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#!/bin/sh
#
# xrdp: A Remote Desktop Protocol server.
#
# Copyright (C) 2021 Matt Burt, all xrdp contributors
#
# 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.
#
# Wrapper to call install_pulseaudio_sources.sh and tidy up afterwards
# ---------------------------------------------------------------------------
# G L O B A L S
# ---------------------------------------------------------------------------
# Where the output files are going. Must be under $HOME as schroot
# assumes this.
PULSE_DIR=$HOME/pulseaudio.src
# Absolute path to the script we're wrapping. This picks it up from
# the same directory this file is in
WRAPPED_SCRIPT=$(cd $(dirname $0) && pwd)/install_pulseaudio_sources_apt.sh
# The buildroot directory. Choose fast, temporary storage if available
BUILDROOT=/var/lib/pa-build/$USER
# Extra packages to install in the build root which the wrapped script
# may be using. These are packages available by default when using
# GitHub actions
WRAPPED_SCRIPT_DEPS="sudo lsb-release"
# -----------------------------------------------------------------------------
# I N S T A L L R E Q U I R E D P A C K A G E S
#
# Installs packages required for the build on the host machine
# -----------------------------------------------------------------------------
InstallRequiredPackages()
{
set -- \
/usr/sbin/debootstrap debootstrap \
/usr/bin/schroot schroot \
/usr/bin/lsb_release lsb-release
pkgs=
while [ $# -ge 2 ]; do
if [ ! -x $1 ]; then
pkgs="$pkgs $2"
fi
shift 2
done
if [ -n "$pkgs" ]; then
echo "- Need to install packages :$pkgs"
echo
echo " These can be removed when this script completes with:-"
echo " sudo apt-get purge$pkgs && apt-get autoremove"
echo
sudo apt-get install -y $pkgs
fi
}
# -----------------------------------------------------------------------------
# R U N W R A P P E D S C R I P T
#
# Runs the wrapped build script using schroot
#
# This function definition uses () rather than {} to create an extra
# sub-process where we can run 'set -e' without affecting the parent
# -----------------------------------------------------------------------------
RunWrappedScript()
(
# In this sub-process, fail on error
set -e
# Install extra dependencies
schroot -c pa-build-$USER -u root -- \
apt-get install -y $WRAPPED_SCRIPT_DEPS
# Allow normal user to sudo without a password
schroot -c pa-build-$USER -u root -- \
/bin/sh -c "echo '$USER ALL=(ALL) NOPASSWD:ALL'>/etc/sudoers.d/nopasswd-$USER"
schroot -c pa-build-$USER -u root -- chmod 400 /etc/sudoers.d/nopasswd-$USER
# Call the wrapped script
schroot -c pa-build-$USER -- /wrapped_script -d $PULSE_DIR
)
# -----------------------------------------------------------------------------
# M A I N
# -----------------------------------------------------------------------------
# Start with a few sanity checks
if [ -d $PULSE_DIR ]; then
echo "** Target directory $PULSE_DIR already exists" >&2
exit 0
fi
if [ ! -x $WRAPPED_SCRIPT ]; then
echo "** Can't find wrapped script $WRAPPED_SCRIPT" >&2
exit 1
fi
if [ -e $BUILDROOT ]; then
echo "** Remove old build root $BUILDROOT before running this script"
exit 1
fi
# Do we need extra packages?
InstallRequiredPackages || exit $?
# We should be able to determine the distro now
distro=$(lsb_release -cs) ; # e.g. 'bullseye'
if [ -z "$distro" ]; then
echo "** Can't determine current distro" >&2
exit 1
fi
# Create the build root
log=/var/tmp/pa-build-$USER-debootstrap.log
echo "- Creating $distro build root. Log file in $log"
sudo debootstrap $distro $BUILDROOT >$log 2>&1 || {
echo "** debootstrap failed. Check log file" >&2
exit 1
}
# Create the config file for schroot
schroot_conf=/etc/schroot/chroot.d/pa-build-$USER.conf
echo "- Creating schroot config file $schroot_conf"
{
echo "[pa-build-$USER]"
echo "description=Build PA on current system for $USER"
echo "directory=$BUILDROOT"
echo "root-users=$USER"
echo "users=$USER"
echo "type=directory"
} | sudo tee $schroot_conf >/dev/null || exit $?
# Copy some files to the build root
for file in /etc/apt/sources.list; do
echo "- Copying $file to the root"
sudo cp $file $BUILDROOT/$file || exit $?
done
# Copy the wrapped script to the buildroot root
echo "- Copying the wrapped script to the root"
sudo cp $WRAPPED_SCRIPT $BUILDROOT/wrapped_script || exit $?
sudo chmod +x $BUILDROOT/wrapped_script || exit $?
# Run the wrapped script
log=/var/tmp/pa-build-$USER-schroot.log
echo "- Building PA sources. Log file in $log"
RunWrappedScript >$log 2>&1 || {
echo "** schroot failed. Check log file" >&2
exit 1
}
# Done! Remove the schroot config file as its no longer needed
echo "- Removing schroot config file and build root"
sudo rm -rf $schroot_conf $BUILDROOT
echo "- All done. Configure PA xrdp module with PULSE_DIR=$PULSE_DIR"
exit 0
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