On Fri, Dec 23, 2016 at 08:11:15AM +1100, Sean Crosby wrote:
> I've taken to using /usr/bin/env a bit more because of the max length
> limit in shebang lines. We store newer versions of Ruby, Python etc
> on a separate filesystem, where there are many versions of these
> directories, and they are hidden down quite far in the dirtree. So we
> regularly hit the max shebang length limit of 128 characters.

that's one of the things that symlinks are for.

e.g. I have python2.6, 2.7, 3.1, 3.2, 3.4, and 3.5 all installed in
/usr/bin, with symlinks python & python2 pointing to 2.7, and python3
pointing to 3.5

python scripts have either a specific versioned binary name in the #!
line or just #!/usr/bin/python or #!/usr/bin/python2 for the latest
python 2.x or #!/usr/bin/python3 for the latest python 3.x. at some
point in the future, python3 will become the default python and
/usr/bin/python will point to it.