Files in this directory named *.patch or *.diff will be applied to the source tree before building Juju for release. The expectation is that these should be changes that will be accepted upstream, but that we need to apply sooner.

They're applied with $GOPATH/src as the current directory, and with -p1 to strip one component off the start of the file path.

For more details, see lp:juju-release-tools/apply_patches.py or ask babbageclunk or mgz in IRC.