penumbra-watch

Install

npm install --save penumbra-watch

Or if you are working locally, but don't want penumbra-watch as a dependency.

npm install --save-dev penumbra-watch

Usage

Install penumbra, and vinyl-fs to do this example.

var pen = require('penumbra')(),
    //Make sure to pass the pen instance into the penumbra watch function.
    watch = require('penumbra-watch')(pen),
    fs = require('vinyl-fs');


pen.task('move', function * (){
    console.log('moving files');
    yield [
        fs.src(['./*.js']),
        map(log),
        fs.dest('./output')
    ];
});

watch('.', {
    cwd: process.cwd()
}, 'move');

watch can also be simply called as:

watch('.', 'move', 'anotherTask');

or

watch('.', function(){

}, /*... more functions, or penumbra tasks.*/);

Interface

require('penumbra-watch')(pen) -> watch

Pass a penumbra instance to the pen argument to use tasks in the watch constructor.

If you don't you can still use a callback, but you won't be able to use tasks directly in the watch function.

watch(files, options, callback|task, ..., task) -> chokidar watcher

files can be one of these:

• file name
• file glob
• array of file names, or globs

options are the same as chokidar.

The rest of the arguments can be a callback, or a task string.

penumbra tasks will be run before callbacks.

Look at chokidar to learn more.

Use with a callback

var pen = require('penumbra')(),
    watch = require('penumbra-watch')(pen),
    fs = require('vinyl-fs');


pen.task('move', function * (){
    console.log('moving files');
    yield [
        fs.src(['./*.js']),
        map(log),
        fs.dest('./output')
    ];
});

watch('.', {
    cwd: process.cwd()
}, function(){
    console.log('ready to move');
    pen.exec('move').then(function(){
        console.log('done moving');
    });
});

Use with browser-sync

var bs = require('browser-sync').create(),
    reload = bs.reload,
    pen = require('penumbra')(),
    watch = require('penumbra-watch')(pen);

pen.task('serve', function * (){
    bs.init({server: '.'});
    //Here callback functions, and penumbra tasks are mixed.
    watch('.', reload, 'anotherTask', console.log.bind(console));
});

pen.task('anotherTask', function * (){
    /*This task is run before the reload callback.*/
    console.log('anotherTask is running');
    /*... Do some stuff here.*/
});

About

Use this module with penumbra.

If you would like a similar, but different interface then gulp-watch will also work with penumbra. chokidar itself will also work quite well.

penumbra-watch is just a little module to help decrease the code to start a file watcher using penumbra.