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#!/bin/bash
#
# Copyright (C) 2018 The Android Open Source Project
#
# 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.
#
set -e
SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd -P)
usage() {
echo -n "usage: $0 [-h] [-s wheezy|stretch] [-a amd64|arm64] "
echo "[-m http://mirror/debian] [-n net_test.rootfs.`date +%Y%m%d`]"
exit 1
}
mirror=http://ftp.debian.org/debian
debootstrap=debootstrap
suite=stretch
arch=amd64
while getopts ":hs:a:m:n:" opt; do
case $opt in
h)
usage
;;
s)
if [ "$OPTARG" != "wheezy" -a "$OPTARG" != "stretch" ]; then
echo "Invalid suite: $OPTARG" >&2
usage
fi
suite=$OPTARG
;;
a)
if [ "$OPTARG" != "amd64" -a "$OPTARG" != "arm64" ]; then
echo "Invalid arch: $OPTARG" >&2
usage
fi
arch=$OPTARG
;;
m)
mirror=$OPTARG
;;
n)
name=$OPTARG
;;
\?)
echo "Invalid option: $OPTARG" >&2
usage
;;
:)
echo "Invalid option: $OPTARG requires an argument" >&2
usage
;;
esac
done
name=net_test.rootfs.$arch.`date +%Y%m%d`
# Switch to qemu-debootstrap for incompatible architectures
if [ "$arch" = "arm64" ]; then
debootstrap=qemu-debootstrap
fi
# Sometimes it isn't obvious when the script fails
failure() {
echo "Filesystem generation process failed." >&2
}
trap failure ERR
# Import the package list for this release
packages=`cat $SCRIPT_DIR/rootfs/$suite.list | xargs | tr -s ' ' ','`
# For the debootstrap intermediates
workdir=`mktemp -d`
workdir_remove() {
echo "Removing temporary files.." >&2
sudo rm -rf $workdir
}
trap workdir_remove EXIT
# Run the debootstrap first
cd $workdir
sudo $debootstrap --arch=$arch --variant=minbase --include=$packages \
$suite . $mirror
# Workarounds for bugs in the debootstrap suite scripts
for mount in `cat /proc/mounts | cut -d' ' -f2 | grep -e ^$workdir`; do
echo "Unmounting mountpoint $mount.." >&2
sudo umount $mount
done
# Copy the chroot preparation scripts, and enter the chroot
for file in $suite.sh common.sh net_test.sh; do
sudo cp -a $SCRIPT_DIR/rootfs/$file root/$file
sudo chown root:root root/$file
done
sudo chroot . /root/$suite.sh
# Leave the workdir, to build the filesystem
cd -
# For the final image mount
mount=`mktemp -d`
mount_remove() {
rmdir $mount
workdir_remove
}
trap mount_remove EXIT
# Create a 1G empty ext3 filesystem
truncate -s 1G $name
mke2fs -F -t ext3 -L ROOT $name
# Mount the new filesystem locally
sudo mount -o loop -t ext3 $name $mount
image_unmount() {
sudo umount $mount
mount_remove
}
trap image_unmount EXIT
# Copy the patched debootstrap results into the new filesystem
sudo cp -a $workdir/* $mount
# Fill the rest of the space with zeroes, to optimize compression
sudo dd if=/dev/zero of=$mount/sparse bs=1M 2>/dev/null || true
sudo rm -f $mount/sparse
echo "Debian $suite for $arch filesystem generated at '$name'."
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