Leiningen is the most active open-source Clojure project. We welcome potential contributors and do our best to try to make it easy to help out. Contributors who have had a single patch accepted may request commit rights as well as a free sticker.
Discussion occurs both in the
#leiningen channel on Freenode
and on the mailing list. To
join the mailing list, simply email
first message to that address will subscribe you without being posted.
Please report issues on the GitHub issue tracker or the mailing list. Personal email addresses are inappropriate for bug reports. Simpler issues appropriate for first-time contributors looking to help out are tagged "newbie".
Patches are preferred as patches from
git format-patch on the
mailing list or as GitHub pull requests. Please use topic branches
when sending pull requests rather than committing directly to master
in order to minimize unnecessary merge commit clutter.
The definitions of the various tasks reside in
src/leiningen in the
top-level project. The underlying mechanisms for things like
project.clj parsing, classpath calculation, and subprocess launching
are implemented inside the
readme for the leiningen-core library
doc/PLUGINS.md for more details on how Leiningen's codebase is
While there is a test suite, it's not terribly thorough, so don't put too much trust in it. Patches which add test coverage for the functionality they change are especially welcome.
You don't need to "build" Leiningen per se, but when you're using a checkout you will need to get its dependencies in place.
Use Leiningen 1.x to run
lein1 install in the
directory. If you don't have 1.x installed, simply check out the
branch and copy
lein1 somewhere on your
switch your branch back. Alternately you can run
dependency:copy-dependencies in the same directory followed by
Once you've done that, symlink
bin/lein to somewhere on your
$PATH. Usually you'll want to rename your existing installation to
keep them from interfering.
When the dependencies change you may have to do
in the project root, though in most cases this can be done automatically.
bin/lein alone from the master branch without a full checkout
is not supported. If you want to just grab a shell script to work
with, use the