Bypassing prompt (to press return) in homebrew install script

问题

Very simple script that installs homebrew:

  #!/bin/bash

  ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

The output gives:

==> This script will install:
/usr/local/bin/brew
/usr/local/Library/...
/usr/local/share/man/man1/brew.1

Press RETURN to continue or any other key to abort

How do I press enter in a script like this? Would expect be the best route?

回答1:

Reading the source of https://raw.github.com/Homebrew/homebrew/go/install -- it only prompts if stdin is a TTY. If you redirect stdin from /dev/null, it won't prompt at all. So:

ruby \
  -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" \
  </dev/null

回答2:

This is what yes is for:

yes '' | ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

回答3:

Press enter 

if it asks to press return key

For more clarity of this,get hold of the brew docs

https://docs.brew.sh/

回答4:

Per the lead maintainer of Homebrew:

echo | ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

回答5:

This works fine for me,

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null

来源：https://stackoverflow.com/questions/25535407/bypassing-prompt-to-press-return-in-homebrew-install-script