All files / lib/internal/util debuglog.js

100% Statements 117/117
93.75% Branches 30/32
92.86% Functions 13/14
100% Lines 117/117

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 11821x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 5358x 5358x 5358x 45x 45x 45x 45x 45x 45x 5358x 5313x 5313x 5358x 21x 21x 21x 33x 33x 3x 3x 3x 3x 3x 33x 21x 21x 21x 20234x 20234x 13440x 33x 33x 33x 140x 140x 140x 140x 33x 13412x 13407x 13407x 13440x 20234x 20234x 21x 21x 21x 21x 21x 54571x 54571x 20272x 20272x 20272x 54571x 20234x 20234x 20234x 20234x 20234x 20234x 20234x 20234x 20234x 20234x 20234x 20234x 54571x 54571x 54571x 38x 38x 38x 54571x 54571x 26928x 26928x 26928x 26928x 26928x 26928x 54571x 54571x 54571x 38x 54571x 54571x 54571x 54571x 54571x 54571x 21x 21x 21x 21x 21x  
'use strict';
 
const {
  ObjectCreate,
  ObjectDefineProperty,
  RegExp,
  RegExpPrototypeExec,
  SafeArrayIterator,
  StringPrototypeToLowerCase,
  StringPrototypeToUpperCase,
} = primordials;
 
const { inspect, format, formatWithOptions } = require('internal/util/inspect');
 
// `debugImpls` and `testEnabled` are deliberately not initialized so any call
// to `debuglog()` before `initializeDebugEnv()` is called will throw.
let debugImpls;
let testEnabled;
 
 
// `debugEnv` is initial value of process.env.NODE_DEBUG
function initializeDebugEnv(debugEnv) {
  debugImpls = ObjectCreate(null);
  if (debugEnv) {
    // This is run before any user code, it's OK not to use primordials.
    debugEnv = debugEnv.replace(/[|\\{}()[\]^$+?.]/g, '\\$&')
      .replaceAll('*', '.*')
      .replaceAll(',', '$|^');
    const debugEnvRegex = new RegExp(`^${debugEnv}$`, 'i');
    testEnabled = (str) => RegExpPrototypeExec(debugEnvRegex, str) !== null;
  } else {
    testEnabled = () => false;
  }
}
 
// Emits warning when user sets
// NODE_DEBUG=http or NODE_DEBUG=http2.
function emitWarningIfNeeded(set) {
  if ('HTTP' === set || 'HTTP2' === set) {
    process.emitWarning('Setting the NODE_DEBUG environment variable ' +
      'to \'' + StringPrototypeToLowerCase(set) + '\' can expose sensitive ' +
      'data (such as passwords, tokens and authentication headers) ' +
      'in the resulting log.');
  }
}
 
const noop = () => {};
 
function debuglogImpl(enabled, set) {
  if (debugImpls[set] === undefined) {
    if (enabled) {
      const pid = process.pid;
      emitWarningIfNeeded(set);
      debugImpls[set] = function debug(...args) {
        const colors = process.stderr.hasColors && process.stderr.hasColors();
        const msg = formatWithOptions({ colors }, ...args);
        const coloredPID = inspect(pid, { colors });
        process.stderr.write(format('%s %s: %s\n', set, coloredPID, msg));
      };
    } else {
      debugImpls[set] = noop;
    }
  }
  return debugImpls[set];
}
 
// debuglogImpl depends on process.pid and process.env.NODE_DEBUG,
// so it needs to be called lazily in top scopes of internal modules
// that may be loaded before these run time states are allowed to
// be accessed.
function debuglog(set, cb) {
  function init() {
    set = StringPrototypeToUpperCase(set);
    enabled = testEnabled(set);
  }
  let debug = (...args) => {
    init();
    // Only invokes debuglogImpl() when the debug function is
    // called for the first time.
    debug = debuglogImpl(enabled, set);
    if (typeof cb === 'function')
      cb(debug);
    switch (args.length) {
      case 0: return debug();
      case 1: return debug(args[0]);
      case 2: return debug(args[0], args[1]);
      default: return debug(...new SafeArrayIterator(args));
    }
  };
  let enabled;
  let test = () => {
    init();
    test = () => enabled;
    return enabled;
  };
  const logger = (...args) => {
    switch (args.length) {
      case 0: return debug();
      case 1: return debug(args[0]);
      case 2: return debug(args[0], args[1]);
      default: return debug(...new SafeArrayIterator(args));
    }
  };
  ObjectDefineProperty(logger, 'enabled', {
    get() {
      return test();
    },
    configurable: true,
    enumerable: true
  });
  return logger;
}
 
module.exports = {
  debuglog,
  initializeDebugEnv
};