index.js
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module.exports = RcLoader;
var path = require('path');
var _ = require('lodash');
var RcFinder = require('rcfinder');
function RcLoader(name, userConfig, finderConfig) {
if (!(this instanceof RcLoader))
return new RcLoader(name, userConfig, finderConfig);
if (!name)
throw new TypeError('Specify a name for your config files');
finderConfig = _.isObject(finderConfig) ? finderConfig : {};
var config = {};
var configPending = false;
var lookup = userConfig && userConfig.lookup !== void 0 ? !!userConfig.lookup : true;
var finder = new RcFinder(name, finderConfig);
if (typeof userConfig === 'string') {
lookup = false;
config.defaultFile = userConfig;
} else {
_.assign(config, userConfig || {});
}
if (config.defaultFile) {
if (finder.canLoadSync) {
_.assign(config, finder.get(config.defaultFile));
} else {
// push callbacks here that need to wait for config to load
configPending = [];
// force the async loader
finder.get(config.defaultFile, function (err, defaults) {
if (err) throw err;
_.assign(config, defaults);
// clear the configPending queue
var cbs = configPending;
configPending = null;
cbs.forEach(function (cb) { cb(); });
});
}
}
// these shouldn't be a part of the final config
delete config.defaultFile;
delete config.lookup;
// get the config for a file
this.for = function (filename, cb) {
var sync = typeof cb !== 'function';
function respond(err, configFile) {
if (err && !sync) return cb(err);
// the config has not loaded yet, delay our response
// until it is
if (!sync && configPending) {
return configPending.push(function () {
respond(err, configFile);
});
}
configFile = _.assign(configFile || {}, config);
if (sync) return configFile;
cb(void 0, configFile);
}
if (!lookup) {
if (sync) return respond();
return process.nextTick(respond);
}
if (sync) return respond(null, finder.find(path.dirname(filename)));
finder.find(path.dirname(filename), respond);
};
}