#!/usr/bin/python
import sys

users_map = {
        "max" : {"name":  "Example User",
                 "email": "user@example.com"},
        "..." : "..."
        }



commit_map = {
        "5e5b21bfbb93899bb85241c1ff8cd4e756f28c87": "max",
        "...":                                      "..."
}


if __name__ == "__main__":
    if sys.argv[1] not in commit_map:
        sys.exit(1)
    if sys.argv[2] == "env":
        user = users_map[commit_map[sys.argv[1]]]
        print ('GIT_COMMITTER_NAME="%(name)s";\n'
               'GIT_COMMITTER_EMAIL="%(email)s"\n;'
               'GIT_AUTHOR_NAME="%(name)s";\n'
               'GIT_AUTHOR_EMAIL="%(email)s"\n;') % user

# Then call:
# $ git filter-branch -f --env-filter '
#  if  ~/commit_map.py $GIT_COMMIT test ; then
#    eval $(~/commit_map.py $GIT_COMMIT env)
#  fi
# ' -- --all