On Wednesday, 7 January 2015 17:20:08 UTC-5, Magnus Therning wrote:
> On Wed, Jan 07, 2015 at 12:40:35PM -0800, Stephen Morton wrote: 
> > My team is planning a transition to git. We're a big division in a 
> > corporate environment. I'm "the tools guy"; I guess the latest 
> > trendy term is DevOps. 
> > 
> > Our current workflow involves the equivalent of using cherry-pick to 
> > move approved bugfixes into the customer release branches. (1) We 
> > intend to maintain this workflow with git for the conceivable 
> > future. 
> > 
> > I can rewrite our existing cherry-picking scripts for use with git 
> > and that is *mostly *no problem, I think, except for one thing: 
> > merges. If a dev doesn't use fetch --rebase, there could at some 
> > point be a non-trivial merge as part of their series of commits. 
> > Merges, from what I understand, present a problem for cherry-pick. I 
> > can see two solutions at the moment. 
> > 
> >    1. Don't allow any merges in the branch to be cherry-picked from. 
> >       (This is a bugfixes-only branch, no massive feature work.) 
> >       We'll likely use some wrappers around git commands, to make 
> >       'fetch --rebase' happen automagically for devs. If a dev tries 
> >       to push a merge, block it and get them to do an interactive 
> >       rebase until the merge is removed. This might sound crazy, but 
> >       coming from a non-DVCS background it would not be a very 
> >       different from our old workflow. 
> >    2. Cherry-pick the merge by introducing what seems to me to be 
> >       likely hellishly complicated and error-prone code into the 
> >       cherry-picking script to try to determine the correct merge 
> >       parent to use when cherry-picking the merge. 
> > 
> > Obviously, I prefer #1 and include #2 only for completeness. But I 
> > don't really like #1 either. 
> > 
> > Does anybody have any thoughts on this? Preferences to these 
> > solutions, better versions of these solutions, additional different 
> > solutions, other ways of thinking about the problem? 
> > 
> > (While I'm mostly looking for "this is how you do it" comments, I 
> > welcome *constructive* "you should do it a different way" comments. 
> > But ones where you just say I'm crazy and doing it all wrong without 
> > knowing anything about the size of my team, our corporate culture, 
> > the number of customer release branches we have to support, the 
> > penalties we are liable for if bugs are introduced in the field, 
> > etc, are frankly not helpful at all.  Honestly, save your breath. 
> > :-) 
> I know you write you intend to maintain the current workflow for the 
> foreseeable future, but have you considered turning around the 
> direction of merges?  That is, make the change on the "customer 
> release branch" and then merge into the development branch?  (A better 
> description can be found in the first half of 
> <http://stackoverflow.com/a/2558501/34996>.) 
> /M 
That is a good point, and is actually what we do. I was trying to provide a 
simplified description of what we do. We have a sort of "continuous 
integration ++" system. So devs commit to the pre-customer branch and it 
undergoes normal continuous automated integration testing on the way there. 
But before it is ready to be shipped in a customer load it must undergo 
some degree of targeted testing that only a human can define or gate. and 
that will take an unknown amount of time for all sorts of reasons -- from 
hours to months. It is only after this point that it is cherry-picked into 
the final customer branch.


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