[Modules] Module display crashes because of undefined environment variable

[Mathieu D. <md...@ge...>]

Dear list,

I have a very limited knowledge on environment modules so pardon my 
ignorance.

In several of our modules, we copy the EXEDIR of a module in another 
environment variable (this is needed):

   module load dep/1.0.0
   setenv MY_VAR "$env(DEP_EXEDIR)"

(sometimes without the quotes but I think it doesn't change much).

I can load the module without problems but other commands fail 
(`display`, `search`, maybe others) because then DEP_EXEDIR doesn't 
exists in the environment.

I haven't found much in the doc but according to a discussion thread 
from March 2012 (see 
https://sourceforge.net/p/modules/mailman/modules-interest/thread/4F656C23.5020700%40lakata.org/#msg28999371), 
one way to do this is:

   module load dep/1.0.0
   setenv MY_VAR [getenv DEP_EXEDIR]

However, the thread contains some variations: `get_env` instead of 
`getenv`, no need of [], etc. Can somebody tell me what is the correct 
form ?

Thanks in advance,
Mathieu

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Mathieu Dubois - IR - UMR 8030 équipe LABGeM
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