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What is tup?

Tup is a file-based build system for Linux, OSX, and Windows. It inputs a list of file changes and a directed acyclic graph (DAG), then processes the DAG to execute the appropriate commands required to update dependent files. Updates are performed with very little overhead since tup implements powerful build algorithms to avoid doing unnecessary work. This means you can stay focused on your project rather than on your build system.

Get tup

Git Repository

$ git clone git://github.com/gittup/tup.git
$ cd tup
tup$ ./bootstrap.sh
tup$ man ./tup.1

Windows

Linux Ubuntu

If you don't want to install tup from the git tree, you can use the unofficial tup PPA repository that works for Debian-based distributions (e.g. Ubuntu 10.04+).

sudo apt-add-repository 'deb http://ppa.launchpad.net/anatol/tup/ubuntu precise main'
sudo apt-get update
sudo apt-get install tup

MacOSX

If you use the Homebrew package manager you can install tup as follows:

brew install tup

If you use MacPorts install tup as:

sudo port install tup

Why tup?

You can use tup anywhere you would use another build system (like make, or any of its derivatives). One reason you would want to use tup is if you like to update things very quickly. For example, if you typically execute a build in a subdirectory because it takes too long to figure out what to do when you execute the build from the top, you might want to look into tup. Unfortunately, tup is so fast that your chair mounted jousting might suffer. I apologize in advance if someone besmirches your honor and you are unable to properly defend yourself as a result.

Wha tup?

Nothing much, just writing some web pages. What's up with you?

Why is it so awesome?

What this means is:

How is it so awesome?

In a typical build system, the dependency arrows go down. Although this is the way they would naturally go due to gravity, it is unfortunately also where the enemy's gate is. This makes it very inefficient and unfriendly. In tup, the arrows go up. This is obviously true because it rhymes. See how the dependencies differ in make and tup:

Make
Tup

See the difference? The arrows go up. This makes it very fast. In fact, in at least one case, tup is optimal. See the Build System Rules and Algorithms (PDF) paper for more detailed information.