startup.sh-pre-template

#!/bin/bash
# Username: Administrator, vagrant
# Password: vagrant

set -eou pipefail

# Do some necessary preparation of the environment.
chown root:kvm /dev/kvm
/usr/sbin/libvirtd --daemon
/usr/sbin/virtlogd --daemon
cd /vagrant

# Define teh vagrant image thst will be set up in the final build.
vagrant init "<<PUT_IMAGE_NAME_HERE>>"

# Prepare Vagrantfile with ENVironment variables passed from docker.

# In case this container has been run previously, and there is a Vagrantfile in the /vagrant folder, then we should
#  support th euser by passing environment variables into it to set the CPU/RAM/DISK requested by the user by way of
#  the ENVironment variables passed from docker.
#  We probably don tneed this for the -pre iamge, but what the heck.
if test -f Vagrantfile.orig; then
  mv Vagrantfile.orig Vagrantfile
fi
if test -f Vagrantfile; then
  awk -v line=$(awk '/end/{x=NR}END{print x}' Vagrantfile) 'NR==FNR{a[NR]=$0;next}{if(FNR==line){for(i=1;i<=NR;i++)print a[i]}print}' text_to_insert.txt Vagrantfile | awk 'NF' > Vagrantfile.out
  mv Vagrantfile.out Vagrantfile
  envsubst '$CPU,$MEMORY,$DISK_SIZE' < Vagrantfile > Vagrantfile.tmp
  mv Vagrantfile Vagrantfile.orig
  mv Vagrantfile.tmp Vagrantfile
#  vagrant destroy -f
  vagrant up
fi

exec "$@"