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