ejs.js

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.ejs = factory());
})(this, (function () { 'use strict';

	function getAugmentedNamespace(n) {
		if (n.__esModule) return n;
		var a = Object.defineProperty({}, '__esModule', {value: true});
		Object.keys(n).forEach(function (k) {
			var d = Object.getOwnPropertyDescriptor(n, k);
			Object.defineProperty(a, k, d.get ? d : {
				enumerable: true,
				get: function () {
					return n[k];
				}
			});
		});
		return a;
	}

	var ejs = {};

	var _polyfillNode_fs = {};

	var _polyfillNode_fs$1 = /*#__PURE__*/Object.freeze({
		__proto__: null,
		'default': _polyfillNode_fs
	});

	var require$$0 = /*@__PURE__*/getAugmentedNamespace(_polyfillNode_fs$1);

	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.

	// resolves . and .. elements in a path array with directory names there
	// must be no slashes, empty elements, or device names (c:\) in the array
	// (so also no leading and trailing slashes - it does not distinguish
	// relative and absolute paths)
	function normalizeArray(parts, allowAboveRoot) {
	  // if the path tries to go above the root, `up` ends up > 0
	  var up = 0;
	  for (var i = parts.length - 1; i >= 0; i--) {
	    var last = parts[i];
	    if (last === '.') {
	      parts.splice(i, 1);
	    } else if (last === '..') {
	      parts.splice(i, 1);
	      up++;
	    } else if (up) {
	      parts.splice(i, 1);
	      up--;
	    }
	  }

	  // if the path is allowed to go above the root, restore leading ..s
	  if (allowAboveRoot) {
	    for (; up--; up) {
	      parts.unshift('..');
	    }
	  }

	  return parts;
	}

	// Split a filename into [root, dir, basename, ext], unix version
	// 'root' is just a slash, or nothing.
	var splitPathRe =
	    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
	var splitPath = function(filename) {
	  return splitPathRe.exec(filename).slice(1);
	};

	// path.resolve([from ...], to)
	// posix version
	function resolve() {
	  var resolvedPath = '',
	      resolvedAbsolute = false;

	  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
	    var path = (i >= 0) ? arguments[i] : '/';

	    // Skip empty and invalid entries
	    if (typeof path !== 'string') {
	      throw new TypeError('Arguments to path.resolve must be strings');
	    } else if (!path) {
	      continue;
	    }

	    resolvedPath = path + '/' + resolvedPath;
	    resolvedAbsolute = path.charAt(0) === '/';
	  }

	  // At this point the path should be resolved to a full absolute path, but
	  // handle relative paths to be safe (might happen when process.cwd() fails)

	  // Normalize the path
	  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
	    return !!p;
	  }), !resolvedAbsolute).join('/');

	  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
	}
	// path.normalize(path)
	// posix version
	function normalize(path) {
	  var isPathAbsolute = isAbsolute(path),
	      trailingSlash = substr(path, -1) === '/';

	  // Normalize the path
	  path = normalizeArray(filter(path.split('/'), function(p) {
	    return !!p;
	  }), !isPathAbsolute).join('/');

	  if (!path && !isPathAbsolute) {
	    path = '.';
	  }
	  if (path && trailingSlash) {
	    path += '/';
	  }

	  return (isPathAbsolute ? '/' : '') + path;
	}
	// posix version
	function isAbsolute(path) {
	  return path.charAt(0) === '/';
	}

	// posix version
	function join() {
	  var paths = Array.prototype.slice.call(arguments, 0);
	  return normalize(filter(paths, function(p, index) {
	    if (typeof p !== 'string') {
	      throw new TypeError('Arguments to path.join must be strings');
	    }
	    return p;
	  }).join('/'));
	}


	// path.relative(from, to)
	// posix version
	function relative(from, to) {
	  from = resolve(from).substr(1);
	  to = resolve(to).substr(1);

	  function trim(arr) {
	    var start = 0;
	    for (; start < arr.length; start++) {
	      if (arr[start] !== '') break;
	    }

	    var end = arr.length - 1;
	    for (; end >= 0; end--) {
	      if (arr[end] !== '') break;
	    }

	    if (start > end) return [];
	    return arr.slice(start, end - start + 1);
	  }

	  var fromParts = trim(from.split('/'));
	  var toParts = trim(to.split('/'));

	  var length = Math.min(fromParts.length, toParts.length);
	  var samePartsLength = length;
	  for (var i = 0; i < length; i++) {
	    if (fromParts[i] !== toParts[i]) {
	      samePartsLength = i;
	      break;
	    }
	  }

	  var outputParts = [];
	  for (var i = samePartsLength; i < fromParts.length; i++) {
	    outputParts.push('..');
	  }

	  outputParts = outputParts.concat(toParts.slice(samePartsLength));

	  return outputParts.join('/');
	}

	var sep = '/';
	var delimiter = ':';

	function dirname(path) {
	  var result = splitPath(path),
	      root = result[0],
	      dir = result[1];

	  if (!root && !dir) {
	    // No dirname whatsoever
	    return '.';
	  }

	  if (dir) {
	    // It has a dirname, strip trailing slash
	    dir = dir.substr(0, dir.length - 1);
	  }

