configurable/lib/dotenv/dotenv.dart

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library dotenv;
import 'dart:io';
import 'package:meta/meta.dart';
// load functions from parser
part 'dotenv_parser.dart';
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// create in-memory variables store
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var _env = Map<String, String>.from(Platform.environment);
// move from platforms env with default vars
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Map<String, String> get env => _env;
// clean the env and set default from platform environment
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Map clean() => _env = Map.from(Platform.environment);
// check the variables that defined in .env or platform env
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bool isEveryDefined(Iterable<String> vars) =>
vars.every((k) => _env[k] != null && (_env[k]?.isNotEmpty ?? false));
// load file .env from project root
void load([String filename = '.env', DotenvParser psr = const DotenvParser()]) {
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var file = File.fromUri(Uri.file(filename));
var lines = _verify(file);
_env.addAll(psr.parse(lines));
}
// verify file .env
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List<String> _verify(File file) {
if (file.existsSync()) return file.readAsLinesSync();
stderr.writeln('[dotenv] Load failed: file not found: $file');
return [];
}