Need rust installed to install via the trust lib

[praveenperera]

install.sh: ERROR need rustc (command not found)

this will work without rust: https://gist.github.com/sjparkinson/327dc78c60ab81a06c946630b4288910

But there is a problem with mktemp on linux #9

I really like the idea of using NPM for distributing binaries. Trust works really well for automating the creation of binaries. But I think we should use a node script to download the releases. I'm running into the same issue trying to distribute rustywind

[praveenperera]

Update I'm downloading the release using this script: https://github.com/avencera/rustywind-npm/blob/master/install.js

And I add the bin line to my package.json:
https://github.com/avencera/rustywind-npm/blob/master/package.json#L20

Doing this means the the binary will be remove during npm uninstall -g or yarn global remove

You also need an empty file that will be replaced with the binary: https://github.com/avencera/rustywind-npm/blob/master/rustywind