Fixed: match='re' could produce duplicate test identifiers files.Files.regexp(pattern) now makes sure to return only one metafile for each matching virtual path, namely, the one that would be returned for that virtual path by files.Files.from_virtual_path.

#! /bin/sh

VERSION=`hg identify | awk '{ print $1 }'`
if [ -z "$VERSION" ]
then
	echo The current Mercurial changeset could not be determined. >&2
	exit 1
fi

sed 's/$$REV$\$/hg '"$VERSION/" upreckon-vcs >upreckon
chmod +x upreckon