#!/bin/sh

# Publish local patches as quilt trees.
#
# Copyright (C) 2008-2011  Jean Delvare <khali@linux-fr.org>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details:
# http://www.gnu.org/copyleft/gpl.html
#
# The latest official version of this script can be found at:
# ftp://ftp.kernel.org/pub/linux/kernel/people/jdelvare/scripts/publish-patches

if [ $# -lt 1 ]
then
	echo "Subsystem?"
	exit 1
fi

if [ ! -d "patches" -o ! -f "Makefile" ]
then
	echo "Invalid working directory"
	exit 1
fi

# Determine the base version
get_base()
{
	local ver0 ver1 ver2 ver3

	ver0=`sed -ne 's/^VERSION[[:space:]]*=[[:space:]]*//p' Makefile`
	ver1=`sed -ne 's/^PATCHLEVEL[[:space:]]*=[[:space:]]*//p' Makefile`
	ver2=`sed -ne 's/^SUBLEVEL[[:space:]]*=[[:space:]]*//p' Makefile`
	ver3=`sed -ne 's/^EXTRAVERSION[[:space:]]*=[[:space:]]*//p' Makefile`

	# Strip sublevel for 3.x kernel series
	if [ "$ver0" = "3" -a "$ver2" = "0" ]
	then
		echo "$ver0.$ver1$ver3"
	else
		echo "$ver0.$ver1.$ver2$ver3"
	fi
}

PUBLIC_ROOT="$HOME/devel/linux/kernel.org/linux-2.6"
BASE=`get_base`
echo "BASE = $BASE"

# Make sure addresses in headers are well-formatted
check_address()
{
	local total good

	total=`grep -c "^$2: " $patch`
	good=`grep -c "^$2: \(.* <.*@.*\..*>\|stable@kernel\.org\( \[.*\]\)\?\)\$" $patch`
	if [ "$total" -ne "$good" ]
	then
		echo "Warning: patch $1 has malformed $2: header."
	fi
}

# Do the real work
publish_subsystem()
{
	local SUBSYSTEM="$1"
	local PUBLIC="$PUBLIC_ROOT/jdelvare-$SUBSYSTEM"

	if [ ! -d "patches/$SUBSYSTEM" ]
	then
		echo "Invalid subsystem: $SUBSYSTEM"
		exit 1
	fi

	echo "Publishing subsystem $SUBSYSTEM"

	# Create directory if needed
	[ -d "$PUBLIC" ] || mkdir -p "$PUBLIC"

	# Delete the old stuff
	rm -f "$PUBLIC"/*

	# Copy the new stuff
	echo "# BASE $BASE" > "$PUBLIC"/series
	sed -e "s/[[:space:]][[:space:]]*#.*//" -ne "s/^$SUBSYSTEM\///p;s/\(NEXT_\(BASE\|PATCHES_START\|PATCHES_END\)\)($SUBSYSTEM)/\1/p" < patches/series >> "$PUBLIC"/series
	chmod 644 "$PUBLIC"/series
	local WARNED=0
	if grep -q '^[^#]' "$PUBLIC"/series
	then
		for patch in "patches/$SUBSYSTEM"/*.patch
		do
			# Check for missing headers
			if ! grep -q '^From: ' $patch
			then
				echo "Warning: patch $patch lacks a From: header."
				WARNED=1
			fi
			if ! grep -q '^Subject: ' $patch
			then
				echo "Warning: patch $patch lacks a Subject: header."
				WARNED=1
			fi
			if ! grep -q '^Signed-off-by: ' $patch
			then
				echo "Warning: patch $patch lacks a Signed-off-by: line."
				WARNED=1
			fi

			# Check for extra headers
			if grep -q '^To: ' $patch
			then
				echo "Warning: patch $patch has extra headers."
				WARNED=1
			fi

			# Check for malformed headers
			check_address $patch 'From'
			check_address $patch 'Cc'
			check_address $patch 'Signed-off-by'
		done
		cp --preserve=timestamps "patches/$SUBSYSTEM"/*.patch "$PUBLIC"
		chmod 644 "$PUBLIC"/*.patch
	fi

	# Make sure that all the files referenced in series, exist
	local ORPHAN=`grep -v -e '^#' -e '\.patch$' "$PUBLIC"/series`
	if [ -n "$ORPHAN" ]
	then
		echo "Warning! Unexpected references in series:"
		echo "$ORPHAN"
		WARNED=1
	fi

	# Create a tarball for easier download
	rm -f "$PUBLIC_ROOT/jdelvare-$SUBSYSTEM.tar.gz"
	tar zcf "$PUBLIC_ROOT/jdelvare-$SUBSYSTEM.tar.gz" -C "$PUBLIC_ROOT" "jdelvare-$SUBSYSTEM"

	# Push everything to kernel.org
	if [ "$WARNED" -ne "1" ]
	then
		rsync -av --delete "$PUBLIC_ROOT/jdelvare-$SUBSYSTEM.tar.gz" "$PUBLIC_ROOT/jdelvare-$SUBSYSTEM" master.kernel.org:people-jdelvare/linux-2.6
	fi
}

for SUBSYSTEM in "$@"
do
	publish_subsystem $SUBSYSTEM
done