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labeled-stream-splicer

stream splicer with labels

build status

example

Here's an example that exposes a label for deps and pack:

var splicer = require('labeled-stream-splicer');
var through = require('through2');
var deps = require('module-deps');
var pack = require('browser-pack');
var lstream = require('lstream');

var pipeline = splicer.obj([
    'deps', [ deps() ],
    'pack', [ pack({ raw: true }) ]
]);

pipeline.get('deps').unshift(lstream());

pipeline.get('deps').push(through.obj(function (row, enc, next) {
    row.source = row.source.toUpperCase();
    this.push(row);
    next();
}));

process.stdin.pipe(pipeline).pipe(process.stdout);

Here the deps sub-pipeline is augmented with a post-transformation that uppercases its source input.

methods

var splicer = require('labeled-stream-splicer')

The API is the same as stream-splicer, except that pipeline.get(), pipeline.splice(), and pipeline.indexOf() can accept string labels in addition to numeric indexes.

var pipeline = splicer(streams, opts)

Create a pipeline duplex stream given an array of streams. Each stream will be piped to the next. Writes to pipeline get written to the first stream and data for reads from pipeline come from the last stream.

To signify a label, a stream may have a .label property or a string may be placed in the streams array.

For example, for streams [ a, 'foo', b, c, 'bar', d ], this pipeline is constructed internally:

a.pipe(b).pipe(c).pipe(d)

with a label 'foo' that points to b and a label 'bar' that points to d. If a or c has a .label property, that label would be used for addressing.

Input will get written into a. Output will be read from d.

If any of the elements in streams are arrays, they will be converted into nested labeled pipelines. This is useful if you want to expose a hookable pipeline with grouped insertion points.

var pipeline = splicer.obj(streams, opts)

Create a pipeline with opts.objectMode set to true for convenience.

var removed = pipeline.splice(index, howMany, stream, ...)

Splice the pipeline starting at index, removing howMany streams and replacing them with each additional stream argument provided.

The streams that were removed from the splice and returned.

index can be an integer index or a label.

pipeline.push(stream, ...)

Push one or more streams to the end of the pipeline.

The stream arguments may have a label property that will be used for string lookups.

var stream = pipeline.pop()

Pop a stream from the end of the pipeline.

pipeline.unshift(stream, ...)

Unshift one or more streams to the begining of the pipeline.

The stream arguments may have a label property that will be used for string lookups.

var stream = pipeline.shift()

Shift a stream from the begining of the pipeline.

var stream = pipeline.get(index)

Return the stream at index index.

index can be an integer or a string label.

install

With npm do:

npm install labeled-stream-splicer

license

MIT

# labeled-stream-splicer

[stream splicer](https://npmjs.org/package/stream-splicer) with labels

[![build status](https://secure.travis-ci.org/substack/labeled-stream-splicer.png)](http://travis-ci.org/substack/labeled-stream-splicer)

# example

Here's an example that exposes a label for `deps` and `pack`:

``` js
var splicer = require('labeled-stream-splicer');
var through = require('through2');
var deps = require('module-deps');
var pack = require('browser-pack');
var lstream = require('lstream');

var pipeline = splicer.obj([
    'deps', [ deps() ],
    'pack', [ pack({ raw: true }) ]
]);

pipeline.get('deps').unshift(lstream());

pipeline.get('deps').push(through.obj(function (row, enc, next) {
    row.source = row.source.toUpperCase();
    this.push(row);
    next();
}));

process.stdin.pipe(pipeline).pipe(process.stdout);
```

Here the `deps` sub-pipeline is augmented with a post-transformation that
uppercases its source input.

# methods

``` js
var splicer = require('labeled-stream-splicer')
```

The API is the same as
[stream-splicer](https://npmjs.org/package/stream-splicer),
except that `pipeline.get()`, `pipeline.splice()`, and `pipeline.indexOf()` can
accept string labels in addition to numeric indexes.

## var pipeline = splicer(streams, opts)

Create a `pipeline` duplex stream given an array of `streams`. Each `stream`
will be piped to the next. Writes to `pipeline` get written to the first stream
and data for reads from `pipeline` come from the last stream.

To signify a label, a stream may have a `.label` property or a string may be
placed in the `streams` array.

For example, for streams `[ a, 'foo', b, c, 'bar', d ]`, this pipeline is
constructed internally:

```
a.pipe(b).pipe(c).pipe(d)
```

with a label `'foo`' that points to `b` and a label `'bar'` that points to `d`.
If `a` or `c` has a `.label` property, that label would be used for addressing.

Input will get written into `a`. Output will be read from `d`.

If any of the elements in `streams` are arrays, they will be converted into
nested labeled pipelines. This is useful if you want to expose a hookable
pipeline with grouped insertion points.

## var pipeline = splicer.obj(streams, opts)

Create a `pipeline` with `opts.objectMode` set to true for convenience.

## var removed = pipeline.splice(index, howMany, stream, ...)

Splice the pipeline starting at `index`, removing `howMany` streams and
replacing them with each additional `stream` argument provided.

The streams that were removed from the splice and returned.

`index` can be an integer index or a label.

## pipeline.push(stream, ...)

Push one or more streams to the end of the pipeline.

The stream arguments may have a `label` property that will be used for string
lookups.

## var stream = pipeline.pop()

Pop a stream from the end of the pipeline.

## pipeline.unshift(stream, ...)

Unshift one or more streams to the begining of the pipeline.

The stream arguments may have a `label` property that will be used for string
lookups.

## var stream = pipeline.shift()

Shift a stream from the begining of the pipeline.

## var stream = pipeline.get(index)

Return the stream at index `index`.

`index` can be an integer or a string label.

# install

With [npm](https://npmjs.org) do:

```
npm install labeled-stream-splicer
```

# license

MIT
# Change User Description Committed
#1 19553 swellard Move and rename clients
//guest/perforce_software/helix-web-services/main/source/clients/2016.1.0/javascript/node_modules/labeled-stream-splicer/readme.markdown
#1 18810 tjuricek First-pass at JavaScript client SDK.

JavaScript requires Node with Gulp to "browserfy" the library. It's the easiest way I found to use the swagger-js project; bundle up a wrapping method.

There is no JavaScript reference guide. The swagger-js doesn't really document what they do very well, actually.

Overall I'm not particularly impressed by swagger-js, it was hard to even figure out what the right method syntax was. We may want to invest time in doing it better.

This required setting CORS response headers, which are currently defaulted to a fairly insecure setting.