While using subversion the LaTeX sources of the documentation files used
$date$ to include the revision and date of the Cactus version for which the documentation was built. Git does not (in any useful manner) support these types of tags, yet it would be good to have some indication of when documentation was built and to which Cactus version it applies.
\today to include the date the documentation was build (not the date of the last commit the way subversion would have done) and the git hash of the current
HEAD (ie the version of Cactus checked out).
It is a pure LaTeX solution so works with (at this point) with both the PDF and the HTML docs when generated through the makefile and also when running pdflatex directly on