Various Fixes

THIRD_PARTY_NOTICES.txt

@@ -2,8 +2,8 @@ THIRD-PARTY SOFTWARE NOTICES AND INFORMATION
 
 This product incorporates components from the projects listed below. The original
 copyright notices and the licenses under which Dyalog Ltd. received such components
-are set forth below. Dyalog Ltd. licenses these components to you under the terms
-described in this file; Dyalog Ltd. reserves all other rights not expressly granted.
+are set forth below. These components are licensed to you under their respective 
+licenses as set below. Dyalog Ltd. reserves all other rights not expressly granted.
 
 =======================================================================
 

mkdocs.yml

@@ -22,6 +22,10 @@ extra_javascript:
 
 extra:
   generator: false
+  version_maj: 20
+  version_min: 0
+  version_majmin: 20.0
+  version_condensed: 200
 
 nav:
   - Home: index.md

src/OpenAPIDyalog/Constants/GeneratorConstants.cs

@@ -17,7 +17,8 @@ public static class GeneratorConstants
     public const string VersionTemplate     = "APLSource/Version.aplf.scriban";
     public const string ReadmeTemplate      = "README.md.scriban";
     public const string ModelTemplate       = "APLSource/models/model.aplc.scriban";
-    public const string HttpCommandResource = "APLSource/HttpCommand.aplc";
+    public const string HttpCommandResource        = "APLSource/HttpCommand.aplc";
+    public const string ThirdPartyNoticesResource = "OpenAPIDyalog.THIRD_PARTY_NOTICES.txt";
 
     // ── Content types ─────────────────────────────────────────────────────────
     public const string ContentTypeJson          = "application/json";

src/OpenAPIDyalog/GeneratorApplication.cs

@@ -1,3 +1,4 @@
+using System.Reflection;
 using Microsoft.Extensions.Logging;
 using OpenAPIDyalog.Constants;
 using OpenAPIDyalog.Models;
@@ -12,6 +13,18 @@ public static class GeneratorApplication
 {
     public static async Task<int> RunAsync(string[] args)
     {
+        if (args.Contains("--help") || args.Contains("-h"))
+        {
+            DisplayUsage();
+            return 0;
+        }
+
+        if (args.Contains("--third-party-notices"))
+        {
+            DisplayThirdPartyNotices();
+            return 0;
+        }
+
         if (args.Length == 0)
         {
             DisplayUsage();
@@ -147,6 +160,15 @@ public static async Task<int> RunAsync(string[] args)
         };
     }
 
+    private static void DisplayThirdPartyNotices()
+    {
+        using var stream = Assembly.GetExecutingAssembly()
+            .GetManifestResourceStream(GeneratorConstants.ThirdPartyNoticesResource)
+            ?? throw new InvalidOperationException("Third-party notices resource not found. This is a build defect.");
+        using var reader = new StreamReader(stream);
+        Console.Write(reader.ReadToEnd());
+    }
+
     // DisplayUsage is UI output, not a logging concern — Console.WriteLine is intentional.
     private static void DisplayUsage()
     {
@@ -159,7 +181,9 @@ private static void DisplayUsage()
         Console.WriteLine("  [output-directory]  Directory for generated files (default: ./generated)");
         Console.WriteLine();
         Console.WriteLine("Options:");
-        Console.WriteLine("  --no-validation, -nv  Disable OpenAPI specification validation rules");
+        Console.WriteLine("  --help, -h              Show this help message and exit");
+        Console.WriteLine("  --no-validation, -nv    Disable OpenAPI specification validation rules");
+        Console.WriteLine("  --third-party-notices   Print third-party software notices and exit");
         Console.WriteLine();
         Console.WriteLine("Examples:");
         Console.WriteLine("  OpenAPIDyalog openapispec.json");

src/OpenAPIDyalog/Models/TemplateContext.cs

@@ -1,4 +1,5 @@
 using Microsoft.OpenApi;
+using OpenAPIDyalog.Constants;
 
 namespace OpenAPIDyalog.Models;
 
@@ -117,15 +118,24 @@ public IEnumerable<string> GetAllTags()
     {
         if (Paths == null) return Enumerable.Empty<string>();
 
-        return Paths.Values
+        var operations = Paths.Values
             .Where(path => path.Operations != null)
             .SelectMany(path => path.Operations!.Values)
-            .Where(op => op.Tags != null)
+            .ToList();
+
+        var explicitTags = operations
+            .Where(op => op.Tags is { Count: > 0 })
             .SelectMany(op => op.Tags!)
             .Select(tag => tag.Name)
             .Where(name => name != null)
             .Cast<string>()
             .Distinct();
+
+        var hasTaglessOperations = operations.Any(op => op.Tags == null || op.Tags.Count == 0);
+        if (hasTaglessOperations)
+            return explicitTags.Append(GeneratorConstants.DefaultTagName).Distinct();
+
+        return explicitTags;
     }
 
     /// <summary>

src/OpenAPIDyalog/OpenAPIDyalog.csproj

@@ -23,6 +23,7 @@
   <!-- Embed all templates into the assembly for single-file distribution -->
   <ItemGroup>
     <EmbeddedResource Include="Templates\**\*" />
+    <EmbeddedResource Include="..\..\THIRD_PARTY_NOTICES.txt" LogicalName="OpenAPIDyalog.THIRD_PARTY_NOTICES.txt" />
   </ItemGroup>
 
 </Project>

src/OpenAPIDyalog/Services/ArtifactGeneratorService.cs

@@ -51,22 +51,36 @@ public async Task GenerateVersionAsync(OpenApiDocument document, string outputDi
     }
 
