Re: which version control supports file locking and who has it locked

Hi Doug,
               So if I remember correctly p4 supports this, when you "p4
edit" a file it will tell you if anyone else has already done "p4 edit" on
the file.

cheers
Mark

On Fri, Jun 10, 2016 at 8:15 PM, Doug Robinson <doug.robinson_at_wandisco.com>
wrote:

> The dichotomy is due to the expression of "knowing who is actually
> working on a file".
>
> I agree that if locking is used then (assuming nobody breaks the lock) you
> know who will checkin next. And, yes, agreed, when they check in is a
> social issue.
>
> However, you really don't know who is working on the file. This may all
> seem meta-physical but I've seen requirements for SCM systems where it
> really was necessary to know exactly who was actually working on the file
> in their sandbox. None of the discussed SCMs here support those semantics.
>
> On Mon, Jun 6, 2016 at 12:17 PM, Andreas Stieger <Andreas.Stieger_at_gmx.de>
> wrote:
>
>> Doug,
>>
>> Doug Robinson wrote:
>> > To be more precise, you can know who, in the past, has made changes to
>> files and
>> > checked those change into the repository. You cannot know who has made
>> changes
>> > in their working copy and has not yet checked them back into the
>> repository (they
>> > may never do so).
>>
>> I am not sure why you would introduce this dichotomy here, it is
>> irrelevant. OP asked for locking support. Subversion supports locking, lock
>> hinting (svn:needs-lock), lock communication/discovery (display of who,
>> when and why). In the cli, hooks and GUI clients. Whether or not actual
>> changes were done in any working copy is irrelevant, and a delay in
>> submission a mere social/project problem.
>>
>> > To know who is actually working on a file requires a level of
>> integration that is not
>> > found in SVN, Git or CVS. I have a vague recollection of an SCM that
>> did enable
>> > such information but I'm not remembering which one it is at the moment.
>>
>> Rather, if the project policy is such that locking is required, it should
>> be implemented accordingly. lock-modify-unlock for the whole project is a
>> supported option, albeit not a commonly used one.
>>
>> Andreas
>>
>
>
>
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