如何将变压器传递给 ts-node？

Question

由于我需要使用转换器，因此我正在尝试为 Typescript 推出自己的编译器。

我们使用 ts-node 来运行一些文件（单独的测试等），我还需要将转换器传递给 ts-node 编译器。

这是我的代码

const ts = require('typescript');
const tsNode = require('ts-node').register;
const keysTransformer = require( 'ts-transformer-keys/transformer');
const tsConfig = require( './tsconfig.json');

const compileProject = () => {
    const { options, fileNames } = ts.parseJsonConfigFileContent(
        tsConfig,
        ts.sys,
        __dirname
    );
    const program = ts.createProgram(fileNames, options);

    const transformers = {
        before: [keysTransformer(program)],
        after: []
    };

    program.emit(undefined, undefined, undefined, false, transformers);
}

const compileAndRun = (files) => {
    tsNode({ files, compilerOptions: tsConfig.compilerOptions, transformers: ["ts-transformer-keys/transformer"] });
    files.forEach(file => {
        require(file);
    });
}

module.export = main = (args) => {
    if(args.length >= 2) {
        const fileNames = args.splice(2);
        compileAndRun(fileNames);
    } else {
        compileProject();
    }
}

main(process.argv);

将转换器传递给 TypeScript 编译器（编译整个项目时）可以正常工作

const transformers = {
    before: [keysTransformer(program)],
    after: []
};

但是，我找不到足够的文档来说明如何使用 ts-node 执行相同的操作。

Answer 1

register() 的 transformers 选项属于 CustomTransformers 类型（不是您传递的数组）：

    interface CustomTransformers {
        /** Custom transformers to evaluate before built-in .js transformations. */
        before?: (TransformerFactory<SourceFile> | CustomTransformerFactory)[];
        /** Custom transformers to evaluate after built-in .js transformations. */
        after?: (TransformerFactory<SourceFile> | CustomTransformerFactory)[];
        /** Custom transformers to evaluate after built-in .d.ts transformations. */
        afterDeclarations?: (TransformerFactory<Bundle | SourceFile> | CustomTransformerFactory)[];
    }

如何将变压器传递给 ts-node？

How to pass in transformers to ts-node?

typescript

plugins

ts-node