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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,205 @@ | ||
| namespace tsp { | ||
| const path = require('path'); | ||
| const fs = require('fs'); | ||
|
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| const requireStack: string[] = []; | ||
|
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| /* ****************************************************** */ | ||
| // region: Types | ||
| /* ****************************************************** */ | ||
|
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| export namespace TspPlugin { | ||
| export interface CreateOptions { | ||
| resolveBaseDir: string | ||
| } | ||
|
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| export type Kind = 'SourceTransformer' | 'ProgramTransformer' | ||
| } | ||
|
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| // endregion | ||
|
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| /* ****************************************************** */ | ||
| // region: Helpers | ||
| /* ****************************************************** */ | ||
|
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| function getModulePackagePath(transformerPath: string, resolveBaseDir: string): string | undefined { | ||
| let transformerPackagePath: string | undefined; | ||
| try { | ||
| const pathQuery = path.join(transformerPath, 'package.json'); | ||
| transformerPackagePath = path.normalize(require.resolve(pathQuery, { paths: [ resolveBaseDir ] })); | ||
| } catch (e) { | ||
| return undefined; | ||
| } | ||
|
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| let currentDir = path.dirname(transformerPath); | ||
|
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| const seenPaths = new Set<string>(); | ||
| while (currentDir !== path.parse(currentDir).root) { | ||
| if (seenPaths.has(currentDir)) return undefined; | ||
| seenPaths.add(currentDir); | ||
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| // Could likely fail if the transformer is in a symlinked directory or the package's main file is in a | ||
| // directory above the package.json – however, I believe that the walking up method used here is the common | ||
| // approach, so we'll consider these acceptable edge cases for now. | ||
| if (path.relative(currentDir, transformerPackagePath).startsWith('..')) return undefined; | ||
|
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| const potentialPkgPath = path.join(currentDir, 'package.json'); | ||
| if (fs.existsSync(potentialPkgPath)) { | ||
| if (potentialPkgPath === transformerPackagePath) return transformerPackagePath; | ||
| return undefined; | ||
| } | ||
|
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| currentDir = path.resolve(currentDir, '..'); | ||
| } | ||
|
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| return undefined; | ||
| } | ||
|
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| // endregion | ||
|
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| /* ****************************************************** */ | ||
| // region: TspPlugin | ||
| /* ****************************************************** */ | ||
|
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| export class TspPlugin { | ||
| public readonly config: PluginConfig; | ||
| public readonly tsConfigPath: string | undefined; | ||
| public readonly entryFilePath: string; | ||
| public readonly importKey: string; | ||
| public readonly packageConfig: PluginPackageConfig | undefined; | ||
| public readonly kind: TspPlugin.Kind; | ||
|
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| private readonly _createOptions: TspPlugin.CreateOptions; | ||
|
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| constructor(config: PluginConfig, createOptions: TspPlugin.CreateOptions) { | ||
| this.config = { ...config }; | ||
| this.validateConfig(); | ||
|
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| this._createOptions = createOptions; | ||
| this.importKey = config.import || 'default'; | ||
| this.kind = config.transformProgram === true ? 'ProgramTransformer' : 'SourceTransformer'; | ||
|
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| const { resolveBaseDir } = createOptions; | ||
| const configTransformValue = config.transform!; | ||
|
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| /* Resolve paths */ | ||
| this.tsConfigPath = config.tsConfig && path.resolve(resolveBaseDir, config.tsConfig); | ||
| const entryFilePath = require.resolve(configTransformValue, { paths: [ resolveBaseDir ] }); | ||
| this.entryFilePath = entryFilePath; | ||
|
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| /* Get module PluginPackageConfig */ | ||
