#!/usr/bin/env bash
set -euo pipefail

root="$(cd "$(dirname "$0")/.." && pwd)"
install_dir="${LAZARET_INSTALL_DIR:-$HOME/.local/bin}"

usage() {
    printf '%s\n' "usage: tools/install-to-host [--install-dir DIRECTORY]"
}

if [ "${1:-}" = "--help" ] && [ "$#" -eq 1 ]; then
    usage
    exit 0
elif [ "${1:-}" = "--install-dir" ] && [ "$#" -eq 2 ]; then
    install_dir="$2"
elif [ "$#" -ne 0 ]; then
    usage >&2
    exit 2
fi

for command in cmp install; do
    command -v "$command" >/dev/null 2>&1 || {
        printf '%s\n' "install-to-host: $command is required" >&2
        exit 1
    }
done

cd "$root"
tools/build

target_dir="$root/.lazaret/target"

install -d -m 755 "$install_dir"
for executable in lazaret lazaret-host-coordinator lazaret-escalation-client; do
    install -m 755 "$target_dir/release/$executable" "$install_dir/$executable"
done
sandbox_init="$target_dir/x86_64-unknown-linux-musl/release/lazaret-sandbox-init"
install -m 755 "$sandbox_init" "$install_dir/lazaret-sandbox-init"

runsc_build_id=9e711e005f13402e728a0c3ada3fdc67a38918da31f720e5be1006edc4272a51
runsc_name="lazaret-runsc-$runsc_build_id"
runsc_source="$root/.lazaret/bin/$runsc_name"
runsc_destination="$install_dir/$runsc_name"
if [[ -e "$runsc_destination" ]]; then
    cmp --silent "$runsc_source" "$runsc_destination" || {
        printf '%s\n' "install-to-host: immutable runsc destination differs: $runsc_destination" >&2
        exit 1
    }
else
    install -m 755 "$runsc_source" "$runsc_destination"
fi

printf '%s\n' "Installed Lazaret in $install_dir"