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shrine-medco/shrine-webclient/src/main/html/node_modules/liftoff/lib/find_config.js
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find_config.js
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			const fs = require('fs');
			const path = require('path');
			const fileSearch = require('./file_search');

			module.exports = function (opts) {
			opts = opts \|\| {};
			var configNameSearch = opts.configNameSearch;
			var configPath = opts.configPath;
			var searchPaths = opts.searchPaths;
			// only search for a config if a path to one wasn't explicitly provided
			if (!configPath) {
			if (!Array.isArray(searchPaths)) {
			throw new Error('Please provide an array of paths to search for config in.');
			}
			if (!configNameSearch) {
			throw new Error('Please provide a configNameSearch.');
			}
			configPath = fileSearch(configNameSearch, searchPaths);
			}
			// confirm the configPath exists and return an absolute path to it
			if (fs.existsSync(configPath)) {
			return path.resolve(configPath);
			}
			return null;
			};