[mgunit] Unexpected breakage

[Sean Kelly]

Hi folks:

Our project uses IDL 7.1 and incorporates mgunit 1.0.0 via an svn:external to http://svn.idldev.com/mgunit/tags/mgunit-1.0.0/mgunit/src.

However, a recent svn update also updated the mgunit 1.0.0 external, which was surprising, since tags in svn are usually supposed to be stable, or so I thought.

Now unit tests fail with:

% Attempt to call undefined procedure/function: 'IDL_OBJECT__DEFINE'.
% Execution halted at: MGCOHASHTABLE__DEFINE  728 /.../mgunit/dist_tools/collection/mgcohashtable__define.pro
%                      OBJ_NEW         
%                      MG_OPTIONS::INIT  570 /.../mgunit/dist_tools/mg_options__define.pro
%                      OBJ_NEW         
%                      MGUNIT_WRAPPER     12 /.../mgunit/mgunit_wrapper.pro
%                      $MAIN$          

It turns out that the tagged 1.0.0 of mugunit itself has an svn:external to the trunk of http://svn.idldev.com/dist_tools/trunk/src, which of course as an svn:external to the trunk of http://svn.idldev.com/idllib/trunk/src/collection. So while collections continues to get developed, the tagged mgunit 1.0.0 picks up those changes too.

We worked around this by just adding the distribution file from the Trac site, but in future you might want to do something similar to http://is.gd/bu18q so that tagged trees get specific revisions of externalized trees.

Or something else altogether. I'm an svn noob after all.

Take care,
Sean.
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