	  return root + dir;
	}

	function basename(path, ext) {
	  var f = splitPath(path)[2];
	  // TODO: make this comparison case-insensitive on windows?
	  if (ext && f.substr(-1 * ext.length) === ext) {
	    f = f.substr(0, f.length - ext.length);
	  }
	  return f;
	}


	function extname(path) {
	  return splitPath(path)[3];
	}
	var _polyfillNode_path = {
	  extname: extname,
	  basename: basename,
	  dirname: dirname,
	  sep: sep,
	  delimiter: delimiter,
	  relative: relative,
	  join: join,
	  isAbsolute: isAbsolute,
	  normalize: normalize,
	  resolve: resolve
	};
	function filter (xs, f) {
	    if (xs.filter) return xs.filter(f);
	    var res = [];
	    for (var i = 0; i < xs.length; i++) {
	        if (f(xs[i], i, xs)) res.push(xs[i]);
	    }
	    return res;
	}

	// String.prototype.substr - negative index don't work in IE8
	var substr = 'ab'.substr(-1) === 'b' ?
	    function (str, start, len) { return str.substr(start, len) } :
	    function (str, start, len) {
	        if (start < 0) start = str.length + start;
	        return str.substr(start, len);
	    }
	;

	var _polyfillNode_path$1 = /*#__PURE__*/Object.freeze({
		__proto__: null,
		resolve: resolve,
		normalize: normalize,
		isAbsolute: isAbsolute,
		join: join,
		relative: relative,
		sep: sep,
		delimiter: delimiter,
		dirname: dirname,
		basename: basename,
		extname: extname,
		'default': _polyfillNode_path
	});

	var require$$1 = /*@__PURE__*/getAugmentedNamespace(_polyfillNode_path$1);

	var utils = {};

	/*
	 * EJS Embedded JavaScript templates
	 * Copyright 2112 Matthew Eernisse (mde@fleegix.org)
	 *
	 * Licensed under the Apache License, Version 2.0 (the "License");
	 * you may not use this file except in compliance with the License.
	 * You may obtain a copy of the License at
	 *
	 *         http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 *
	*/

	(function (exports) {

	var regExpChars = /[|\\{}()[\]^$+*?.]/g;

	/**
	 * Escape characters reserved in regular expressions.
	 *
	 * If `string` is `undefined` or `null`, the empty string is returned.
	 *
	 * @param {String} string Input string
	 * @return {String} Escaped string
	 * @static
	 * @private
	 */
	exports.escapeRegExpChars = function (string) {
	  // istanbul ignore if
	  if (!string) {
	    return '';
	  }
	  return String(string).replace(regExpChars, '\\$&');
	};

	var _ENCODE_HTML_RULES = {
	  '&': '&amp;',
	  '<': '&lt;',
	  '>': '&gt;',
	  '"': '&#34;',
	  "'": '&#39;'
	};
	var _MATCH_HTML = /[&<>'"]/g;

	function encode_char(c) {
	  return _ENCODE_HTML_RULES[c] || c;
	}

	/**
	 * Stringified version of constants used by {@link module:utils.escapeXML}.
	 *
	 * It is used in the process of generating {@link ClientFunction}s.
	 *
	 * @readonly
	 * @type {String}
	 */

	var escapeFuncStr =
	  'var _ENCODE_HTML_RULES = {\n'
	+ '      "&": "&amp;"\n'
	+ '    , "<": "&lt;"\n'
	+ '    , ">": "&gt;"\n'
	+ '    , \'"\': "&#34;"\n'
	+ '    , "\'": "&#39;"\n'
	+ '    }\n'
	+ '  , _MATCH_HTML = /[&<>\'"]/g;\n'
	+ 'function encode_char(c) {\n'
	+ '  return _ENCODE_HTML_RULES[c] || c;\n'
	+ '};\n';

	/**
	 * Escape characters reserved in XML.
	 *
	 * If `markup` is `undefined` or `null`, the empty string is returned.
	 *
	 * @implements {EscapeCallback}
	 * @param {String} markup Input string
	 * @return {String} Escaped string
	 * @static
	 * @private
	 */

	exports.escapeXML = function (markup) {
	  return markup == undefined
	    ? ''
	    : String(markup)
	      .replace(_MATCH_HTML, encode_char);
	};
	exports.escapeXML.toString = function () {
	  return Function.prototype.toString.call(this) + ';\n' + escapeFuncStr;
	};

	/**
	 * Naive copy of properties from one object to another.
	 * Does not recurse into non-scalar properties
	 * Does not check to see if the property has a value before copying
	 *
	 * @param  {Object} to   Destination object
	 * @param  {Object} from Source object
	 * @return {Object}      Destination object
	 * @static
	 * @private
	 */
	exports.shallowCopy = function (to, from) {
	  from = from || {};
	  for (var p in from) {
	    to[p] = from[p];
	  }
	  return to;
	};

	/**
	 * Naive copy of a list of key names, from one object to another.
	 * Only copies property if it is actually defined
	 * Does not recurse into non-scalar properties
	 *
	 * @param  {Object} to   Destination object
	 * @param  {Object} from Source object
	 * @param  {Array} list List of properties to copy
	 * @return {Object}      Destination object
	 * @static
	 * @private
	 */
	exports.shallowCopyFromList = function (to, from, list) {
	  for (var i = 0; i < list.length; i++) {
	    var p = list[i];
	    if (typeof from[p] != 'undefined') {
	      to[p] = from[p];
	    }
	  }
	  return to;
	};

