171 lines
4.3 KiB
JavaScript
171 lines
4.3 KiB
JavaScript
'use strict';
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const stringify = require('./lib/stringify');
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const compile = require('./lib/compile');
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const expand = require('./lib/expand');
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const parse = require('./lib/parse');
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/**
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* Expand the given pattern or create a regex-compatible string.
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*
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* ```js
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* const braces = require('braces');
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* console.log(braces('{a,b,c}', { compile: true })); //=> ['(a|b|c)']
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* console.log(braces('{a,b,c}')); //=> ['a', 'b', 'c']
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* ```
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* @param {String} `str`
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* @param {Object} `options`
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* @return {String}
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* @api public
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*/
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const braces = (input, options = {}) => {
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let output = [];
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if (Array.isArray(input)) {
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for (let pattern of input) {
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let result = braces.create(pattern, options);
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if (Array.isArray(result)) {
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output.push(...result);
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} else {
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output.push(result);
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}
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}
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} else {
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output = [].concat(braces.create(input, options));
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}
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if (options && options.expand === true && options.nodupes === true) {
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output = [...new Set(output)];
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}
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return output;
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};
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/**
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* Parse the given `str` with the given `options`.
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*
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* ```js
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* // braces.parse(pattern, [, options]);
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* const ast = braces.parse('a/{b,c}/d');
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* console.log(ast);
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* ```
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* @param {String} pattern Brace pattern to parse
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* @param {Object} options
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* @return {Object} Returns an AST
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* @api public
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*/
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braces.parse = (input, options = {}) => parse(input, options);
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/**
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* Creates a braces string from an AST, or an AST node.
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*
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* ```js
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* const braces = require('braces');
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* let ast = braces.parse('foo/{a,b}/bar');
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* console.log(stringify(ast.nodes[2])); //=> '{a,b}'
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* ```
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* @param {String} `input` Brace pattern or AST.
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* @param {Object} `options`
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* @return {Array} Returns an array of expanded values.
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* @api public
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*/
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braces.stringify = (input, options = {}) => {
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if (typeof input === 'string') {
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return stringify(braces.parse(input, options), options);
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}
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return stringify(input, options);
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};
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/**
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* Compiles a brace pattern into a regex-compatible, optimized string.
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* This method is called by the main [braces](#braces) function by default.
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*
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* ```js
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* const braces = require('braces');
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* console.log(braces.compile('a/{b,c}/d'));
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* //=> ['a/(b|c)/d']
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* ```
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* @param {String} `input` Brace pattern or AST.
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* @param {Object} `options`
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* @return {Array} Returns an array of expanded values.
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* @api public
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*/
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braces.compile = (input, options = {}) => {
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if (typeof input === 'string') {
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input = braces.parse(input, options);
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}
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return compile(input, options);
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};
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/**
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* Expands a brace pattern into an array. This method is called by the
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* main [braces](#braces) function when `options.expand` is true. Before
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* using this method it's recommended that you read the [performance notes](#performance))
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* and advantages of using [.compile](#compile) instead.
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*
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* ```js
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* const braces = require('braces');
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* console.log(braces.expand('a/{b,c}/d'));
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* //=> ['a/b/d', 'a/c/d'];
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* ```
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* @param {String} `pattern` Brace pattern
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* @param {Object} `options`
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* @return {Array} Returns an array of expanded values.
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* @api public
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*/
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braces.expand = (input, options = {}) => {
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if (typeof input === 'string') {
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input = braces.parse(input, options);
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}
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let result = expand(input, options);
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// filter out empty strings if specified
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if (options.noempty === true) {
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result = result.filter(Boolean);
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}
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// filter out duplicates if specified
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if (options.nodupes === true) {
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result = [...new Set(result)];
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}
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return result;
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};
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/**
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* Processes a brace pattern and returns either an expanded array
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* (if `options.expand` is true), a highly optimized regex-compatible string.
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* This method is called by the main [braces](#braces) function.
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*
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* ```js
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* const braces = require('braces');
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* console.log(braces.create('user-{200..300}/project-{a,b,c}-{1..10}'))
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* //=> 'user-(20[0-9]|2[1-9][0-9]|300)/project-(a|b|c)-([1-9]|10)'
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* ```
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* @param {String} `pattern` Brace pattern
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* @param {Object} `options`
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* @return {Array} Returns an array of expanded values.
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* @api public
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*/
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braces.create = (input, options = {}) => {
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if (input === '' || input.length < 3) {
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return [input];
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}
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return options.expand !== true
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? braces.compile(input, options)
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: braces.expand(input, options);
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};
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/**
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* Expose "braces"
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*/
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module.exports = braces;
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