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More information about what homebrew is all about: http://github.com/mxcl/homebrew
There is 1 alternative - vote for the best!
As of March 7, 2012:
brew update - downloads upgraded formulas
brew upgrade [FORMULA...] - upgrades the specified formulas
brew outdated - lists outdated installations
Note updating all packages may take an excruciatingly long time. You might consider a discriminating approach: run `brew outdated` and select specific packages needing an upgrade.
For more information see homebrew's git repository: https://github.com/mxcl/homebrew
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I believe this command will re-install all packages, not just ones with updates.
This page recommends a better one: http://www.charlietanksley.net/philtex/update-on-homebrew/
brew update && brew install `brew outdated`Yes, you're right, it tries to install all packages that are installed, but for packages that don't have an update you get something like
"Warning: Formula already installed: tmux"
"brew outdated" was added after I posted the command here (16 days to be precise :), but it is surely the way to go now.
brew install `outdated` >> "Error: something already installed"`brew upgrade` seems to be the proper way now (see alternative.)
brew update && brew upgrade already does this now. `brew outdated` is no longer needed.