1  /// This is copied from Cargokit (which is the official way to use it currently)
 2  /// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
 3  
 4  import 'dart:io';
 5  
 6  extension on String {
 7    String resolveSymlink() => File(this).resolveSymbolicLinksSync();
 8  }
 9  
10  class Environment {
11    /// Current build configuration (debug or release).
12    static String get configuration =>
13        _getEnv("CARGOKIT_CONFIGURATION").toLowerCase();
14  
15    static bool get isDebug => configuration == 'debug';
16    static bool get isRelease => configuration == 'release';
17  
18    /// Temporary directory where Rust build artifacts are placed.
19    static String get targetTempDir => _getEnv("CARGOKIT_TARGET_TEMP_DIR");
20  
21    /// Final output directory where the build artifacts are placed.
22    static String get outputDir => _getEnvPath('CARGOKIT_OUTPUT_DIR');
23  
24    /// Path to the crate manifest (containing Cargo.toml).
25    static String get manifestDir => _getEnvPath('CARGOKIT_MANIFEST_DIR');
26  
27    /// Directory inside root project. Not necessarily root folder. Symlinks are
28    /// not resolved on purpose.
29    static String get rootProjectDir => _getEnv('CARGOKIT_ROOT_PROJECT_DIR');
30  
31    // Pod
32  
33    /// Platform name (macosx, iphoneos, iphonesimulator).
34    static String get darwinPlatformName =>
35        _getEnv("CARGOKIT_DARWIN_PLATFORM_NAME");
36  
37    /// List of architectures to build for (arm64, armv7, x86_64).
38    static List<String> get darwinArchs =>
39        _getEnv("CARGOKIT_DARWIN_ARCHS").split(' ');
40  
41    // Gradle
42    static String get minSdkVersion => _getEnv("CARGOKIT_MIN_SDK_VERSION");
43    static String get ndkVersion => _getEnv("CARGOKIT_NDK_VERSION");
44    static String get sdkPath => _getEnvPath("CARGOKIT_SDK_DIR");
45    static String get javaHome => _getEnvPath("CARGOKIT_JAVA_HOME");
46    static List<String> get targetPlatforms =>
47        _getEnv("CARGOKIT_TARGET_PLATFORMS").split(',');
48  
49    // CMAKE
50    static String get targetPlatform => _getEnv("CARGOKIT_TARGET_PLATFORM");
51  
52    static String _getEnv(String key) {
53      final res = Platform.environment[key];
54      if (res == null) {
55        throw Exception("Missing environment variable $key");
56      }
57      return res;
58    }
59  
60    static String _getEnvPath(String key) {
61      final res = _getEnv(key);
62      if (Directory(res).existsSync()) {
63        return res.resolveSymlink();
64      } else {
65        return res;
66      }
67    }
68  }