Acme.BookStore.HttpApi.Host/node_modules/vinyl-sourcemap/lib/helpers.js

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'use strict';

var path = require('path');

var fs = require('graceful-fs');
var nal = require('now-and-later');
var File = require('vinyl');
var convert = require('convert-source-map');
var removeBOM = require('remove-bom-buffer');
var appendBuffer = require('append-buffer');
var normalizePath = require('normalize-path');

var urlRegex = /^(https?|webpack(-[^:]+)?):\/\//;

function isRemoteSource(source) {
  return source.match(urlRegex);
}

function parse(data) {
  try {
    return JSON.parse(removeBOM(data));
  } catch (err) {
    // TODO: should this log a debug?
  }
}

function loadSourceMap(file, state, callback) {
  // Try to read inline source map
  state.map = convert.fromSource(state.content);

  if (state.map) {
    state.map = state.map.toObject();
    // Sources in map are relative to the source file
    state.path = file.dirname;
    state.content = convert.removeComments(state.content);
    // Remove source map comment from source
    file.contents = new Buffer(state.content, 'utf8');
    return callback();
  }

  // Look for source map comment referencing a source map file
  var mapComment = convert.mapFileCommentRegex.exec(state.content);

  var mapFile;
  if (mapComment) {
    mapFile = path.resolve(file.dirname, mapComment[1] || mapComment[2]);
    state.content = convert.removeMapFileComments(state.content);
    // Remove source map comment from source
    file.contents = new Buffer(state.content, 'utf8');
  } else {
    // If no comment try map file with same name as source file
    mapFile = file.path + '.map';
  }

  // Sources in external map are relative to map file
  state.path = path.dirname(mapFile);

  fs.readFile(mapFile, onRead);

  function onRead(err, data) {