+++ /dev/null
-'use strict';
-
-var Node = require('snapdragon-node');
-var utils = require('./utils');
-
-/**
- * Braces parsers
- */
-
-module.exports = function(braces, options) {
- braces.parser
- .set('bos', function() {
- if (!this.parsed) {
- this.ast = this.nodes[0] = new Node(this.ast);
- }
- })
-
- /**
- * Character parsers
- */
-
- .set('escape', function() {
- var pos = this.position();
- var m = this.match(/^(?:\\(.)|\$\{)/);
- if (!m) return;
-
- var prev = this.prev();
- var last = utils.last(prev.nodes);
-
- var node = pos(new Node({
- type: 'text',
- multiplier: 1,
- val: m[0]
- }));
-
- if (node.val === '\\\\') {
- return node;
- }
-
- if (node.val === '${') {
- var str = this.input;
- var idx = -1;
- var ch;
-
- while ((ch = str[++idx])) {
- this.consume(1);
- node.val += ch;
- if (ch === '\\') {
- node.val += str[++idx];
- continue;
- }
- if (ch === '}') {
- break;
- }
- }
- }
-
- if (this.options.unescape !== false) {
- node.val = node.val.replace(/\\([{}])/g, '$1');
- }
-
- if (last.val === '"' && this.input.charAt(0) === '"') {
- last.val = node.val;
- this.consume(1);
- return;
- }
-
- return concatNodes.call(this, pos, node, prev, options);
- })
-
- /**
- * Brackets: "[...]" (basic, this is overridden by
- * other parsers in more advanced implementations)
- */
-
- .set('bracket', function() {
- var isInside = this.isInside('brace');
- var pos = this.position();
- var m = this.match(/^(?:\[([!^]?)([^\]]{2,}|\]-)(\]|[^*+?]+)|\[)/);
- if (!m) return;
-
- var prev = this.prev();
- var val = m[0];
- var negated = m[1] ? '^' : '';
- var inner = m[2] || '';
- var close = m[3] || '';
-
- if (isInside && prev.type === 'brace') {
- prev.text = prev.text || '';
- prev.text += val;
- }
-
- var esc = this.input.slice(0, 2);
- if (inner === '' && esc === '\\]') {
- inner += esc;
- this.consume(2);
-
- var str = this.input;
- var idx = -1;
- var ch;
-
- while ((ch = str[++idx])) {
- this.consume(1);
- if (ch === ']') {
- close = ch;
- break;
- }
- inner += ch;
- }
- }
-
- return pos(new Node({
- type: 'bracket',
- val: val,
- escaped: close !== ']',
- negated: negated,
- inner: inner,
- close: close
- }));
- })
-
- /**
- * Empty braces (we capture these early to
- * speed up processing in the compiler)
- */
-
- .set('multiplier', function() {
- var isInside = this.isInside('brace');
- var pos = this.position();
- var m = this.match(/^\{((?:,|\{,+\})+)\}/);
- if (!m) return;
-
- this.multiplier = true;
- var prev = this.prev();
- var val = m[0];
-
- if (isInside && prev.type === 'brace') {
- prev.text = prev.text || '';
- prev.text += val;
- }
-
- var node = pos(new Node({
- type: 'text',
- multiplier: 1,
- match: m,
- val: val
- }));
-
- return concatNodes.call(this, pos, node, prev, options);
- })
-
- /**
- * Open
- */
-
- .set('brace.open', function() {
- var pos = this.position();
- var m = this.match(/^\{(?!(?:[^\\}]?|,+)\})/);
- if (!m) return;
-
- var prev = this.prev();
- var last = utils.last(prev.nodes);
-
- // if the last parsed character was an extglob character
- // we need to _not optimize_ the brace pattern because
- // it might be mistaken for an extglob by a downstream parser
- if (last && last.val && isExtglobChar(last.val.slice(-1))) {
- last.optimize = false;
- }
-
- var open = pos(new Node({
- type: 'brace.open',
- val: m[0]
- }));
-
- var node = pos(new Node({
- type: 'brace',
- nodes: []
- }));
-
- node.push(open);
- prev.push(node);
- this.push('brace', node);
- })
-
- /**
- * Close
- */
-
- .set('brace.close', function() {
