Convert project to use Cocona

Closes #12

src/Converter/ConverterService.cs → src/Converter/Commands/ConvertDbfToCsv/ConvertDbfToCsvCommand.cs

@@ -1,23 +1,36 @@
-using Microsoft.Extensions.Logging;
-using System.Data;
+using System.Data;
 using System.Data.OleDb;
 using System.Text;
+using Cocona;
+using Microsoft.Extensions.Logging;
 
-namespace Converter;
+namespace Converter.Commands.ConvertDbfToCsv;
 
-public class ConverterService(Options options, ILogger<ConverterService> logger)
+internal class ConvertDbfToCsvCommand(ILogger<ConvertDbfToCsvCommand> logger)
 {
-    public void Convert()
+    public int Convert([Argument] string inputFile)
     {
-        var inputFile = options.InputFile;
         logger.LogInformation("Input file: {InputFile}", inputFile);
+
+        if (InvalidInputFile(inputFile))
+        {
+            logger.LogError("Input file {InputFile} does not exist", inputFile);
+            return -1;
+        }
 
         var connectionString = $"Provider=VFPOLEDB.1;Data Source={inputFile};Collating Sequence=general;";
         var fileName = Path.GetFileNameWithoutExtension(inputFile);
         var outputFile = $"{fileName}.csv";
         logger.LogInformation("Output file: {OutputFile}", outputFile);
 
         ConvertToCsv(connectionString, inputFile, outputFile);
+
+        return 0;
+    }
+
+    private bool InvalidInputFile(string inputFile)
+    {
+        return !File.Exists(inputFile);
     }
 
     private void ConvertToCsv(string connectionString, string inputFile, string outputFile)

src/Converter/Converter.csproj

@@ -10,7 +10,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="CommandLineParser" Version="2.9.1" />
+      <PackageReference Include="Cocona" Version="2.2.0" />
       <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />
       <PackageReference Include="System.Data.OleDb" Version="8.0.0" />
     </ItemGroup>

src/Converter/Program.cs

@@ -1,28 +1,16 @@
-// See https://aka.ms/new-console-template for more information
-
-using CommandLine;
-using Converter;
+using Cocona;
+using Converter.Commands.ConvertDbfToCsv;
 using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
 
-Parser.Default.ParseArguments<Options>(args)
-    .WithParsed(options =>
-    {
-        Console.WriteLine("Visual FoxPro 2 CSV Converter v1.0.0");
-        Console.WriteLine("=====================================");
-        Console.WriteLine();
-
-        var builder = Host.CreateDefaultBuilder(args);
-        builder.ConfigureServices(services =>
-        {
-            services.AddSingleton(options);
-            services.AddSingleton<ConverterService>();
-        });
-
-        var app = builder.Build();
-
-        var converter = app.Services.GetRequiredService<ConverterService>();
-        converter.Convert();
-    });
+var builder = CoconaApp.CreateBuilder();
+builder.Services.AddSingleton<ConvertDbfToCsvCommand>();
+
+var app = builder.Build();
+
+Console.WriteLine("Visual FoxPro 2 CSV Converter v1.0.0");
+Console.WriteLine("=====================================");
+Console.WriteLine();
 
+app.AddCommands<ConvertDbfToCsvCommand>();
 
+app.Run();