https://github.com/zoubin/writable-stream-stack

make a node stream pipeline, new transforms can be pushed to apply before the data reaches the dest stream
https://github.com/zoubin/writable-stream-stack

Last synced: 8 days ago
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make a node stream pipeline, new transforms can be pushed to apply before the data reaches the dest stream

• Host: GitHub
• URL: https://github.com/zoubin/writable-stream-stack
• Owner: zoubin
• Created: 2015-05-29T02:54:34.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-06-20T01:03:41.000Z (over 9 years ago)
• Last Synced: 2024-04-25T17:44:08.973Z (7 months ago)
• Language: JavaScript
• Size: 145 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# writable-stream-stack

Make a node stream pipeline. New transforms can be pushed to apply before the data reaches the dest stream

## Usage

```javascript

var Stack = require('writable-stream-stack');

```

### ws = Stack(dest)

### ws = Stack(tr1, tr2,..., dest)

### ws = Stack([tr1, tr2,..., dest])

`ws` is a `Writable` stream, and each chunk written in will reach the writable `dest`, before handled by the transform pipeline `tr1, tr2,...`

### ws.on('done', cb)

`ws` fires `done` after `dest` has finished.

### ws.push(tr)

Add transform `tr` to the very beginning of the pipeline.

### ws.pop()

Delete the first transform from the pipeline.

## Example

```javascript

var fs = require('fs');

var vfs = require('vinyl-fs');

var path = require('path');

var Stack = require('writable-stream-stack');

var source = require('vinyl-source-stream');

var DEST = path.join(__dirname, 'files');

var dest = createDestStream('b.js', DEST)

fs.createReadStream(path.join(__dirname, 'files/a.js'))

    .pipe(dest);

dest.on('done', function () {

    fs.createReadStream(path.join(DEST, 'b.js'))

        .pipe(process.stdout);

});

function createDestStream(filename, dir) {

    return Stack(

        source(filename),

        vfs.dest(dir)

    );

}

```

a.js:

```javascript

module.exports = function () {

    console.log('a');

};

```

output:

```

module.exports = function () {

    console.log('a');

};

```