github.com/yrj2011/jx-test-infra@v0.0.0-20190529031832-7a2065ee98eb/triage/node_modules/exit/lib/exit.js (about)

     1  /*
     2   * exit
     3   * https://github.com/cowboy/node-exit
     4   *
     5   * Copyright (c) 2013 "Cowboy" Ben Alman
     6   * Licensed under the MIT license.
     7   */
     8  
     9  'use strict';
    10  
    11  module.exports = function exit(exitCode, streams) {
    12    if (!streams) { streams = [process.stdout, process.stderr]; }
    13    var drainCount = 0;
    14    // Actually exit if all streams are drained.
    15    function tryToExit() {
    16      if (drainCount === streams.length) {
    17        process.exit(exitCode);
    18      }
    19    }
    20    streams.forEach(function(stream) {
    21      // Count drained streams now, but monitor non-drained streams.
    22      if (stream.bufferSize === 0) {
    23        drainCount++;
    24      } else {
    25        stream.write('', 'utf-8', function() {
    26          drainCount++;
    27          tryToExit();
    28        });
    29      }
    30      // Prevent further writing.
    31      stream.write = function() {};
    32    });
    33    // If all streams were already drained, exit now.
    34    tryToExit();
    35    // In Windows, when run as a Node.js child process, a script utilizing
    36    // this library might just exit with a 0 exit code, regardless. This code,
    37    // despite the fact that it looks a bit crazy, appears to fix that.
    38    process.on('exit', function() {
    39      process.exit(exitCode);
    40    });
    41  };