"port info boost" should give more clues about whereabouts in svn

[dave@…]

I'm trying to find out how to install a back rev of boost. I gather from

​https://trac.macports.org/wiki/howto/InstallingOlderPort

that I have to go to

​https://trac.macports.org/browser/trunk/dports

and find the boost port, then craft an svn command to get the old version, something like:

svn co -r 30810 ​http://svn.macports.org/repository/macports/trunk/dports/lang/tcl

But where exactly is boost? It's not at the top level? No. Is it under devel? No. I used the search box, and that was not helpful.

I did this:

Z% sudo /opt/local/bin/port info boost boost @1.53.0, Revision 1 (devel) Variants: debug, [+]no_single, [+]no_static, openmpi, python25, python26, [+]python27, python31, python32, python33, regex_match_extra, universal

Description: Boost provides free portable peer-reviewed C++ libraries. The emphasis is on portable libraries which work well with the C++ Standard Library. Homepage: ​http://www.boost.org

Library Dependencies: zlib, expat, bzip2, libiconv, icu, python27 Platforms: darwin License: Boost-1 Maintainers: adfernandes@…

but there is nothing there to help me find the subfolder in the svn repository that contains boost.

I'm stumped.