mkfs

#!/bin/bash
#
# Copyright (c) 2018 YADRO
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#

FS="$1"

clean() {
    losetup -d "$ldev_path"
}
set -e
echo ',,,;' | sfdisk "$2"
if ! losetup -f &>/dev/null; then
    echo "Can't find unused loop device" >&2
    exit 1
fi
ldev_path=$(losetup -f -P --show "$2")
trap clean EXIT
echo Working with $ldev_path
ldev=${ldev_path#/dev/}
part=${ldev}p1
part_dev_path=/sys/class/block/${part}/dev
if [ ! -r $part_dev_path ]; then
    echo "Can't find partition: $part" >&2
    exit 1
fi

# Workaround for https://github.com/moby/moby/issues/16160
if [ ! -e "/dev/$part" ]; then
    IFS=':' read -r -a part_dev < "$part_dev_path"
    mknod "/dev/$part" b ${part_dev[0]} ${part_dev[1]}
fi

if ! mkfs.$FS "/dev/$part"; then
    exit 1
fi

case $FS in
    xfs)
        xfs_admin -U $3 /dev/$part
        ;;
    ext2|ext3|ext4)
        tune2fs -U $3 /dev/$part
        ;;
    *)
        echo "Don't how to set UUID for $FS" >&2
        exit 1
esac

if [ -n "$4" ]; then
    if [ ! -d "$4" ]; then
        echo "$4 is not a directory" >&2
        exit 1
    fi
    mp=/tmp/$(tr / - <<< "$4")
    mkdir -p "$mp"
    mount -t $FS "/dev/$part" "$mp"
    cp -a "$4/." "$mp"
    umount "$mp"
fi