#!/usr/bin/env bash
# reset environment variables that could interfere with normal usage
export GREP_OPTIONS=
# put all utility functions here

# make a temporary file
git_extra_mktemp() {
    mktemp -t "$(basename "$0")".XXXXXXX
}

git_extra_default_branch() {
    local default_branch
    default_branch=$(git config --get git-extras.default-branch)
    if [ -z "$default_branch" ]; then
        echo "master"
    else
        echo "$default_branch"
    fi
}

usage() {
cat <<HERE
usage: git alias                         # list all aliases
   or: git alias <search-pattern>        # show aliases matching pattern
   or: git alias <alias-name> <command>  # alias a command
HERE
}

case $# in
  0) git config --get-regexp 'alias.*' | sed 's/^alias\.//' | sed 's/[ ]/ = /' | sort ;;
  1) git alias | grep -e "$1" ;;
  2) git config --global alias."$1" "$2" ;;
  *) >&2 echo "error: too many arguments." && usage && exit 1 ;;
esac
