mist/lib/pretty-error.js

Mist build system

var betterStack, chalk, col, compileExpected, compileFileMarker, compileSourceMarker, fs, line, paragraph, path,
  slice = [].slice;

chalk = require('chalk');

fs = require('fs');

path = require('path');

col = ["\x1b[0G", "\x1b[3G", "\x1b[13G", "\x1b[35G"];

paragraph = function() {
  var lines;
  lines = 1 <= arguments.length ? slice.call(arguments, 0) : [];
  return lines.filter(function(a) {
    return a != null;
  }).join('\n');
};

line = function() {
  var args, l;
  args = 1 <= arguments.length ? slice.call(arguments, 0) : [];
  l = args.filter(function(a) {
    return a != null;
  }).join('');
  if (l && l.length) {
    return l;
  }
};

compileExpected = function(expected) {
  var e, first, l, results;
  first = true;
  results = (function() {
    var j, len, ref, results1;
    ref = expected.filter(function(i) {
      return i.type !== 'other' || (i.description != null);
    });
    results1 = [];
    for (j = 0, len = ref.length; j < len; j++) {
      e = ref[j];
      l = [first ? (first = false, col[1] + "expected" + col[2]) : col[1] + "or" + col[2], chalk.cyan.bold(e.description), col[3], e.type ? " " + (chalk.dim.grey(e.type)) : void 0, e.value ? " " + (chalk.dim.grey(e.value)) : void 0].filter(function(a) {
        return a != null;
      }).join('');
      if (l && l.length) {
        results1.push(l);
      } else {
        results1.push(void 0);
      }
    }
    return results1;
  })();
  return results.join('\n');
};

compileFileMarker = function(filename, line, column) {
  try {
    return compileSourceMarker(fs.readFileSync(filename).toString(), line, column);
  } catch (_error) {}
};

compileSourceMarker = function(src, line, column) {
  var lines, result;
  lines = src.split(/\r?\n/g);
  line = lines[line - 1];
  if (!(line && line.length)) {
    return;
  }
  result = ['\n', line];
  if (column) {
    result.push("\x1b[1D\x1b[" + column + "C" + (chalk.red.bold('^')));
  }
  return result.join("\n" + col[1]);
};

betterStack = function(stack) {
  var found, lines;
  lines = stack.split(/\r?\n/g);
  lines = lines.slice(1);
  lines = lines.map(function(line) {
    var m;
    return m = line.match(/^\s*at\s+(?:(?:([^\s(]+(?:\s+[^\s(]+)*)\s*\(([^:]+)(:\d+:\d+)?\))|(?:([^:]+)(:\d+:\d+)))$/);
  });
  found = false;
  lines = lines.filter(function(line) {
    var abs;
    if (abs = path.isAbsolute(line[2] || line[4])) {
      found = true;
    }
    return abs || !found;
  });
  lines = lines.map(function(line) {
    if (line[1]) {
      return col[1] + "in" + col[2] + line[1] + " (" + line[2] + (line[3] || '') + ")";
    } else {
      return col[1] + "in" + col[2] + line[4] + (line[5] || '');
    }
  });
  return lines.join('\n');
};

module.exports = function(e) {
  if (e.constructor === String) {
    e = {
      message: e
    };
  }
  if ((e.line != null) && (e.map != null)) {
    e.sourceLine = e.line;
    e.line = e.map[e.line - 1];
  }
  console.error(paragraph(null, line(null, chalk.red.bold('ERROR: '), e.message || 'unexpected error'), line(null, e.filename || e.line ? col[1] + "at" + col[2] : void 0, e.filename || e.line ? e.filename || '[unknown]' : void 0, e.line ? ":" + e.line : void 0, e.line && e.column ? ":" + e.column : void 0), line(null, e.expected ? compileExpected(e.expected) : void 0), line(null, e.source && e.line ? compileSourceMarker(e.source, (e.sourced ? e.sourceLine : e.line), e.column) : e.filename && e.line ? compileFileMarker(e.filename, e.line, e.column) : void 0), line(null), e.stack ? chalk.dim.grey(betterStack(e.stack)) : void 0));
  return process.exit(10);
};

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