Split single top-level status check into one plan and one apply check.
These checks will also now track the whole pull request status rather
than just the last action.
Features:
- remote plans and applies will set a commit status with a link to the
Terraform Enterpise UI where the streaming output can be viewed.
- because remote plans don't support the -out flag, we diff the plan
output between plan and apply phases to ensure users are applying the
plan they expected
How:
We add a new capability to execute a terraform command while
concurrently reading its real-time output and performing actions
accordingly.
This is needed so we can set different commit statuses for plan and
apply phases.
Also, append os env variables to git commands during cloning. This fixed
a bug when running tests where I got an error because git couldn't expand
'~' from its git config to my home directory because the HOME env var
wasn't set.
Add Apache 2 license and Hootsuite copyright to all golang
files. Add a disclaimer that the files have been modified
hereafter by contributors to this repo in order to abide
by the Apache 2 license requirements.
