340 lines
8.3 KiB
JavaScript
340 lines
8.3 KiB
JavaScript
'use strict';
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/**
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* Nanomatch compilers
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*/
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module.exports = function(nanomatch, options) {
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function slash() {
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if (options && typeof options.slash === 'string') {
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return options.slash;
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}
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if (options && typeof options.slash === 'function') {
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return options.slash.call(nanomatch);
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}
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return '\\\\/';
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}
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function star() {
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if (options && typeof options.star === 'string') {
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return options.star;
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}
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if (options && typeof options.star === 'function') {
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return options.star.call(nanomatch);
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}
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return '[^' + slash() + ']*?';
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}
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var ast = nanomatch.ast = nanomatch.parser.ast;
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ast.state = nanomatch.parser.state;
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nanomatch.compiler.state = ast.state;
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nanomatch.compiler
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/**
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* Negation / escaping
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*/
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.set('not', function(node) {
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var prev = this.prev();
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if (this.options.nonegate === true || prev.type !== 'bos') {
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return this.emit('\\' + node.val, node);
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}
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return this.emit(node.val, node);
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})
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.set('escape', function(node) {
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if (this.options.unescape && /^[-\w_.]/.test(node.val)) {
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return this.emit(node.val, node);
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}
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return this.emit('\\' + node.val, node);
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})
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.set('quoted', function(node) {
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return this.emit(node.val, node);
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})
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/**
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* Regex
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*/
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.set('dollar', function(node) {
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if (node.parent.type === 'bracket') {
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return this.emit(node.val, node);
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}
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return this.emit('\\' + node.val, node);
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})
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/**
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* Dot: "."
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*/
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.set('dot', function(node) {
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if (node.dotfiles === true) this.dotfiles = true;
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return this.emit('\\' + node.val, node);
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})
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/**
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* Slashes: "/" and "\"
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*/
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.set('backslash', function(node) {
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return this.emit(node.val, node);
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})
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.set('slash', function(node, nodes, i) {
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var val = '[' + slash() + ']';
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var parent = node.parent;
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var prev = this.prev();
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// set "node.hasSlash" to true on all ancestor parens nodes
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while (parent.type === 'paren' && !parent.hasSlash) {
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parent.hasSlash = true;
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parent = parent.parent;
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}
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if (prev.addQmark) {
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val += '?';
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}
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// word boundary
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if (node.rest.slice(0, 2) === '\\b') {
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return this.emit(val, node);
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}
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// globstars
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if (node.parsed === '**' || node.parsed === './**') {
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this.output = '(?:' + this.output;
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return this.emit(val + ')?', node);
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}
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// negation
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if (node.parsed === '!**' && this.options.nonegate !== true) {
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return this.emit(val + '?\\b', node);
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}
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return this.emit(val, node);
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})
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/**
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* Square brackets
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*/
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.set('bracket', function(node) {
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var close = node.close;
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var open = !node.escaped ? '[' : '\\[';
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var negated = node.negated;
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var inner = node.inner;
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var val = node.val;
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if (node.escaped === true) {
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inner = inner.replace(/\\?(\W)/g, '\\$1');
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negated = '';
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}
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if (inner === ']-') {
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inner = '\\]\\-';
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}
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if (negated && inner.indexOf('.') === -1) {
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inner += '.';
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}
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if (negated && inner.indexOf('/') === -1) {
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inner += '/';
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}
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val = open + negated + inner + close;
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return this.emit(val, node);
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})
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/**
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* Square: "[.]" (only matches a single character in brackets)
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*/
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.set('square', function(node) {
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var val = (/^\W/.test(node.val) ? '\\' : '') + node.val;
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return this.emit(val, node);
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})
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/**
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* Question mark: "?"
