Add ~checkchangelog.sh, to make slackpkg check-updates faster

root/usr/libexec/slackpkg/functions.d/~checkchangelog.sh

@@ -0,0 +1,32 @@
+eval _$(typeset -f checkchangelog)
+
+checkchangelog() {
+	if ! [ -e ${ROOT}/${WORKDIR}/CHECKSUMS.md5.asc ]; then
+		touch ${ROOT}/${WORKDIR}/CHECKSUMS.md5.asc
+	fi
+
+	# First we will download CHECKSUMS.md5.asc since it is a very small
+	# file and if it has not changed, we can know that the ChangeLog
+	# has not changed either. If it _has_ changed, we'll need to pull
+	# the ChangeLog to check that as well.
+	echo -e "\tDownloading..."
+	getfile ${SOURCE}CHECKSUMS.md5.asc $TMPDIR/CHECKSUMS.md5.asc
+	if ! grep -q "PGP" $TMPDIR/CHECKSUMS.md5.asc ; then
+		echo -e "\
+\nError downloading from $SOURCE.\n\
+Please check your mirror and try again."
+		cleanup
+	fi
+	if diff --brief ${ROOT}/${WORKDIR}/CHECKSUMS.md5.asc $TMPDIR/CHECKSUMS.md5.asc ; then
+		# Before returning with the result that these signatures (and
+		# therefore the ChangeLog) are the same, we need to copy the
+		# ChangeLog into ${TMPDIR} in case the user decides to
+		# "download all other files":
+		cp ${ROOT}/${WORKDIR}/ChangeLog.txt $TMPDIR/ChangeLog.txt
+		return 0
+	fi
+	# CHECKSUMS.md5.asc was different, so we'll go on to download and test
+	# the full ChangeLog.txt.
+
+	_checkchangelog "$@"
+}

root/usr/libexec/slackpkg/functions.d/~looknew.sh

@@ -1,5 +1,4 @@
 looknew() {
-
 	# with ONLY_NEW_DOTNEW set, slackpkg will search only for
 	# .new files installed in actual slackpkg's execution
 	if [ "$ONLY_NEW_DOTNEW" = "on" ]; then