Add checksum.sh script that checks a port or ports for broken distfiles and

gives a diff of any port with broken distfiles, if the distfile names are
the same.  This script will help keep more ports' up-to-date distfiles on
ftp.FreeBSD.org.

PR:		18723
Submitted by:	Alexander Langer <alex@cichlids.com>

Tools/scripts/README

@@ -45,3 +45,8 @@ NOTE: These scripts need work and are *NOT* safe to use unless you know
       what they do.  Use at your own risk.  Patches would be great, but
       I'd prefer they pass through me.
 
+----------------------------------------------------------------------
+
+checksum is a script that allows checking of ports to see if their checksums
+match, and if they don't, give a diff against the older version to try and
+discover why the checksum didn't match.

Tools/scripts/checksum.sh

@@ -0,0 +1,61 @@
+#!/bin/sh
+
+if [ -z $1 ]; then
+	echo "Usage: $0 <portname>"
+	exit 1
+fi
+
+if [ -z $TMPDIR ]; then
+	TMPDIR=/tmp
+fi
+if [ -z $PORTSDIR ]; then
+	PORTSDIR=/usr/ports
+fi
+
+cd $PORTSDIR
+DIR=`grep $1 INDEX| cut -f2 -d\|`
+cd $DIR
+
+make fetch
+broken=`make checksum 2>&1 | grep "Checksum mismatch for" | awk '{print $5}' \
+	| sed -e 's:\.$::'`
+
+if [ -z $broken ]; then
+	make checksum
+	echo "Checksum ok, exiting..."
+	exit 1
+fi
+
+rm -rf $TMPDIR/checksum
+mkdir $TMPDIR/checksum
+cd $TMPDIR/checksum
+mkdir $TMPDIR/checksum/orig
+mkdir $TMPDIR/checksum/new
+
+echo Fetching $broken
+fetch ftp://ftp.FreeBSD.ORG/pub/FreeBSD/distfiles/$broken
+
+if [ ! -r $broken ]; then
+	echo "File $broken not found, fetch error?"
+	exit 1
+fi
+
+if file $broken | grep "gzip compressed data" >/dev/null; then
+	cd orig
+	tar -zxf ../$broken
+	cd ../new
+	tar -zxf $PORTSDIR/distfiles/$broken
+	cd ..
+elif file $broken | grep "zip archive file" >/dev/null ; then
+	cd orig
+	unzip ../$broken
+	cd ../new
+	unzip $PORTSDIR/distfiles/$broken
+	cd ..
+else
+	cp $broken orig/
+	cp $PORTSDIR/distfiles/$broken new/
+fi
+
+echo Diff follows:
+diff -rNu orig new