#!/usr/bin/bash
# reset environment variables that could interfere with normal usage
unset -v GREP_OPTIONS
# put all utility functions here

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

git_extra_default_branch() {
    local extras_default_branch init_default_branch
    extras_default_branch=$(git config --get git-extras.default-branch)
    init_default_branch=$(git config --get init.defaultBranch)
    if [ -n "$extras_default_branch" ]; then
        echo "$extras_default_branch"
    elif [ -n "$init_default_branch" ]; then
        echo "$init_default_branch"
    else
        echo "main"
    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