     /// <summary>
-    /// Copies the embedded HttpCommand.aplc binary resource to the output directory.
+    /// Copies the embedded HttpCommand.aplc binary resource to the output directory,
+    /// skipping the write if the existing file is already identical.
     /// </summary>
     public async Task CopyHttpCommandAsync(string outputDirectory)
     {
         var destPath = Path.Combine(outputDirectory, GeneratorConstants.AplSourceDir, "HttpCommand.aplc");
         Directory.CreateDirectory(Path.GetDirectoryName(destPath)!);
 
-        using var srcStream  = _templateService.GetEmbeddedResourceStream(GeneratorConstants.HttpCommandResource);
-        using var destStream = File.Create(destPath);
-        await srcStream.CopyToAsync(destStream);
+        using var srcStream = _templateService.GetEmbeddedResourceStream(GeneratorConstants.HttpCommandResource);
+        using var memStream = new MemoryStream();
+        await srcStream.CopyToAsync(memStream);
+        var srcBytes = memStream.ToArray();
 
+        if (File.Exists(destPath))
+        {
+            var destBytes = await File.ReadAllBytesAsync(destPath);
+            if (srcBytes.SequenceEqual(destBytes))
+            {
+                _logger.LogInformation("Unchanged: {AplSourceDir}/HttpCommand.aplc", GeneratorConstants.AplSourceDir);
+                return;
+            }
+        }
+
+        await File.WriteAllBytesAsync(destPath, srcBytes);
         _logger.LogInformation("Copied: {AplSourceDir}/HttpCommand.aplc", GeneratorConstants.AplSourceDir);
     }
 
     /// <summary>
-    /// Copies the OpenAPI specification file to the output directory.
+    /// Copies the OpenAPI specification file to the output directory,
+    /// skipping the write if the existing file is already identical.
     /// </summary>
     /// <exception cref="IOException">Re-thrown after logging if the copy fails.</exception>
     public async Task CopySpecificationAsync(string sourcePath, string outputDirectory)
@@ -76,9 +90,20 @@ public async Task CopySpecificationAsync(string sourcePath, string outputDirecto
 
         try
         {
-            File.Copy(sourcePath, destPath, overwrite: true);
+            var srcBytes = await File.ReadAllBytesAsync(sourcePath);
+
+            if (File.Exists(destPath))
+            {
+                var destBytes = await File.ReadAllBytesAsync(destPath);
+                if (srcBytes.SequenceEqual(destBytes))
+                {
+                    _logger.LogInformation("Unchanged: {FileName}", fileName);
+                    return;
+                }
+            }
+
+            await File.WriteAllBytesAsync(destPath, srcBytes);
             _logger.LogInformation("Copied: {FileName}", fileName);
-            await Task.CompletedTask; // async for consistent caller pattern
         }
         catch (Exception ex)
         {

src/OpenAPIDyalog/Services/TemplateService.cs

@@ -71,7 +71,7 @@ public string Render(Template template, object context)
         try
         {
             var scriptObject = BuildScriptObject(context);
-            var templateContext = new TemplateContext();
+            var templateContext = new TemplateContext { LoopLimit = int.MaxValue };
             templateContext.PushGlobal(scriptObject);
             return template.Render(templateContext);
         }
@@ -89,7 +89,7 @@ public async Task<string> RenderAsync(Template template, object context)
         try
         {
             var scriptObject = BuildScriptObject(context);
-            var templateContext = new TemplateContext();
+            var templateContext = new TemplateContext { LoopLimit = int.MaxValue };
             templateContext.PushGlobal(scriptObject);
             return await template.RenderAsync(templateContext);
         }
@@ -109,7 +109,7 @@ public async Task<string> LoadAndRenderAsync(string templateName, object context
     }
 
     /// <summary>
-    /// Saves rendered output to a file.
+    /// Saves rendered output to a file, skipping the write if the existing content is identical.
     /// </summary>
     public async Task SaveOutputAsync(string output, string outputPath)
     {
@@ -119,6 +119,9 @@ public async Task SaveOutputAsync(string output, string outputPath)
             Directory.CreateDirectory(directory);
         }
 
+        if (File.Exists(outputPath) && await File.ReadAllTextAsync(outputPath) == output)
+            return;
+
         await File.WriteAllTextAsync(outputPath, output);
     }
 

src/OpenAPIDyalog/Templates/APLSource/Client.aplc.scriban

@@ -1,5 +1,4 @@
 :Class {{ class_name ?? "Client" }}
-    ⍝ Generated on {{ generated_at | date.to_string "%Y-%m-%d %H:%M:%S" }} UTC
     ⍝ {{ title }} - Version {{ version }}
     {{~ if description ~}}
     {{ comment_lines description }}

src/OpenAPIDyalog/Templates/APLSource/utils.apln.scriban

@@ -1,5 +1,4 @@
 :Namespace utils
-    ⍝ Generated on {{ generated_at | date.to_string "%Y-%m-%d %H:%M:%S" }} UTC
     ⍝ {{ title }} - Version {{ version }}
     ⍝ Utility functions for HTTP requests and parameter validation
 
@@ -98,12 +97,12 @@
 
     ∇
 
-    isValidPathParam←{
+      isValidPathParam←{
         ⍝ True if argument is a character vector or a scalar number
-        isChar←(0=10|⎕DR)⍵
+        isChar←(1=≢⍴1∘/⍵)∧(0=10|⎕DR)⍵
         isScalarNum←(0=≢⍴⍵)∧2|⎕DR ⍵
-        isChar ∨ isScalarNum
-    }
+        isChar∨isScalarNum
+      }
 
     base64←{⎕IO ⎕ML←0 1             ⍝ Base64 encoding and decoding as used in MIME.