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pipes

pipes is a clean and powerful stream processing library that lets you build and connect reusable streaming components.

Quick start

Then fire up ghci:

$ ghci
Prelude> import Pipes
Prelude Pipes> import qualified Pipes.Prelude as P

... and echo standard input to standard output until you enter quit.

Prelude Pipes P> runEffect $ P.stdinLn >-> P.takeWhile (/= "quit") >-> P.stdoutLn
Test[Enter]
Test
Apple[Enter]
Apple
quit[Enter]
Prelude P> -- Done!

To learn more, read the pipes tutorial.

Features

Philosophy

The pipes library emphasizes the following three design precepts:

Outline

The core pipes ecosystem consists of the following four libraries:

These represent the core areas that I envision for pipes. The latter three libraries represent the more pragmatic face of the ecosystem and make design tradeoffs where there is no known elegant solution.

Derived libraries that build on top of these include:

Development Status

Build Status

pipes is stable, and current work focuses on packaging pipes for various package managers. The long term goal is to get pipes into the Haskell platform and become the basic building block for streaming APIs.

Community Resources

How to contribute

License (BSD 3-clause)

Copyright (c) 2012-2014 Gabriella Gonzalez All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.