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Comment by PeCaN | Hacker News Reader

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

Ignoring the obvious stupidity here, why does it invoke Ruby only to invoke curl?

That's not what it's doing. It's downloading Ruby code and then running it. The "$(...)" is evaluated first.

It curls the install script, which is passed to ruby as a string which is run.

Ah, duh, you're right. I forgot $() is bash syntax and not the Ruby syntax for running an external command. Thanks, and yikes.

Because the install script is in ruby?