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README.md
# pumpify Combine an array of streams into a single duplex stream using [pump](https://github.com/mafintosh/pump) and [duplexify](https://github.com/mafintosh/duplexify). If one of the streams closes/errors all streams in the pipeline will be destroyed. ``` npm install pumpify ``` [](http://travis-ci.org/mafintosh/pumpify) ## Usage Pass the streams you want to pipe together to pumpify `pipeline = pumpify(s1, s2, s3, ...)`. `pipeline` is a duplex stream that writes to the first streams and reads from the last one. Streams are piped together using [pump](https://github.com/mafintosh/pump) so if one of them closes all streams will be destroyed. ``` js var pumpify = require('pumpify') var tar = require('tar-fs') var zlib = require('zlib') var fs = require('fs') var untar = pumpify(zlib.createGunzip(), tar.extract('output-folder')) // you can also pass an array instead // var untar = pumpify([zlib.createGunzip(), tar.extract('output-folder')]) fs.createReadStream('some-gzipped-tarball.tgz').pipe(untar) ``` If you are pumping object streams together use `pipeline = pumpify.obj(s1, s2, ...)`. Call `pipeline.destroy()` to destroy the pipeline (including the streams passed to pumpify). ### Using `setPipeline(s1, s2, ...)` Similar to [duplexify](https://github.com/mafintosh/duplexify) you can also define the pipeline asynchronously using `setPipeline(s1, s2, ...)` ``` js var untar = pumpify() setTimeout(function() { // will start draining the input now untar.setPipeline(zlib.createGunzip(), tar.extract('output-folder')) }, 1000) fs.createReadStream('some-gzipped-tarball.tgz').pipe(untar) ``` ## License MIT ## Related `pumpify` is part of the [mississippi stream utility collection](https://github.com/maxogden/mississippi) which includes more useful stream modules similar to this one.