[HTCondor-users] Are file paths in the config macros strings or expressions?

[Marco Mambelli <marcom@xxxxxxxx>]

Greetings,
I'm not sure what is the correct way to handle file paths (e.g. the one to the singularity binary) in the condor config macros
Should they be strings (quoted) or expressions (left unquoted)?

In a specific case I have a variable, SINGULARITY_PATH that contains the path to the singularity binary.
So I'd like to define SINGULARITY using that variable:
SINGULARITY = $(SINGULARITY_PATH)

Should it be:
SINGULARITY_PATH = "/my path that can have spaces/singularity"
or
SINGULARITY_PATH = /my path that can have spaces/singularity
?

It seems that the quotes are causing problems, are interpreted literally:
'"/cvmfs/oasis.opensciencegrid.org/mis/singularity/bin/singularity" --version' did not exit successfully (code 11018); the first line of output was ''

But I'm not sure the path w/o quotes would be protected against corner cases in the file path (spaces, unusual characters)

Any advice?

Thanks,
Marco