Dear darcs acolytes, Pierre-Étienne Meunier and myself are honoured to present version 0.1 of Pijul. Pijul is a draft of a prototype of an implementation of Samuel Mimram and Cinzia Di Giusto's theory of patches.
Where can I learn more? Where can I find this pijul? ==================================================== Pijul's homepage is http://pijul.org ; its sources are found at "darcs get http://pijul.org";. Both are a bit rough at the moment, but should improve rapidly, maybe with your help… There is a mailing list (pi...@pijul.org), and an irc channel is available on irc.freenode.net, channel #pijul Currently, pijul has a preliminary implementation of darcs' basic commands. What is a pijul, and how do I pronounce it? =========================================== A pijul is a south american bird (Crotophaga sulcirostris), a relative of the cuckoo. In contrast with its parasitic cousin, the pijul lays her eggs in a communal nest, where they are incubated by the whole community. Pijul is thus pronounced as in spanish, IPA [pijul], or aproximately pee-hhOOl (the hh is the sound at the end of scottish 'loch'). What is the Di Giusto-Mimram Patch Theory? ========================================== Pijul's patch theory originates in this paper: http://arxiv.org/abs/1311.3903 . Darcs' patch theory is centered around patches, with two primitive operations, /commutation/ and /inversion/. Compared to this, pijul's theory revolves around files (i.e., states of the working directory at a given point in time) as well as patches, with a /merge/ operation between patches. In contrast with git, this merge operation is well-defined and has all expected properties: in technical terms, it is a /pushout/ in a category where files are the objects, and patches are the arrows. As a consequence of this, to ensure all diverging pairs of patches have a merge, the set of files is extended to contain normal files as well as /files in a conflicted state/. These conflicted files are /rendered/ into the working directory by pijul as files with conflict markings. Thanks to this categorical construction, the Pijul version of most algorithms used in darcs is conceptually simple and efficient. What colour should the bikeshed be? =================================== Blanquiceleste Cheers, Pierre-Étienne Meunier and Florent Becker _______________________________________________ darcs-users mailing list darcs-users@darcs.net http://lists.osuosl.org/mailman/listinfo/darcs-users
