git pre-commit hook for format go source files

githook.sh

#!/usr/bin/env bash

cd `dirname $0`
if [ "githook.sh" = "`basename $0`" ]; then
    gitroot=$(git rev-parse --show-toplevel)
    cp -f ${gitroot}/scripts/githook.sh ${gitroot}/.git/hooks/pre-commit
    chmod u+x ${gitroot}/.git/hooks/pre-commit
    exit 0
elif [ "pre-commit" = "`basename $0`" ]; then
    cd ../..
    gitroot=$(git rev-parse --show-toplevel)
    if [ -z "${gitroot}" ]; then
        echo "can not find repository root"
        exit 1
    fi
    cp -f ${gitroot}/scripts/githook.sh ${gitroot}/.git/hooks/pre-commit
    chmod u+x ${gitroot}/.git/hooks/pre-commit
fi

if [ -n "${USERPROFILE}" ]; then
    gituser="$(chcp.com 65001 &> /dev/null;net user //domain $(id -un) | awk -F '[ ][(]' '/Full Name/{print $1}' | awk -F 'Full Name[ ]+' '{print $2}') $(id -un | cut -c 2-)"
    git config --global user.name "${gituser}"
    suffix=".exe"
fi

formatter="${gitroot}/bin/goimports${suffix}"
if [ ! -f "${formatter}" ]; then
    echo "can not find goimports file"
    exit 1
fi
chmod +x ${formatter}

export GOPATH="${gitroot}"
cd ${GOPATH}
for f in `git diff --cached --name-only --diff-filter=ACM`; do
    if [ -z "${f}" -o ! -f "${f}" ] || [[ ! "${f}" =~ .go$ ]]; then
        continue
    fi
    sed -i '/import (/,/)/{/^$/d}' ${f}
    ${formatter} -local "code.xxxxx.com,aaa,bbb" -w ${f}
    git add ${f}
done