mirror of
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c96ef68294
Using format JSBIN_[KEY]_[KEY]=whatever
for example the following config setting:
{
"url": {
"host": "localhost:3300"
}
}
can be overriden with the following environment variable set
JSBIN_URL_HOST=my.url.com
82 lines
2.7 KiB
JavaScript
82 lines
2.7 KiB
JavaScript
var fs = require('fs'),
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path = require('path'),
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existsSync = fs.existsSync || path.existsSync, // yeah folks, have some of that.
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localconfig = path.resolve(__dirname, '..', 'config.local.json');
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if (!process.env.JSBIN_CONFIG && process.argv[2]) {
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process.env.JSBIN_CONFIG = process.argv[2];
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}
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// If a custom config is passed in, resolve its path
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if (process.env.JSBIN_CONFIG) {
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localconfig = path.resolve(process.cwd(), process.env.JSBIN_CONFIG);
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}
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// Loads the configuration options from the config.*.json files.
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//
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// By default load the contents of config.default.json, these keys can be
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// over-ridden by providing a user config.local.json file with any keys that
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// you wish to override.
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//
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// Environment variables will then overwrite any default or local config settings
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// Environment variables must follow the format JSBIN_[KEY_UCASE]_[KEY_UCASE]
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// (note that all keys are upper cased and all non alpha numberic chars are replaced with _)
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// for example the following config setting:
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// {
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// "url": {
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// "host": "localhost:3300"
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// }
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// }
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// can be overriden with the following environment variable set
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// JSBIN_URL_HOST=my.url.com
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//
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//
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// It is also possible to define your own config file by passing an absolute
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// path to the file as the JSBIN_CONFIG environment variable.
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//
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// Example:
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//
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// $ JSBIN_CONFIG=/path/to/config.js jsbin
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var config = require('../config.default.json');
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function deepExtend(target, object) {
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Object.getOwnPropertyNames(object).forEach(function (key) {
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var value = object[key];
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if (typeof value === "object" && value !== null && !Array.isArray(value)) {
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target[key] = deepExtend(target[key] || {}, value);
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} else {
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target[key] = value;
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}
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});
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return target;
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}
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if (existsSync(localconfig)) {
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deepExtend(config, require(localconfig));
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}
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function importEnvVars(collection, envPrefix) {
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Object.getOwnPropertyNames(collection).forEach(function (key) {
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var value = collection[key],
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envKey = envPrefix + '_' + key.toUpperCase().replace(/[^a-z0-9_]+/gi,'_'),
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envValue = process.env[envKey];
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if ((typeof(value) == 'number') || (typeof(value) == 'string') || (typeof(value) == 'boolean') || (value == null)) {
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if (envValue && typeof(envValue == 'string')) {
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if (envValue.match(/\s*(true|on)\s*/i)) {
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envValue = true;
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} else if (envValue.match(/\s*(false|off)\s*/i)) {
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envValue = false;
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}
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collection[key] = envValue;
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console.log(' environment variable ' + envKey + '=' + envValue + ' used for config');
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}
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} else if (value && (typeof(value) == 'object') && (key != 'reserved')) {
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importEnvVars(value, envKey);
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}
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});
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}
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importEnvVars(config, 'JSBIN');
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module.exports = config; |