gatsby-plugin-gatsby-cloud/create-redirects.js

A Gatsby plugin which optimizes working with Gatsby Cloud

"use strict";

exports.__esModule = true;
exports.default = writeRedirectsFile;
var _fsExtra = require("fs-extra");
var _constants = require("./constants");
var _ipc = require("./ipc");
async function writeRedirectsFile(pluginData, redirects, rewrites) {
  const {
    publicFolder
  } = pluginData;

  // gatsby adds path-prefix to redirects so we need to remove them again
  if (redirects && pluginData.pathPrefix) {
    redirects = redirects.map(redirect => {
      if (redirect.fromPath.startsWith(pluginData.pathPrefix)) {
        redirect.fromPath = redirect.fromPath.slice(pluginData.pathPrefix.length);
      }
      if (redirect.toPath.startsWith(pluginData.pathPrefix)) {
        redirect.toPath = redirect.toPath.slice(pluginData.pathPrefix.length);
      }
      return redirect;
    });
  }

  /**
   * IPC Emit for redirects
   */
  let lastMessageSent;
  redirects.forEach(redirect => {
    lastMessageSent = (0, _ipc.emitRedirects)(redirect);
  });

  /**
   * IPC Emit for rewrites
   */
  rewrites.forEach(rewrite => {
    lastMessageSent = (0, _ipc.emitRewrites)(rewrite);
  });

  // This prevents process from exiting before handling the last IPC message
  await lastMessageSent;

  // Is it ok to pass through the data or should we format it so that we don't have dependencies
  // between the redirects and rewrites formats? What are the chances those will change?
  const FILE_PATH = publicFolder(_constants.REDIRECTS_FILENAME);
  return (0, _fsExtra.writeFile)(FILE_PATH, JSON.stringify({
    redirects,
    rewrites
  }));
}