簡易に git merge する奴

git-merge.sh

#!/bin/bash

# Usage: git-merge.sh [branch]
#    ex: git-merge.sh master

set -ue
# set -e ... 途中でエラーが発生したら止める
# set -u ... 未定義の変数を参照したらエラー

if [[ $# == 0 ]];
    then
    echo "Usage: git-merge.sh [branch]"
    echo "   ex: git-merge.sh master"
    exit 1
fi

TO="$1"
FROM=`git rev-parse --abbrev-ref HEAD`

function confirm() {
    read -p "$@? [y/n] " y
    if [ ! "x$y" = "xy" ];
        then
        echo "Not Confirmed."
        exit 1
    fi
    return 0
}

function echo_and_exec() {
    echo
    echo "> $@"
    $@
}

confirm "git merge $FROM => $TO"

echo_and_exec git checkout $TO
echo_and_exec git pull
echo_and_exec git merge $FROM

echo
confirm "git push origin $TO"

echo_and_exec git push origin $TO
echo_and_exec git checkout $FROM