parcel-bundler/lib/assets/ReasonAsset.js

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'use strict';

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

const JSAsset = require('./JSAsset');
const fs = require('../utils/fs');
const localRequire = require('../utils/localRequire');

class ReasonAsset extends JSAsset {
  parse() {
    var _this = this;

    return _asyncToGenerator(function* () {
      const bsb = yield localRequire('bsb-js', _this.name);

      // This runs BuckleScript - the Reason to JS compiler.
      // Other Asset types use `localRequire` but the `bsb-js` package already
      // does that internally. This should also take care of error handling in
      // the Reason compilation process.
      if (process.env.NODE_ENV !== 'test') {
        yield bsb.runBuild();
      }

      // This is a simplified use-case for Reason - it only loads the recommended
      // BuckleScript configuration to simplify the file processing.
      const outputFile = _this.name.replace(/\.(re|ml)$/, '.bs.js');
      const outputContent = yield fs.readFile(outputFile);
      _this.contents = outputContent.toString();

      // After loading the compiled JS source, use the normal JS behavior.
      return yield super.parse(_this.contents);
    })();
  }
}

module.exports = ReasonAsset;