how to get version information on title slide with org beamer

[Eric S Fraga <esflists@gmail.com>]

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Hello all,

I know I can use {{{modification-time(...,t)}}} say to get the revision
control system information about when the repository was last
modified.  However, I would like to have other information (e.g. the
mercurial id).  More importantly, I would like this information to
appear on my beamer export title slide.

I have tried

#+date: \copyright {{{time(%Y)}}}, version src_shell{hg id --num}

for instance but babel blocks are not executed for these
lines.  Putting this text in a macro doesn't help either.

Any suggestions?

Thanks,
eric

-- 
: Eric S Fraga via Emacs 26.0.50, Org release_9.0.9-796-gbae41a

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