	/**
	 * Simple in-process cache implementation. Does not implement limits of any
	 * sort.
	 *
	 * @implements {Cache}
	 * @static
	 * @private
	 */
	exports.cache = {
	  _data: {},
	  set: function (key, val) {
	    this._data[key] = val;
	  },
	  get: function (key) {
	    return this._data[key];
	  },
	  remove: function (key) {
	    delete this._data[key];
	  },
	  reset: function () {
	    this._data = {};
	  }
	};

	/**
	 * Transforms hyphen case variable into camel case.
	 *
	 * @param {String} string Hyphen case string
	 * @return {String} Camel case string
	 * @static
	 * @private
	 */
	exports.hyphenToCamel = function (str) {
	  return str.replace(/-[a-z]/g, function (match) { return match[1].toUpperCase(); });
	};
	}(utils));

	var name = "ejs";
	var description = "Embedded JavaScript templates";
	var keywords = [
		"template",
		"engine",
		"ejs"
	];
	var version = "3.1.6";
	var author = "Matthew Eernisse <mde@fleegix.org> (http://fleegix.org)";
	var license = "Apache-2.0";
	var bin = {
		ejs: "./bin/cli.js"
	};
	var main$1 = "./lib/ejs.js";
	var jsdelivr = "ejs.min.js";
	var unpkg = "ejs.min.js";
	var repository = {
		type: "git",
		url: "git://github.com/mde/ejs.git"
	};
	var bugs = "https://github.com/mde/ejs/issues";
	var homepage = "https://github.com/mde/ejs";
	var dependencies = {
		jake: "^10.6.1"
	};
	var devDependencies = {
		browserify: "^16.5.1",
		eslint: "^6.8.0",
		"git-directory-deploy": "^1.5.1",
		jsdoc: "^3.6.4",
		"lru-cache": "^4.0.1",
		mocha: "^7.1.1",
		"uglify-js": "^3.3.16"
	};
	var engines = {
		node: ">=0.10.0"
	};
	var scripts = {
		test: "mocha"
	};
	var require$$3 = {
		name: name,
		description: description,
		keywords: keywords,
		version: version,
		author: author,
		license: license,
		bin: bin,
		main: main$1,
		jsdelivr: jsdelivr,
		unpkg: unpkg,
		repository: repository,
		bugs: bugs,
		homepage: homepage,
		dependencies: dependencies,
		devDependencies: devDependencies,
		engines: engines,
		scripts: scripts
	};

	/*
	 * EJS Embedded JavaScript templates
	 * Copyright 2112 Matthew Eernisse (mde@fleegix.org)
	 *
	 * Licensed under the Apache License, Version 2.0 (the "License");
	 * you may not use this file except in compliance with the License.
	 * You may obtain a copy of the License at
	 *
	 *         http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 *
	*/

	(function (exports) {

	/**
	 * @file Embedded JavaScript templating engine. {@link http://ejs.co}
	 * @author Matthew Eernisse <mde@fleegix.org>
	 * @author Tiancheng "Timothy" Gu <timothygu99@gmail.com>
	 * @project EJS
	 * @license {@link http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0}
	 */

	/**
	 * EJS internal functions.
	 *
	 * Technically this "module" lies in the same file as {@link module:ejs}, for
	 * the sake of organization all the private functions re grouped into this
	 * module.
	 *
	 * @module ejs-internal
	 * @private
	 */

	/**
	 * Embedded JavaScript templating engine.
	 *
	 * @module ejs
	 * @public
	 */

	var fs = require$$0;
	var path = require$$1;
	var utils$1 = utils;

	var scopeOptionWarned = false;
	/** @type {string} */
	var _VERSION_STRING = require$$3.version;
	var _DEFAULT_OPEN_DELIMITER = '<';
	var _DEFAULT_CLOSE_DELIMITER = '>';
	var _DEFAULT_DELIMITER = '%';
	var _DEFAULT_LOCALS_NAME = 'locals';
	var _NAME = 'ejs';
	var _REGEX_STRING = '(<%%|%%>|<%=|<%-|<%_|<%#|<%|%>|-%>|_%>)';
	var _OPTS_PASSABLE_WITH_DATA = ['delimiter', 'scope', 'context', 'debug', 'compileDebug',
	  'client', '_with', 'rmWhitespace', 'strict', 'filename', 'async'];
	// We don't allow 'cache' option to be passed in the data obj for
	// the normal `render` call, but this is where Express 2 & 3 put it
	// so we make an exception for `renderFile`
	var _OPTS_PASSABLE_WITH_DATA_EXPRESS = _OPTS_PASSABLE_WITH_DATA.concat('cache');
	var _BOM = /^\uFEFF/;

	/**
	 * EJS template function cache. This can be a LRU object from lru-cache NPM
	 * module. By default, it is {@link module:utils.cache}, a simple in-process
	 * cache that grows continuously.
	 *
	 * @type {Cache}
	 */

	exports.cache = utils$1.cache;

