#!/bin/bash
set -e

if ! git diff-index --quiet HEAD; then
    set +x
    echo "There are uncommitted changes:"
    git status --short
    echo "Doing nothing to avoid losing your work."
    exit 1
fi

remote_default="$(git config zulip.zulipRemote || echo upstream)"

request_id="$1"
remote=${2:-"$remote_default"}

set -x
git fetch "$remote" "pull/$request_id/head"
git reset --hard FETCH_HEAD