parcel-bundler/lib/Logger.js

'use strict';

const chalk = require('chalk');
const readline = require('readline');
const prettyError = require('./utils/prettyError');
const emoji = require('./utils/emoji');

var _require = require('grapheme-breaker');

const countBreaks = _require.countBreaks;

const stripAnsi = require('strip-ansi');

class Logger {
  constructor(options) {
    this.lines = 0;
    this.statusLine = null;
    this.setOptions(options);
  }

  setOptions(options) {
    this.logLevel = options && isNaN(options.logLevel) === false ? Number(options.logLevel) : 3;
    this.color = options && typeof options.color === 'boolean' ? options.color : chalk.supportsColor;
    this.chalk = new chalk.constructor({ enabled: this.color });
    this.isTest = options && typeof options.isTest === 'boolean' ? options.isTest : process.env.NODE_ENV === 'test';
  }

  countLines(message) {
    return message.split('\n').reduce((p, line) => {
      if (process.stdout.columns) {
        return p + Math.ceil((line.length || 1) / process.stdout.columns);
      }

      return p + 1;
    }, 0);
  }

  writeRaw(message) {
    this.lines += this.countLines(message) - 1;
    process.stdout.write(message);
  }

  write(message, persistent = false) {
    if (!persistent) {
      this.lines += this.countLines(message);
    }

    this._log(message);
  }

  log(message) {
    if (this.logLevel < 3) {
      return;
    }

    this.write(message);
  }

  persistent(message) {
    if (this.logLevel < 3) {
      return;
    }

    this.write(this.chalk.bold(message), true);
  }

  warn(err) {
    if (this.logLevel < 2) {
      return;
    }

    var _prettyError = prettyError(err, { color: this.color });

    let message = _prettyError.message,
        stack = _prettyError.stack;

    this.write(this.chalk.yellow(`${emoji.warning}  ${message}`));
    if (stack) {
      this.write(stack);
    }
  }

  error(err) {
    if (this.logLevel < 1) {
      return;
    }

    var _prettyError2 = prettyError(err, { color: this.color });

    let message = _prettyError2.message,
        stack = _prettyError2.stack;


    this.status(emoji.error, message, 'red');
    if (stack) {
      this.write(stack);
    }
  }

  clear() {
    if (!this.color || this.isTest) {
      return;
    }

    while (this.lines > 0) {
      readline.clearLine(process.stdout, 0);
      readline.moveCursor(process.stdout, 0, -1);
      this.lines--;
    }

    readline.cursorTo(process.stdout, 0);
    this.statusLine = null;
  }

  writeLine(line, msg) {
    if (!this.color) {
      return this.log(msg);
    }

    let n = this.lines - line;
    let stdout = process.stdout;
    readline.cursorTo(stdout, 0);
    readline.moveCursor(stdout, 0, -n);
    stdout.write(msg);
    readline.clearLine(stdout, 1);
    readline.cursorTo(stdout, 0);
    readline.moveCursor(stdout, 0, n);
  }

  status(emoji, message, color = 'gray') {
    if (this.logLevel < 3) {
      return;
    }

    let hasStatusLine = this.statusLine != null;
    if (!hasStatusLine) {
      this.statusLine = this.lines;
    }

    this.writeLine(this.statusLine, this.chalk[color].bold(`${emoji}  ${message}`));

    if (!hasStatusLine) {
      process.stdout.write('\n');
      this.lines++;
    }
  }

  handleMessage(options) {
    this[options.method](...options.args);
  }

  _log(message) {
    console.log(message);
  }

  table(columns, table) {
    // Measure column widths
    let colWidths = [];
    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;

    try {
      for (var _iterator = table[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
        let row = _step.value;

        let i = 0;
        var _iteratorNormalCompletion3 = true;
        var _didIteratorError3 = false;
        var _iteratorError3 = undefined;

        try {
          for (var _iterator3 = row[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
            let item = _step3.value;

            colWidths[i] = Math.max(colWidths[i] || 0, stringWidth(item));
            i++;
          }
        } catch (err) {
          _didIteratorError3 = true;
          _iteratorError3 = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion3 && _iterator3.return) {
              _iterator3.return();
            }
          } finally {
            if (_didIteratorError3) {
              throw _iteratorError3;
            }
          }
        }
      }

      // Render rows
    } catch (err) {
      _didIteratorError = true;
      _iteratorError = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion && _iterator.return) {
          _iterator.return();
        }
      } finally {
        if (_didIteratorError) {
          throw _iteratorError;
        }
      }
    }

    var _iteratorNormalCompletion2 = true;
    var _didIteratorError2 = false;
    var _iteratorError2 = undefined;

    try {
      for (var _iterator2 = table[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
        let row = _step2.value;

        let items = row.map((item, i) => {
          // Add padding between columns unless the alignment is the opposite to the
          // next column and pad to the column width.
          let padding = !columns[i + 1] || columns[i + 1].align === columns[i].align ? 4 : 0;
          return pad(item, colWidths[i] + padding, columns[i].align);
        });

        this.log(items.join(''));
      }
    } catch (err) {
      _didIteratorError2 = true;
      _iteratorError2 = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion2 && _iterator2.return) {
          _iterator2.return();
        }
      } finally {
        if (_didIteratorError2) {
          throw _iteratorError2;
        }
      }
    }
  }
}

// Pad a string with spaces on either side
function pad(text, length, align = 'left') {
  let pad = ' '.repeat(length - stringWidth(text));
  if (align === 'right') {
    return pad + text;
  }

  return text + pad;
}

// Count visible characters in a string
function stringWidth(string) {
  return countBreaks(stripAnsi('' + string));
}

// If we are in a worker, make a proxy class which will
// send the logger calls to the main process via IPC.
// These are handled in WorkerFarm and directed to handleMessage above.
if (process.send) {
  class LoggerProxy {}
  var _iteratorNormalCompletion4 = true;
  var _didIteratorError4 = false;
  var _iteratorError4 = undefined;

  try {
    for (var _iterator4 = Object.getOwnPropertyNames(Logger.prototype)[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
      let method = _step4.value;

      LoggerProxy.prototype[method] = (...args) => {
        process.send({
          type: 'logger',
          method,
          args
        });
      };
    }
  } catch (err) {
    _didIteratorError4 = true;
    _iteratorError4 = err;
  } finally {
    try {
      if (!_iteratorNormalCompletion4 && _iterator4.return) {
        _iterator4.return();
      }
    } finally {
      if (_didIteratorError4) {
        throw _iteratorError4;
      }
    }
  }

  module.exports = new LoggerProxy();
} else {
  module.exports = new Logger();
}