	/**
	 * Custom file loader. Useful for template preprocessing or restricting access
	 * to a certain part of the filesystem.
	 *
	 * @type {fileLoader}
	 */

	exports.fileLoader = fs.readFileSync;

	/**
	 * Name of the object containing the locals.
	 *
	 * This variable is overridden by {@link Options}`.localsName` if it is not
	 * `undefined`.
	 *
	 * @type {String}
	 * @public
	 */

	exports.localsName = _DEFAULT_LOCALS_NAME;

	/**
	 * Promise implementation -- defaults to the native implementation if available
	 * This is mostly just for testability
	 *
	 * @type {PromiseConstructorLike}
	 * @public
	 */

	exports.promiseImpl = (new Function('return this;'))().Promise;

	/**
	 * Get the path to the included file from the parent file path and the
	 * specified path.
	 *
	 * @param {String}  name     specified path
	 * @param {String}  filename parent file path
	 * @param {Boolean} [isDir=false] whether the parent file path is a directory
	 * @return {String}
	 */
	exports.resolveInclude = function(name, filename, isDir) {
	  var dirname = path.dirname;
	  var extname = path.extname;
	  var resolve = path.resolve;
	  var includePath = resolve(isDir ? filename : dirname(filename), name);
	  var ext = extname(name);
	  if (!ext) {
	    includePath += '.ejs';
	  }
	  return includePath;
	};

	/**
	 * Try to resolve file path on multiple directories
	 *
	 * @param  {String}        name  specified path
	 * @param  {Array<String>} paths list of possible parent directory paths
	 * @return {String}
	 */
	function resolvePaths(name, paths) {
	  var filePath;
	  if (paths.some(function (v) {
	    filePath = exports.resolveInclude(name, v, true);
	    return fs.existsSync(filePath);
	  })) {
	    return filePath;
	  }
	}

	/**
	 * Get the path to the included file by Options
	 *
	 * @param  {String}  path    specified path
	 * @param  {Options} options compilation options
	 * @return {String}
	 */
	function getIncludePath(path, options) {
	  var includePath;
	  var filePath;
	  var views = options.views;
	  var match = /^[A-Za-z]+:\\|^\//.exec(path);

	  // Abs path
	  if (match && match.length) {
	    path = path.replace(/^\/*/, '');
	    if (Array.isArray(options.root)) {
	      includePath = resolvePaths(path, options.root);
	    } else {
	      includePath = exports.resolveInclude(path, options.root || '/', true);
	    }
	  }
	  // Relative paths
	  else {
	    // Look relative to a passed filename first
	    if (options.filename) {
	      filePath = exports.resolveInclude(path, options.filename);
	      if (fs.existsSync(filePath)) {
	        includePath = filePath;
	      }
	    }
	    // Then look in any views directories
	    if (!includePath && Array.isArray(views)) {
	      includePath = resolvePaths(path, views);
	    }
	    if (!includePath && typeof options.includer !== 'function') {
	      throw new Error('Could not find the include file "' +
	          options.escapeFunction(path) + '"');
	    }
	  }
	  return includePath;
	}

	/**
	 * Get the template from a string or a file, either compiled on-the-fly or
	 * read from cache (if enabled), and cache the template if needed.
	 *
	 * If `template` is not set, the file specified in `options.filename` will be
	 * read.
	 *
	 * If `options.cache` is true, this function reads the file from
	 * `options.filename` so it must be set prior to calling this function.
	 *
	 * @memberof module:ejs-internal
	 * @param {Options} options   compilation options
	 * @param {String} [template] template source
	 * @return {(TemplateFunction|ClientFunction)}
	 * Depending on the value of `options.client`, either type might be returned.
	 * @static
	 */

	function handleCache(options, template) {
	  var func;
	  var filename = options.filename;
	  var hasTemplate = arguments.length > 1;

	  if (options.cache) {
	    if (!filename) {
	      throw new Error('cache option requires a filename');
	    }
	    func = exports.cache.get(filename);
	    if (func) {
	      return func;
	    }
	    if (!hasTemplate) {
	      template = fileLoader(filename).toString().replace(_BOM, '');
	    }
	  }
	  else if (!hasTemplate) {
	    // istanbul ignore if: should not happen at all
	    if (!filename) {
	      throw new Error('Internal EJS error: no file name or template '
	                    + 'provided');
	    }
	    template = fileLoader(filename).toString().replace(_BOM, '');
	  }
	  func = exports.compile(template, options);
	  if (options.cache) {
	    exports.cache.set(filename, func);
	  }
	  return func;
	}

