Initial commit

.gitignore

+node_modules

index.js

+const { readFileSync } = require('fs');
+const { merge } = require('lodash');
+
+
+module.exports = function (filenames, logger) {
+  const configs = filenames
+    .map(filename =>loadAndParseFile(filename, logger || console))
+    .filter(string => string !== null);
+
+  if (!configs.length) {
+    throw new Error(`Failed to read each of these config files: ${filenames.join(', ')}`);
+  }
+
+  return merge(configs[0], ...configs.slice(1));
+};
+
+function loadAndParseFile (filename, logger) {
+  let string;
+  try {
+    string = readFileSync(filename, 'utf8');
+  } catch (error) {
+    logger.warn(`Warning: can't read config file ${filename}. ${error.message}`);
+    return null;
+  }
+
+  try {
+    return JSON.parse(string);
+  } catch (error) {
+    throw new Error(`Failed to parse config file ${filename}. ${error.message}`);
+  }
+}

package.json

+{
+  "name": "read-config",
+  "version": "1.0.0",
+  "description": "Simple config-reader function",
+  "main": "index.js",
+  "private": true,
+  "dependencies": {
+    "lodash": "4.17.4"
+  }
+}