#!/bin/sh -efu
# configure hasher (implies that 30-users has been run already)

ARCH="$(rpm --eval '%_host_cpu')"
[ -n "$ARCH" ] || exit 2

gray="$(echo -ne "\\033[0;37m")"
white="$(echo -ne "\\033[1;37m")"
cyan="$(echo -ne "\\033[1;36m")"

# root
cat >> /root/.bash_profile << EOF

ram="\$(awk '/^MemTotal/ { print int(\$2/1024+0.5) }' /proc/meminfo)"
swap="\$(awk '/^SwapTotal/ { print int(\$2/1024+0.5) }' /proc/meminfo)"
tmpfs="\$(df -kT /tmp 2>/dev/null \\
	| awk '/^[a-zA-Z_0-9/-]+[[:space:]]+tmpfs/ { print int(\$3/1024); }')"

cat << EOH
Welcome to live builder host system!

Memory: $cyan\${ram}M$gray, swap: $cyan\${swap}M$gray
Autoconfigured tmpfs on /tmp: $cyan\${tmpfs}M$gray

Run ${white}swapon${gray}(8) on any local swaps you might like to employ
followed by ${white}service livecd-tmpfs restart${gray} to reconfigure tmpfs

EOH
EOF

# predefined passwordless livecd user
USER="altlinux"
if ! id "$USER" >&/dev/null; then
	echo "No such user '$USER'" >&2
	exit
fi

# ~
HOME="/home/$USER"
install -dm750 -o "$USER" -g "$USER" "$HOME"

# http://altlinux.org/tmpfs
TMP="/tmp/.private/$USER"

# we honestly don't know much more
if type -t git && type -t su; then
	su - -c "git config --global user.email $USER@localhost" "$USER"
	su - -c "git config --global user.name 'live builder'" "$USER"
fi >&/dev/null

# developer should feel comfortable, eh? ;-)
ZSHELL="/bin/zsh"
if [ -x "$ZSHELL" ]; then
	chsh -s "$ZSHELL" "$USER"
	install -m644 -o "$USER" -g "$USER" /dev/null "$HOME/.zshrc"
	cat >> "$HOME/.zsh_history" <<-EOF
	git clone git://git.altlinux.org/gears/m/mkimage-profiles.git && cd mkimage-profiles && make help/distro
	make -C /usr/share/mkimage-profiles syslinux.iso
	git clone git://git.altlinux.org/gears/h/hello.git && cd hello && gear-hsh
	EOF
fi

if type -t screen; then
	cat >> "$HOME/.screenrc" <<-EOF
	caption always "%{+b rk}%H%{gk} |%c %{yk}%d.%m.%Y | %72=Load: %l %{wk}"
	defscrollback 1000
	EOF
fi >&/dev/null

cat >> "$HOME/.profile" << EOF
alias l='ls -l'
alias m='cd /usr/share/mkimage-profiles'
clear
cat << EOH
Welcome to live builder environment!
Here are some ALT package/image build tools prepared for you:
* ${white}gear${gray}(1) -- see ${cyan}http://en.altlinux.org/gear${gray};
* ${white}hsh${gray}(1)  -- see ${cyan}http://en.altlinux.org/hasher${gray};
* ${white}mkimage${gray} -- see ${cyan}http://en.altlinux.org/mkimage${gray};
* ${white}mkimage-profiles${gray} described in Russian at ${cyan}http://altlinux.org/m-p${gray}

Examples (use right/middle mouse button to paste; see ~/hasher/repo/):
* ${white}git clone git://git.altlinux.org/gears/h/hello.git && cd hello && gear-hsh${gray}
* ${white}make -C /usr/share/mkimage-profiles syslinux.iso${gray}

EOH
EOF

# rpm
sed -i '/^%_tmppath.*tmp$/d' "$HOME/.rpmmacros"
cat << EOF >> "$HOME/.rpmmacros"
%packager	Unknown <nobody@altlinux.org>
%_target_cpu	$ARCH
%_tmppath	$TMP
%_sourcedir	%{_topsrcdir}/SOURCES/%name
EOF

# hasher
WORKDIR="$TMP/hasher"
ln -s "$WORKDIR" "$HOME/hasher"
echo "rpm-dir file://$HOME/hasher/repo $ARCH hasher" \
	>> /etc/apt/sources.list.d/hasher.list

mkdir "$HOME/.hasher"
cat >> "$HOME/.hasher/config" << EOF
packager="\$(rpm --eval %packager)"
def_target=$ARCH
export GCC_USE_CCACHE=1
mkdir -p "$WORKDIR"
EOF

# online repo needs network not isolation
echo "export share_network=1" >> /etc/profile.d/hasher.sh
chmod +x /etc/profile.d/hasher.sh

# squashfs-tools 4.3+
echo "allowed_mountpoints=/proc" >> /etc/hasher-priv/system

# requisite
hasher-useradd "$USER"