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*/
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.set('qmark', function(node) {
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var prev = this.prev();
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// don't use "slash" variable so that we always avoid
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// matching backslashes and slashes with a qmark
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var val = '[^.\\\\/]';
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if (this.options.dot || (prev.type !== 'bos' && prev.type !== 'slash')) {
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val = '[^\\\\/]';
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}
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if (node.parsed.slice(-1) === '(') {
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var ch = node.rest.charAt(0);
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if (ch === '!' || ch === '=' || ch === ':') {
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return this.emit(node.val, node);
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}
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}
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if (node.val.length > 1) {
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val += '{' + node.val.length + '}';
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}
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return this.emit(val, node);
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})
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/**
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* Plus
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*/
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.set('plus', function(node) {
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var prev = node.parsed.slice(-1);
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if (prev === ']' || prev === ')') {
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return this.emit(node.val, node);
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}
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if (!this.output || (/[?*+]/.test(ch) && node.parent.type !== 'bracket')) {
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return this.emit('\\+', node);
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}
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var ch = this.output.slice(-1);
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if (/\w/.test(ch) && !node.inside) {
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return this.emit('+\\+?', node);
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}
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return this.emit('+', node);
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})
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/**
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* globstar: '**'
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*/
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.set('globstar', function(node, nodes, i) {
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if (!this.output) {
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this.state.leadingGlobstar = true;
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}
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var prev = this.prev();
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var before = this.prev(2);
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var next = this.next();
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var after = this.next(2);
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var type = prev.type;
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var val = node.val;
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if (prev.type === 'slash' && next.type === 'slash') {
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if (before.type === 'text') {
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this.output += '?';
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if (after.type !== 'text') {
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this.output += '\\b';
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}
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}
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}
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var parsed = node.parsed;
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if (parsed.charAt(0) === '!') {
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parsed = parsed.slice(1);
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}
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var isInside = node.isInside.paren || node.isInside.brace;
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if (parsed && type !== 'slash' && type !== 'bos' && !isInside) {
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val = star();
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} else {
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val = this.options.dot !== true
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? '(?:(?!(?:[' + slash() + ']|^)\\.).)*?'
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: '(?:(?!(?:[' + slash() + ']|^)(?:\\.{1,2})($|[' + slash() + ']))(?!\\.{2}).)*?';
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}
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if ((type === 'slash' || type === 'bos') && this.options.dot !== true) {
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val = '(?!\\.)' + val;
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}
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if (prev.type === 'slash' && next.type === 'slash' && before.type !== 'text') {
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if (after.type === 'text' || after.type === 'star') {
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node.addQmark = true;
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}
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}
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if (this.options.capture) {
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val = '(' + val + ')';
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}
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return this.emit(val, node);
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})
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/**
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* Star: "*"
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*/
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.set('star', function(node, nodes, i) {
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var prior = nodes[i - 2] || {};
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var prev = this.prev();
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var next = this.next();
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var type = prev.type;
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function isStart(n) {
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return n.type === 'bos' || n.type === 'slash';
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}
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if (this.output === '' && this.options.contains !== true) {
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this.output = '(?![' + slash() + '])';
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}
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if (type === 'bracket' && this.options.bash === false) {
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var str = next && next.type === 'bracket' ? star() : '*?';
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if (!prev.nodes || prev.nodes[1].type !== 'posix') {
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return this.emit(str, node);
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}
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}
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var prefix = !this.dotfiles && type !== 'text' && type !== 'escape'
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? (this.options.dot ? '(?!(?:^|[' + slash() + '])\\.{1,2}(?:$|[' + slash() + ']))' : '(?!\\.)')
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: '';
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if (isStart(prev) || (isStart(prior) && type === 'not')) {
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if (prefix !== '(?!\\.)') {
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prefix += '(?!(\\.{2}|\\.[' + slash() + ']))(?=.)';
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} else {
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prefix += '(?=.)';
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}
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} else if (prefix === '(?!\\.)') {
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prefix = '';
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}
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if (prev.type === 'not' && prior.type === 'bos' && this.options.dot === true) {
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this.output = '(?!\\.)' + this.output;
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}
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var output = prefix + star();
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if (this.options.capture) {
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output = '(' + output + ')';
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}
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return this.emit(output, node);
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})
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/**
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* Text
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*/
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.set('text', function(node) {
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return this.emit(node.val, node);
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})
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/**
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* End-of-string
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*/
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.set('eos', function(node) {
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var prev = this.prev();
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var val = node.val;
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this.output = '(?:\\.[' + slash() + '](?=.))?' + this.output;
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if (this.state.metachar && prev.type !== 'qmark' && prev.type !== 'slash') {
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val += (this.options.contains ? '[' + slash() + ']?' : '(?:[' + slash() + ']|$)');
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}
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return this.emit(val, node);
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});
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/**
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* Allow custom compilers to be passed on options
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*/
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if (options && typeof options.compilers === 'function') {
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options.compilers(nanomatch.compiler);
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}
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};
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