BOSSdir seems limited to 80 characters or fewer

[therealchrisneale]

• This is a feature request to allow BOSSdir to be longer than 80 characters. Not sure if the issue is in BOSS or LigParGen (command-line version)

Issue Information

BOSS version 4.9 (unpacked from boss0615.tar.gz)

$ LigParGen -h
usage: LigParGen [-h] [-r RESNAME] [-s SMILES] [-m MOL] [-p PDB]
[-o {0,1,2,3}] [-c {0,-1,1,-2,2}] [-l]

Ligand Parameter Generator Based on 
Jorgensen group's OPLS-AA/CM1A(-LBCC) FF
Created on Mon Feb 15 15:40:05 2016
@author: Leela S. Dodda [email protected]
@author: William L. Jorgensen Lab 

Description of the issue

We think that the BOSS binary is interpreting the environment variable $BOSSdir as a string with a limited length (possibly ~80 characters) and that this leads to crashes when the absolute path to the BOSS program is deep. Specifically, what we have noticed is that when BOSS is installed in a location with a long absolute path, the BOSS call fails with an error message about “ERROR ENCOUNTERED WHILE OPENING A FILE IN GETUNITS” when $BOSSdir is set as an absolute path, but we can get the call to succeed when $BOSSdir is set as a relative (and therefore in this case shorter) path.