commit 4b8b2394feba8cafabf8b6d8f2d0e7327d034744
author Joel Stanley <joel@jms.id.au> Fri Feb 12 15:44:57 2016 +1030
committer Joel Stanley <joel@jms.id.au> Mon Feb 15 13:24:19 2016 +1030
tree f755f5b5b0323c3e59585d3460720c93ad19bcc3
parent 01d1b3861808774c36b347fe68a83f82032cafa7

build-setup: Ensure we fail the build when a step fails

Currently the build step can fail inside docker but we don't propogate
that error up, so the Jenkins build will not be marked as failed.

We set the following options:

 set -xeuo pipefail

 - bash trace output (-x)
 - failing when a step fails (-e)
 - failing on undefined variables (-u)
 - failing when a command in a pipe fails (-o pipefail) - the default
 behaviour is to use the exit code of the final command in the pipe.

http://redsymbol.net/articles/unofficial-bash-strict-mode/

Thanks to Daniel Axtens <dja@axtens.net> for the extra suggestions.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Daniel Axtens <dja@axtens.net>