On Wed, 26 Sep 2012 08:33:43 -0700 (PDT)
maxhodges <m...@whiterabbitpress.com> wrote:

> The problem you are probably worried about if when two users make
> changes to the exact same code; that is, when two developers edit the
> same lines of code in the same source file. It's still possible to
> merge the files, but Git will recognize that there is a merge
> conflict and someone will need to review and resolve the conflict. 

A true problem with Git's approach to things (let everyone work away,
and reconcile conflicts later, if any) does not work for stuff which
can't really be merged.  One obvious example of such stuff is binary
files with artwork being a glaring example, for instance, textures or
maps or models in game development.  For cases like these,
lock-edit-unlock reportedly works better.  Git also might perform worse
than other systems, like Subversion, when it comes to huge files --
a property which is, again, common when it comes to binaries.

> Konstantin, I see you wrote ,  "the whole point of 'I am editing this 
> source file at the moment' becomes quite moot.", but is that really
> true?

What I wanted to point out, is that it's not a centralized system where
there's only one reference copy of everything, including branches and
files on them, so one can naturally point to a file on a branch at that
branch's tip revision *as recorded on the central server* and say "OK,
now I'm locking this file".  If everyone has their own repository,
everyone has their very own set of local branches and files on them.

Suppose my enterprise has a reference Git repo for a project (a quite
common setup) so everyone pushes there.  Now I'm fetching from that
repo and update my local branch "master" to be the same as that
reference repo's "master" (so they're in sync).  Now let's suppose the
tip commit on that branch contains a file foo.c, and I'm forking a
local branch "feature" and start modifying foo.c -- does this count
like I "sort of locked" that foo.c on the reference repo's "master"
branch?  What if after some number of commits on my local "feature"
branch I forked a "crazy-idea" branch off "feature" and continued to
fiddle with foo.c on it, -- does this still count as locking foo.c in
the reference repo's "master"?

Hence I thought more about technical difficulties of exactly defining
what to "lock" (even if such a lock would be possible).


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