pug-lint-wb-loader/message.js

用于pug-lint的loader

// 获取带有错误文件行列的信息
module.exports = function(filename, src, line, column, message) {
  var fullMessage;
  var location = line + (column ? ':' + column : '');
  if (src && line >= 1 && line <= src.split('\n').length) {
    var lines = src.split('\n');
    var start = Math.max(line - 3, 0);
    var end = Math.min(lines.length, line + 3);
    // Error context
    var context = lines.slice(start, end).map(function(text, i){
      var curr = i + start + 1;
      var preamble = (curr == line ? '  > ' : '    ')
        + curr
        + '| ';
      var out = preamble + text;
      if (curr === line && column > 0) {
        out += '\n';
        out += Array(preamble.length + column).join('-') + '^';
      }
      return out;
    }).join('\n');
    fullMessage = (filename || 'Pug') + ':' + location + '\n' + context + '\n\n' + message;
  } else {
    fullMessage = (filename || 'Pug') + ':' + location + '\n\n' + message;
  }
  return fullMessage;
}