Re: Splitting a rev list into 2 sets

From: Francis Moreau <francis.moro@gmail.com>
Date: Jun 20, 2013, 13:12 UTC
Message-ID: <CAC9WiBgmswSqDHS3XOubvkY6GhBqrQ3YdwgKR4npqHM-kLJuMA@mail.gmail.com>
In-Reply-To: <CALkWK0=6ZofURGvC-FtS81765yDsA9+0wW94riPZUPudc_nDyw@mail.gmail.com>

On Thu, Jun 20, 2013 at 1:26 PM, Ramkumar Ramachandra <artagnon@gmail.com> wrote:

Show 25 quoted lines

> Francis Moreau wrote:
>> To get the commit set which can't be reached by master (ie commits
>> which are specific to branches other than master) I would do:
>>
>>   # "$@" is the range spec passed to the script
>>   git rev-list "$@" ^master | check_other_commit
>>
>> But I don't know if it's possible to use a different git-rev-list
>> command to get the rest of the commits, ie the ones that are reachable
>> by the specified range and master.
>>
>> One way to do that is to record the first commit set got by the first
>> rev-list command and check that the ones returned by "git rev-list $@"
>> are not in the record.
>
> I don't fully understand your query, because almost anything is
> possible with rev-list:
>
>   $ git rev-list foo..bar master # reachable from master, bar, not foo
>
> What I _suspect_ you're asking is for help when you can't construct
> this "foo..bar master" programmatically (or when you cannot express
> your criterion as arguments to rev-list).  You want an initial commit
> set, and filter it at various points in your program using various
> criteria, right?

Yes, I would like to be sure that I haven't missed some magic syntax for rev-list before going further in my poor man solution :)

Basically I have an initial set (or can be several different sets) expressed as a revision specification described by git-rev-list man page. I just want to find the common set of commit which are part of the initial sets *and* is reachable by master.

I would write it:

     git rev-list "$@" --and master

> In that case, I'd suggest something like this:

Thanks for the details example.

-- Francis