#!/bin/bash
set -e

[[ -z $1 ]] && echo "usage: ${0##*/} <mount point>" && exit 1
target=$1

[[ ! -d $target/ ]] && echo $target/ does not exist && exit 1
[[ -z `mount | grep ${target%%/}` ]] && echo partition is not mounted into $target/ && exit 1

[[ ! -f slackstart.conf ]] && echo slackstart.conf missing && exit 1
echo -n sourcing slackstart.conf ...
. ./slackstart.conf && echo done

[[ -z $mirror ]] && echo define mirror && exit 1

echo -n disabling non-root login ...
echo non-root login has been disabled > lala/etc/nologin && echo done

echo -n locale and bash aliases in /etc/shrc ...
if [[ -f lala/etc/shrc ]]; then
	echo already
else
	# beware escapes are in there - $ - ` - $NF
	cat > lala/etc/shrc <<-EOF && echo done
	export PATH=\$PATH:/etc/rc.d
	export MAKEFLAGS=-j\$((\`grep ^processor /proc/cpuinfo | tail -1 | awk '{print \$NF}'\` + 1))

	export LC_ALL=en_US.UTF-8
	export LANG=en_US.UTF-8
	export LANGUAGE=en_US:en

	alias ll='ls --color=auto --group-directories-first -alh'
	alias ls='ls --color=auto --group-directories-first'
	alias ps2='ps --pid 2 --ppid 2 --deselect ufw'
	alias cp='cp -i'
	alias mv='mv -i'
	alias rm='rm -i'
	EOF
fi

echo -n enabling shrc in /etc/profile ...
if [[ -f lala/etc/profile.dist ]]; then
	echo already
else
	cp -p /etc/profile /etc/profile.dist
	echo source /etc/shrc >> lala/etc/profile && echo done
fi

	#rc.inet2 \
# deal with minimal
echo disabling few init scripts
for f in rc.cpufreq rc.loop; do
	chmod -x lala/etc/rc.d/$f
done; unset f
	#rc.modules \
	#rc.modules.local \

	# full
	#rc.acpid \
	#rc.atd \
	#rc.bluetooth \
	#rc.fuse \
	#rc.fuse3 \
	#rc.haveged \
	#rc.mcelog \
	#rc.wireless \
	#[[ -f lala/etc/rc.d/$f ]] && chmod -x lala/etc/rc.d/$f && echo $f init script disabled

echo -n setting up slackpkg ...
if [[ -f lala/etc/slackpkg/mirrors.dist ]]; then
	echo already
else
	mv -i lala/etc/slackpkg/mirrors lala/etc/slackpkg/mirrors.dist
	# trailing-slash already there
	cat > lala/etc/slackpkg/mirrors <<EOF && echo done
$mirror
EOF
fi

echo -n setting up ssh daemon ...
if [[ -f lala/etc/ssh/sshd_config.dist ]]; then
	echo already done
else
	mv lala/etc/ssh/sshd_config lala/etc/ssh/sshd_config.dist
	grep -vE '^#|^$' lala/etc/ssh/sshd_config.dist > lala/etc/ssh/sshd_config.clean
	sed -r 's/^UsePAM.*/usepam no/' lala/etc/ssh/sshd_config.clean > lala/etc/ssh/sshd_config && echo done || echo FAIL
	echo 'hostkey /etc/ssh/ssh_host_ed25519_key' >> lala/etc/ssh/sshd_config
fi

# we want a clean config file and trust the right host key upon first connection
echo -n handy log viewer ...
cat > lala/root/log <<EOF && echo done
tail -n0 -F /var/log/*
EOF
chmod +x lala/root/log

cat > lala/etc/rc.d/rc.local_shutdown <<EOF
#!/bin/bash

EOF
chmod +x lala/etc/rc.d/rc.local_shutdown

ln -sf ../etc/rc.d/rc.inet1 lala/root/rc.inet1
ln -sf ../etc/rc.d/rc.inet2 lala/root/rc.inet2
ln -sf ../etc/rc.d/rc.local lala/root/rc.local
ln -sf ../etc/rc.d/rc.local_shutdown lala/root/rc.local_shutdown

echo all done