#!/bin/bash

if [ -z "$1" -o -z "$2" ]; then
	>&2 echo "usage: garlicd <bscpkgs directory> <mountpoint directory>"
fi

bscpkgsdir=$(readlink -f "$1")
mountdir=$(readlink -f "$2")
run="$mountdir/run"
completed="$mountdir/completed"

[ -p "$run" ] || mkfifo "$run"
[ -p "$completed" ] || mkfifo "$completed"

cd "$bscpkgsdir"

echo "Waiting for experiments..."

while read -r line < "$run"; do
	echo Attempting to run: $line

	echo Copying files to MN4...
	nix copy --to ssh://mn1 $line
	results=$(garlic -RFv $line)
	echo "The results are: $results"
	drv=$(nix-store -q --deriver $results)
	echo "drv = $drv"
	if [ -z "$drv" ]; then
		echo "Something failed, drv is empty. Check the logs."
	else
		echo -n "$drv" >> "$completed"
	fi
done