$basedir missing on MINGW / Git Bash & cygwin

[coolaj86]

Currently any non-hashbang executable referenced by an npm "bin" will not work on Windows in Git Bash (MINGW) or Cygwin.

This issue is that for "short commands" without a hashbang, $basedir is neglected but, in fact, we still need to have $basedir set in either case.

See https://npm.community/t/globally-installed-package-does-not-execute-in-git-bash-on-windows/9394

[coolaj86]

Workaround

I created a function winpmstall that I used to monkey patch for my own project:
https://git.rootprojects.org/root/pathman/src/branch/master/npm/scripts/fetch-prebuilt.js#L36

(WiNPMstall being a terrible portmanteau of Windows NPM Install)