#!/bin/bash
USER=`whoami`
UBUIMG="ubuntu-18.04-minimal-cloudimg-amd64-root.tar.xz"
UBUIMGURL="http://cloud-images.ubuntu.com/minimal/releases/bionic/release/$UBUIMG"
UBUROOT="/home/$USER/minubugub"
if [ -f "$UBUROOT" ]; then echo "$UBUROOT is a file, aborting"; exit 1; fi
if [ -d "$UBUROOT" ]; then echo "$UBUROOT already exists, aborting"; exit 1; fi
echo "=====> INSTall MINimal UBUntu and GUB, bootstrap GUB by building lilypond master"
echo "We need to use sudo for some commands ..."
sudo echo "Thanks!"
echo "=====> cd to new installation directory $UBUROOT"
mkdir -p $UBUROOT
cd $UBUROOT
echo "=====> download ubunutu 18.04 minimal cloudimage"
wget $UBUIMGURL
if [ ! -f "$UBUROOT/$UBUIMG" ]; then echo "Failed do download $UBUIMG, aborting"; exit 1; fi
echo "=====> decompress and untar"
xz -cd ubuntu-18.04-minimal-cloudimg-amd64-root.tar.xz | sudo tar -xf -
# You might remove the archive to save some disk space.
# rm ubuntu-18.04-minimal-cloudimg-amd64-root.tar.xz
echo "=====> set nameserver in $UBUROOT/etc/resolv.conf"
sudo rm etc/resolv.conf
echo "nameserver 8.8.8.8" | sudo tee etc/resolv.conf
echo "=====> we need /proc in the chroot system, add it also to /etc/fstab if not already present"
if [ -z "`sudo grep -o $UBUROOT/proc /etc/fstab`" ]; then
  echo "/proc $UBUROOT/proc none defaults,bind  0 0" | sudo tee -a /etc/fstab
fi
sudo mount $UBUROOT/proc
echo "adapt $UBUROOT/root/.bashrc"
echo 'if [ -z "`id -u gub`" ]; then' | sudo tee -a $UBUROOT/root/.bashrc
echo '  adduser --disabled-password --gecos "" gub' | sudo tee -a $UBUROOT/root/.bashrc
echo '  apt-get --yes update' | sudo tee -a $UBUROOT/root/.bashrc
echo '  apt-get --yes upgrade' | sudo tee -a $UBUROOT/root/.bashrc
echo '  apt-get --yes --no-install-recommends install file git gcc g++ ' \
               'libc6-dev-i386 make texlive-plain-generic texlive-fonts-recommended ' \
               'texlive-metapost texlive-xetex unzip zip' \
               | sudo tee -a $UBUROOT/root/.bashrc
echo '  cp /root/initgub /home/gub' | sudo tee -a $UBUROOT/root/.bashrc
echo '  chmod 700 /home/gub/initgub' | sudo tee -a $UBUROOT/root/.bashrc
echo '  chown gub:users /home/gub/initgub' | sudo tee -a $UBUROOT/root/.bashrc
echo '  su gub -c /home/gub/initgub' | sudo tee -a $UBUROOT/root/.bashrc
echo '  rm /home/gub/initgub' | sudo tee -a $UBUROOT/root/.bashrc
echo '  exit 0' | sudo tee -a $UBUROOT/root/.bashrc
echo 'else' | sudo tee -a $UBUROOT/root/.bashrc
echo '  cd /home/gub/gub' | sudo tee -a $UBUROOT/root/.bashrc
echo '  su gub' | sudo tee -a $UBUROOT/root/.bashrc
echo 'fi' | sudo tee -a $UBUROOT/root/.bashrc
echo "=====> create gub init script"
echo '#!/bin/bash' | sudo tee $UBUROOT/root/initgub
echo 'cd /home/gub' | sudo tee -a $UBUROOT/root/initgub
echo 'git clone https://github.com/gperciva/gub.git' | sudo tee -a $UBUROOT/root/initgub
echo 'cd /home/gub/gub' | sudo tee -a $UBUROOT/root/initgub
echo 'echo "=====> download source archives"' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only linux-x86::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only linux-64::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only linux-ppc::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only freebsd-x86::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only freebsd-64::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only darwin-ppc::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only darwin-x86::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only mingw::lilypond-installer' | sudo tee -a $UBUROOT/root/initgub
echo 'bin/gub --download-only linux-64::lilypond-doc' | sudo tee -a $UBUROOT/root/initgub
echo 'echo -e "\n\n=====> start make lilypond ... this will take some hours!\n\n"' | sudo tee -a $UBUROOT/root/initgub
echo 'mkdir regtests' | sudo tee -a $UBUROOT/root/initgub
echo 'touch regtests/ignore' | sudo tee -a $UBUROOT/root/initgub
echo 'make lilypond' | sudo tee -a $UBUROOT/root/initgub
echo 'exit 0' | sudo tee -a $UBUROOT/root/initgub
sudo chroot $UBUROOT
echo "Installers etc. in $UBUROOT/home/gub/gub/uploads:"
ls -l $UBUROOT/home/gub/gub/uploads