#!/bin/bash

origwd=$(pwd)

get_field()
{
	grep -v '^#' ../real_control |
		awk -F '	' '$3 == "'$1'" { print $'$2'; }'
}

trees=$(grep -v '^#' ../real_control | awk -F '	' '{ print $3 }')

for name in $trees; do
	type=$(get_field "$name" 2)

	echo $name: $type
	if [ "$type" = "git" ]; then
		git fetch "$name"
		continue
	fi

	if [ "$type" = "quilt" ]; then
		url=$(get_field "$name" 4)

		case "$url" in
		http://kernel.org/*|http://www.kernel.org/*)
			use_rsync=true
			rurl=$(echo "$url" | sed -r 's,^http://(www\.)?kernel\.org,master.kernel.org:,')
			;;
		http://ozlabs.org/~*)
			use_rsync=true
			rurl=$(echo "$url" | sed -r 's,^http://ozlabs\.org/([^/]*),ozlabs.org:\1/public_html,')
			;;
		*)
			use_rsync=false
			;;
		esac
		cd ../quilt || {
			echo "Cannot chdir to ../quilt" 1>&2
			continue
		}
		[ -d "$name" ] || mkdir "$name" || {
			echo "Cannot create quilt directory for $name" 1>&2
			cd "$origwd"
			continue
		}
		cd "$name" || {
			echo "Cannot chdir to quilt directory for $name" 1>&2
			cd "$origwd"
			continue
		}
		if $use_rsync; then
			rsync -avz "$rurl/series" series || {
				echo "rsync of $name series file failed" 1>&2
				cd ..
				rm -rf "$name"
				git checkout "$name"
				cd "$origwd"
				continue
			}
		else
			wget -N -nv --no-cache "$url/series" || {
				echo "Wget of $name series file failed" 1>&2
				cd ..
				rm -rf "$name"
				git checkout "$name"
				cd "$origwd"
				continue
			}
		fi
		find * -type f | grep -v '^series$' | sort >.series.old
		do_echo=echo
		grep -q NEXT_PATCHES series &&
			do_echo=:
		while read line; do
			case "$line" in
			*NEXT_PATCHES_START*)	do_echo=echo ;;
			*NEXT_PATCHES_END*)	do_echo=: ;;
			''|\#*)			: ;;
			*)			$do_echo $line ;;
			esac
		done <series |
			sed -e 's/[ 	]*#.*$//' -e '/^[ 	]*$/d' |
			sort >.series.next
		if $use_rsync; then
			rsync -avz --files-from .series.next "$rurl" . || {
				echo "rsync of series '$name' failed" 1>&2
				cd ..
				rm -rf "$name"
				git checkout "$name"
				cd "$origwd"
				continue
			}
		else
			wget -N -nv --no-cache -B "$url" -i .series.next || {
				echo "Wget of series '$name' failed" 1>&2
				cd ..
				rm -rf "$name"
				git checkout "$name"
				cd "$origwd"
				continue
			}
		fi
		comm -23 .series.old .series.next | xargs -r rm -f
		rm -f .series.old .series.next
		cd "$origwd"
	fi
done

cd ../quilt
git add .
git commit -v -a -m "$(date '+%F-%H:%M')" -e

exit 0