- var pos = this.position();
- var m = this.match(/^\}/);
- if (!m || !m[0]) return;
-
- var brace = this.pop('brace');
- var node = pos(new Node({
- type: 'brace.close',
- val: m[0]
- }));
-
- if (!this.isType(brace, 'brace')) {
- if (this.options.strict) {
- throw new Error('missing opening "{"');
- }
- node.type = 'text';
- node.multiplier = 0;
- node.escaped = true;
- return node;
- }
-
- var prev = this.prev();
- var last = utils.last(prev.nodes);
- if (last.text) {
- var lastNode = utils.last(last.nodes);
- if (lastNode.val === ')' && /[!@*?+]\(/.test(last.text)) {
- var open = last.nodes[0];
- var text = last.nodes[1];
- if (open.type === 'brace.open' && text && text.type === 'text') {
- text.optimize = false;
- }
- }
- }
-
- if (brace.nodes.length > 2) {
- var first = brace.nodes[1];
- if (first.type === 'text' && first.val === ',') {
- brace.nodes.splice(1, 1);
- brace.nodes.push(first);
- }
- }
-
- brace.push(node);
- })
-
- /**
- * Capture boundary characters
- */
-
- .set('boundary', function() {
- var pos = this.position();
- var m = this.match(/^[$^](?!\{)/);
- if (!m) return;
- return pos(new Node({
- type: 'text',
- val: m[0]
- }));
- })
-
- /**
- * One or zero, non-comma characters wrapped in braces
- */
-
- .set('nobrace', function() {
- var isInside = this.isInside('brace');
- var pos = this.position();
- var m = this.match(/^\{[^,]?\}/);
- if (!m) return;
-
- var prev = this.prev();
- var val = m[0];
-
- if (isInside && prev.type === 'brace') {
- prev.text = prev.text || '';
- prev.text += val;
- }
-
- return pos(new Node({
- type: 'text',
- multiplier: 0,
- val: val
- }));
- })
-
- /**
- * Text
- */
-
- .set('text', function() {
- var isInside = this.isInside('brace');
- var pos = this.position();
- var m = this.match(/^((?!\\)[^${}[\]])+/);
- if (!m) return;
-
- var prev = this.prev();
- var val = m[0];
-
- if (isInside && prev.type === 'brace') {
- prev.text = prev.text || '';
- prev.text += val;
- }
-
- var node = pos(new Node({
- type: 'text',
- multiplier: 1,
- val: val
- }));
-
- return concatNodes.call(this, pos, node, prev, options);
- });
-};
-
-/**
- * Returns true if the character is an extglob character.
- */
-
-function isExtglobChar(ch) {
- return ch === '!' || ch === '@' || ch === '*' || ch === '?' || ch === '+';
-}
-
-/**
- * Combine text nodes, and calculate empty sets (`{,,}`)
- * @param {Function} `pos` Function to calculate node position
- * @param {Object} `node` AST node
- * @return {Object}
- */
-
-function concatNodes(pos, node, parent, options) {
- node.orig = node.val;
- var prev = this.prev();
- var last = utils.last(prev.nodes);
- var isEscaped = false;
-
- if (node.val.length > 1) {
- var a = node.val.charAt(0);
- var b = node.val.slice(-1);
-
- isEscaped = (a === '"' && b === '"')
- || (a === "'" && b === "'")
- || (a === '`' && b === '`');
- }
-
- if (isEscaped && options.unescape !== false) {
- node.val = node.val.slice(1, node.val.length - 1);
- node.escaped = true;
- }
-
- if (node.match) {
- var match = node.match[1];
- if (!match || match.indexOf('}') === -1) {
- match = node.match[0];
- }
-
- // replace each set with a single ","
- var val = match.replace(/\{/g, ',').replace(/\}/g, '');
- node.multiplier *= val.length;
- node.val = '';
- }
-
- var simpleText = last.type === 'text'
- && last.multiplier === 1
- && node.multiplier === 1
- && node.val;
-
- if (simpleText) {
- last.val += node.val;
- return;
- }
-
- prev.push(node);
-}
projects / dotfiles / .git / blobdiff