#!/bin/bash
case "$1" in
  --help | -h)
    cat <<EOF

    Description:
    "git checkout" on steroids

    Usage:
    gc [--help|--new-branch] [branch]

    Options:
    -h, --help        Print this help.
    -b, --new-branch  Create a new Branch instead changing to an existing branch.

    Author:
    michael.grote@posteo.de - git.mgrote.net
EOF
    ;;
  --new-branch | -b)
    (git checkout --quiet -b "$2" && echo '>>> Create new branch "'"$2"'"') || \
    (git checkout --quiet "$2" > /dev/null 2>&1 && echo '>>> Branch already exists, checking out... ')
    ;;
  *)
    if [ -n "$1" ] ; then
      (echo ">>> Try local checkout" && git checkout --quiet "$1" > /dev/null 2>&1) || \
      (echo ">>> Try remote checkout" && git checkout --quiet -b "$1" origin/"$1" > /dev/null 2>&1 || echo ">>> Unkown branch! ")
    else
      (git checkout --quiet master > /dev/null 2>&1 && echo '>>> Try checking out master') || \
      (git checkout --quiet main > /dev/null 2>&1 && echo '>>> Try checking out main') || \
      (git checkout --quiet release > /dev/null 2>&1 && echo '>>> Try checking out release')
    fi
esac