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80 lines
3.2 KiB
Markdown
80 lines
3.2 KiB
Markdown
# Taps (Third-Party Repositories)
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`brew tap` adds more repositories to the list of formulae that `brew` tracks, updates,
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and installs from. By default, `tap` assumes that the repositories come from GitHub,
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but the command isn't limited to any one location.
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## The `brew tap` command
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* `brew tap` without arguments lists the currently tapped repositories. For
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example:
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```sh
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$ brew tap
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homebrew/core
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mistydemeo/tigerbrew
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dunn/emacs
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```
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<!-- vale Homebrew.Terms = OFF -->
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<!-- The `terms` lint suggests changing "repo" to "repository". But we need the abbreviation in the tap syntax and URL example. -->
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* `brew tap <user/repo>` makes a clone of the repository at
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https://github.com/user/homebrew-repo. After that, `brew` will be able to work on
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those formulae as if they were in Homebrew's canonical repository. You can
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install and uninstall them with `brew [un]install`, and the formulae are
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automatically updated when you run `brew update`. (See below for details
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about how `brew tap` handles the names of repositories.)
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<!-- vale Homebrew.Terms = ON -->
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* `brew tap <user/repo> <URL>` makes a clone of the repository at URL.
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Unlike the one-argument version, URL is not assumed to be GitHub, and it
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doesn't have to be HTTP. Any location and any protocol that Git can handle is
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fine.
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* `brew tap --repair` migrates tapped formulae from a symlink-based to
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directory-based structure. (This should only need to be run once.)
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* `brew untap user/repo [user/repo user/repo ...]` removes the given taps. The
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repositories are deleted and `brew` will no longer be aware of their formulae.
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`brew untap` can handle multiple removals at once.
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## Repository naming conventions and assumptions
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* On GitHub, your repository must be named `homebrew-something` in order to use
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the one-argument form of `brew tap`. The prefix 'homebrew-' is not optional.
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(The two-argument form doesn't have this limitation, but it forces you to
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give the full URL explicitly.)
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* When you use `brew tap` on the command line, however, you can leave out the
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'homebrew-' prefix in commands.
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That is, `brew tap username/foobar` can be used as a shortcut for the long
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version: `brew tap username/homebrew-foobar`. `brew` will automatically add
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back the 'homebrew-' prefix whenever it's necessary.
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## Formula with duplicate names
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If your tap contains a formula that is also present in
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[homebrew/core](https://github.com/Homebrew/homebrew-core), that's fine,
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but it means that you must install it explicitly by default.
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Whenever a `brew install foo` command is issued, `brew` will find which formula
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to use by searching in the following order:
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* core formulae
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* other taps
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If you need a formula to be installed from a particular tap, you can use fully
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qualified names to refer to them.
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You can create a tap for an alternative `vim` formula. The behaviour will be:
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```sh
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brew install vim # installs from homebrew/core
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brew install username/repo/vim # installs from your custom repository
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```
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As a result, we recommend you give formulae a different name if you want to make
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them easier to install. Note that there is (intentionally) no way of replacing
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dependencies of core formulae with those from taps.
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