#!/bin/sh
#
# A minimal alternative to djb redo that doesn't support incremental builds.
# For the full version, visit http://github.com/apenwarr/redo
#
export REDO="$(dirname "$0")/$(basename "$0")"
IFS="
"

if [ -z "$DO_BUILT" ]; then
	export DO_BUILT="$PWD/.do_built"
	if [ -e "$DO_BUILT" ]; then
		echo "Removing previously built files..." >&2
		sort "$DO_BUILT" | uniq | tee "$DO_BUILT.new" | xargs rm -f
		mv "$DO_BUILT.new" "$DO_BUILT"
	fi
fi


_do()
{
	TARGET="$1"
	if [ ! -e "$TARGET" ]; then
		printf '\033[32mdo  \033[1m%s\033[m\n' "$PWD/$TARGET" >&2
		echo "$PWD/$TARGET" >>"$DO_BUILT"
		dof=".$TARGET"
		DOFILE="$TARGET.do"
		while [ ! -e "$DOFILE" ]; do
			dof2=$(echo "$dof" | sed 's/\.[^\.]*//')
			[ "$dof" = "$dof2" ] && break
			dof="$dof2"
			DOFILE="default$dof.do"
		done
		set "$TARGET" "" "$TARGET.tmp"
		( . "$PWD/$DOFILE" >"$TARGET.tmp" ) && 
		mv "$TARGET.tmp" "$TARGET"
	else
		echo "$TARGET exists." >&2
	fi
}


redo()
{
	for i in "$@"; do
		if [ -e "$i/." ]; then
			i="$i/all"
		fi
		D="$(dirname "$i")"
		B="$(basename "$i")"
		( cd "$D" && _do "$B" )
	done
}


alias redo-ifchange="redo"
alias redo-ifcreate=":"
set -e

if [ -n "$*" ]; then
	redo "$@"
else
	redo all
fi