Generates rough TypeScript declarations from CoffeeScript sources
Last updated 2 years ago by sjbarag .
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$ cnpm install @hulu/splitshot 
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A NodeJS module that generates rough TypeScript declarations from CoffeeScript sources


To run it from the command line:

$ npm install -g @hulu/splitshot

or to run it from JavaScript:

$ npm install --save @hulu/splitshot



The splitshot CLI command accepts the path to a .coffee file as its only argument and prints (to stdout) the TypeScript declaration for the provided .coffee file. You'll likely want to redirect stdout to a file like so:

$ splitshot path/to/SingleOrigin.coffee > path/to/SingleOrigin.d.ts

From JavaScript

const splitshot = require("@hulu/splitshot");
const fs = require("fs");

const pathToCoffee = "path/to/SingleOrigin.coffee";

fs.readFile(pathToCoffee, (err, data) => {
  if (err) { throw err };
  const declarations = splitshot.generateDeclarations(data, pathToCoffee);

  // do stuff with those declarations!

Optional adjustments to tsconfig.json

By default, TypeScript only looks for .d.ts files next to the file being required, e.g.

import foo = require("./foo");

results in a path search for ./foo.d.ts or ./foo.ts at compile-time. This makes integration with CoffeeScript sources initially very simple: just put the .d.ts files next to the corresponding .coffee file. This quickly gets very messy -- especially for large CoffeeScript projects. To keep the generated .d.ts files in a separate directory, use the rootDirs compiler option to add an additional types source:

    "compilerOptions": {
        "module": "commonjs",
        "moduleResolution": "node",
        "target": "es3",
        "outDir": "bin/typescript/",
        // check ./src and ./bin/types/src for type declarations
        "rootDirs": [
    "include": [

Just be sure to mirror the directory structure in ./src so the lookup paths match! @hulu/gulp-splitshot (coming soon) handles directory structure matching, so consider using it for projects that build with gulp.

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