On 09/30/2009 02:49 AM, Leo Razoumov wrote:
On 2009-09-29, Jakub Narebski<jnareb@xxxxxxxxx> wrote:On Tue, 29 Sep 2009, Leo Razoumov wrote: > On 2009-09-28, Jakub Narebski<jnareb@xxxxxxxxx> wrote: > > [..snip..] > > Besides with nonlinear history with > > revision numbers such as 12678 and 12687 you know that 12678 is older > > than 12687 if and only if 12678 and 12687 are on the same line of > > development. > > The statement above is incorrect!! In a Mercurial repo local revision > numbers are strictly ordered in commit time. 12678< 12687 means that > 12678 was committed prior to 12687. But these two commits could belong > to two completely unrelated lines of development. This is impossible with distributed development. If the second branch comes from other repository, with commits _created_ (in that repository) earlier than commits in current repository, but commits in first branch (from current repository) were created earlier than _fetching_ those commits in second branch: .---.---.---.---x---1---2---3---M---. \ / \-A---B---C-/<-- from repository B Either you would have to change commits numbers, and therefore they would be not stable, or you would have to change commit time to mean 'time this commit got into current repository', which would kill performance for sure.Jakub, in Mercurial sequential commit numbers are local to a repo and are not unique between the clones. Unique ID is SHA1 as in git. So mercurial commit 127:aaf123453dfgdfgddd... means commit number 127 in this repo with SHA1 "aaf123453dfgdfgddd..." In another clone commit 127 might mean completely different thing. Sequential commit numbers are strictly for "local convenience".
Personally I much prefer the "commit'ish-backward" notation of git, where HEAD~4 means "the commit 4 commits back from HEAD". You'd get awfully tired of writing the six-digit "shorthand" numbers of large projects fairly quickly, I imagine. -- Andreas Ericsson andreas.ericsson@xxxxxx OP5 AB www.op5.se Tel: +46 8-230225 Fax: +46 8-230231 Considering the successes of the wars on alcohol, poverty, drugs and terror, I think we should give some serious thought to declaring war on peace. -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html