	/**
	 * Try calling handleCache with the given options and data and call the
	 * callback with the result. If an error occurs, call the callback with
	 * the error. Used by renderFile().
	 *
	 * @memberof module:ejs-internal
	 * @param {Options} options    compilation options
	 * @param {Object} data        template data
	 * @param {RenderFileCallback} cb callback
	 * @static
	 */

	function tryHandleCache(options, data, cb) {
	  var result;
	  if (!cb) {
	    if (typeof exports.promiseImpl == 'function') {
	      return new exports.promiseImpl(function (resolve, reject) {
	        try {
	          result = handleCache(options)(data);
	          resolve(result);
	        }
	        catch (err) {
	          reject(err);
	        }
	      });
	    }
	    else {
	      throw new Error('Please provide a callback function');
	    }
	  }
	  else {
	    try {
	      result = handleCache(options)(data);
	    }
	    catch (err) {
	      return cb(err);
	    }

	    cb(null, result);
	  }
	}

	/**
	 * fileLoader is independent
	 *
	 * @param {String} filePath ejs file path.
	 * @return {String} The contents of the specified file.
	 * @static
	 */

	function fileLoader(filePath){
	  return exports.fileLoader(filePath);
	}

	/**
	 * Get the template function.
	 *
	 * If `options.cache` is `true`, then the template is cached.
	 *
	 * @memberof module:ejs-internal
	 * @param {String}  path    path for the specified file
	 * @param {Options} options compilation options
	 * @return {(TemplateFunction|ClientFunction)}
	 * Depending on the value of `options.client`, either type might be returned
	 * @static
	 */

	function includeFile(path, options) {
	  var opts = utils$1.shallowCopy({}, options);
	  opts.filename = getIncludePath(path, opts);
	  if (typeof options.includer === 'function') {
	    var includerResult = options.includer(path, opts.filename);
	    if (includerResult) {
	      if (includerResult.filename) {
	        opts.filename = includerResult.filename;
	      }
	      if (includerResult.template) {
	        return handleCache(opts, includerResult.template);
	      }
	    }
	  }
	  return handleCache(opts);
	}

	/**
	 * Re-throw the given `err` in context to the `str` of ejs, `filename`, and
	 * `lineno`.
	 *
	 * @implements {RethrowCallback}
	 * @memberof module:ejs-internal
	 * @param {Error}  err      Error object
	 * @param {String} str      EJS source
	 * @param {String} flnm     file name of the EJS file
	 * @param {Number} lineno   line number of the error
	 * @param {EscapeCallback} esc
	 * @static
	 */

	function rethrow(err, str, flnm, lineno, esc) {
	  var lines = str.split('\n');
	  var start = Math.max(lineno - 3, 0);
	  var end = Math.min(lines.length, lineno + 3);
	  var filename = esc(flnm);
	  // Error context
	  var context = lines.slice(start, end).map(function (line, i){
	    var curr = i + start + 1;
	    return (curr == lineno ? ' >> ' : '    ')
	      + curr
	      + '| '
	      + line;
	  }).join('\n');

	  // Alter exception message
	  err.path = filename;
	  err.message = (filename || 'ejs') + ':'
	    + lineno + '\n'
	    + context + '\n\n'
	    + err.message;

	  throw err;
	}

	function stripSemi(str){
	  return str.replace(/;(\s*$)/, '$1');
	}

	/**
	 * Compile the given `str` of ejs into a template function.
	 *
	 * @param {String}  template EJS template
	 *
	 * @param {Options} [opts] compilation options
	 *
	 * @return {(TemplateFunction|ClientFunction)}
	 * Depending on the value of `opts.client`, either type might be returned.
	 * Note that the return type of the function also depends on the value of `opts.async`.
	 * @public
	 */

	exports.compile = function compile(template, opts) {
	  var templ;

	  // v1 compat
	  // 'scope' is 'context'
	  // FIXME: Remove this in a future version
	  if (opts && opts.scope) {
	    if (!scopeOptionWarned){
	      console.warn('`scope` option is deprecated and will be removed in EJS 3');
	      scopeOptionWarned = true;
	    }
	    if (!opts.context) {
	      opts.context = opts.scope;
	    }
	    delete opts.scope;
	  }
	  templ = new Template(template, opts);
	  return templ.compile();
	};

	/**
	 * Render the given `template` of ejs.
	 *
	 * If you would like to include options but not data, you need to explicitly
	 * call this function with `data` being an empty object or `null`.
	 *
	 * @param {String}   template EJS template
	 * @param {Object}  [data={}] template data
	 * @param {Options} [opts={}] compilation and rendering options
	 * @return {(String|Promise<String>)}
	 * Return value type depends on `opts.async`.
	 * @public
	 */

	exports.render = function (template, d, o) {
	  var data = d || {};
	  var opts = o || {};

	  // No options object -- if there are optiony names
	  // in the data, copy them to options
	  if (arguments.length == 2) {
	    utils$1.shallowCopyFromList(opts, data, _OPTS_PASSABLE_WITH_DATA);
	  }

	  return handleCache(opts, template)(data);
	};

	/**
	 * Render an EJS file at the given `path` and callback `cb(err, str)`.
	 *
	 * If you would like to include options but not data, you need to explicitly
	 * call this function with `data` being an empty object or `null`.
	 *
	 * @param {String}             path     path to the EJS file
	 * @param {Object}            [data={}] template data
	 * @param {Options}           [opts={}] compilation and rendering options
	 * @param {RenderFileCallback} cb callback
	 * @public
	 */

	exports.renderFile = function () {
	  var args = Array.prototype.slice.call(arguments);
	  var filename = args.shift();
	  var cb;
	  var opts = {filename: filename};
	  var data;
	  var viewOpts;

