On 09.04.2013, at 16:11, Matthias Felleisen <matth...@ccs.neu.edu> wrote:
> > On Apr 8, 2013, at 6:03 PM, Berthold Bäuml <berthold.bae...@dlr.de> wrote: > >> Another interesting model for package management (even including, e.g., how >> to check out and commit packages during development) has emerged over the >> last years in our field of research with the open source ROS (robot >> operating system) from Willow Garage http://www.ros.org/wiki/Packages . >> >> Currently we are in the middle of writing up a package model we distilled >> from insights we got from studying the planet, planet2, debian and ROS >> packaging system. Looking forward to discussions with you. > > > Please do share your insights with the dev or user list. It is quickly > becoming clear that we will need more than planet2. The question I will pose > is whether planet2 can serve as a foundation for implementing whatever you > come up with -- Matthias I hope to find time to write up the model this weekend. But what is absolutely clear to us is that a package management system has to have a notion of versions (or variants as I called them) for a package at the lowest level -- otherwise such simple things as roll-backs or composing a system from packages in a deterministic way (i.e., by precisely specifying a version for all packages) is not possible. Of course, on top of such a low level system one can add more convenient interfaces for users for the more standard use cases, e.g., mimicking the version disregarding behavior of planet2 -- but it is not possible to do it the other way round. Berthold -- ----------------------------------------------------------------------- Berthold Bäuml -- Head of Autonomous Learning Robots Lab DLR, Robotics and Mechatronics Center (RMC) Münchner Str. 20, D-82234 Wessling Phone +49 8153 282489 http://www.robotic.de/Berthold.Baeuml ____________________ Racket Users list: http://lists.racket-lang.org/users
