Merge pull request #87 from leoafarias/feature/force-flag

Feature/force flag

README.md

@@ -70,8 +70,24 @@ You can use different Flutter SDK versions per project. To do that you have to g
 > fvm use <version>
 ```
 
+**Set Global Version**
+
 If you want to use a specific version by default in your machine, you can specify the flag `--global` to the `use` command. A symbolic link to the Flutter version will be created in the `fvm` home folder, which you could then add to your PATH environment variable as follows: `FVM_HOME/default/bin`. Use `fvm use --help`, this will give you the exact path you need to configure.
 
+```bash
+> fvm use <version> --global
+```
+
+**Force Flag**
+
+Fvm only allows to call the use command on Flutter projects. However if you want to call the `use` command on a non-flutter directory use the `--force` flag.
+
+If you are starting a new project and plan on using `fvm flutter create` you wil have to use the `--force` flag
+
+```bash
+> fvm use <version> --force
+```
+
 ### Remove a SDK Version
 
 Using the remove command will uninstall the SDK version locally, this will impact any projects that depend on that version of the SDK.

lib/commands/use.dart

@@ -23,12 +23,18 @@ class UseCommand extends Command {
         help:
             'Sets version as the global version.\nMake sure Flutter PATH env is set to: $kDefaultFlutterPath',
         negatable: false,
+      )
+      ..addFlag(
+        'force',
+        help: 'Skips command guards that does Flutter project checks.',
+        negatable: false,
       );
   }
 
   @override
   Future<void> run() async {
-    final useGlobally = argResults['global'] == true;
+    final isGlobal = argResults['global'] == true;
+    final isForced = argResults['force'] == true;
     final version = argResults.rest[0];
 
     if (argResults.rest.isEmpty) {
@@ -37,12 +43,12 @@ class UseCommand extends Command {
     // Make sure is valid Flutter version
     final flutterVersion = await inferFlutterVersion(version);
     // If project use check that is Flutter project
-    if (!useGlobally) Guards.isFlutterProject();
+    if (!isGlobal && !isForced) Guards.isFlutterProject();
 
     // Make sure version is installed
     await checkAndInstallVersion(flutterVersion);
 
-    if (useGlobally) {
+    if (isGlobal) {
       // Sets version as the global
       setAsGlobalVersion(flutterVersion);
     } else {

lib/utils/guards.dart

@@ -10,7 +10,8 @@ class Guards {
   static void isFlutterProject() {
     final isFlutter = kLocalProjectPubspec.existsSync();
     if (!isFlutter) {
-      throw Exception('Run this FVM command at the root of a Flutter project');
+      throw Exception(
+          'Run this FVM command at the root of a Flutter project or use --force to bypass this.');
     }
   }