(cwd);
+
+test('Find dependencies in graphql-codegen configuration (json)', async () => {
+  const configFilePath = join(cwd, 'package.json');
+  const dependencies = await graphqlCodegen.findDependencies(configFilePath, { manifest, config });
+  assert.deepEqual(dependencies, ['@graphql-codegen/client-preset']);
+});
+
+test('Find dependencies in graphql-codegen configuration (codegen.ts)', async () => {
+  const configFilePath = join(cwd, 'codegen.ts');
+  const dependencies = await graphqlCodegen.findDependencies(configFilePath, { manifest, config });
+  assert.deepEqual(dependencies, [
+    '@graphql-codegen/near-operation-file-preset',
+    '@graphql-codegen/schema-ast',
+    '@graphql-codegen/introspection',
+    '@graphql-codegen/typescript',
+    '@graphql-codegen/typescript-operations',
+    '@graphql-codegen/typescript-urql',
+    '@graphql-codegen/typescript-operations',
+    '@graphql-codegen/typescript-msw',
+  ]);
+});
+
+test('Find dependencies in graphql-codegen configuration (codegen.ts function)', async () => {
+  const { issues, counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert(issues.unlisted['codegen.ts']['@graphql-codegen/near-operation-file-preset']);
+  assert(issues.unlisted['codegen.ts']['@graphql-codegen/schema-ast']);
+  assert(issues.unlisted['codegen.ts']['@graphql-codegen/introspection']);
+  assert(issues.unlisted['codegen.ts']['@graphql-codegen/typescript']);
+  assert(issues.unlisted['codegen.ts']['@graphql-codegen/typescript-operations']);
+  assert(issues.unlisted['codegen.ts']['@graphql-codegen/typescript-urql']);
+  assert(issues.unlisted['codegen.ts']['@graphql-codegen/typescript-msw']);
+  assert(issues.unlisted['package.json']['@graphql-codegen/client-preset']);
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    unlisted: 8,
+    devDependencies: 1,
+    processed: 1,
+    total: 1,
+  });
+});