Improve release script.

release.sh

@@ -1,7 +1,24 @@
-#!/bin/sh
+#!/bin/bash
 
 # This script packs the relevant files of the LinkTitles
 # extension into two archive files that contain the current
 # git tag as the version number.
 
-tar cvzf release/LinkTitles-`git describe --tags --abbrev=0`.tar.gz gpl-*.txt NEWS LinkTitles.* --exclude '*~' --transform 's,^,LinkTitles/,'
+if [[ -z $1 ]]; then
+	echo "Usage: $(basename $0) VERSION."
+	echo "Missing VERSION!"
+	exit 1
+fi
+
+FILENAME="release/LinkTitles-$1.tar.gz"
+
+# Pack the relevant files into at tarball, renaming the paths to include the
+# root path "LinktTitles".
+tar cvzf $FILENAME gpl-*.txt NEWS LinkTitles.* --exclude '*~' --transform 's,^,LinkTitles/,'
+
+# Add the tarball to the repository, commit it, then tag the commit and push to origin.
+git add $FILENAME
+git commit -m "Release version $1"
+git tag -a $1 -m "Version $1."
+git push
+git push --tags