Validate that the project or solution argument is not a mistyped option

src/Commands/FormatCommandCommon.cs

@@ -99,6 +99,8 @@ static FormatCommandCommon()
             VerbosityOption.AcceptOnlyFromAmong(VerbosityLevels);
             BinarylogOption.AcceptLegalFilePathsOnly();
             ReportOption.AcceptLegalFilePathsOnly();
+            SlnOrProjectArgument.AcceptLegalFilePathsOnly();
+            SlnOrProjectArgument.PathIsNotOptionLike();
         }
 
         internal static async Task<int> FormatAsync(FormatOptions formatOptions, ILogger<Program> logger, CancellationToken cancellationToken)
@@ -152,6 +154,37 @@ public static CliArgument<string> DefaultToCurrentDirectory(this CliArgument<str
             return arg;
         }
 
+        public static CliArgument<T> PathIsNotOptionLike<T>(this CliArgument<T> arg)
+        {
+            // Hyphens are valid path characters so options that exist in other subcommands or don't
+            // exist at all will be considered valid values for the ProjectOrSolution argument.
+            // This validator ensures that we show the user an "unrecognized command" message when
+            // they mistype or misuse options.
+
+            arg.Validators.Add(symbol =>
+            {
+                // Look at each token. In practice this should be a single token since the
+                // ProjectOrSolution argument accepts at most one value.
+                foreach (var token in symbol.Tokens)
+                {
+                    // If the path looks like an option and doesn't look like a relative path, ensure
+                    // a folder exists with the same name.
+                    if (token.Value.StartsWith('-') &&
+                        !token.Value.Contains('\\') &&
+                        !token.Value.Contains('/'))
+                    {
+                        var path = Path.GetFullPath(token.Value, Environment.CurrentDirectory);
+                        if (!Directory.Exists(path))
+                        {
+                            symbol.AddError(string.Format(Resources.Unrecognized_command_or_argument_0, token.Value));
+                        }
+                    }
+                }
+            });
+
+            return arg;
+        }
+
         public static ILogger<Program> SetupLogging(this IConsole console, LogLevel minimalLogLevel, LogLevel minimalErrorLevel)
         {
             var loggerFactory = new LoggerFactory()

src/Resources.resx

@@ -360,6 +360,9 @@
   <data name="Run_whitespace_formatting" xml:space="preserve">
     <value>Run whitespace formatting.</value>
   </data>
+  <data name="Unrecognized_command_or_argument_0" xml:space="preserve">
+    <value>Unrecognized command or argument '{0}'</value>
+  </data>
   <data name="A_space_separated_list_of_diagnostic_ids_to_ignore_when_fixing_code_style_or_3rd_party_issues" xml:space="preserve">
     <value>A space separated list of diagnostic ids to ignore when fixing code style or 3rd party issues.</value>
   </data>

src/xlf/Resources.cs.xlf

@@ -387,6 +387,11 @@
         <target state="translated">Nepovedlo se uspořádat importy pro {0}. Dokument je příliš složitý.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">Používá se MSBuild.exe umístěný v {0}.</target>

src/xlf/Resources.de.xlf

@@ -387,6 +387,11 @@
         <target state="translated">Importe für "{0}" können nicht organisiert werden. Das Dokument ist zu komplex.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">MSBuild.exe in "{0}" wird verwendet.</target>

src/xlf/Resources.es.xlf

@@ -387,6 +387,11 @@
         <target state="translated">No se pueden organizar las importaciones para "{0}". El documento es demasiado complejo.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">Se está usando el archivo MSBuild.exe ubicado en "{0}".</target>

src/xlf/Resources.fr.xlf

@@ -387,6 +387,11 @@
         <target state="translated">Impossible d'organiser les importations pour '{0}'. Le document est trop complexe.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">Utilisation de MSBuild.exe dans '{0}'.</target>

src/xlf/Resources.it.xlf

@@ -387,6 +387,11 @@
         <target state="translated">Non è possibile organizzare le importazioni per '{0}'. Il documento è troppo complesso.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">Verrà usata la versione di MSBuild.exe disponibile in '{0}'.</target>

src/xlf/Resources.ja.xlf

@@ -387,6 +387,11 @@
         <target state="translated">'{0}' のインポートを整理できません。ドキュメントが複雑すぎます。</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">'{0}' にある MSBuild.exe を使用しています。</target>

src/xlf/Resources.ko.xlf

@@ -387,6 +387,11 @@
         <target state="translated">'{0}'에 대한 가져오기를 구성할 수 없습니다. 문서가 너무 복잡합니다.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">'{0}'에 있는 MSBuild.exe를 사용합니다.</target>

src/xlf/Resources.pl.xlf

@@ -387,6 +387,11 @@
         <target state="translated">Nie można zorganizować importów dla elementu „{0}”. Dokument jest zbyt złożony.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">Używanie pliku MSBuild.exe znajdującego się w lokalizacji „{0}”.</target>

src/xlf/Resources.pt-BR.xlf

@@ -387,6 +387,11 @@
         <target state="translated">Não é possível organizar importações para '{0}'. O documento é muito complexo.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">Usando MSBuild.exe localizado em '{0}'.</target>

src/xlf/Resources.ru.xlf

@@ -387,6 +387,11 @@
         <target state="translated">Не удается организовать импорты для "{0}". Слишком сложный документ.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">Используется файл MSBuild.exe, расположенный в каталоге "{0}".</target>

src/xlf/Resources.tr.xlf

@@ -387,6 +387,11 @@
         <target state="translated">'{0}' için içeri aktarmalar düzenlenemiyor. Belge çok karmaşık.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">'{0}' içinde bulunan MSBuild.exe kullanılıyor.</target>

src/xlf/Resources.zh-Hans.xlf

@@ -387,6 +387,11 @@
         <target state="translated">无法整理“{0}”的导入项。文档太复杂。</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">使用“{0}”中的 MSBuild.exe。</target>

src/xlf/Resources.zh-Hant.xlf

@@ -387,6 +387,11 @@
         <target state="translated">無法組織 '{0}' 的匯入。文件太複雜。</target>
         <note />
       </trans-unit>
+      <trans-unit id="Unrecognized_command_or_argument_0">
+        <source>Unrecognized command or argument '{0}'</source>
+        <target state="new">Unrecognized command or argument '{0}'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Using_msbuildexe_located_in_0">
         <source>Using MSBuild.exe located in '{0}'.</source>
         <target state="translated">正在使用位於 '{0}' 的 MSBuild.exe。</target>

tests/ProgramTests.cs

@@ -127,26 +127,13 @@ public void CommandLine_ProjectArgument_FailsIfSpecifiedTwice()
         }
 
         [Fact]
-        public void CommandLine_FolderValidation_FailsIfFixAnalyzersSpecified()
+        public void CommandLine_ProjectOrSolutionArgumentValidation_FailsIfInvalidOptionIsSpecified()
         {
             // Arrange
             var sut = RootFormatCommand.GetCommand();
 
             // Act
-            var result = sut.Parse(new[] { "--folder", "--fix-analyzers" });
-
-            // Assert
-            Assert.Equal(1, result.Errors.Count);
-        }
-
-        [Fact]
-        public void CommandLine_FolderValidation_FailsIfFixStyleSpecified()
-        {
-            // Arrange
-            var sut = RootFormatCommand.GetCommand();
-
-            // Act
-            var result = sut.Parse(new[] { "--folder", "--fix-style" });
+            var result = sut.Parse(new[] { "--folder" });
 
             // Assert
             Assert.Equal(1, result.Errors.Count);