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index.js
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index.js
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var path = require('path');
var parcelMap = require( 'parcel-map' );
var shasum = require( 'shasum' );
var through2 = require( 'through2' );
var path = require( 'path' );
var _ = require( 'underscore' );
var async = require( 'async' );
var glob = require( 'glob' );
var Package = require( './lib/package' );
var Parcel = require( './lib/parcel' );
var inherits = require( 'inherits' );
var log = require( 'npmlog' );
var EventEmitter = require('events').EventEmitter;
var Package = require('./lib/package.js');
module.exports = Parcelify;
inherits( Parcelify, EventEmitter );
function Parcelify( browserifyInstance, options ) {
var _this = this;
if( ! ( this instanceof Parcelify ) ) return new Parcelify( browserifyInstance, options );
options = _.defaults( {}, options, {
bundles : {}, // ignored when bundlesByEntryPoint is provided
bundlesByEntryPoint : undefined, // required when there are multiple entry points
appTransforms : undefined,
appTransformDirs : undefined,
watch : undefined,
logLevel : undefined,
// used internally or in order to share packages between multiple parcelify instances
existingPackages : undefined
} );
// option aliases
if( _.isUndefined( options.bundles.style ) ) options.bundles.style = options.o || 'bundle.css';
if( _.isUndefined( options.appTransforms ) ) options.appTransforms = options.t || [];
if( _.isUndefined( options.appTransformDirs ) ) options.appTransformDirs = options.d || [];
if( _.isUndefined( options.watch ) ) options.watch = options.w || false;
if( _.isUndefined( options.logLevel ) ) options.logLevel = options.l;
if( _.isString( options.appTransforms ) ) options.appTransforms = [ options.appTransforms ];
this.watching = false;
if( options.logLevel ) log.level = options.logLevel;
// before we jump the gun, return from this function so we can listen to events from the calling function
process.nextTick( function() {
var existingPackages = options.existingPackages || {};
var mappedAssets = {};
_this.on( 'error', function( err ) {
log.error( '', err ); // otherwise errors kill our watch task. Especially bad for transform errors
} );
if( options.watch ) {
browserifyInstance.on( 'update', _.debounce( function( changedMains ) {
_this.watching = true;
var processParcelOptions = _.clone( options );
processParcelOptions.existingPackages = existingPackages;
processParcelOptions.mappedAssets = mappedAssets;
_this.processParcels( browserifyInstance, processParcelOptions, function( err ) {
if( err ) _this.emit( 'error', err );
} );
}, 1000, true ) );
}
var processParcelOptions = _.clone( options );
processParcelOptions.existingPackages = existingPackages;
processParcelOptions.mappedAssets = mappedAssets;
_this.processParcels( browserifyInstance, processParcelOptions, function( err ) {
if( err ) _this.emit( 'error', err );
} );
} );
return _this;
}
Parcelify.prototype.processParcels = function( browserifyInstance, options, callback ) {
var _this = this;
var existingPackages = options.existingPackages || {};
var assetTypes;
if( options.bundlesByEntryPoint ) {
assetTypes = _.reduce( options.bundlesByEntryPoint, function( assetTypesMemo, bundlesForThisEntryPoint ) {
return _.union( assetTypesMemo, _.keys( bundlesForThisEntryPoint ) );
}, [] )
} else assetTypes = _.keys( options.bundles );
var packages = _.reduce( existingPackages, function( memo, thisPackage, thisPackageId ) {
memo[ thisPackage.path ] = thisPackage.package;
return memo;
}, {} );
var dependencies = _.reduce( existingPackages, function( memo, thisPackage, thisPackageId ) {
memo[ thisPackage.path ] = _.map( thisPackage.dependencies, function( thisDependency ) { return thisDependency.path; } );
return memo;
}, {} );
var parcelMapEmitter = parcelMap( browserifyInstance, {
keys : assetTypes,
files : options.mappedAssets,
packages : packages,
dependencies : dependencies
} );
parcelMapEmitter.on( 'error', function( err ) {
return callback( err );
} );
parcelMapEmitter.on( 'done', function( parcelMapResult ) {
_this.instantiateParcelAndPackagesFromMap( parcelMapResult, existingPackages, assetTypes, options.appTransforms, options.appTransformDirs, function( err, packagesThatWereCreated ) {
if( err ) return callback( err );
var parcelsThatWereCreated = [];
process.nextTick( function() {
async.series( [ function( nextSeries ) {
// fire package events for any new packages
_.each( packagesThatWereCreated, function( thisPackage ) {
var isParcel = thisPackage.isParcel;
log.verbose( 'Created new ' + ( isParcel ? 'parcel' : 'package' ) + ' ' + thisPackage.path + ' with id ' + thisPackage.id );
existingPackages[ thisPackage.id ] = thisPackage;
if( isParcel ) {
_this._setupParcelEventRelays( thisPackage );
parcelsThatWereCreated.push( thisPackage );
}
thisPackage.on( 'error', function( err ) {
_this.emit( 'error', err );
} );
_this.emit( 'packageCreated', thisPackage );
} );
nextSeries();
}, function( nextSeries ) {
if( parcelsThatWereCreated.length > 1 && ! options.bundlesByEntryPoint ) {
return nextSeries( new Error( 'Multiple entry points detected, but bundlesByEntryPoint option was not supplied.' ) );
}
if( parcelsThatWereCreated.length === 1 && ! options.bundlesByEntryPoint ) {
options.bundlesByEntryPoint = {};
options.bundlesByEntryPoint[ _.first( parcelsThatWereCreated ).mainPath ] = options.bundles;
}
// we are done copying packages and collecting our asset streams. Now write our bundles to disk.
async.each( _.values( packagesThatWereCreated ), function( thisParcel, nextEach ) {
if( ! thisParcel.isParcel ) return nextEach();
var thisParcelBundles = options.bundlesByEntryPoint[ thisParcel.mainPath ];
async.each( Object.keys( thisParcelBundles ), function( thisAssetType, nextEach ) {
var thisBundlePath = thisParcelBundles[ thisAssetType ];
if( ! thisBundlePath ) return nextEach();
thisParcel.writeBundle( thisAssetType, thisBundlePath, function( err, bundleWasWritten ) {
// don't stop writing other bundles if there was an error on this one. errors happen
// frequently with transforms.. like invalid scss, etc. don't stop the show, just
// keep going with our other bundles.
if( err ) _this.emit( 'error', err );
else if( bundleWasWritten ) _this.emit( 'bundleWritten', thisBundlePath, thisAssetType, thisParcel, _this.watching );
nextEach();
} );
}, nextEach );
}, nextSeries );
}, function( nextSeries ) {
if( options.watch ) {
// we only create glob watchers for the packages that parcel added to the manifest. Again, we want to avoid doubling up
// work in situations where we have multiple parcelify instances running that share common bundles
_.each( packagesThatWereCreated, function( thisPackage ) {
thisPackage.createWatchers( assetTypes, browserifyInstance._options.packageFilter, options.appTransforms, options.appTransformDirs );
if( thisPackage.isParcel ) {
thisPackage.attachWatchListeners( options.bundlesByEntryPoint[ thisPackage.mainPath ] );
}
} );
}
if( ! _this.watching ) _this.emit( 'done' );
nextSeries();
} ], callback );
} );
return callback( null );
} );
} );
};
Parcelify.prototype.instantiateParcelAndPackagesFromMap = function( parcelMapResult, existingPacakages, assetTypes, appTransforms, appTransformDirs, callback ) {
var _this = this;
var mappedParcel = null;
var packagesThatWereCreated = {};
async.series( [ function( nextSeries ) {
