Update help output for required options

src/Spectre.Console.Cli/Help/HelpProvider.cs

@@ -53,8 +53,8 @@ public class HelpProvider : IHelpProvider
         {
             var arguments = new List<HelpArgument>();
             arguments.AddRange(command?.Parameters?.OfType<ICommandArgument>()?.Select(
-                x => new HelpArgument(x.Value, x.Position, x.Required, x.Description))
+                                   x => new HelpArgument(x.Value, x.Position, x.IsRequired, x.Description))
-                ?? Array.Empty<HelpArgument>());
+                               ?? Array.Empty<HelpArgument>());
             return arguments;
         }
     }
@@ -65,15 +65,20 @@ public class HelpProvider : IHelpProvider
         public string? Long { get; }
         public string? Value { get; }
         public bool? ValueIsOptional { get; }
+        public bool IsRequired { get; }
         public string? Description { get; }
         public object? DefaultValue { get; }
 
-        private HelpOption(string? @short, string? @long, string? @value, bool? valueIsOptional, string? description, object? defaultValue)
+        private HelpOption(
+            string? @short, string? @long, string? @value,
+            bool? valueIsOptional, bool isRequired,
+            string? description, object? defaultValue)
         {
             Short = @short;
             Long = @long;
             Value = value;
             ValueIsOptional = valueIsOptional;
+            IsRequired = isRequired;
             Description = description;
             DefaultValue = defaultValue;
         }
@@ -85,7 +90,8 @@ public class HelpProvider : IHelpProvider
         {
             var parameters = new List<HelpOption>
             {
-                new HelpOption("h", "help", null, null, resources.PrintHelpDescription, null),
+                new HelpOption("h", "help", null, null, false,
+                    resources.PrintHelpDescription, null),
             };
 
             // Version information applies to the entire CLI application.
@@ -107,17 +113,18 @@ public class HelpProvider : IHelpProvider
                     // Only show the version option if there is an application version set.
                     if (model.ApplicationVersion != null)
                     {
-                        parameters.Add(new HelpOption("v", "version", null, null, resources.PrintVersionDescription, null));
+                        parameters.Add(new HelpOption("v", "version", null, null, false,
+                            resources.PrintVersionDescription, null));
                     }
                 }
             }
 
             parameters.AddRange(command?.Parameters.OfType<ICommandOption>().Where(o => !o.IsHidden).Select(o =>
-                new HelpOption(
+                                    new HelpOption(
-                    o.ShortNames.FirstOrDefault(), o.LongNames.FirstOrDefault(),
+                                        o.ShortNames.FirstOrDefault(), o.LongNames.FirstOrDefault(),
-                    o.ValueName, o.ValueIsOptional, o.Description,
+                                        o.ValueName, o.ValueIsOptional, o.IsRequired, o.Description,
-                    o.IsFlag && o.DefaultValue?.Value is false ? null : o.DefaultValue?.Value))
+                                        o.IsFlag && o.DefaultValue?.Value is false ? null : o.DefaultValue?.Value))
-                ?? Array.Empty<HelpOption>());
+                                ?? Array.Empty<HelpOption>());
             return parameters;
         }
     }
@@ -215,7 +222,8 @@ public class HelpProvider : IHelpProvider
                 {
                     if (isCurrent)
                     {
-                        parameters.Add(NewComposer().Style(helpStyles?.Usage?.CurrentCommand ?? Style.Plain, $"{current.Name}"));
+                        parameters.Add(NewComposer().Style(helpStyles?.Usage?.CurrentCommand ?? Style.Plain,
+                            $"{current.Name}"));
                     }
                     else
                     {
@@ -228,38 +236,44 @@ public class HelpProvider : IHelpProvider
                     if (isCurrent)
                     {
                         foreach (var argument in current.Parameters.OfType<ICommandArgument>()
-                            .Where(a => a.Required).OrderBy(a => a.Position).ToArray())
+                                     .Where(a => a.IsRequired).OrderBy(a => a.Position).ToArray())
                         {
-                            parameters.Add(NewComposer().Style(helpStyles?.Usage?.RequiredArgument ?? Style.Plain, $"<{argument.Value}>"));
+                            parameters.Add(NewComposer().Style(helpStyles?.Usage?.RequiredArgument ?? Style.Plain,
+                                $"<{argument.Value}>"));
                         }
                     }
 
