'use strict';
var mdeps = require('module-deps'),
fs = require('fs'),
path = require('path'),
babelify = require('babelify'),
concat = require('concat-stream'),
moduleFilters = require('../../lib/module_filters');
/**
* Returns a readable stream of dependencies, given an array of entry
* points and an object of options to provide to module-deps.
*
* This stream requires filesystem access, and thus isn't suitable
* for a browser environment.
*
* @param {Array<string>} indexes paths to entry files as strings
* @param {Object} options optional options passed
* @param {Function} callback called with (err, inputs)
* @returns {undefined} calls callback
*/
function dependencyStream(indexes, options, callback) {
var md = mdeps({
filter: function (id) {
return !!options.external || moduleFilters.internalOnly(id);
},
transform: [babelify.configure({
sourceMap: false,
stage: 0
})],
postFilter: moduleFilters.externals(indexes, options)
});
indexes.forEach(function (index) {
md.write(path.resolve(index));
});
md.end();
md.once('error', function (error) {
return callback(error);
});
md.pipe(concat(function (inputs) {
callback(null, inputs.map(function (input) {
// un-transform babelify transformed source
input.source = fs.readFileSync(input.file, 'utf8');
return input;
}));
}));
}
module.exports = dependencyStream;
|