gucr.in

#!/usr/bin/env bash

m4_include(gu_tools.inc.sh)

usage() {
  printf '%s\n' \
      'gucr @VERSION@' \
      '' \
      'gucr creates new branches based from a specified branch or ' \
      'from default ${BASED_BRANCH} branch.' \
      '' \
      'Usage: gucr [-h] [[-C] create] [-r remote] [-b branch]' \
      '' \
      '    -h      Show this usage.' \
      '    create: Name of the branch to create.' \
      '    remote: Name of the remote to base/create from.' \
      '    branch: Name of the branch to base/create from.'
}

# defaults
if [ -z "${REMOTE-}" ]; then
  REMOTE=origin
fi

if [ -z "${BRANCH-}" ]; then
  BRANCH=${BASED_BRANCH}
fi

# process flags
pointer=1
while [[ $pointer -le $# ]]; do
   if [[ ${!pointer} != "-"* ]]; then ((pointer++)) # not a parameter flag so advance pointer
   else
      param=${!pointer}
      ((pointer_plus = pointer + 1))
      slice_len=1

      case $param in
         # paramter-flags with arguments
         -R|--create) CREATE=${!pointer_plus}; ((slice_len++));;
         -r|--remote) REMOTE=${!pointer_plus}; ((slice_len++));;
         -b|--branch) BRANCH=${!pointer_plus}; ((slice_len++));;

         # binary flags
         -h|--help) HELP=true;;
      esac

      # splice out pointer frame from positional list
      [[ $pointer -gt 1 ]] \
         && set -- ${@:1:((pointer - 1))} ${@:((pointer + $slice_len)):$#} \
         || set -- ${@:((pointer + $slice_len)):$#};
   fi
done

if [ ! -z "${HELP-}" ]; then
  usage
  exit 0
fi

if [ -z "${CREATE-}" ]; then
  CREATE=$1
fi

set -e

if remote_avail ${REMOTE}; then
    git_cleaning && git checkout ${BRANCH} && git pull
    git checkout ${BRANCH} -b ${CREATE}
fi

# vim: set et ts=2 sw=2: