add support for npm #30

[oooooooo]

Hi, I’ve made it compatible with npm install.

You can publish it using make npm.
( It works on Linux but not on Mac/BSD. Feel free to discard it. )

Once you merge, I will remove my test package from npm:
https://www.npmjs.com/package/@noooooooode/has

[kdabir]

The problem is once we distribute it via npm, it may be installed by users on Windows as well and then that can open floodgate of windows compatibility issues. I am open to more ideas on how to address this (ease of distribution vs OS compatibility). For Mac/Linux, we are already publishing to homebrew for easier installation. https://formulae.brew.sh/formula/has

[goto-dev-null]

Forgive my ignorance but isn't npm for.....node packages? Shipping a bash script that has 0 node.js code associated with it feels really weird to me, and kind of just poluting npm's package registry. It makes about as much sense as (somehow) creating a Rust crate for it.

The whole appeal of has, to me, is that it is a self-contained bash script that performs simple yet very helpful functionality.

What I would suggest instead is make has compatible with tools that install binaries from Github Releases, like eget or distillery. Because doesn't need to be compiled for each individual platform, I think the level of effort on that would be pretty small, but I can't say for sure.