index.js

const log = require('fancy-log');
const webpack = require('webpack');
const PluginError = require('plugin-error');
const config = require('./webpack.config');
const releaseConfig = require('./webpack.config.release');

const handleWebpackOutput = (err, stats) => {
  if (err) throw new PluginError('tsPipeline', err);
  log(
    '[tsPipeline]',
    stats.toString({
      colors: true,
      chunks: false
    })
  );
};

const getDevCompiler = (options) => {
  return webpack(config(options));
};

const getReleaseCompiler = (options) => {
  return webpack(releaseConfig(options));
};

const registerBuildGulpTasks = (gulp, options) => {
  gulp.task('tsPipeline:build:dev', (done) => {
    const compiler = getDevCompiler(options);
    compiler.run((err, stats) => {
      handleWebpackOutput(err, stats);
      if (stats && stats.hasErrors()) {
        return done(new Error('typescript compilation failed'));
      }
      done();
    });
  });

  gulp.task('tsPipeline:build:release', (done) => {
    const compiler = getReleaseCompiler(options);
    compiler.run((err, stats) => {
      handleWebpackOutput(err, stats);
      if (stats && stats.hasErrors()) {
        return done(new Error('typescript compilation failed'));
      }
      done();
    });
  });

  gulp.task('tsPipeline:watch', () => {
    const compiler = getDevCompiler(options);
    compiler.watch(
      {
        aggregateTimeout: 300, // wait so long for more changes
        poll: 2000 // windows needs polling to pick up changes :(
      },
      (err, stats) => {
        handleWebpackOutput(err, stats);
      }
    );
  });
};

module.exports = {
  registerBuildGulpTasks: registerBuildGulpTasks,
  getDevCompiler: getDevCompiler,
  getReleaseCompiler: getReleaseCompiler
};