-                    var optionalArguments = current.Parameters.OfType<ICommandArgument>().Where(x => !x.Required).ToArray();
+                    var optionalArguments = current.Parameters.OfType<ICommandArgument>().Where(x => !x.IsRequired)
+                        .ToArray();
                     if (optionalArguments.Length > 0 || !isCurrent)
                     {
                         foreach (var optionalArgument in optionalArguments)
                         {
-                            parameters.Add(NewComposer().Style(helpStyles?.Usage?.OptionalArgument ?? Style.Plain, $"[{optionalArgument.Value}]"));
+                            parameters.Add(NewComposer().Style(helpStyles?.Usage?.OptionalArgument ?? Style.Plain,
+                                $"[{optionalArgument.Value}]"));
                         }
                     }
                 }
 
                 if (isCurrent)
                 {
-                    parameters.Add(NewComposer().Style(helpStyles?.Usage?.Options ?? Style.Plain, $"[{resources.Options}]"));
+                    parameters.Add(NewComposer()
+                        .Style(helpStyles?.Usage?.Options ?? Style.Plain, $"[{resources.Options}]"));
                 }
             }
 
             if (command.IsBranch && command.DefaultCommand == null)
             {
                 // The user must specify the command
-                parameters.Add(NewComposer().Style(helpStyles?.Usage?.Command ?? Style.Plain, $"<{resources.Command}>"));
+                parameters.Add(NewComposer()
+                    .Style(helpStyles?.Usage?.Command ?? Style.Plain, $"<{resources.Command}>"));
             }
             else if (command.IsBranch && command.DefaultCommand != null && command.Commands.Count > 0)
             {
                 // We are on a branch with a default command
                 // The user can optionally specify the command
-                parameters.Add(NewComposer().Style(helpStyles?.Usage?.Command ?? Style.Plain, $"[{resources.Command}]"));
+                parameters.Add(NewComposer()
+                    .Style(helpStyles?.Usage?.Command ?? Style.Plain, $"[{resources.Command}]"));
             }
             else if (command.IsDefaultCommand)
             {
@@ -269,7 +283,8 @@ public class HelpProvider : IHelpProvider
                 {
                     // Commands other than the default are present
                     // So make these optional in the usage statement
-                    parameters.Add(NewComposer().Style(helpStyles?.Usage?.Command ?? Style.Plain, $"[{resources.Command}]"));
+                    parameters.Add(NewComposer()
+                        .Style(helpStyles?.Usage?.Command ?? Style.Plain, $"[{resources.Command}]"));
                 }
             }
         }
@@ -338,7 +353,8 @@ public class HelpProvider : IHelpProvider
             for (var index = 0; index < Math.Min(maxExamples, examples.Count); index++)
             {
                 var args = string.Join(" ", examples[index]);
-                composer.Tab().Text(model.ApplicationName).Space().Style(helpStyles?.Examples?.Arguments ?? Style.Plain, args);
+                composer.Tab().Text(model.ApplicationName).Space()
+                    .Style(helpStyles?.Examples?.Arguments ?? Style.Plain, args);
                 composer.LineBreak();
             }
 
@@ -364,7 +380,8 @@ public class HelpProvider : IHelpProvider
 
         var result = new List<IRenderable>
         {
-            NewComposer().LineBreak().Style(helpStyles?.Arguments?.Header ?? Style.Plain, $"{resources.Arguments}:").LineBreak(),
+            NewComposer().LineBreak().Style(helpStyles?.Arguments?.Header ?? Style.Plain, $"{resources.Arguments}:")
+                .LineBreak(),
         };
 
         var grid = new Grid();
@@ -407,7 +424,8 @@ public class HelpProvider : IHelpProvider
 
         var result = new List<IRenderable>
         {
-            NewComposer().LineBreak().Style(helpStyles?.Options?.Header ?? Style.Plain, $"{resources.Options}:").LineBreak(),
+            NewComposer().LineBreak().Style(helpStyles?.Options?.Header ?? Style.Plain, $"{resources.Options}:")
+                .LineBreak(),
         };
 
         var helpOptions = parameters.ToArray();
@@ -439,7 +457,15 @@ public class HelpProvider : IHelpProvider
                 columns.Add(GetDefaultValueForOption(option.DefaultValue));
             }
 
