Improve Windows drive letter removal hack

plugins/provisioners/chef/provisioner/chef_solo.rb

@@ -5,6 +5,7 @@ require "set"
 require "log4r"
 
 require "vagrant/util/counter"
+require "vagrant/action/builtin/mixin_synced_folders"
 
 require_relative "base"
 
@@ -95,13 +96,12 @@ module VagrantPlugins
             else
               # Path already exists on the virtual machine. Expand it
               # relative to where we're provisioning.
-              remote_path = File.expand_path(path, guest_provisioning_path)
 
               # Remove drive letter if running on a windows host. This is a bit
               # of a hack but is the most portable way I can think of at the moment
               # to achieve this. Otherwise, Vagrant attempts to share at some crazy
               # path like /home/vagrant/c:/foo/bar
-              remote_path = remote_path.gsub(/^[a-zA-Z]:/, "")
+              remote_path = File.expand_path(path.gsub(/^[a-zA-Z]:\//, "/"), guest_provisioning_path.gsub(/^[a-zA-Z]:\//, "/"))
             end
 
             # If we have specified a folder name to append then append it

test/unit/plugins/provisioners/chef/provisioner/chef_solo_test.rb

@@ -0,0 +1,75 @@
+require_relative "../../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/chef/provisioner/chef_solo")
+
+describe VagrantPlugins::Chef::Provisioner::ChefSolo do
+  include_context "unit"
+
+  let(:iso_env) do
+    # We have to create a Vagrantfile so there is a root path
+    env = isolated_environment
+    env.vagrantfile("")
+    env.create_vagrant_env
+  end
+
+  let(:machine) { iso_env.machine(iso_env.machine_names[0], :dummy) }
+  let(:config)  { double("config") }
+
+  subject { described_class.new(machine, config) }
+
+  before do
+    allow(config).to receive(:node_name)
+    allow(config).to receive(:node_name=)
+  end
+
+  describe "#expanded_folders" do
+    it "handles the default Windows provisioning path" do
+      allow(config).to receive(:provisioning_path).and_return(nil)
+      allow(subject).to receive(:windows?).and_return(true)
+      remote_path = subject.expanded_folders([[:vm, "cookbooks-1"]])[0][2]
+      expect(remote_path).to eq("/vagrant-chef/cookbooks-1")
+    end
+  end
+
+  describe "#expanded_folders" do
+    it "expands Windows absolute provisioning path with relative path" do
+      provisioning_path = "C:/vagrant-chef-1"
+      unexpanded_path = "cookbooks-1"
+
+      allow(config).to receive(:provisioning_path).and_return(provisioning_path)
+      remote_path = subject.expanded_folders([[:vm, unexpanded_path]])[0][2]
+
+      expect(remote_path).to eq("/vagrant-chef-1/cookbooks-1")
+    end
+
+    it "expands Windows absolute provisioning path with absolute path" do
+      provisioning_path = "C:/vagrant-chef-1"
+      unexpanded_path = "/cookbooks-1"
+
+      allow(config).to receive(:provisioning_path).and_return(provisioning_path)
+      remote_path = subject.expanded_folders([[:vm, unexpanded_path]])[0][2]
+
+      expect(remote_path).to eq("/cookbooks-1")
+    end
+
+    it "expands Windows absolute provisioning path with Windows absolute path" do
+      provisioning_path = "C:/vagrant-chef-1"
+      unexpanded_path = "D:/cookbooks-1"
+
+      allow(config).to receive(:provisioning_path).and_return(provisioning_path)
+      remote_path = subject.expanded_folders([[:vm, unexpanded_path]])[0][2]
+
+      expect(remote_path).to eq("/cookbooks-1")
+    end
+
+    it "expands absolute provisioning path with Windows absolute path" do
+      provisioning_path = "/vagrant-chef-1"
+      unexpanded_path = "D:/cookbooks-1"
+
+      allow(config).to receive(:provisioning_path).and_return(provisioning_path)
+      remote_path = subject.expanded_folders([[:vm, unexpanded_path]])[0][2]
+
+      expect(remote_path).to eq("/cookbooks-1")
+    end
+  end
+end