Add web front-end and fix API issues
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'use strict';
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/**
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* @import {
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* ControlOperator,
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* Env,
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* GlobPattern,
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* ParseEntry,
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* } from './parse' */
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// '<(' is process substitution operator and
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// can be parsed the same as control operator
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var CONTROL = /** @type {const} */ ('(?:') + /** @type {const} */ ([
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'\\|\\|',
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'\\&\\&',
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';;',
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'\\|\\&',
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'\\<\\(',
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'\\<\\<\\<',
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'>>',
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'>\\&',
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'<\\&',
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'[&;()|<>]'
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]).join(/** @type {const} */ ('|')) + /** @type {const} */ (')');
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var controlRE = new RegExp('^' + CONTROL + '$');
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var META = /** @type {const} */ ('|&;()<> \\t');
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var SINGLE_QUOTE = /** @type {const} */ ('"((\\\\"|[^"])*?)"');
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var DOUBLE_QUOTE = /** @type {const} */ ('\'((\\\\\'|[^\'])*?)\'');
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var hash = /^#$/;
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var SQ = /** @type {const} */ ("'");
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var DQ = /** @type {const} */ ('"');
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var DS = /** @type {const} */ ('$');
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var TOKEN = '';
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var mult = /** @type {const} */ (0x100000000); // Math.pow(16, 8);
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for (var i = 0; i < 4; i++) {
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TOKEN += (mult * Math.random()).toString(16);
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}
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var startsWithToken = new RegExp('^' + TOKEN);
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/**
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* @param {string} s
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* @param {RegExp} r
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*/
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function matchAll(s, r) {
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var origIndex = r.lastIndex;
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var matches = [];
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var matchObj;
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while ((matchObj = r.exec(s))) {
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matches[matches.length] = matchObj;
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if (r.lastIndex === matchObj.index) {
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r.lastIndex += 1;
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}
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}
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r.lastIndex = origIndex;
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return matches;
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}
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/**
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* @param {Env} env
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* @param {string} pre
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* @param {string} key
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*/
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function getVar(env, pre, key) {
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var r = typeof env === 'function' ? env(key) : env[key];
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if (typeof r === 'undefined' && key != '') {
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r = '';
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} else if (typeof r === 'undefined') {
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r = '$';
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}
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if (typeof r === 'object') {
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return pre + TOKEN + JSON.stringify(r) + TOKEN;
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}
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return pre + r;
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}
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/**
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* @param {string} string
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* @param {Env} [env]
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* @param {{ escape?: string }} [opts]
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* @returns {ParseEntry[]}
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*/
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function parseInternal(string, env, opts) {
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if (!opts) {
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opts = {};
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}
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var BS = opts.escape || '\\';
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var BAREWORD = '(\\' + BS + '[\'"' + META + ']|[^\\s\'"' + META + '])+';
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var chunker = new RegExp([
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'(' + CONTROL + ')', // control chars
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'(' + BAREWORD + '|' + SINGLE_QUOTE + '|' + DOUBLE_QUOTE + ')+'
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].join('|'), 'g');
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var matches = matchAll(string, chunker);
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if (matches.length === 0) {
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return [];
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}
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if (!env) {
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env = {};
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}
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var commented = false;
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return matches.map(function (match) {
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var s = match[0];
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if (!s || commented) {
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return void undefined;
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}
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if (controlRE.test(s)) {
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return /** @type {ControlOperator} */ ({ op: s });
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}
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// Hand-written scanner/parser for Bash quoting rules:
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//
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// 1. inside single quotes, all characters are printed literally.
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// 2. inside double quotes, all characters are printed literally
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// except variables prefixed by '$' and backslashes followed by
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// either a double quote or another backslash.
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// 3. outside of any quotes, backslashes are treated as escape
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// characters and not printed (unless they are themselves escaped)
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// 4. quote context can switch mid-token if there is no whitespace
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// between the two quote contexts (e.g. all'one'"token" parses as
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// "allonetoken")
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/** @type {string | boolean} */
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var quote = false;
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var esc = false;
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var out = '';
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var isGlob = false;
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/** @type {number} */
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var i;
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function parseEnvVar() {
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i += 1;
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/** @type {number | RegExpMatchArray | null} */
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var varend;
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/** @type {string} */
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var varname;
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var char = s.charAt(i);
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if (char === '{') {
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i += 1;
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if (s.charAt(i) === '}') {
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throw new Error('Bad substitution: ' + s.slice(i - 2, i + 1));
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}
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varend = s.indexOf('}', i);
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if (varend < 0) {
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throw new Error('Bad substitution: ' + s.slice(i));
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}
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varname = s.slice(i, varend);
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i = varend;
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} else if ((/[*@#?$!_-]/).test(char)) {
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varname = char;
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i += 1;
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} else {
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var slicedFromI = s.slice(i);
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varend = slicedFromI.match(/[^\w\d_]/);
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if (!varend) {
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varname = slicedFromI;
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i = s.length;
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} else {
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varname = slicedFromI.slice(0, varend.index);
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i += /** @type {number} */ (varend.index) - 1;
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}
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}
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return getVar(/** @type {NonNullable<typeof env>} */ (env), '', varname);
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}
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for (i = 0; i < s.length; i++) {
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var c = s.charAt(i);
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isGlob = isGlob || (!quote && (c === '*' || c === '?'));
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if (esc) {
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out += c;
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esc = false;
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} else if (quote) {
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if (c === quote) {
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quote = false;
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} else if (quote == SQ) {
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out += c;
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} else { // Double quote
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if (c === BS) {
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i += 1;
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c = s.charAt(i);
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if (c === DQ || c === BS || c === DS) {
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out += c;
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} else {
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out += BS + c;
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}
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} else if (c === DS) {
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out += parseEnvVar();
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} else {
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out += c;
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}
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}
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} else if (c === DQ || c === SQ) {
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quote = c;
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} else if (controlRE.test(c)) {
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return /** @type {ControlOperator} */ ({ op: s });
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} else if (hash.test(c)) {
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commented = true;
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var commentObj = { comment: string.slice(match.index + i + 1) };
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if (out.length) {
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return /** @type {const} */ ([out, commentObj]);
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}
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return /** @type {const} */ ([commentObj]);
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} else if (c === BS) {
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esc = true;
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} else if (c === DS) {
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out += parseEnvVar();
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} else {
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out += c;
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}
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}
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if (isGlob) {
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return /** @type {GlobPattern} */ ({ op: 'glob', pattern: out });
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}
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return out;
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}).reduce(function (prev, arg) { // finalize parsed arguments
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if (typeof arg === 'undefined') {
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return prev;
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}
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/** @type {ParseEntry[]} */ ([]).concat(arg).forEach(function (entry) {
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prev[prev.length] = entry;
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});
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return prev;
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}, /** @type {ParseEntry[]} */ ([]));
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}
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/** @type {import('./parse')} */
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module.exports = function parse(s, env, opts) {
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var mapped = parseInternal(s, env, opts);
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if (typeof env !== 'function') {
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return mapped;
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}
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return mapped.reduce(function (acc, s) {
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if (typeof s === 'object') {
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acc[acc.length] = s;
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return acc;
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}
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var xs = s.split(RegExp('(' + TOKEN + '.*?' + TOKEN + ')', 'g'));
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if (xs.length === 1) {
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acc[acc.length] = xs[0];
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return acc;
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}
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xs.filter(Boolean).forEach(function (x) {
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acc[acc.length] = startsWithToken.test(x)
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? JSON.parse(x.split(TOKEN)[1])
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: x;
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});
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return acc;
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}, /** @type {ParseEntry[]} */ ([]));
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};
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