git filter-branch is a really nice git feature.
For instance, it allows fancy stuff like subtree-splitting.
Problems may arise when the repository contains a lot of commits: this operation can take a lot of time.
Luckily recent versions of git allow us to perform this operation in an incremental way:
the first time
filter-branch still requires some time, but following calls can be very fast.
- git 2.16.0 or newer
- common commands (
- sufficient space in /dev/shm or a different location specified with
--tempdirto run filters
Get the script and read the syntax using the
./bin/incremental-git-filterbranch \ --branch-whitelist 'develop master rx:release\/.*' \ --tag-blacklist 'rx:5\..*' \ --tags-plan all --tags-max-history-lookup 10 \ https://github.com/concrete5/concrete5.git \ '--prune-empty --subdirectory-filter concrete' \ email@example.com:concrete5/concrete5-core.git
Use at your own risk. MIT License.
Special thanks to Ian Campbell for the implementation of the
--state-branch option of git,
and his hints about how it can be used.
This script works only thanks to him (and if it doesn't work I'm the only person to blame).