From 15871a481bdca3008471deca582f79c5a5fe7578 Mon Sep 17 00:00:00 2001
From: Fernando Seror <ferdy89@gmail.com>
Date: Sun, 8 Jan 2017 20:21:52 -0500
Subject: [PATCH] Warn about changes to CWD on every machine action

Whenever the path where the machine was first created changes, Vagrant
will now show just one warning when an action is run on the machine.

The idea is that if a user copies the machine over to a different
directory with the idea of running two different machines, this warning
will now help the user determine how to make that work.
---
 lib/vagrant/machine.rb   | 22 ++++++++++++++++++++++
 templates/locales/en.yml |  4 ++++
 2 files changed, 26 insertions(+)

diff --git a/lib/vagrant/machine.rb b/lib/vagrant/machine.rb
index e7107fb62..a3b13373e 100644
--- a/lib/vagrant/machine.rb
+++ b/lib/vagrant/machine.rb
@@ -170,6 +170,8 @@ module Vagrant
       # Extra env keys are the remaining opts
       extra_env = opts.dup
 
+      check_cwd
+
       # Create a deterministic ID for this machine
       vf = nil
       vf = @env.vagrantfile_name[0] if @env.vagrantfile_name
@@ -559,5 +561,25 @@ module Vagrant
       return nil if !@data_dir
       @data_dir.join("creator_uid")
     end
+
+    def check_cwd
+      vagrant_cwd_filepath = @data_dir.join('vagrant_cwd')
+      vagrant_cwd = if File.exist?(vagrant_cwd_filepath)
+        File.read(vagrant_cwd_filepath).chomp
+      end
+
+      if vagrant_cwd
+        if vagrant_cwd != @env.cwd.to_s
+          ui.warn(I18n.t(
+            'vagrant.moved_cwd',
+            old_wd:     vagrant_cwd,
+            current_wd: @env.cwd.to_s))
+
+          File.write(vagrant_cwd_filepath, @env.cwd)
+        end
+      else
+        File.write(vagrant_cwd_filepath, @env.cwd)
+      end
+    end
   end
 end
diff --git a/templates/locales/en.yml b/templates/locales/en.yml
index 5e36d67a4..2e6a6f5e9 100644
--- a/templates/locales/en.yml
+++ b/templates/locales/en.yml
@@ -165,6 +165,10 @@ en:
       description of what they do.
 
       %{list}
+    moved_cwd: |-
+      This machine used to live in %{old_wd} but it's now at %{current_wd}.
+      Please change the name of the machine if you want to run it as a different
+      machine.
     guest_deb_installing_smb: |-
       Installing SMB "mount.cifs"...
     global_status_footer: |-