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126 lines
4.9 KiB
Markdown
126 lines
4.9 KiB
Markdown
# Tips N' Tricks
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## Package versions
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The preferred and supported method of installing specific versions of formulae is to use the [Homebrew-versions](https://github.com/Homebrew/homebrew-versions) tap.
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### Installing directly from pull-requests
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You can browse pull requests https://github.com/Homebrew/homebrew/pulls
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and install through the direct link. For example Python 3.3.0 pull request https://github.com/Homebrew/homebrew/pull/15199
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```zsh
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brew install https://raw.github.com/dsr/homebrew/9b22d42f50fcbc5e52c764448b3ac002bc153bd7/Library/Formula/python3.rb
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```
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## Quickly remove something from /usr/local
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```bash
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brew unlink $FORMULA
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```
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This can be useful if a package can't build against the version of something you have linked into `/usr/local`.
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And of course, you can simply `brew link $FORMULA` again afterwards!
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## Install into Homebrew without formulas
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```bash
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./configure --prefix=/usr/local/Cellar/foo/1.2 && make && make install && brew link foo
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```
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## Command tab-completion
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### Bash
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Add to your `~/.bashrc` or `~/.bash_profile` (whichever you have configured to run on shell startup):
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```bash
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source `brew --repository`/Library/Contributions/brew_bash_completion.sh
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```
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### ZSH
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Run in terminal (may require `sudo`):
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```zsh
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ln -s "$(brew --prefix)/Library/Contributions/brew_zsh_completion.zsh" /usr/local/share/zsh/site-functions
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```
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## Pre-downloading a file for a formula
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Sometimes it's faster to download a file via means other than those strategies that are available as part of Homebrew. For example, Erlang provides a Torrent that'll let you download at 4–5× the normal HTTP method. Download the file and drop it in `~/Library/Caches/Homebrew`, but watch the file name. Homebrew downloads files as <code>{{ formula name }}-{{ version }}</code>. In the case of Erlang, this requires renaming the file from <code>otp_src_R13B03</code> to <code>erlang-R13B03</code>.
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**New:**
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```bash
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mv the_tarball `brew --cache formula-name`
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```
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You can also pre-cache the download by using the command `brew fetch formula` which also displays the SHA1 and SHA256 values. This can be useful for updating formulae to new versions.
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## Using Homebrew behind a proxy
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Behind the scenes, Homebrew uses several commands for downloading files (e.g. curl, git, svn). Many of these tools can download via a proxy. It's a common (though not universal) convention for these command-line tools to observe getting the proxy parameters from environment variables (e.g. `http_proxy`). Unfortunately, most tools are inconsistent in their use of these environment parameters (e.g. curl supports `http_proxy`, `HTTPS_PROXY`, `FTP_PROXY`, `GOPHER_PROXY`, `ALL_PROXY`, `NO_PROXY`).
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Luckily, for the majority of cases setting `http_proxy` is enough. You can set this environment variable in several ways (search on the internet for details), but the way I prefer is:
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```bash
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$ http_proxy=http://<proxyhost>:<proxyport> brew install $FORMULA
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```
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### Proxy Authentication
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```bash
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$ http_proxy=http://<user>:<password>@<proxyhost>:<proxyport> brew install $FORMULA
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```
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**NB:** this technique will also work if you prefer to use `sudo` with Homebrew. But as `sudo` clears the environment before executing Homebrew, your proxy settings may get lost.
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**Workaround:**
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```bash
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$ http_proxy=http://<proxyhost>:<proxyport> sudo -E brew install $FORMULA
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```
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## Installing stuff without the Xcode-CLT
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```bash
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$ brew sh # or: eval $(brew --env)
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$ gem install ronn # or c-programs
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```
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This imports the brew environment into your existing shell, gem will pick up the environment variables and be able to build. As a bonus brew's automatically determined optimization flags are set.
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## Install only a formula's dependencies (not the formula)
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```
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brew install --only-dependencies $FORMULA
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```
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## brew irb
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```bash
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$ brew irb
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1.8.7 :001 > Formula.factory("ace").methods - Object.methods
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=> [:install, :path, :homepage, :downloader, :stable, :bottle, :devel, :head, :active_spec, :buildpath, :ensure_specs_set, :url, :version, :specs, :mirrors, :installed?, :explicitly_requested?, :linked_keg, :installed_prefix, :prefix, :rack, :bin, :doc, :include, :info, :lib, :libexec, :man, :man1, :man2, :man3, :man4, :man5, :man6, :man7, :man8, :sbin, :share, :etc, :var, :plist_name, :plist_path, :download_strategy, :cached_download, :caveats, :options, :patches, :keg_only?, :fails_with?, :skip_clean?, :brew, :std_cmake_args, :deps, :external_deps, :recursive_deps, :system, :fetch, :verify_download_integrity, :fails_with_llvm, :fails_with_llvm?, :std_cmake_parameters, :mkdir, :mktemp]
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1.8.7 :002 >
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```
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## Hiding the beer mug emoji when finishing a build
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```bash
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export HOMEBREW_NO_EMOJI=1
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```
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This sets the HOMEBREW_NO_EMOJI environment variable, causing homebrew to hide all emoji.
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## Sublime text: Syntax for formulae including the diff
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In Sublime Text 2/3, you can use Package Control to install [Homebrew-formula-syntax](https://github.com/samueljohn/Homebrew-formula-syntax).
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