Add config.vm.box_server_url setting

This commits adds a new config setting `config.vm.box_server_url` to set
the URL of a local VagrantCloud instance in the Vagrantfile. If the
environment variable `VAGRANT_SERVER_URL` is set, it will still be
preferred.

lib/vagrant/action/builtin/box_add.rb

@@ -53,7 +53,7 @@ module Vagrant
             next if url[i] !~ /^[^\/]+\/[^\/]+$/
 
             if !File.file?(url[i])
-              server   = Vagrant.server_url
+              server = Vagrant.server_url env[:box_server_url]
               raise Errors::BoxServerNotSet if !server
 
               expanded = true

lib/vagrant/shared_helpers.rb

@@ -60,9 +60,9 @@ module Vagrant
   # Returns the URL prefix to the server.
   #
   # @return [String]
-  def self.server_url
+  def self.server_url(config_server_url=nil)
     result = ENV["VAGRANT_SERVER_URL"]
-    result = nil if result == ""
+    result = config_server_url if result == "" or result == nil
     result || DEFAULT_SERVER_URL
   end
 

plugins/kernel_v2/config/vm.rb

@@ -19,6 +19,7 @@ module VagrantPlugins
       attr_accessor :box
       attr_accessor :box_check_update
       attr_accessor :box_url
+      attr_accessor :box_server_url
       attr_accessor :box_version
       attr_accessor :box_download_ca_cert
       attr_accessor :box_download_ca_path

test/unit/vagrant/action/builtin/box_add_test.rb

@@ -306,6 +306,53 @@ describe Vagrant::Action::Builtin::BoxAdd do
       end
     end
 
+    it "add from shorthand path with configured server url" do
+      box_path = iso_env.box2_file(:virtualbox)
+      td = Pathname.new(Dir.mktmpdir)
+      tf = td.join("mitchellh", "precise64.json")
+      tf.dirname.mkpath
+      tf.open("w") do |f|
+        f.write(<<-RAW)
+        {
+          "name": "mitchellh/precise64",
+          "versions": [
+            {
+              "version": "0.5"
+            },
+            {
+              "version": "0.7",
+              "providers": [
+                {
+                  "name": "virtualbox",
+                  "url":  "#{box_path}"
+                }
+              ]
+            }
+          ]
+        }
+        RAW
+      end
+
+      with_web_server(tf.dirname) do |port|
+        url = "http://127.0.0.1:#{port}"
+        env[:box_url] = "mitchellh/precise64.json"
+        env[:box_server_url] = url
+
+        expect(box_collection).to receive(:add).with { |path, name, version, **opts|
+          expect(name).to eq("mitchellh/precise64")
+          expect(version).to eq("0.7")
+          expect(checksum(path)).to eq(checksum(box_path))
+          expect(opts[:metadata_url]).to eq(
+            "#{url}/#{env[:box_url]}")
+          true
+        }.and_return(box)
+
+        expect(app).to receive(:call).with(env)
+
+        subject.call(env)
+      end
+    end
+
     it "authenticates HTTP URLs and adds them" do
       box_path = iso_env.box2_file(:virtualbox)
       tf = Tempfile.new(["vagrant", ".json"]).tap do |f|

test/unit/vagrant/shared_helpers_test.rb

@@ -71,6 +71,18 @@ describe Vagrant do
         expect(subject.server_url).to eq("foo")
       end
     end
+
+    it "is the VAGRANT_SERVER_URL value if the server url is configured" do
+      with_temp_env("VAGRANT_SERVER_URL" => "foo") do
+        expect(subject.server_url('bar')).to eq("foo")
+      end
+    end
+
+    it "is the configured server url if VAGRANT_SERVER_URL is not set" do
+      with_temp_env("VAGRANT_SERVER_URL" => nil) do
+        expect(subject.server_url("bar")).to eq("bar")
+      end
+    end
   end
 
   describe "#user_data_path" do