#!/bin/sh

# print out patch status.  Usage: pstatus [ patchfile ... ]
#
# Stephen Cameron <steve.cameron@hp.com>
#

. patchfns >/dev/null || . /usr/lib/patch-scripts/patchfns >/dev/null || { \
	echo "Impossible to find my library 'patchfns'."
	echo "Check your install, or go to the right directory"
	exit 1
}

if [ ! -f ./series ]
then
	echo "./series does not exist." 1>&2
	exit 1
fi

if [ ! -d ./patches ]
then
	echo "Directory ./patches does not exist." 1>&2
	exit 1
fi


PATCHLIST="$*"
if [ "$PATCHLIST" = "" ]
then
	series_optimize=yes
	PATCHLIST=`cat series | sed -e 's/[.]patch[ 	]*$//'`
	SORTSERIES=`mktemp /tmp/ser.XXXXXX` || exit 1 
	SORTPATCHES=`mktemp /tmp/pat.XXXXXX` || exit 1
	sed -e 's/^[ 	]//' -e 's/[.]patch[ 	]*$//' < series | \
		sort > $SORTSERIES 
	exists="`echo $P/patches/*.patch 2>/dev/null`"
	if [ "$exists" != "$P/patches/*.patch" ]
	then
		ls -1 $P/patches/*.patch | sed -e 's/^.*\/patches\///' \
			-e 's/[.]patch[ 	]*$//' | sort > $SORTPATCHES
		PATCHLIST="$PATCHLIST"" `comm -1 -3 $SORTSERIES $SORTPATCHES`"
	fi
	rm -f $SORTPATCHES $SORTSERIES
else
	series_optimize=no
fi

NSERIES=`wc -l series | awk '{ print $1; }'`
series=1
for PATCH_NAME in $PATCHLIST 
do
	PATCH_NAME=$(stripit $PATCH_NAME)
	# see if this patch even exists
	if [ ! -f $P/patches/"$PATCH_NAME".patch ]
	then
		echo "$PATCH_NAME does not exist."
		continue
	fi
	# see if this patch is applied
	applied="-"
	if [ -f applied-patches ]
	then 
		grep '^'"$PATCH_NAME"'$' applied-patches > /dev/null
		if [ "$?" = "0" ]
		then
			applied="a"
		fi
	fi

	# figure the status of this patch, that is, 
	# if it needs changelog, pcpatch, refpatch

	stat=""
	if [ ! -f $P/txt/"$PATCH_NAME".txt ]
	then
		stat="changelog "
	fi
	if [ ! -f $P/pc/"$PATCH_NAME".pc ]
	then
		stat="$stat""pcpatch "
	elif [ "$applied" != '-' ]
	then
		rpatch=n

		# for each file this patch touches
		for y in `cat $P/pc/"$PATCH_NAME".pc`
		do
			# is the patch adding the file?
			if [ ! -e "$y"'~'"$PATCH_NAME" -a -f "$y" ]
			then
				# file is newer than the patch?
				if [ "$y" -nt $P/patches/"$PATCH_NAME".patch ]
				then
					rpatch=y
					stat="$stat""refpatch "
					break
				fi
			else
				# modified file is newer than the patch?
				if [ "$y"'~'"$PATCH_NAME" -nt \
					$P/patches/"$PATCH_NAME".patch ]
				then
					rpatch=y
					stat="$stat""refpatch "
					break
				fi
				if [ "`toppatch`" = "$PATCH_NAME" -a \
					"$y" -nt $P/patches/"$PATCH_NAME".patch ]
				then
					# toppatch, so check if the file 
				        # is newer than the patch?
					rpatch=y
					stat="$stat""refpatch "
					break
				fi
			fi
		done
	fi
	# check if they changed the changelog recently
	if [ "$rpatch" = "n" -a -f $P/txt/"$PATCH_NAME".txt \
		-a $P/txt/"$PATCH_NAME".txt -nt \
		$P/patches/"$PATCH_NAME".patch ]
	then
		rpatch=y
		stat="$stat""refpatch "
	fi
	if [ "$stat" != "" ]
	then
		stat="Needs ""$stat"
	fi

	if [ "$series_optimize" != "yes" ]
	then
		# have to find the series number the hard way.
		series=`grep -n '^'"$PATCH_NAME"'\.patch$' series |\
			awk -F: '{ printf "%d", $1}' `
		if [ "$series" = "" ]
		then
			series="?"
		fi
	fi

	echo "$series":"$applied":"$PATCH_NAME $stat"

	if [ "$series_optimize" = "yes" ]
	then
		if [ "$series" != "?" ]
		then
			series=`expr $series + 1`
			if [ $series -gt $NSERIES ]
			then 
				series="?"
			fi
		fi
	fi
done