tetra – builds RPMs for Java software
tetra is a tool to help you build RPM packages for Java projects.
Packaging of Java projects is sometimes hard - mainly because build tools like Maven partially overlap with distro ones like RPM.
See MOTIVATION.md for further information.
- Ruby 1.9.2 or later;
- git with your credentials set in ~/.gitconfig (name and email)
- some basic Unix commands: bash, unzip, tar;
- a JDK that can compile whatever software you need to package;
- Fedora only: packages to compile native gems, use
yum install ruby-devel gcc-c++ zlib-devel;
tetra via RubyGems:
gem install tetra
Building a package with
tetra is quite unusual — this is a deliberate choice, so don't worry. Basic steps are:
tetra init <package name> package_sources.tar.gzto initialize the project and unpack original sources;
cdinto the newly created
- if anything other than
mvnis needed in order to build the project, add it to the
kit/directory in binary form;
tetra dry-run, which will open a bash subshell. Build your project, and when you are done conclude by exiting the subshell with
cdinto the directory that contains
tetra generate-all: tetra will scaffold spec files and tarballs.
How can that possibly work?
During the dry-run
- saves your bash history, so that it can use it later to scaffold a build script;
- keeps track of changed files, in particular produced jars, which are included in the spec's
- saves files downloaded from the Internet (eg. by Maven) and packs them to later allow networkless builds.
Note that with
tetra you are not building all dependencies from source - build dependencies are aggregated in a binary-only "kit" package. This is typically sufficient to fulfill open source licenses and to have a repeatable, networkless build.
A commons-collections walkthrough
First, grab the sources:
Second, ceate a new
tetra project named
commons-collections based on those sources:
tetra init commons-collections commons-collections4-4.0-src.tar.gz cd commons-collections/src/commons-collections4-4.0-src
Third, you need to show
tetra how to build your package. Run
tetra dry-run and a new subshell will open, in there do anything you would normally do to build the package (in this case, run Maven):
tetra dry-run mvn package ^D
Note that you don't even need to install Maven -
tetra bundles a copy in
kit/ and uses it by default!
Also note that this being a dry-run build, sources will be brought back to their original state after it finishes to ensure repeatability.
Finally, generate build scripts, spec files and tarballs in the
tetra will generate files for the commons-collections package and all binary-only build-time dependencies in the
In more complex cases building a package will require some special tweaks. We are trying to cover the most common in the SPECIAL_CASES.md file.
An in-depth discussion of this project's motivation is available in the MOTIVATION.md file.
tetra is considered stable. At the moment
tetra is tested on openSUSE and Ubuntu.
tetra's Git repo is available on GitHub, which can be browsed at:
and cloned with:
git clone firstname.lastname@example.org:SilvioMoioli/tetra.git
Are you using
tetra or even just reading this? Let's get in touch!
moio at suse dot de