#!/bin/bash

. /etc/init.d/functions.sh

autopatch() {
	local diff level p patches patched 

	[[ ! -d "$PATCH_OVERLAY" ]] && return 0

	patches=$(ls -1 ${PATCH_OVERLAY}/${CATEGORY}/${PN}/{${PN},${P},${PF}}--*.{patch,diff} 2>/dev/null)
	[[ $patches == "" ]] && return 0

	if ! cd ${S}; then
		eerror "FAILED TO cd $S"
		return 1
	fi

	for p in ${patches}; do
		p=$(basename $p)
		diff=${PATCH_OVERLAY}/${CATEGORY}/${PN}/${p}
		if [[ -e $diff ]] && [ ! -e ${S}/.${p} ]; then
			patched=0
			for level in 0 1 2 3 4; do
				if [[ $patched == 0 ]]; then
					patch -g0 --dry -p${level} >/dev/null < $diff
					if [ $? = 0 ]; then
						ebegin "auto patching (-p${level}) ${p}"
						patch -g0 -p${level} < $diff > /dev/null && patched=1
						eend $?
						touch ${S}/.${p}
					fi
				fi
			done
			[[ $patched != 1 ]] && eerror "FAILED auto patching $p"
		else
			[[ ! -e $diff ]] && eerror "$diff does not exist, unable to auto patch"
		fi
	done
	cd $OLDPWD
}

#ewarn "at $EBUILD_PHASE"

case $EBUILD_PHASE in
	compile)	
		ebegin "Checking for auto patches in ${PATCH_OVERLAY}/${CATEGORY}/${PN}"
		
		if [[ ! -d "$PATCH_OVERLAY" ]]; then
			eend 1
			eerror "PATCH_OVERLAY=$PATCH_OVERLAY is not a dir"
		else
			PATH=$PATH:/usr/sbin:/usr/bin:/bin:/sbin
			autopatch
			eend 0
		fi
	;;
esac