Regex-pipe NPM

regex-pipe

A transformation piping tool based on regex.

Installation

This module is available on npm:

$ npm install regex-pipe

Examples

Parsing

The following example will show how to transform the content of a file to another.

const Pipe = require('regex-pipe');

const regex = /(blue|red|yellow)/;
const transformation = matches => 'I have a ' + matches[1] + ' house\n';

new Pipe('./in.txt', './out.txt')
   .parse(regex, transformation, { delimiter: Pipe.DELIMITERS.LINE_BY_LINE })
   .then(() => {
      // Now the out.txt file contains the output...
   })
   .catch(err => {
      // An error happened...
   });

Considering the in.txt content as:

They have a blue house
They have a red house
They have a yellow house

After the execution, the out.txt content will be:

I have a blue house
I have a red house
I have a yellow house

In other words, the Pipe.parse will replace every chunk of data with the return of the transformation function

Replacing

The following example will show how to replace the content of a file to another.

const Pipe = require('regex-pipe');

const regex = /blue/;
const replacement = 'red';

new Pipe('./in.txt', './out.txt')
   .replace(regex, replacement, { delimiter: Pipe.DELIMITERS.LINE_BY_LINE })
   .then(() => {
      // Now the out.txt file contains the output...
   })
   .catch(err => {
      // An error happened...
   });

Considering the in.txt content as: