index.js

var loaderUtils = require('loader-utils')
var path = require('path')
var escapeHtml = require('js-string-escape')

module.exports = function (content) {
  this.cacheable && this.cacheable()

  var query = loaderUtils.parseQuery(this.query)
  var ngModule = query.module || 'ng' // ng is the global angular module that does not need to explicitly required
  var relativeTo = query.relativeTo || ''
  var prefix = query.prefix || ''
  var globalAngular = !!query.globalAngular || false
  var absolute = false
  var pathSep = query.pathSep || '/'
  var resource = this.resource
  var pathSepRegex = new RegExp(escapeRegExp(path.sep), 'g')

  // if a unix path starts with // we treat is as an absolute path e.g. //Users/wearymonkey
  // if we're on windows, then we ignore the / prefix as windows absolute paths are unique anyway e.g. C:\Users\wearymonkey
  if (relativeTo[0] === '/') {
    if (path.sep === '\\') { // we're on windows
      relativeTo = relativeTo.substring(1)
    } else if (relativeTo[1] === '/') {
      absolute = true
      relativeTo = relativeTo.substring(1)
    }
  }

  // TODO: can we defer to node path for some of this?
  // normalise the path separators
  if (path.sep !== pathSep) {
    relativeTo = relativeTo.replace(pathSepRegex, pathSep)
    prefix = prefix.replace(pathSepRegex, pathSep)
    resource = resource.replace(pathSepRegex, pathSep)
  }

  var relativeToIndex = resource.indexOf(relativeTo)
  if (relativeToIndex === -1 || (absolute && relativeToIndex !== 0)) {
    throw new Error('The path for file doesn\'t contain relativeTo param')
  }

  var filePath = prefix + resource.slice(relativeToIndex + relativeTo.length) // get the base path
  var angular = globalAngular ? 'window.angular' : `require('angular')`

  var html;
  if (content.match(/^module\.exports/)) {
      var firstQuote = findQuote(content, false);
      var secondQuote = findQuote(content, true);
      html = content.substr(firstQuote, secondQuote - firstQuote + 1);
  } else {
      html = content;
  }

  return `
      var path = '${escapeHtml(filePath)}';
      ${angular}.module('${ngModule}').run(['$templateCache', function(c) { c.put(path, ${html}) }]);
      module.exports = path;
  `
  // source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#Using_Special_Characters
  function escapeRegExp (string) {
    return string.replace(/([.*+?^=!:${}()|[\]/\\])/g, '\\$1')
  }

    function findQuote(content, backwards) {
        var i = backwards ? content.length - 1 : 0;
        while (i >= 0 && i < content.length) {
            if (content[i] == '"' || content[i] == "'") {
                return i;
            }
            i += backwards ? -1 : 1;
        }
        return -1;
    }
}