Move matchesRequirements to devutil.

lib/util/devutil.js

@@ -2,12 +2,44 @@ var util = require('util')
 
 var split = require('split')
 var Promise = require('bluebird')
+var semver = require('semver')
+var minimatch = require('minimatch')
 
 var wire = require('../wire')
 var pathutil = require('./pathutil')
 
 var devutil = module.exports = Object.create(null)
 
+devutil.matchesRequirements = function(capabilities, requirements) {
+  return requirements.every(function(req) {
+    var capability = capabilities[req.name]
+
+    if (!capability) {
+      return false
+    }
+
+    switch (req.type) {
+      case wire.RequirementType.SEMVER:
+        if (!semver.satisfies(capability, req.value)) {
+          return false
+        }
+        break
+      case wire.RequirementType.GLOB:
+        if (!minimatch(capability, req.value)) {
+          return false
+        }
+        break
+      case wire.RequirementType.EXACT:
+        if (capability !== req.value) {
+          return false
+        }
+        break
+      default:
+        return false
+    }
+  })
+}
+
 devutil.vendorFiles = function(identity) {
   return {
     bin: {