[6a3a178] | 1 |
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| 2 | /**
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| 3 | * Module dependencies.
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| 4 | */
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| 5 |
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| 6 | var Visitor = require('./')
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| 7 | , Parser = require('../parser')
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| 8 | , nodes = require('../nodes')
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| 9 | , utils = require('../utils')
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| 10 | , dirname = require('path').dirname
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| 11 | , fs = require('fs');
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| 12 |
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| 13 | /**
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| 14 | * Initialize a new `DepsResolver` with the given `root` Node
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| 15 | * and the `options`.
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| 16 | *
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| 17 | * @param {Node} root
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| 18 | * @param {Object} options
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| 19 | * @api private
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| 20 | */
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| 21 |
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| 22 | var DepsResolver = module.exports = function DepsResolver(root, options) {
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| 23 | this.root = root;
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| 24 | this.filename = options.filename;
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| 25 | this.paths = options.paths || [];
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| 26 | this.paths.push(dirname(options.filename || '.'));
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| 27 | this.options = options;
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| 28 | this.functions = {};
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| 29 | this.deps = [];
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| 30 | };
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| 31 |
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| 32 | /**
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| 33 | * Inherit from `Visitor.prototype`.
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| 34 | */
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| 35 |
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| 36 | DepsResolver.prototype.__proto__ = Visitor.prototype;
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| 37 |
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| 38 | var visit = DepsResolver.prototype.visit;
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| 39 |
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| 40 | DepsResolver.prototype.visit = function(node) {
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| 41 | switch (node.nodeName) {
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| 42 | case 'root':
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| 43 | case 'block':
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| 44 | case 'expression':
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| 45 | this.visitRoot(node);
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| 46 | break;
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| 47 | case 'group':
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| 48 | case 'media':
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| 49 | case 'atblock':
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| 50 | case 'atrule':
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| 51 | case 'keyframes':
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| 52 | case 'each':
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| 53 | case 'supports':
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| 54 | this.visit(node.block);
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| 55 | break;
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| 56 | default:
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| 57 | visit.call(this, node);
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| 58 | }
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| 59 | };
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| 60 |
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| 61 | /**
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| 62 | * Visit Root.
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| 63 | */
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| 64 |
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| 65 | DepsResolver.prototype.visitRoot = function(block) {
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| 66 | for (var i = 0, len = block.nodes.length; i < len; ++i) {
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| 67 | this.visit(block.nodes[i]);
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| 68 | }
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| 69 | };
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| 70 |
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| 71 | /**
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| 72 | * Visit Ident.
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| 73 | */
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| 74 |
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| 75 | DepsResolver.prototype.visitIdent = function(ident) {
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| 76 | this.visit(ident.val);
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| 77 | };
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| 78 |
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| 79 | /**
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| 80 | * Visit If.
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| 81 | */
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| 82 |
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| 83 | DepsResolver.prototype.visitIf = function(node) {
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| 84 | this.visit(node.block);
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| 85 | this.visit(node.cond);
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| 86 | for (var i = 0, len = node.elses.length; i < len; ++i) {
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| 87 | this.visit(node.elses[i]);
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| 88 | }
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| 89 | };
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| 90 |
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| 91 | /**
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| 92 | * Visit Function.
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| 93 | */
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| 94 |
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| 95 | DepsResolver.prototype.visitFunction = function(fn) {
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| 96 | this.functions[fn.name] = fn.block;
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| 97 | };
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| 98 |
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| 99 | /**
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| 100 | * Visit Call.
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| 101 | */
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| 102 |
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| 103 | DepsResolver.prototype.visitCall = function(call) {
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| 104 | if (call.name in this.functions) this.visit(this.functions[call.name]);
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| 105 | if (call.block) this.visit(call.block);
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| 106 | };
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| 107 |
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| 108 | /**
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| 109 | * Visit Import.
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| 110 | */
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| 111 |
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| 112 | DepsResolver.prototype.visitImport = function(node) {
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| 113 | var path = !node.path.first.val.isNull && node.path.first.val || node.path.first.name
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| 114 | , literal, found, oldPath;
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| 115 |
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| 116 | if (!path) return;
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| 117 |
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| 118 | literal = /\.css(?:"|$)/.test(path);
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| 119 |
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| 120 | // support optional .styl
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| 121 | if (!literal && !/\.styl$/i.test(path)) {
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| 122 | oldPath = path;
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| 123 | path += '.styl';
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| 124 | }
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| 125 |
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| 126 | // Lookup
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| 127 | found = utils.find(path, this.paths, this.filename);
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| 128 |
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| 129 | // support optional index
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| 130 | if (!found && oldPath) found = utils.lookupIndex(oldPath, this.paths, this.filename);
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| 131 |
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| 132 | if (!found) return;
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| 133 |
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| 134 | this.deps = this.deps.concat(found);
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| 135 |
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| 136 | if (literal) return;
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| 137 |
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| 138 | // nested imports
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| 139 | for (var i = 0, len = found.length; i < len; ++i) {
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| 140 | var file = found[i]
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| 141 | , dir = dirname(file)
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| 142 | , str = fs.readFileSync(file, 'utf-8')
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| 143 | , block = new nodes.Block
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| 144 | , parser = new Parser(str, utils.merge({ root: block }, this.options));
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| 145 |
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| 146 | if (!~this.paths.indexOf(dir)) this.paths.push(dir);
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| 147 |
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| 148 | try {
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| 149 | block = parser.parse();
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| 150 | } catch (err) {
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| 151 | err.filename = file;
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| 152 | err.lineno = parser.lexer.lineno;
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| 153 | err.column = parser.lexer.column;
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| 154 | err.input = str;
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| 155 | throw err;
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| 156 | }
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| 157 |
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| 158 | this.visit(block);
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| 159 | }
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| 160 | };
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| 161 |
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| 162 | /**
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| 163 | * Get dependencies.
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| 164 | */
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| 165 |
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| 166 | DepsResolver.prototype.resolve = function() {
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| 167 | this.visit(this.root);
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| 168 | return utils.uniq(this.deps);
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| 169 | };
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