-            columns.Add(NewComposer().Text(NormalizeDescription(option.Description)));
+            var description = option.Description;
+            if (option.IsRequired)
+            {
+                description = string.IsNullOrWhiteSpace(description)
+                    ? "[i]Required[/]"
+                    : description.TrimEnd('.') + ". [i]Required[/]";
+            }
+
+            columns.Add(NewComposer().Text(NormalizeDescription(description)));
 
             grid.AddRow(columns.ToArray());
         }
@@ -470,7 +496,8 @@ public class HelpProvider : IHelpProvider
 
         var result = new List<IRenderable>
         {
-            NewComposer().LineBreak().Style(helpStyles?.Commands?.Header ?? Style.Plain, $"{resources.Commands}:").LineBreak(),
+            NewComposer().LineBreak().Style(helpStyles?.Commands?.Header ?? Style.Plain, $"{resources.Commands}:")
+                .LineBreak(),
         };
 
         var grid = new Grid();
@@ -546,11 +573,11 @@ public class HelpProvider : IHelpProvider
             composer.Text(" ");
             if (option.ValueIsOptional ?? false)
             {
-                composer.Style(helpStyles?.Options?.OptionalOption ?? Style.Plain, $"[{option.Value}]");
+                composer.Style(helpStyles?.Options?.OptionalOptionValue ?? Style.Plain, $"[{option.Value}]");
             }
             else
             {
-                composer.Style(helpStyles?.Options?.RequiredOption ?? Style.Plain, $"<{option.Value}>");
+                composer.Style(helpStyles?.Options?.RequiredOptionValue ?? Style.Plain, $"<{option.Value}>");
             }
         }
 
@@ -564,8 +591,12 @@ public class HelpProvider : IHelpProvider
             null => NewComposer().Text(" "),
             "" => NewComposer().Text(" "),
             Array { Length: 0 } => NewComposer().Text(" "),
-            Array array => NewComposer().Join(", ", array.Cast<object>().Select(o => NewComposer().Style(helpStyles?.Options?.DefaultValue ?? Style.Plain, o.ToString() ?? string.Empty))),
+            Array array => NewComposer().Join(", ",
-            _ => NewComposer().Style(helpStyles?.Options?.DefaultValue ?? Style.Plain, defaultValue?.ToString() ?? string.Empty),
+                array.Cast<object>().Select(o =>
+                    NewComposer().Style(helpStyles?.Options?.DefaultValue ?? Style.Plain,
+                        o.ToString() ?? string.Empty))),
+            _ => NewComposer().Style(helpStyles?.Options?.DefaultValue ?? Style.Plain,
+                defaultValue?.ToString() ?? string.Empty),
         };
     }
 

src/Spectre.Console.Cli/Help/HelpProviderStyles.cs

@@ -76,8 +76,8 @@ public sealed class HelpProviderStyle
                 Header = "yellow",
                 DefaultValueHeader = "lime",
                 DefaultValue = "bold",
-                RequiredOption = "silver",
+                RequiredOptionValue = "silver",
-                OptionalOption = "grey",
+                OptionalOptionValue = "grey",
             },
         };
 }
@@ -212,8 +212,13 @@ public sealed class OptionStyle
     /// </summary>
     public Style? RequiredOption { get; set; }
 
