1  'use strict';
 2  
 3  var nanomatch = require('nanomatch');
 4  var extglob = require('extglob');
 5  
 6  module.exports = function(snapdragon) {
 7    var compilers = snapdragon.compiler.compilers;
 8    var opts = snapdragon.options;
 9  
10    // register nanomatch compilers
11    snapdragon.use(nanomatch.compilers);
12  
13    // get references to some specific nanomatch compilers before they
14    // are overridden by the extglob and/or custom compilers
15    var escape = compilers.escape;
16    var qmark = compilers.qmark;
17    var slash = compilers.slash;
18    var star = compilers.star;
19    var text = compilers.text;
20    var plus = compilers.plus;
21    var dot = compilers.dot;
22  
23    // register extglob compilers or escape exglobs if disabled
24    if (opts.extglob === false || opts.noext === true) {
25      snapdragon.compiler.use(escapeExtglobs);
26    } else {
27      snapdragon.use(extglob.compilers);
28    }
29  
30    snapdragon.use(function() {
31      this.options.star = this.options.star || function(/*node*/) {
32        return '[^\\\\/]*?';
33      };
34    });
35  
36    // custom micromatch compilers
37    snapdragon.compiler
38  
39      // reset referenced compiler
40      .set('dot', dot)
41      .set('escape', escape)
42      .set('plus', plus)
43      .set('slash', slash)
44      .set('qmark', qmark)
45      .set('star', star)
46      .set('text', text);
47  };
48  
49  function escapeExtglobs(compiler) {
50    compiler.set('paren', function(node) {
51      var val = '';
52      visit(node, function(tok) {
53        if (tok.val) val += (/^\W/.test(tok.val) ? '\\' : '') + tok.val;
54      });
55      return this.emit(val, node);
56    });
57  
58    /**
59     * Visit `node` with the given `fn`
60     */
61  
62    function visit(node, fn) {
63      return node.nodes ? mapVisit(node.nodes, fn) : fn(node);
64    }
65  
66    /**
67     * Map visit over array of `nodes`.
68     */
69  
70    function mapVisit(nodes, fn) {
71      var len = nodes.length;
72      var idx = -1;
73      while (++idx < len) {
74        visit(nodes[idx], fn);
75      }
76    }
77  }