Splitting a rev list into 2 sets

Hello,

I'd like to write a script that would parse commits in one of my repo. Ideally this script should accept any revision ranges that git-rev-list would accept.

This script should consider commits in master differently than the ones in others branches.

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.

But I'm wondering if someone can see another solution more elegant ?

Thanks -- Francis