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docs: update shell completions instructions

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Rylan Polster 2021-01-08 11:26:33 -05:00
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docs/Shell-Completion.md
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@ -4,7 +4,9 @@ Homebrew comes with completion definitions for the `brew` command. Some packages
`zsh`, `bash` and `fish` are currently supported.
You must configure your shell to enable its completion support. This is because the Homebrew-managed completions are stored under `HOMEBREW_PREFIX` which your system shell may not be aware of, and since it is difficult to automatically configure `bash` and `zsh` completions in a robust manner, the Homebrew installer does not do it for you.
Shell completions for built-in Homebrew commands are not automatically installed. To opt-in to using our completions, they need to be linked to `HOMEBREW_PREFIX` by running `brew completions link`.
You must then configure your shell to enable its completion support. This is because the Homebrew-managed completions are stored under `HOMEBREW_PREFIX` which your system shell may not be aware of, and since it is difficult to automatically configure `bash` and `zsh` completions in a robust manner, the Homebrew installer does not do it for you.
## Configuring Completions in `bash`