github.com/jfrog/jfrog-cli-go@v1.22.1-0.20200318093948-4826ef344ffd/npm/node_modules/debug/src/node.js (about)

     1  /**
     2   * Module dependencies.
     3   */
     4  
     5  var tty = require('tty');
     6  var util = require('util');
     7  
     8  /**
     9   * This is the Node.js implementation of `debug()`.
    10   *
    11   * Expose `debug()` as the module.
    12   */
    13  
    14  exports = module.exports = require('./debug');
    15  exports.init = init;
    16  exports.log = log;
    17  exports.formatArgs = formatArgs;
    18  exports.save = save;
    19  exports.load = load;
    20  exports.useColors = useColors;
    21  
    22  /**
    23   * Colors.
    24   */
    25  
    26  exports.colors = [ 6, 2, 3, 4, 5, 1 ];
    27  
    28  try {
    29    var supportsColor = require('supports-color');
    30    if (supportsColor && supportsColor.level >= 2) {
    31      exports.colors = [
    32        20, 21, 26, 27, 32, 33, 38, 39, 40, 41, 42, 43, 44, 45, 56, 57, 62, 63, 68,
    33        69, 74, 75, 76, 77, 78, 79, 80, 81, 92, 93, 98, 99, 112, 113, 128, 129, 134,
    34        135, 148, 149, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171,
    35        172, 173, 178, 179, 184, 185, 196, 197, 198, 199, 200, 201, 202, 203, 204,
    36        205, 206, 207, 208, 209, 214, 215, 220, 221
    37      ];
    38    }
    39  } catch (err) {
    40    // swallow - we only care if `supports-color` is available; it doesn't have to be.
    41  }
    42  
    43  /**
    44   * Build up the default `inspectOpts` object from the environment variables.
    45   *
    46   *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
    47   */
    48  
    49  exports.inspectOpts = Object.keys(process.env).filter(function (key) {
    50    return /^debug_/i.test(key);
    51  }).reduce(function (obj, key) {
    52    // camel-case
    53    var prop = key
    54      .substring(6)
    55      .toLowerCase()
    56      .replace(/_([a-z])/g, function (_, k) { return k.toUpperCase() });
    57  
    58    // coerce string value into JS value
    59    var val = process.env[key];
    60    if (/^(yes|on|true|enabled)$/i.test(val)) val = true;
    61    else if (/^(no|off|false|disabled)$/i.test(val)) val = false;
    62    else if (val === 'null') val = null;
    63    else val = Number(val);
    64  
    65    obj[prop] = val;
    66    return obj;
    67  }, {});
    68  
    69  /**
    70   * Is stdout a TTY? Colored output is enabled when `true`.
    71   */
    72  
    73  function useColors() {
    74    return 'colors' in exports.inspectOpts
    75      ? Boolean(exports.inspectOpts.colors)
    76      : tty.isatty(process.stderr.fd);
    77  }
    78  
    79  /**
    80   * Map %o to `util.inspect()`, all on a single line.
    81   */
    82  
    83  exports.formatters.o = function(v) {
    84    this.inspectOpts.colors = this.useColors;
    85    return util.inspect(v, this.inspectOpts)
    86      .split('\n').map(function(str) {
    87        return str.trim()
    88      }).join(' ');
    89  };
    90  
    91  /**
    92   * Map %o to `util.inspect()`, allowing multiple lines if needed.
    93   */
    94  
    95  exports.formatters.O = function(v) {
    96    this.inspectOpts.colors = this.useColors;
    97    return util.inspect(v, this.inspectOpts);
    98  };
    99  
   100  /**
   101   * Adds ANSI color escape codes if enabled.
   102   *
   103   * @api public
   104   */
   105  
   106  function formatArgs(args) {
   107    var name = this.namespace;
   108    var useColors = this.useColors;
   109  
   110    if (useColors) {
   111      var c = this.color;
   112      var colorCode = '\u001b[3' + (c < 8 ? c : '8;5;' + c);
   113      var prefix = '  ' + colorCode + ';1m' + name + ' ' + '\u001b[0m';
   114  
   115      args[0] = prefix + args[0].split('\n').join('\n' + prefix);
   116      args.push(colorCode + 'm+' + exports.humanize(this.diff) + '\u001b[0m');
   117    } else {
   118      args[0] = getDate() + name + ' ' + args[0];
   119    }
   120  }
   121  
   122  function getDate() {
   123    if (exports.inspectOpts.hideDate) {
   124      return '';
   125    } else {
   126      return new Date().toISOString() + ' ';
   127    }
   128  }
   129  
   130  /**
   131   * Invokes `util.format()` with the specified arguments and writes to stderr.
   132   */
   133  
   134  function log() {
   135    return process.stderr.write(util.format.apply(util, arguments) + '\n');
   136  }
   137  
   138  /**
   139   * Save `namespaces`.
   140   *
   141   * @param {String} namespaces
   142   * @api private
   143   */
   144  
   145  function save(namespaces) {
   146    if (null == namespaces) {
   147      // If you set a process.env field to null or undefined, it gets cast to the
   148      // string 'null' or 'undefined'. Just delete instead.
   149      delete process.env.DEBUG;
   150    } else {
   151      process.env.DEBUG = namespaces;
   152    }
   153  }
   154  
   155  /**
   156   * Load `namespaces`.
   157   *
   158   * @return {String} returns the previously persisted debug modes
   159   * @api private
   160   */
   161  
   162  function load() {
   163    return process.env.DEBUG;
   164  }
   165  
   166  /**
   167   * Init logic for `debug` instances.
   168   *
   169   * Create a new `inspectOpts` object in case `useColors` is set
   170   * differently for a particular `debug` instance.
   171   */
   172  
   173  function init (debug) {
   174    debug.inspectOpts = {};
   175  
   176    var keys = Object.keys(exports.inspectOpts);
   177    for (var i = 0; i < keys.length; i++) {
   178      debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
   179    }
   180  }
   181  
   182  /**
   183   * Enable namespaces listed in `process.env.DEBUG` initially.
   184   */
   185  
   186  exports.enable(load());