Isn't Travis already running on Docker? So.. this is Docker within Docker? Is there a reason you wouldn't just use different docker images at the Travis level for this?
Travis CI allow you to run any particular command, including Docker, on the top of their Ubuntu Precise/Trusty images. There is no way to choose other images from docker hub in the .travis.yml.
Actually, PackPack is not just for Travis, it can be also used locally:
~/gitrepo$ OS=fedora DIST=24 packpack # Build for Fedora 24
~/gitrepo$ OS=centos DIST=7 packpack # Build for CentOS 7
~/gitrepo$ OS=debian DIST=stretch packpack # Build for Debian Stretch
~/gitrepo$ OS=ubuntu DIST=xenial packpack # Build for Ubuntu Xenial
PackPack automatically bumps version in the RPM spec, packs a source tarball, creates a source RPM and then builds binary packages. You only need a proper RPM spec at `rpm/` and `major.minor` annotated git tag.
Actually, PackPack is not just for Travis, it can be also used locally:
PackPack automatically bumps version in the RPM spec, packs a source tarball, creates a source RPM and then builds binary packages. You only need a proper RPM spec at `rpm/` and `major.minor` annotated git tag.