unpublish: check the publishConfig field as same behavior as npm publish

lib/unpublish.js

@@ -7,6 +7,8 @@ var log = require("npmlog")
   , path = require("path")
   , mapToRegistry = require("./utils/map-to-registry.js")
   , npa = require("npm-package-arg")
+  , Conf = require("./config/core.js").Conf
+  , CachingRegClient = require("./cache/caching-client.js")
 
 unpublish.usage = "npm unpublish <project>[@<version>]"
 
@@ -71,34 +73,53 @@ function unpublish (args, cb) {
     return readJson(cwdJson, function (er, data) {
       if (er && er.code !== "ENOENT" && er.code !== "ENOTDIR") return cb(er)
       if (er) return cb("Usage:\n" + unpublish.usage)
-      gotProject(data.name, data.version, cb)
+      gotProject(data.name, data.version, data.publishConfig, cb)
     })
   }
   return gotProject(project, version, cb)
 }
 
-function gotProject (project, version, cb_) {
+function gotProject (project, version, publishConfig, cb_) {
+  if (typeof cb_ !== 'function') {
+    cb_ = publishConfig
+    publishConfig = null
+  }
+
   function cb (er) {
     if (er) return cb_(er)
     console.log("- " + project + (version ? "@" + version : ""))
     cb_()
   }
 
+  var registry = npm.registry
+  var config = npm.config
+
+  if (publishConfig) {
+    config = new Conf(npm.config)
+    config.save = npm.config.save.bind(npm.config)
+
+    config.unshift(Object.keys(publishConfig).reduce(function (s, k) {
+      s[k] = publishConfig[k]
+      return s
+    }, {}))
+    registry = new CachingRegClient(config)
+  }
+
   // remove from the cache first
   npm.commands.cache(["clean", project, version], function (er) {
     if (er) {
       log.error("unpublish", "Failed to clean cache")
       return cb(er)
     }
 
-    mapToRegistry(project, npm.config, function (er, uri, auth) {
+    mapToRegistry(project, config, function (er, uri, auth) {
       if (er) return cb(er)
 
       var params = {
         version : version,
         auth    : auth
       }
-      npm.registry.unpublish(uri, params, cb)
+      registry.unpublish(uri, params, cb)
     })
   })
 }