Nodejs terminal script problematic cygwin paths of arguments - cannot make an universal script

I have an issue with using node.js as a script language in the Cygwin terminal. The script is used not only on Cygwin, but also on other platforms like OS X or GNU/Linux (no issue there).

Local or absolute path arguments to the script are passed as Cygwin paths (example: /cygdrive/c/Users/username/Dir/some-file.txt), but node requires Windows path (example: C:\Users\username\Dir\some-file.txt).

There is a tool cygpath that is used to translate between the two, but because of the multiplatform requirement, I cannot hardcode them. I would not like to make any bash wrappers so I can keep it a one file script.

For example this would work: ./script $(cygpath -w /tmp/file), but I cannot require the users of the script to put cygpath every time they want to use it.

Node is installed as the windows binary and is invoked with a shabang: #!/usr/bin/env node. which nodejs yields /cygdrive/c/Program Files/nodejs/node.

TL;DR: is there any sane and portable way to trigger automatic path translation in Cygwin for arguments of a nodejs script?

via Krzysztof Bociurko