Add the branch name as an env var to use in build script

[github]

Add the branch name as an env var to use in build script

[jspahrsummers]

👍

[robert-stuttaford]

@github yo. Quite keen to know the answer to this. Without it, we're pretty much going to have to switch Janky off :-(

Would a Githubber in the know spend 2 mins describing how you deal with this, super-pretty-please-with-unit-tests? We want to know so that we know which env the build should go to: - develop? -> staging, master? -> production.

[rsanheim]

@robert-stuttaford: Good pull requests for this welcome :)

[robert-stuttaford]

Why does Janky allow you to specify a branch when you tell it to build, if you can't access that information from the script/cibuild script?

Asked another way, why does Janky support specifying a branch if not to do something with that branch specifically in the build?

Or do I completely misunderstand how this works?

[jspahrsummers]

JANKY_BRANCH added with pull request #100.

[robert-stuttaford]

@jspahrsummers Thank you very much! This is great.