| const modulePackagePath = getModulePackagePath(entryFilePath, resolveBaseDir); | ||
| let pluginPackageConfig: PluginPackageConfig | undefined; | ||
| if (modulePackagePath) { | ||
| const modulePkgJsonContent = fs.readFileSync(modulePackagePath, 'utf8'); | ||
| const modulePkgJson = JSON.parse(modulePkgJsonContent) as { tsp?: PluginPackageConfig }; | ||
|
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| pluginPackageConfig = modulePkgJson.tsp; | ||
| if (pluginPackageConfig === null || typeof pluginPackageConfig !== 'object') pluginPackageConfig = undefined; | ||
| } | ||
|
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| this.packageConfig = pluginPackageConfig; | ||
| } | ||
|
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| private validateConfig() { | ||
| const { config } = this; | ||
|
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| const configTransformValue = config.transform; | ||
| if (!configTransformValue) throw new TsPatchError(`Invalid plugin config: missing "transform" value`); | ||
|
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| if (config.resolvePathAliases && !config.tsConfig) { | ||
| console.warn(`[ts-patch] Warning: resolvePathAliases needs a tsConfig value pointing to a tsconfig.json for transformer" ${configTransformValue}.`); | ||
| } | ||
| } | ||
|
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| createFactory() { | ||
| const { entryFilePath, config, tsConfigPath, importKey } = this; | ||
| const configTransformValue = config.transform!; | ||
|
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| /* Prevent circular require */ | ||
| if (requireStack.includes(entryFilePath)) return; | ||
| requireStack.push(entryFilePath); | ||
|
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||
| /* Check if ESM */ | ||
| let isEsm: boolean | undefined = config.isEsm; | ||
| if (isEsm == null) { | ||
| const impliedModuleFormat = tsShim.getImpliedNodeFormatForFile( | ||
| entryFilePath as tsShim.Path, | ||
| undefined, | ||
| tsShim.sys, | ||
| { moduleResolution: tsShim.ModuleResolutionKind.Node16 } | ||
| ); | ||
|
|
||
| isEsm = impliedModuleFormat === tsShim.ModuleKind.ESNext; | ||
| } | ||
|
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| const isTs = configTransformValue.match(/\.[mc]?ts$/) != null; | ||
|
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| const registerConfig: RegisterConfig = { | ||
| isTs, | ||
| isEsm, | ||
| tsConfig: tsConfigPath, | ||
| pluginConfig: config | ||
| }; | ||
|
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| registerPlugin(registerConfig); | ||
|
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| try { | ||
| /* Load plugin */ | ||
| const commonjsModule = loadEntryFile(); | ||
|
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| const factoryModule = (typeof commonjsModule === 'function') ? { default: commonjsModule } : commonjsModule; | ||
| const factory = factoryModule[importKey]; | ||
|
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| if (!factory) | ||
| throw new TsPatchError( | ||
| `tsconfig.json > plugins: "${configTransformValue}" does not have an export "${importKey}": ` + | ||
| require('util').inspect(factoryModule) | ||
| ); | ||
|
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| if (typeof factory !== 'function') { | ||
| throw new TsPatchError( | ||
| `tsconfig.json > plugins: "${configTransformValue}" export "${importKey}" is not a plugin: ` + | ||
| require('util').inspect(factory) | ||
| ); | ||
| } | ||
|
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| return { | ||
| factory, | ||
| registerConfig: registerConfig | ||
| }; | ||
| } | ||
| finally { | ||
| requireStack.pop(); | ||
| unregisterPlugin(); | ||
| } | ||
|
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| function loadEntryFile(): PluginFactory | { [key: string]: PluginFactory } { | ||
| /* Load plugin */ | ||
| let res: PluginFactory | { [key: string]: PluginFactory } | ||
| try { | ||
| res = require(entryFilePath); | ||
| } catch (e) { | ||
| if (e.code === 'ERR_REQUIRE_ESM') { | ||
| if (!registerConfig.isEsm) { | ||
| unregisterPlugin(); | ||
| registerConfig.isEsm = true; | ||
| registerPlugin(registerConfig); | ||
| return loadEntryFile(); | ||
| } else { | ||
| throw new TsPatchError( | ||
| `Cannot load ESM transformer "${configTransformValue}" from "${entryFilePath}". Please file a bug report` | ||
| ); | ||
| } | ||
| } | ||
| else throw e; | ||
| } | ||
| return res; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // endregion | ||
| } | ||
|
|
||
| // endregion |
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