+    /// <summary>
+    /// Gets or sets the style for required option values.
+    /// </summary>
+    public Style? RequiredOptionValue { get; set; }
+
     /// <summary>
     /// Gets or sets the style for optional options.
     /// </summary>
-    public Style? OptionalOption { get; set; }
+    public Style? OptionalOptionValue { get; set; }
 }

src/Spectre.Console.Cli/Help/ICommandParameter.cs

@@ -13,7 +13,7 @@ public interface ICommandParameter
     /// <summary>
     /// Gets a value indicating whether the parameter is required.
     /// </summary>
-    bool Required { get; }
+    bool IsRequired { get; }
 
     /// <summary>
     /// Gets the description of the parameter.

src/Tests/Spectre.Console.Cli.Tests/Data/Settings/RequiredOptionsSettings.cs

@@ -1,6 +1,13 @@
 namespace Spectre.Console.Tests.Data;
 
 public class RequiredOptionsSettings : CommandSettings
+{
+    [CommandOption("--foo <VALUE>", true)]
+    [Description("Foos the bars")]
+    public string Foo { get; set; }
+}
+
+public class RequiredOptionsWithoutDescriptionSettings : CommandSettings
 {
     [CommandOption("--foo <VALUE>", true)]
     public string Foo { get; set; }

src/Tests/Spectre.Console.Cli.Tests/Expectations/Help/Required_Options.Output.DotNet8_0.verified.txt

@@ -0,0 +1,6 @@
+USAGE:
+    myapp [OPTIONS]
+
+OPTIONS:
+    -h, --help           Prints help information
+        --foo <VALUE>    Foos the bars. Required

src/Tests/Spectre.Console.Cli.Tests/Expectations/Help/Required_Options.Output.DotNet9_0.verified.txt

@@ -0,0 +1,6 @@
+USAGE:
+    myapp [OPTIONS]
+
+OPTIONS:
+    -h, --help           Prints help information
+        --foo <VALUE>    Foos the bars. Required

src/Tests/Spectre.Console.Cli.Tests/Expectations/Help/Required_Options_No_Description.Output.DotNet8_0.verified.txt

@@ -0,0 +1,6 @@
+USAGE:
+    myapp [OPTIONS]
+
+OPTIONS:
+    -h, --help           Prints help information
+        --foo <VALUE>    Required

src/Tests/Spectre.Console.Cli.Tests/Expectations/Help/Required_Options_No_Description.Output.DotNet9_0.verified.txt

@@ -0,0 +1,6 @@
+USAGE:
+    myapp [OPTIONS]
+
+OPTIONS:
+    -h, --help           Prints help information
+        --foo <VALUE>    Required

src/Tests/Spectre.Console.Cli.Tests/Unit/CommandAppTests.Help.cs

@@ -1061,5 +1061,43 @@ public sealed partial class CommandAppTests
             // Then
             return Verifier.Verify(result.Output);
         }
+
+        [Fact]
+        [Expectation("Required_Options")]
+        public Task Should_Show_Required_Options()
+        {
+            // Given
+            var fixture = new CommandAppTester();
+            fixture.SetDefaultCommand<GenericCommand<RequiredOptionsSettings>>();
+            fixture.Configure(configurator =>
+            {
+                configurator.SetApplicationName("myapp");
+            });
+
+            // When
+            var result = fixture.Run("--help");
+
+            // Then
+            return Verifier.Verify(result.Output);
+        }
+
+        [Fact]
+        [Expectation("Required_Options_No_Description")]
+        public Task Should_Show_Required_Options_Without_Description()
+        {
+            // Given
+            var fixture = new CommandAppTester();
+            fixture.SetDefaultCommand<GenericCommand<RequiredOptionsWithoutDescriptionSettings>>();
+            fixture.Configure(configurator =>
+            {
+                configurator.SetApplicationName("myapp");
+            });
+
+            // When
+            var result = fixture.Run("--help");
+
+            // Then
+            return Verifier.Verify(result.Output);
+        }
     }
 }

src/Tests/Spectre.Console.Cli.Tests/Unit/Testing/InteractiveCommandTests.cs

@@ -1,4 +1,4 @@
-namespace Spectre.Console.Cli.Tests.Unit.Testing;
+namespace Spectre.Console.Tests.Unit.Cli;
 
 public sealed class InteractiveCommandTests
 {