async.each( Object.keys( parcelMapResult.packages ), function( thisPackageId, nextPackageId ) {
var packageJson = parcelMapResult.packages[ thisPackageId ];
var packageOptions = {};
async.waterfall( [ function( nextWaterfall ) {
Package.getOptionsFromPackageJson( thisPackageId, packageJson.__path, packageJson, assetTypes, appTransforms, appTransformDirs, nextWaterfall );
}, function( packageOptions, nextWaterfall ) {
var thisPackage;
var thisPackageIsAParcel = packageJson.__isParcel;
if( ! existingPacakages[ thisPackageId ] ) {
if( thisPackageIsAParcel ) {
thisPackage = packagesThatWereCreated[ thisPackageId ] = new Parcel( _.extend( packageOptions, { mainPath : packageJson.__mainPath } ) );
}
else thisPackage = packagesThatWereCreated[ thisPackageId ] = new Package( packageOptions );
thisPackage.createAllAssets( assetTypes );
}
else if( thisPackageIsAParcel && ! existingPacakages[ thisPackageId ] instanceof Parcel ) {
// k tricky here.. if this package is a parcel, but it exists in the manifest as a plain
// old package, then we gotta recreate this package as a parcel. also we have to update
// any parcels that are dependENTS of this package/parcel in order to use the new
// assets that we are about to create. man, scary, hope nothing gets broke in the process.
// we could also pre-preemptively list out which packages are parcels by adding an option
// to parcelify itself, but that seems a little weird. In the context of cartero that
// depends on the path of each package relative to the parcelDirs cartero option.
var oldPackage = existingPacakages[ thisPackageId ];
var oldDependentParcels = oldPackage.dependentParcels;
oldPackage.destroy();
thisPackage = packagesThatWereCreated[ thisPackageId ] = new Parcel( packageOptions );
thisPackage.createAllAssets( assetTypes );
oldDependentParcels.forEach( function( thisDependentParcel ) {
thisPackage.addDependentParcel( thisDependentParcel );
thisDependentParcel.calcSortedDependencies();
thisDependentParcel.calcParcelAssets( assetTypes );
} );
log.warn( '', 'Recreated package at ' + thisPackage.path + ' as Parcel.' );
} else
thisPackage = existingPacakages[ thisPackageId ];
nextWaterfall();
} ], nextPackageId );
}, nextSeries );
}, function( nextSeries ) {
var allPackages = _.extend( {}, existingPacakages, packagesThatWereCreated );
// now that we have all our packages instantiated, hook up dependencies
_.each( parcelMapResult.dependencies, function( dependencyIds, thisPackageId ) {
var thisPackage = allPackages[ thisPackageId ];
if( ! thisPackage ) return nextSeries( new Error( 'Unknown package id in dependency ' + thisPackageId ) );
var thisPackageDependencies = _.map( dependencyIds, function( thisDependencyId ) { return allPackages[ thisDependencyId ]; } );
thisPackage.setDependencies( thisPackageDependencies );
} );
// finally, we can calculate the topo sort of any parcels that were created
_.each( packagesThatWereCreated, function( thisParcel ) {
if( thisParcel.isParcel ) {
thisParcel.calcSortedDependencies();
thisParcel.calcParcelAssets( assetTypes );
_.each( thisParcel.sortedDependencies, function( thisDependentPackage ) {
thisDependentPackage.addDependentParcel( thisParcel );
} );
}
} );
nextSeries();
} ], function( err ) {
return callback( err, packagesThatWereCreated );
} );
};
Parcelify.prototype._setupParcelEventRelays = function( parcel ) {
var _this = this;
var eventsToRelay = [ 'assetUpdated', 'packageJsonUpdated' ];
eventsToRelay.forEach( function( thisEvent ) {
parcel.on( thisEvent, function() {
var args = Array.prototype.slice.call( arguments );
_this.emit.apply( _this, [].concat( thisEvent, args ) );
} );
} );
parcel.on( 'bundleUpdated', function( bundlePath, assetType ) {
_this.emit( 'bundleWritten', bundlePath, assetType, parcel, true );
} );
};