	  // Do we have a callback?
	  if (typeof arguments[arguments.length - 1] == 'function') {
	    cb = args.pop();
	  }
	  // Do we have data/opts?
	  if (args.length) {
	    // Should always have data obj
	    data = args.shift();
	    // Normal passed opts (data obj + opts obj)
	    if (args.length) {
	      // Use shallowCopy so we don't pollute passed in opts obj with new vals
	      utils$1.shallowCopy(opts, args.pop());
	    }
	    // Special casing for Express (settings + opts-in-data)
	    else {
	      // Express 3 and 4
	      if (data.settings) {
	        // Pull a few things from known locations
	        if (data.settings.views) {
	          opts.views = data.settings.views;
	        }
	        if (data.settings['view cache']) {
	          opts.cache = true;
	        }
	        // Undocumented after Express 2, but still usable, esp. for
	        // items that are unsafe to be passed along with data, like `root`
	        viewOpts = data.settings['view options'];
	        if (viewOpts) {
	          utils$1.shallowCopy(opts, viewOpts);
	        }
	      }
	      // Express 2 and lower, values set in app.locals, or people who just
	      // want to pass options in their data. NOTE: These values will override
	      // anything previously set in settings  or settings['view options']
	      utils$1.shallowCopyFromList(opts, data, _OPTS_PASSABLE_WITH_DATA_EXPRESS);
	    }
	    opts.filename = filename;
	  }
	  else {
	    data = {};
	  }

	  return tryHandleCache(opts, data, cb);
	};

	/**
	 * Clear intermediate JavaScript cache. Calls {@link Cache#reset}.
	 * @public
	 */

	/**
	 * EJS template class
	 * @public
	 */
	exports.Template = Template;

	exports.clearCache = function () {
	  exports.cache.reset();
	};

	function Template(text, opts) {
	  opts = opts || {};
	  var options = {};
	  this.templateText = text;
	  /** @type {string | null} */
	  this.mode = null;
	  this.truncate = false;
	  this.currentLine = 1;
	  this.source = '';
	  options.client = opts.client || false;
	  options.escapeFunction = opts.escape || opts.escapeFunction || utils$1.escapeXML;
	  options.compileDebug = opts.compileDebug !== false;
	  options.debug = !!opts.debug;
	  options.filename = opts.filename;
	  options.openDelimiter = opts.openDelimiter || exports.openDelimiter || _DEFAULT_OPEN_DELIMITER;
	  options.closeDelimiter = opts.closeDelimiter || exports.closeDelimiter || _DEFAULT_CLOSE_DELIMITER;
	  options.delimiter = opts.delimiter || exports.delimiter || _DEFAULT_DELIMITER;
	  options.strict = opts.strict || false;
	  options.context = opts.context;
	  options.cache = opts.cache || false;
	  options.rmWhitespace = opts.rmWhitespace;
	  options.root = opts.root;
	  options.includer = opts.includer;
	  options.outputFunctionName = opts.outputFunctionName;
	  options.localsName = opts.localsName || exports.localsName || _DEFAULT_LOCALS_NAME;
	  options.views = opts.views;
	  options.async = opts.async;
	  options.destructuredLocals = opts.destructuredLocals;
	  options.legacyInclude = typeof opts.legacyInclude != 'undefined' ? !!opts.legacyInclude : true;

	  if (options.strict) {
	    options._with = false;
	  }
	  else {
	    options._with = typeof opts._with != 'undefined' ? opts._with : true;
	  }

	  this.opts = options;

	  this.regex = this.createRegex();
	}

	Template.modes = {
	  EVAL: 'eval',
	  ESCAPED: 'escaped',
	  RAW: 'raw',
	  COMMENT: 'comment',
	  LITERAL: 'literal'
	};

	Template.prototype = {
	  createRegex: function () {
	    var str = _REGEX_STRING;
	    var delim = utils$1.escapeRegExpChars(this.opts.delimiter);
	    var open = utils$1.escapeRegExpChars(this.opts.openDelimiter);
	    var close = utils$1.escapeRegExpChars(this.opts.closeDelimiter);
	    str = str.replace(/%/g, delim)
	      .replace(/</g, open)
	      .replace(/>/g, close);
	    return new RegExp(str);
	  },

	  compile: function () {
	    /** @type {string} */
	    var src;
	    /** @type {ClientFunction} */
	    var fn;
	    var opts = this.opts;
	    var prepended = '';
	    var appended = '';
	    /** @type {EscapeCallback} */
	    var escapeFn = opts.escapeFunction;
	    /** @type {FunctionConstructor} */
	    var ctor;
	    /** @type {string} */
	    var sanitizedFilename = opts.filename ? JSON.stringify(opts.filename) : 'undefined';

	    if (!this.source) {
	      this.generateSource();
	      prepended +=
	        '  var __output = "";\n' +
	        '  function __append(s) { if (s !== undefined && s !== null) __output += s }\n';
	      if (opts.outputFunctionName) {
	        prepended += '  var ' + opts.outputFunctionName + ' = __append;' + '\n';
	      }
	      if (opts.destructuredLocals && opts.destructuredLocals.length) {
	        var destructuring = '  var __locals = (' + opts.localsName + ' || {}),\n';
	        for (var i = 0; i < opts.destructuredLocals.length; i++) {
	          var name = opts.destructuredLocals[i];
	          if (i > 0) {
	            destructuring += ',\n  ';
	          }
	          destructuring += name + ' = __locals.' + name;
	        }
	        prepended += destructuring + ';\n';
	      }
	      if (opts._with !== false) {
	        prepended +=  '  with (' + opts.localsName + ' || {}) {' + '\n';
	        appended += '  }' + '\n';
	      }
	      appended += '  return __output;' + '\n';
	      this.source = prepended + this.source + appended;
	    }

