bootstrap.js

/**
 * @fileoverview prettier.el bootstrap script
 */

// Copyright (c) 2018-present Julian Scheid

// This program is free software: you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.


function loadScript() {
  const nodeVersion = process["version"];
  if (Number(nodeVersion["split"](/[v.]/)[1]) < 6) {
    process.exit(3);
  }

  const externalRequire = require;

  const gunzipSync = externalRequire("zlib")["gunzipSync"];
  const vm = externalRequire("vm");
  const fs = externalRequire("fs");

  function readFully(fd, size) {
    const buf = Buffer["alloc"](size);
    let offset = 0;
    while (offset < size) {
      const numRead = fs["readSync"](fd, buf, offset, size - offset, null);
      if (numRead <= 0) {
        throw new Error("EOF");
      }
      offset += numRead;
    }
    return buf;
  }

  const script = new vm["Script"](
    gunzipSync(
      Buffer.from(
        readFully(0, Number(process["argv"][1])).toString("ascii"),
        "base64"
      )
    ).toString("utf-8")
  );

  return script;
}

const script = loadScript();
global.env = process.env;
script["runInThisContext"]()(script);