feat: Tell the user to source the config file when instalaltion is do…

…ne (#41)

lib/src/installer/completion_installation.dart

@@ -113,9 +113,13 @@ class CompletionInstallation {
     );
 
     createCompletionConfigDir();
-    writeCompletionScriptForCommand(rootCommand);
+    final completionFileCreated = writeCompletionScriptForCommand(rootCommand);
     writeCompletionConfigForShell(rootCommand);
     writeToShellConfigFile(rootCommand);
+
+    if (completionFileCreated) {
+      _logSourceInstructions(rootCommand);
+    }
   }
 
   /// Create a directory in which the completion config files shall be saved.
@@ -150,8 +154,10 @@ class CompletionInstallation {
   /// The file will be created in [completionConfigDir].
   ///
   /// If the file already exists, it will do nothing.
+  ///
+  /// Returns true if the file was created, false otherwise.
   @visibleForTesting
-  void writeCompletionScriptForCommand(String rootCommand) {
+  bool writeCompletionScriptForCommand(String rootCommand) {
     final configuration = this.configuration!;
     final completionConfigDirPath = completionConfigDir.path;
     final commandScriptName = '$rootCommand.${configuration.name}';
@@ -170,10 +176,12 @@ class CompletionInstallation {
         'A script file for $rootCommand was already found on '
         '$commandScriptPath.',
       );
-      return;
+      return false;
     }
 
     scriptFile.writeAsStringSync(configuration.scriptTemplate(rootCommand));
+
+    return true;
   }
 
   /// Adds a reference for the command-specific config file created on
@@ -265,6 +273,21 @@ class CompletionInstallation {
     );
   }
 
+  /// Tells the user to source the shell configuration file.
+  void _logSourceInstructions(String rootCommand) {
+    final level = logger.level;
+    logger
+      ..level = Level.info
+      ..info(
+        '\n'
+        'Completion files installed. To enable completion, run the following '
+        'command in your shell:\n'
+        '${lightCyan.wrap('source $_shellRCFilePath')}'
+        '\n',
+      )
+      ..level = level;
+  }
+
   void _sourceScriptOnFile({
     required File configFile,
     required String scriptName,

test/src/install/completion_installation_test.dart → test/src/installer/completion_installation_test.dart

@@ -14,6 +14,7 @@ void main() {
 
   setUp(() {
     logger = MockLogger();
+    when(() => logger.level).thenReturn(Level.quiet);
     tempDir = Directory.systemTemp.createTempSync();
   });
 
@@ -145,11 +146,11 @@ void main() {
 
         expect(configFile.existsSync(), false);
 
-        installation
-          ..createCompletionConfigDir()
-          ..writeCompletionScriptForCommand('very_good');
+        installation.createCompletionConfigDir();
+        var result = installation.writeCompletionScriptForCommand('very_good');
 
         expect(configFile.existsSync(), true);
+        expect(result, true);
 
         expect(
           configFile.readAsStringSync(),
@@ -166,7 +167,9 @@ void main() {
           ),
         );
 
-        installation.writeCompletionScriptForCommand('very_good');
+        result = installation.writeCompletionScriptForCommand('very_good');
+
+        expect(result, false);
 
         verify(
           () => logger.warn(
@@ -286,6 +289,17 @@ void main() {
 
           installation.install('very_good');
 
+          verify(() => logger.level = Level.info).called(1);
+
+          verify(
+            () => logger.info(
+              '\n'
+              'Completion files installed. To enable completion, run the '
+              'following command in your shell:\n'
+              'source ${path.join(tempDir.path, '.zshrc')}\n',
+            ),
+          ).called(1);
+
           reset(logger);
 
           // install again
@@ -321,6 +335,17 @@ void main() {
               '${path.join(tempDir.path, '.zshrc')}.',
             ),
           ).called(1);
+
+          verifyNever(() => logger.level = Level.debug);
+
+          verifyNever(
+            () => logger.info(
+              '\n'
+              'Completion files installed. To enable completion, run the '
+              'following command in your shell:\n'
+              'source ${path.join(tempDir.path, '.zshrc')}\n',
+            ),
+          );
         },
       );