	    if (opts.compileDebug) {
	      src = 'var __line = 1' + '\n'
	        + '  , __lines = ' + JSON.stringify(this.templateText) + '\n'
	        + '  , __filename = ' + sanitizedFilename + ';' + '\n'
	        + 'try {' + '\n'
	        + this.source
	        + '} catch (e) {' + '\n'
	        + '  rethrow(e, __lines, __filename, __line, escapeFn);' + '\n'
	        + '}' + '\n';
	    }
	    else {
	      src = this.source;
	    }

	    if (opts.client) {
	      src = 'escapeFn = escapeFn || ' + escapeFn.toString() + ';' + '\n' + src;
	      if (opts.compileDebug) {
	        src = 'rethrow = rethrow || ' + rethrow.toString() + ';' + '\n' + src;
	      }
	    }

	    if (opts.strict) {
	      src = '"use strict";\n' + src;
	    }
	    if (opts.debug) {
	      console.log(src);
	    }
	    if (opts.compileDebug && opts.filename) {
	      src = src + '\n'
	        + '//# sourceURL=' + sanitizedFilename + '\n';
	    }

	    try {
	      if (opts.async) {
	        // Have to use generated function for this, since in envs without support,
	        // it breaks in parsing
	        try {
	          ctor = (new Function('return (async function(){}).constructor;'))();
	        }
	        catch(e) {
	          if (e instanceof SyntaxError) {
	            throw new Error('This environment does not support async/await');
	          }
	          else {
	            throw e;
	          }
	        }
	      }
	      else {
	        ctor = Function;
	      }
	      fn = new ctor(opts.localsName + ', escapeFn, include, rethrow', src);
	    }
	    catch(e) {
	      // istanbul ignore else
	      if (e instanceof SyntaxError) {
	        if (opts.filename) {
	          e.message += ' in ' + opts.filename;
	        }
	        e.message += ' while compiling ejs\n\n';
	        e.message += 'If the above error is not helpful, you may want to try EJS-Lint:\n';
	        e.message += 'https://github.com/RyanZim/EJS-Lint';
	        if (!opts.async) {
	          e.message += '\n';
	          e.message += 'Or, if you meant to create an async function, pass `async: true` as an option.';
	        }
	      }
	      throw e;
	    }

	    // Return a callable function which will execute the function
	    // created by the source-code, with the passed data as locals
	    // Adds a local `include` function which allows full recursive include
	    var returnedFn = opts.client ? fn : function anonymous(data) {
	      var include = function (path, includeData) {
	        var d = utils$1.shallowCopy({}, data);
	        if (includeData) {
	          d = utils$1.shallowCopy(d, includeData);
	        }
	        return includeFile(path, opts)(d);
	      };
	      return fn.apply(opts.context, [data || {}, escapeFn, include, rethrow]);
	    };
	    if (opts.filename && typeof Object.defineProperty === 'function') {
	      var filename = opts.filename;
	      var basename = path.basename(filename, path.extname(filename));
	      try {
	        Object.defineProperty(returnedFn, 'name', {
	          value: basename,
	          writable: false,
	          enumerable: false,
	          configurable: true
	        });
	      } catch (e) {/* ignore */}
	    }
	    return returnedFn;
	  },

	  generateSource: function () {
	    var opts = this.opts;

	    if (opts.rmWhitespace) {
	      // Have to use two separate replace here as `^` and `$` operators don't
	      // work well with `\r` and empty lines don't work well with the `m` flag.
	      this.templateText =
	        this.templateText.replace(/[\r\n]+/g, '\n').replace(/^\s+|\s+$/gm, '');
	    }

	    // Slurp spaces and tabs before <%_ and after _%>
	    this.templateText =
	      this.templateText.replace(/[ \t]*<%_/gm, '<%_').replace(/_%>[ \t]*/gm, '_%>');

	    var self = this;
	    var matches = this.parseTemplateText();
	    var d = this.opts.delimiter;
	    var o = this.opts.openDelimiter;
	    var c = this.opts.closeDelimiter;

	    if (matches && matches.length) {
	      matches.forEach(function (line, index) {
	        var closing;
	        // If this is an opening tag, check for closing tags
	        // FIXME: May end up with some false positives here
	        // Better to store modes as k/v with openDelimiter + delimiter as key
	        // Then this can simply check against the map
	        if ( line.indexOf(o + d) === 0        // If it is a tag
	          && line.indexOf(o + d + d) !== 0) { // and is not escaped
	          closing = matches[index + 2];
	          if (!(closing == d + c || closing == '-' + d + c || closing == '_' + d + c)) {
	            throw new Error('Could not find matching close tag for "' + line + '".');
	          }
	        }
	        self.scanLine(line);
	      });
	    }

