pobpack-node/hot.js

Build and run node projects with webpack.

/*
 * copied from https://github.com/webpack/webpack/blob/master/hot/signal.js
 * and tweeked to always accept updates
 */
/*
 MIT License http://www.opensource.org/licenses/mit-license.php
 Author Tobias Koppers @sokra
 */
/*globals __resourceQuery */
if (!module.hot) {
  throw new Error('[HMR] Hot Module Replacement is disabled.');
}
if (!process.send) {
  throw new Error('[HMR] You need to spawn the process.');
}
var checkForUpdate = function checkForUpdate(fromUpdate) {
  module.hot
    .check()
    .then(function (updatedModules) {
      if (!updatedModules) {
        if (fromUpdate) console.log('[HMR] Update applied.');
        else console.warn('[HMR] Nothing to update.');
        return;
      }

      return module.hot
        .apply({
          ignoreUnaccepted: true,
          onUnaccepted: function (data) {
            console.warn(
              'Ignored an update to unaccepted module ' +
                data.chain.join(' -> '),
            );
          },
        })
        .then(function (renewedModules) {
          const unacceptedModules = updatedModules.filter(
            (moduleId) => renewedModules && !renewedModules.includes(moduleId),
          );
          require('webpack/hot/log-apply-result')(
            updatedModules,
            renewedModules,
          );
          if (unacceptedModules.length) {
            process.send('restart');
            return;
          }

          checkForUpdate(true);
        });
    })
    .catch(function (err) {
      var status = module.hot.status();
      if (['abort', 'fail'].indexOf(status) >= 0) {
        console.warn('[HMR] Cannot apply update.');
        console.warn('[HMR] ' + err.stack || err.message);
      } else {
        console.warn('[HMR] Update failed: ' + err.stack || err.message);
      }
      process.send('restart');
    });
};

process.on(__resourceQuery.substr(1) || 'SIGUSR2', function () {
  if (module.hot.status() !== 'idle') {
    console.warn(
      '[HMR] Got signal but currently in ' + module.hot.status() + ' state.',
    );
    console.warn('[HMR] Need to be in idle state to start hot update.');
    return;
  }

  checkForUpdate();
});