blt vm writes to bashrc in DrupalVM and leaves it unwritable

[christopher-hopper]

My system information:

• Operating system type: macOS Sierra
• Operating system version: 10.12.5
• BLT version: 8.9.0-rc1

When I run this command:

vendor/bin/blt vm
vagrant ssh
drush init

I get the following output:

Append the above code to /home/vagrant/.bashrc? (y/n): y
file_put_contents(/home/vagrant/.bashrc): failed to open stream: Permission denied init.drush.inc:119                                      [warning]
Updated bash configuration file /home/vagrant/.bashrc                                                                                      [ok]
Start a new shell in order to experience the improvements (e.g. `bash`).                                                                   [ok]

And I expected this to happen:

Append the above code to /home/vagrant/.bashrc? (y/n): y
Updated bash configuration file /home/vagrant/.bashrc                                                                                      [ok]
Start a new shell in order to experience the improvements (e.g. `bash`).                                                                   [ok]

The owner of the ~/.bashrc is being changed, to an unknown user within the VM. I'm assuming its the uid of a user on my Host MacOS machine. This seems to be happening because you're injecting your blt-alias into the top of the ~/.bashrc without asking and leaving the file with an invalid owner:group, but I'm not 100% sure.

When I check the owner:group of ~/.bashrc I see this:

-rw-r--r-- 1 971499904 vagrant_group 4038 Jul  7 02:22 /home/vagrant/.bashrc

What I should see is this:

-rw-r--r-- 1 vagrant vagrant 4465 Jul  7 04:04 /home/vagrant/.bashrc