fix(commandlinehelp): Ignore hidden commands

Do not generate documentation for commands when the option class is marked as hidden

Closes #20

Author: ap0llo

src/MdDocs.CommandLineHelp.Test/Model/_Application/MultiCommandApplicationDocumentationTest.cs

@@ -167,5 +167,31 @@ public class Command1Options
             Assert.NotNull(sut.Usage);
             Assert.Empty(sut.Usage);
         }
+
+        [Fact]
+        public void Hidden_option_classes_are_ignored()
+        {
+            // ARRANGE
+            var cs = @"
+                using CommandLine;
+
+                [Verb(""command1"")]
+                public class Command1Options
+                { }
+
+                [Verb(""command2"", Hidden = true)]
+                public class Command2Options
+                { }
+            ";
+
+            using var assembly = Compile(cs);
+
+            // ACT
+            var sut = MultiCommandApplicationDocumentation.FromAssemblyDefinition(assembly, NullLogger.Instance);
+
+            // ASSERT
+            var command = Assert.Single(sut.Commands);
+            Assert.Equal("command1", command.Name);
+        }
     }
 }

src/MdDocs.CommandLineHelp/Model/_Application/MultiCommandApplicationDocumentation.cs

@@ -43,6 +43,7 @@ private IReadOnlyList<CommandDocumentation> LoadCommands(AssemblyDefinition defi
             return definition.MainModule.Types
                 .Where(x => !x.IsAbstract)
                 .WithAttribute(Constants.VerbAttributeFullName)
+                .Where(x => !x.GetAttribute(Constants.VerbAttributeFullName).GetPropertyValueOrDefault<bool>("Hidden"))
                 .Select(type => CommandDocumentation.FromTypeDefinition(this, type, logger))
                 .ToArray();
         }