module : token expansion in environment

[alalazo]

Modifications:

• fixes [proposal]: Add custom paths/settings to environment modules #1109

Examples

A modules.yaml like :

enable:
  - tcl
tcl: 
  all:
    environment:
    set: 
      '{name}_ROOT': '{prefix}'

will produce a module file with e.g. an HDF5_ROOT variable set to the prefix of any hdf5 installation done.

@trws In the end I maintained separator, as using delim would have required changing a lot of packages.

[alalazo]

@mwilliammyers @tgamblin I think this should solve #1109

[alalazo]

@tgamblin The error seems a false negative... don't know what is going on with Travis today...

[mwilliammyers]

@alalazo Thank you! I meant to do a PR for #1109 but got very busy.