#!/bin/sh

# Load settings

set -e

. ./defaults.cfg || exit 1

readref() {
	ref="$1"

	cat "$ref" |head -1
}

findsettingsdir() {
	ref="$1"; shift

	for dir in $@; do
		result="`find "$dir" -mindepth 1 -maxdepth 1 -type f -name "$ref" -printf '%h\n'`"
		[ -z "$result" ] && continue
		echo $result
		exit 0
	done
	exit 1
}

findsettings() {
	context="$1"
	settingsfile="$context.cfg"
	reffile="$context"
	shareddir="$2"
	ref="$3"

	# Local settings
	if [ -f "$settingsfile" ]; then
		echo "$settingsfile"
	# Local reference
	elif [ -f "$reffile" ]; then
		if settingsfile="`readref "$reffile"`" && settingsdir="`findsettingsdir "$settingsfile" "$shareddir"`" && [ -f "$settingsdir/$settingsfile" ]; then
			echo "$settingsdir/$settingsfile"
		else
			echo >&2 "E: Failed setting $context: Unable to resolve the settings file from the file \"$reffile\"."
			exit 1
		fi
	# Reference chained from earlier settings
	elif [ -n "$ref" ]; then
		settingsfile="$ref"
		if settingsdir="`findsettingsdir "$settingsfile" "$shareddir"`" && [ -f "$settingsdir/$settingsfile" ]; then
			echo "$settingsdir/$settingsfile"
		else
			echo >&2 "E: Failed setting $context: Unable to locate settings file \"$ref\"."
			exit 1
		fi
	else
		echo >&2 "E: No $context config found - refer to a shared settings file in the file \"$reffile\" or write a custom settings file \"$settingsfile\"."
		exit 1
	fi
}

. `findsettings host hosts $host`
. `findsettings target targets $target`

. ./defaults-aftermath.cfg || exit 1