Merge pull request rust-lang#1035 from bitjson/docs/homebrew-completions

Add bash completion guidance for macOS users

Author: brson

README.md

@@ -66,6 +66,9 @@ gist is as simple as using one of the following:
 # Bash
 $ rustup completions bash > /etc/bash_completion.d/rustup.bash-completion
 
+# Bash (macOS/Homebrew)
+$ rustup completions bash > $(brew --prefix)/etc/bash_completion.d/rustup.bash-completion
+
 # Fish
 $ rustup completions fish > ~/.config/fish/completions/rustup.fish
 

src/rustup-cli/help.rs

@@ -162,6 +162,13 @@ r"DISCUSSION:
     This installs the completion script. You may have to log out and
     log back in to your shell session for the changes to take affect.
 
+    BASH (macOS/Homebrew):
+
+    Homebrew stores bash completion files within the Homebrew directory.
+    With the `bash-completion` brew formula installed, run the command:
+
+    `rustup completions bash > $(brew --prefix)/etc/bash_completion.d/rustup.bash-completion`
+
     FISH:
 
     Fish completion files are commonly stored in