Created
October 1, 2025 17:41
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| import ts, { CustomTransformerFactory } from 'typescript'; | |
| import { ReflectionTransformer, transformer } from '@deepkit/type-compiler'; | |
| import type { Plugin } from 'esbuild'; | |
| import { readFileSync } from 'fs'; | |
| import { join } from 'path'; | |
| let resolver: ReturnType<ReflectionTransformer['getConfigResolver']> | undefined = undefined; | |
| function getConfigResolver(configFilePath: string): ReturnType<ReflectionTransformer['getConfigResolver']> { | |
| if (resolver) return resolver; | |
| let reflectionTransformer: ReflectionTransformer | undefined = undefined; | |
| const catchTransformers = { | |
| before: [(context) => reflectionTransformer = transformer(context) as ReflectionTransformer] as CustomTransformerFactory[] | |
| }; | |
| ts.transpileModule('', { | |
| compilerOptions: Object.assign({ | |
| configFilePath, | |
| }), | |
| fileName: 'test.ts', | |
| transformers: catchTransformers | |
| }); | |
| if (!reflectionTransformer) { | |
| throw new Error('Reflection transformer not initialized'); | |
| } | |
| return resolver = (reflectionTransformer as ReflectionTransformer as any).getConfigResolver({ fileName: 'test.ts' }); | |
| } | |
| function loadCompilerOptions(configFilePath: string): ts.CompilerOptions { | |
| const configFile = ts.readConfigFile(configFilePath, ts.sys.readFile); | |
| if (configFile.error) throw new Error(ts.formatDiagnosticsWithColorAndContext([configFile.error], { | |
| getCanonicalFileName: f => f, | |
| getCurrentDirectory: ts.sys.getCurrentDirectory, | |
| getNewLine: () => ts.sys.newLine | |
| })); | |
| const parsed = ts.parseJsonConfigFileContent( | |
| configFile.config, | |
| ts.sys, | |
| './' | |
| ); | |
| return parsed.options; | |
| } | |
| export function deepkitPlugin(configFilePath: string): Plugin { | |
| return { | |
| name: 'deepkit-loader', | |
| setup(build) { | |
| const resolver = getConfigResolver(configFilePath); | |
| const compilerOptions = { | |
| ...loadCompilerOptions(configFilePath), | |
| skipDefaultLibCheck: true, | |
| skipLibCheck: true, | |
| sourceMap: true, | |
| inlineSources: true, | |
| }; | |
| const node_modules = join(process.cwd(), 'node_modules'); | |
| build.onLoad({ filter: /.*/, }, async (args) => { | |
| // we skip node_modules | |
| if (args.path.startsWith(node_modules)) return undefined; | |
| const match = resolver.match(args.path); | |
| if (match.mode === 'never') return undefined; | |
| const source = readFileSync(args.path, 'utf8'); | |
| const output = ts.transpileModule(source, { | |
| compilerOptions, | |
| fileName: args.path, | |
| transformers: { | |
| before: [transformer], | |
| } | |
| }); | |
| return { | |
| contents: output.outputText, | |
| loader: 'js', | |
| }; | |
| }); | |
| }, | |
| }; | |
| } |
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