git-missing

#!/bin/bash

usage() {
	cat <<-EOF
		git missing [-h] [--theirs] [--mine] [[remote/]branch]
	EOF
}

git-missing() {
	local do_both=1
	local do_mine=0
	local do_theirs=0
	local refarg=

	while [ $# -ne 0 ]; do
		case "${1}" in
			-h|--help)
				usage
				exit 0
				;;

			--the|--thei|--their|--theirs)
				do_both=0
				do_theirs=1
				echo got theirs
				;;

			--min|--mine)
				do_both=0
				do_mine=1
				echo got mine
				;;

			-*)
				echo "Invalid argument: ${1}"
				usage
				exit 1
				;;

			*)
				if [[ -n "${refarg}" ]]; then
					echo "Unexpected argument: ${1}"
					usage
					exit 1
				fi
				refarg=${1}
				;;
		esac
		shift
	done

	local mine="$(git rev-parse --abbrev-ref HEAD)"
	local remote="$(git config --local branch.${mine}.remote)"
	local theirs="${refarg:-${remote_ref:-origin}/${mine}}"

	if [[ "${theirs}" =~ .+/.+ ]]; then
		local remote="${theirs%%/*}"
		local branch="${theirs#*/}"
		if [[ -n "${remote}" ]]; then
			git fetch "${remote}" "${branch}"  || exit $?
		fi
	fi

	if [[ "${do_both}" == 1 || "${do_theirs}" == 1 ]]; then
		printf "\nTheirs: $t\n==============\n"
		git --no-pager log "${mine}..${theirs}" || exit $?
		printf "\n"
	fi
	if [[ "${do_both}" == 1 || "${do_mine}" == 1 ]]; then
		printf "\nMine: ${mine}\n==============\n"
		git --no-pager log "${theirs}..${mine}" || exit $?
	fi
}

git-missing "$@"