#!/usr/bin/env zsh
# bootstrap - populate a home with the most necessary scripts
# After running this, other packages can be installed using 'ct'
# Note: Since caretaker is written in zsh, this script also is.
# This way, I don't have to check for zsh somewhere in the script,
# and also have an excuse for using zsh here :P

setopt err_exit
trap "print -P '\n%N:%i: bootstrap failed ($?)'" ZERR
typeset -i rcempty=0
typeset PKG_ROOT PKG_DIR default_path='~/packages'
: ${XDG_CONFIG_HOME=$HOME/.config}

if ! which git &> /dev/null; then
	echo - 'It appears that git is not available on this system.'
	echo - '-Installation aborted-'
	exit 200
fi

if [[ $# -ge 4 ]] {
	PKG_PROTO=$1
	PKG_USER=$2
	PKG_HOST=$3
	PKG_PATH=$4
	PKG_DIR=${~${5-$default_path}}
} else {
	cat <<- meow
		Usage: ./bootstrap PKG_PROTO PKG_USER PKG_HOST PKG_PATH [PKG_DIR]
		PKG_PROTO : the protocol type, e.g. ssh, file or git.
		PKG_USER : user on the package root host. May be left out if it
		         is identical to the local user name.
		PKG_HOST : remote host to connect to
		PKG_PATH : package root path on the remote host
		PKG_DIR : the path where caretaker and all further packages will be installed,
		        by default $default_path

		Examples: ./bootstrap ssh '' aneurysm /home/derf/var/packages_root
		          ./bootstrap file '' '' /home/derf/var/packages_root
		          ./bootstrap ssh derf derf.homelinux.org /home/derf/var/packages_root
		          etc.
	meow
	exit 100
}

if [[ -n ${PKG_USER} ]] {
	PKG_UAH="${PKG_USER}@${PKG_HOST}"
} else {
	PKG_UAH=${PKG_HOST}
}

# zsh keeps complaining about not having a configuration,
# so let's be kind and give it an empty one.
if ! [[ -e ~/.zshrc ]] {
	echo 'Creating empty zshrc'
	rcempty=1
	touch ~/.zshrc
}

echo 'Creating the basic directory structure'
mkdir -p ~/bin
path=(~/bin $path)
mkdir -p $PKG_DIR/.collected/man/man{1..8}

echo 'Fetching the caretaker package...'
cd $PKG_DIR
git clone "${PKG_PROTO}://${PKG_UAH}/${PKG_PATH}/caretaker" caretaker
cd caretaker

echo "Writing $XDG_CONFIG_HOME/caretaker/caretaker.conf"
mkdir -p $XDG_CONFIG_HOME/caretaker

cat > $XDG_CONFIG_HOME/caretaker/caretaker.conf <<- flurbl
	PKG_DIR="${PKG_DIR/${HOME}/\${HOME}/"
	PKG_ROOTS=(default)

	function pkgroot_default {
		PKG_PROTO='${PKG_PROTO}'
		PKG_USER='${PKG_USER}'
		PKG_HOST='${PKG_HOST}'
		PKG_PATH='${PKG_PATH}'
	}
flurbl

echo 'Installing caretaker package'
rehash

bin/checklinks
bin/ct eval update_collected caretaker
bin/ct eval exec_hook caretaker post-add
bin/ct update

if (( rcempty )) {
	echo 'Removing empty zshrc'
	rm ~/.zshrc
}

cat <<- tac
	
	bootstrap finished.
	Package directory: $PKG_DIR,
	config path      : $XDG_CONFIG_HOME/caretaker/caretaker.conf
tac

if [[ $PATH != *$HOME/bin* ]] {
	cat <<- tac
		
		Note: You may need to change your PATH to include ~/bin,
		otherwise certain parts of caretaker will not work.
	tac
}