git-squash

#!/bin/sh

# To squash the last three commits: git squash 3
# It will open an interactive editor so you can 
#  more easily combine the comments

source "$(git --exec-path)/git-sh-setup"

USAGE="COMMITS"
function _squash() {
  if [[ $# == 1 ]]; then
    if [[ -n $(git rev-parse --verify --quiet HEAD~$1) ]]; then
      git reset --soft HEAD~$1 && 
      git commit --edit -m"$(git log --format=%B --reverse HEAD..HEAD@{1})"
    else
      die "HEAD~$1 does not exist"
    fi
  else
    usage
  fi
}

_squash $1