'use strict';
var stream = require('stream');
var util = require('util');
var replace = require('./replace');
var jsonExtRe = /\.json$/;
module.exports = function(rootEnv) {
rootEnv = rootEnv || process.env;
return function (file, trOpts) {
if (jsonExtRe.test(file)) {
return stream.PassThrough();
}
var envs = trOpts ? [rootEnv, trOpts] : [rootEnv];
return new LooseEnvify(envs);
};
};
function LooseEnvify(envs) {
stream.Transform.call(this);
this._data = '';
this._envs = envs;
}
util.inherits(LooseEnvify, stream.Transform);
LooseEnvify.prototype._transform = function(buf, enc, cb) {
this._data += buf;
cb();
};
LooseEnvify.prototype._flush = function(cb) {
var replaced = replace(this._data, this._envs);
this.push(replaced);
cb();
};