Blame view

node_modules/stylus-loader/lib/resolver.js 3.07 KB
ce4c83ff   wxy   初始提交
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
  // This implementation of the url resolver adds awareness for webpack loaders
  /*
  
  Modified from the stylus implementation:
  
  (The MIT License)
  
  Copyright (c) 20102014 LearnBoost <dev@learnboost.com>
  
  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  'Software'), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:
  
  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
  
  /*jshint laxcomma:true */
  var Stylus = require('stylus')
      , Compiler = Stylus.Compiler
      , nodes = Stylus.nodes
      , utils = Stylus.utils
    , parse = require('url').parse
    , relative = require('path').relative
    , dirname = require('path').dirname
    , extname = require('path').extname
    , sep = require('path').sep;
  
  /**
   * Return a url() function with the given `options`.
   *
   * Options:
   *
   *    - `paths` resolution path(s), merged with general lookup paths
   *
   * Examples:
   *
   *    stylus(str)
   *      .set('filename', __dirname + '/css/test.styl')
   *      .define('url', stylus.resolver({ paths: [__dirname + '/public'] }))
   *      .render(function(err, css){ ... })
   *
   * @param {Object} options
   * @return {Function}
   * @api public
   */
  
  module.exports = function(options) {
    options = options || {};
  
    var _paths = options.paths || [];
  
    function url(url) {
      var paths = _paths.concat(this.paths),
          filename = this.filename;
  
      // Compile the url
      var compiler = new Compiler(url);
      compiler.isURL = true;
      url = url.nodes.map(function(node){
        return compiler.visit(node);
      }).join('');
  
      function resolveComponent(url) {
        if (!url) {
          return url;
        }
  
        url = parse(url);
        if (url.protocol) {
          return url.href;
        }
  
        // Lookup
        var found = utils.lookup(url.pathname, paths, '', true);
        if (!found) {
          return url.href;
        }
  
        var tail = '';
        if (url.search) {
          tail += url.search;
        }
        if (url.hash) {
          tail += url.hash;
        }
  
        var res = relative(dirname(filename), found) + tail;
        if ('\\' == sep) res = res.replace(/\\/g, '/');
        return res;
      }
  
      var components = url.split(/!/g);
      components = components.map(resolveComponent);
      return new nodes.Literal('url("' + components.join('!') + '")');
    }
  
    url.raw = true;
    return url;
  };