git-svn: How to prevent "dcommit", "rebase" when not on master

Question

I am using git-svn.

My problem is, I never want to be able to do a git svn rebase or even worse a git svn dcommit while I am on a local branch. I only want to do this while I am on the master branch.

How I can make sure that git prevents these operations ?

I tried to give dummies via git config branch.<name>.remote but this does not help for git svn rebase and git svn dcommit.

Any other ideas ?

Answer 1

An other idea would go like this.

function git () {
  if [[ "$1" = svn ]] && [[ "$2" =~ dcommit|rebase ]]; then
    # allow git-svn dcommit/rebase only on master
    if git branch --show-current | grep -q master; then
      echo "Master branch check passed" >&2
      command git "$@"
    else
      echo "Disallowed - not on master" >&2
      return 1
    fi
  else
    # subcommand filter passthrough
    command git "$@"
  fi
}

This shadows /usr/bin/git with a bash function named git — all it does is detecting the commands you want to disallow to yourself, and passing them through (or not) to the real executable (command git).