A node library, command line tool and webapp to provide "pipe-able" Unix-Style data transformations on row-based data like CSVs.

DataPipes offers unix-style cut, grep, sed operations on row-based data like CSVs in a streaming, connectable "pipe-like" manner.

DataPipes can be used:

• Online at http://datapipes.okfnlabs.org/
• Via a command line interface - see below
• As a Node JS library - see below

Install

npm install -g datapipes

Usage - Command line

Once installed, datapipes will be available on the command line:

datapipes -h

See the help for usage instructions, but to give a quick taster:

# head (first 10 rows) of this file
datapipes https://raw.github.com/datasets/browser-stats/master/data.csv head

# search for occurrences of London (ignore case) and show first 10 results
datapipes https://raw.github.com/rgrp/dataset-gla/master/data/all.csv "grep -i london" head

Usage - Library

See the Developer Docs.

Developers

Installation

This is a Node Express application. To install and run do the following.

1. Clone this repo
2. Change into the repository base directory
3. Run:

$ npm install

Testing

Once installed, you can run the tests locally with:

$ make test

Running

To start the app locally, it’s:

$ node app.js

You can then access it from http://localhost:5000/

Deployment

For deployment we use Heroku.

The primary app is called datapipes on Heroku. To add it as a git remote, do:

$ heroku git:remote -a datapipes

Then to deploy:

$ git push datapipes

Inspirations and Related

• https://github.com/substack/dnode dnode is an asynchronous rpc system for node.js that lets you call remote functions. You can pass callbacks to remote functions, and the remote end can call the functions you passed in with callbacks of its own and so on. It's callbacks all the way down!

Copyright and License

Copyright 2013-2014 Open Knowledge Foundation and Contributors.

Licensed under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.