	  },

	  parseTemplateText: function () {
	    var str = this.templateText;
	    var pat = this.regex;
	    var result = pat.exec(str);
	    var arr = [];
	    var firstPos;

	    while (result) {
	      firstPos = result.index;

	      if (firstPos !== 0) {
	        arr.push(str.substring(0, firstPos));
	        str = str.slice(firstPos);
	      }

	      arr.push(result[0]);
	      str = str.slice(result[0].length);
	      result = pat.exec(str);
	    }

	    if (str) {
	      arr.push(str);
	    }

	    return arr;
	  },

	  _addOutput: function (line) {
	    if (this.truncate) {
	      // Only replace single leading linebreak in the line after
	      // -%> tag -- this is the single, trailing linebreak
	      // after the tag that the truncation mode replaces
	      // Handle Win / Unix / old Mac linebreaks -- do the \r\n
	      // combo first in the regex-or
	      line = line.replace(/^(?:\r\n|\r|\n)/, '');
	      this.truncate = false;
	    }
	    if (!line) {
	      return line;
	    }

	    // Preserve literal slashes
	    line = line.replace(/\\/g, '\\\\');

	    // Convert linebreaks
	    line = line.replace(/\n/g, '\\n');
	    line = line.replace(/\r/g, '\\r');

	    // Escape double-quotes
	    // - this will be the delimiter during execution
	    line = line.replace(/"/g, '\\"');
	    this.source += '    ; __append("' + line + '")' + '\n';
	  },

	  scanLine: function (line) {
	    var self = this;
	    var d = this.opts.delimiter;
	    var o = this.opts.openDelimiter;
	    var c = this.opts.closeDelimiter;
	    var newLineCount = 0;

	    newLineCount = (line.split('\n').length - 1);

	    switch (line) {
	    case o + d:
	    case o + d + '_':
	      this.mode = Template.modes.EVAL;
	      break;
	    case o + d + '=':
	      this.mode = Template.modes.ESCAPED;
	      break;
	    case o + d + '-':
	      this.mode = Template.modes.RAW;
	      break;
	    case o + d + '#':
	      this.mode = Template.modes.COMMENT;
	      break;
	    case o + d + d:
	      this.mode = Template.modes.LITERAL;
	      this.source += '    ; __append("' + line.replace(o + d + d, o + d) + '")' + '\n';
	      break;
	    case d + d + c:
	      this.mode = Template.modes.LITERAL;
	      this.source += '    ; __append("' + line.replace(d + d + c, d + c) + '")' + '\n';
	      break;
	    case d + c:
	    case '-' + d + c:
	    case '_' + d + c:
	      if (this.mode == Template.modes.LITERAL) {
	        this._addOutput(line);
	      }

	      this.mode = null;
	      this.truncate = line.indexOf('-') === 0 || line.indexOf('_') === 0;
	      break;
	    default:
	      // In script mode, depends on type of tag
	      if (this.mode) {
	        // If '//' is found without a line break, add a line break.
	        switch (this.mode) {
	        case Template.modes.EVAL:
	        case Template.modes.ESCAPED:
	        case Template.modes.RAW:
	          if (line.lastIndexOf('//') > line.lastIndexOf('\n')) {
	            line += '\n';
	          }
	        }
	        switch (this.mode) {
	        // Just executing code
	        case Template.modes.EVAL:
	          this.source += '    ; ' + line + '\n';
	          break;
	          // Exec, esc, and output
	        case Template.modes.ESCAPED:
	          this.source += '    ; __append(escapeFn(' + stripSemi(line) + '))' + '\n';
	          break;
	          // Exec and output
	        case Template.modes.RAW:
	          this.source += '    ; __append(' + stripSemi(line) + ')' + '\n';
	          break;
	        case Template.modes.COMMENT:
	          // Do nothing
	          break;
	          // Literal <%% mode, append as raw output
	        case Template.modes.LITERAL:
	          this._addOutput(line);
	          break;
	        }
	      }
	      // In string mode, just add the output
	      else {
	        this._addOutput(line);
	      }
	    }

	    if (self.opts.compileDebug && newLineCount) {
	      this.currentLine += newLineCount;
	      this.source += '    ; __line = ' + this.currentLine + '\n';
	    }
	  }
	};

	/**
	 * Escape characters reserved in XML.
	 *
	 * This is simply an export of {@link module:utils.escapeXML}.
	 *
	 * If `markup` is `undefined` or `null`, the empty string is returned.
	 *
	 * @param {String} markup Input string
	 * @return {String} Escaped string
	 * @public
	 * @func
	 * */
	exports.escapeXML = utils$1.escapeXML;

	/**
	 * Express.js support.
	 *
	 * This is an alias for {@link module:ejs.renderFile}, in order to support
	 * Express.js out-of-the-box.
	 *
	 * @func
	 */

	exports.__express = exports.renderFile;

	/**
	 * Version of EJS.
	 *
	 * @readonly
	 * @type {String}
	 * @public
	 */

	exports.VERSION = _VERSION_STRING;

	/**
	 * Name for detection of EJS.
	 *
	 * @readonly
	 * @type {String}
	 * @public
	 */

	exports.name = _NAME;

	/* istanbul ignore if */
	if (typeof window != 'undefined') {
	  window.ejs = exports;
	}
	}(ejs));

	// require('@babel/polyfill')
	var main = ejs;

	return main;

}));