Clean up the owner plugin (now called 'group').

lib/util/grouputil.js

@@ -0,0 +1,72 @@
+var util = require('util')
+
+var Promise = require('bluebird')
+var semver = require('semver')
+var minimatch = require('minimatch')
+
+var wire = require('../wire')
+
+function RequirementMismatchError(name) {
+  Error.call(this)
+  this.name = 'RequirementMismatchError'
+  this.message = util.format('Requirement mismatch for "%s"', name)
+  Error.captureStackTrace(this, RequirementMismatchError)
+}
+
+util.inherits(RequirementMismatchError, Error)
+
+module.exports.RequirementMismatchError = RequirementMismatchError
+
+function AlreadyGroupedError(name) {
+  Error.call(this)
+  this.name = 'AlreadyGroupedError'
+  this.message = 'Already a member of another group'
+  Error.captureStackTrace(this, AlreadyGroupedError)
+}
+
+util.inherits(AlreadyGroupedError, Error)
+
+module.exports.AlreadyGroupedError = AlreadyGroupedError
+
+function NotGroupedError() {
+  Error.call(this)
+  this.name = 'NotGroupedError'
+  this.message = 'Not a member of any group'
+  Error.captureStackTrace(this, NotGroupedError)
+}
+
+util.inherits(NotGroupedError, Error)
+
+module.exports.NotGroupedError = NotGroupedError
+
+module.exports.match = Promise.method(function(capabilities, requirements) {
+  return requirements.every(function(req) {
+    var capability = capabilities[req.name]
+
+    if (!capability) {
+      throw new RequirementMismatchError(req.name)
+    }
+
+    switch (req.type) {
+      case wire.RequirementType.SEMVER:
+        if (!semver.satisfies(capability, req.value)) {
+          throw new RequirementMismatchError(req.name)
+        }
+        break
+      case wire.RequirementType.GLOB:
+        if (!minimatch(capability, req.value)) {
+          throw new RequirementMismatchError(req.name)
+        }
+        break
+      case wire.RequirementType.EXACT:
+        if (capability !== req.value) {
+          throw new RequirementMismatchError(req.name)
+        }
+        break
+      default:
+        throw new RequirementMismatchError(req.name)
+    }
+
+    return true
+  })
+})