#!/bin/sh

set -e

[ "$1" ] || { echo "usage: install.sh <target directory>" && exit 0; }

lixmnt="$(mktemp -d)"
trap 'trap - INT; kill -s INT "$$"; rmdir "$lixmnt"' INT
trap 'rmdir "$lixmnt"' EXIT

echo "pulling the lix-os package..."
lix pull lix-os

echo "transferring lix-os dependency chroot contents to target..."
lix deps lix-os | awk '{ print "lix/" $1 "/" $2 "/fs" }' | while read layer; do
    echo "copying from $layer"
    rsync -ah --info=progress2 --force "$(lyr upperdir $layer)/" "$1/"
done

## below is the old way this was done.  this required a custom "mount" binary.
## works fine in lix os, but not in host distributions used for bootstrapping.
## lix os' mount sets aside a whopping 8KiB for the option string.  if the
## option string is too long for the memory set aside, the "mount"
## implementations the author has used fail silently!
#echo "transferring lix-os chroot contents to target..."
#lix mount "$lixmnt" lix-os
#rsync -ah --info=progress2 --force "$lixmnt/" "$1/"
#lix umount "$lixmnt" lix-os
#umount "$lixmnt"

transfer() {
    if [ -d "$1" ]; then
        mkdir -p "$2"
        rsync -ah --info=progress2 --force "$1" "$2"
    else
        echo "unable to find $1! transfer manually before proceeding..." >&2
    fi
}

echo "transferring lyr state to target..."
transfer "/usr/var/lyr/" "$1/var/lyr/"

echo "transferring src state to target..."
transfer "/usr/var/src/" "$1/var/src/"

echo "transferring src state to target..."
transfer "/usr/var/src/" "$1/var/src/"

echo "removing LICENSE and README in target system root..."
[ ! -f "$1/LICENSE" ] || rm "$1/LICENSE"
[ ! -f "$1/README" ] || rm "$1/README"