There exist three Darcs repository formats: old-fashioned (OF), hashed and darcs-2. Versions 2.5.x of Darcs are the last one that ensure full support of OF repositories. From version 2.8 (2012) , this support is limited and users are invited to upgrade their OF repositories to hashed.
The commands that can still be run on local OF repositories are:
- optimize –upgrade
The commands that can be run against remote OF repositories are:
Moreover, it is possible to do a remote push to an OF repo, that is, pushing via ssh if the remote machine’s Darcs binary is able to write into OF repositories.
Checkpoints are no longer supported in Darcs 2.8 and later. That is, the
--partial flag for cloning repositories is no longer available.
Run the following command in a repository:
darcs show repo
If you find the line:
then you have an OF repository. If not, it should instead read:
Darcs 2 is required to work with hashed repositories. Hence, the hashed format is always safe on a “client” machine, but if you have other people pulling from your repo, or sending to it, then you have to make sure they have Darcs 2 before going hashed.
See Binaries for instructions on building Darcs and pre-built binaries.
With Darcs 2.4 and later, you can upgrade an existing repository in-place with a single command:
darcs optimize --upgrade
With Darcs older than 2.4, you can use the following steps:
darcs get ./myrepo ./hashedrepo # make a hashed clone cp ./myrepo/_darcs/prefs/* ./hashedrepo/_darcs/prefs/ # copy local settings mv ./myrepo ./oldrepo mv ./hashedrepo ./myrepo
./oldrepo is your OF backup and
./myrepo is the hashed version.
For any question related to upgrading to the hashed format:
- users mailing list
- IRC channel: #darcs on freenode.net