Updating .bashrc and environment variables during Vagrant provisioning

I'm using Vagrant to set up a box with python, pip, virtualenv, virtualenvwrapper and some requirements. A provisioning shell script adds the required lines for virtualenvwrapper to .bashrc. It does a very basic check that they're not already there, so that it doesn't duplicate them with every provision:

if ! grep -Fq "WORKON_HOME" /home/vagrant/.bashrc; then
    echo 'export WORKON_HOME=/home/vagrant/.virtualenvs' >> /home/vagrant/.bashrc
    echo 'export PROJECT_HOME=/home/vagrant/Devel' >> /home/vagrant/.bashrc
    echo 'source /usr/local/bin/virtualenvwrapper.sh' >> /home/vagrant/.bashrc

    source /home/vagrant/.bashrc
fi

That seems to work fine; after provisioning is finished, the lines are in .bashrc, and I can ssh to the box and use virtualenvwrapper.

However, virtualenvwrapper doesn't work during provisioning. After the section above, this next checks for a pip requirements file and tries to install with virtualenvwrapper:

if [[ -f /vagrant/requirements.txt ]]; then
    mkvirtualenv 'myvirtualenv' -r /vagrant/requirements.txt
fi

But that generates:

==> default: /tmp/vagrant-shell: line 50: mkvirtualenv: command not found

If I try and echo $WORKON_HOME from that shell script, nothing appears.

What am I missing to have those environment variables available, so virtualenvwrapper will run?

UPDATE: Further attempts... it seems that doing source /home/vagrant/.bashrc has no effect in my shell script - I can put echo "hello" in the .bashrc file , and that isn't output during provisioning (but is if I run source /home/vagrant/.bashrc when logged in.

I've also tried su -c "source /home/vagrant/.bashrc" vagrant in the shell script but that is no different.

UPDATE 2: Removed the $BASHRC_PATH variable, which was confusing the issue.

UPDATE 3: In another question I got the answer as to why source /home/vagrant/.bashrc wasn't working: the first part of the .bashrc file prevented it from doing anything when run "not interactively" in that way.

Solution

The Vagrant script provisioner will run as root, so it's home dir (~) will be /root. In your script if you define BASHRC_PATH=/home/vagrant, then I believe your steps will work: appending to, then sourcing from /home/vagrant/.bashrc.

Update:

Scratching my earlier idea ^^ because BASHRC_PATH is already set correctly.

As an alternative we could use .profile or .bash_profile. Here's a simplified example which sets environment variable FOO, making it available during provisioning and after ssh login:

Vagrantfile

Vagrant.configure(2) do |config|
  config.vm.box = "hashicorp/precise32"

  $prov_script = <<SCRIPT
if ! grep -q "export FOO" /home/vagrant/.profile; then
  sudo echo "export FOO=bar" >> /home/vagrant/.profile
  echo "before source, FOO=$FOO"
  source /home/vagrant/.profile
  echo "after source, FOO=$FOO"
fi
SCRIPT

  config.vm.provision "shell", inline: $prov_script
end

Results

$ vagrant up
...
==> default: Running provisioner: shell...
    default: Running: inline script
==> default: before source, FOO=
==> default: after source, FOO=bar
$ vagrant ssh -c 'echo $FOO'
bar
$ vagrant ssh -c 'tail -n 1 ~/.profile'
export FOO=bar