Added an untested generation command.

DotNetResxUtils/.vscode/launch.json

@@ -0,0 +1,26 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            // Use IntelliSense to find out which attributes exist for C# debugging
+            // Use hover for the description of the existing attributes
+            // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/bin/Debug/net6.0/DotNetResxUtils.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+            "console": "internalConsole",
+            "stopAtEntry": false
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach"
+        }
+    ]
+}

DotNetResxUtils/.vscode/tasks.json

@@ -0,0 +1,41 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/DotNetResxUtils.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/DotNetResxUtils.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/DotNetResxUtils.csproj"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

DotNetResxUtils/Commands/GenerationCommand.cs

@@ -0,0 +1,86 @@
+using System.Collections.Generic;
+using System.IO;
+using System.CommandLine;
+using System.Text.Json;
+using System.Threading.Tasks;
+using System.Resources.NetStandard;
+
+namespace DotNetResxUtils.Commands
+{
+    internal class GenerationCommand
+    {
+        const string NAME = "generate";
+        const string DESC = "Generate a .resx file.";
+
+        public GenerationCommand(RootCommand rootCmd)
+        {
+            Command cmd = new Command(NAME, DESC);
+            rootCmd.AddCommand(cmd);
+
+            Option<FileInfo?> fromOpt = new Option<FileInfo?>("--from", "Generates a .resx file from the given file.");
+
+            Argument<FileInfo> destArg = new Argument<FileInfo>("destination", "The destination path to store this file. If no extension is given, .resx will automatically be concatenated.");
+
+            cmd.AddOption(fromOpt);
+            cmd.AddArgument(destArg);
+
+            cmd.SetHandler<FileInfo, FileInfo?>(CommandHandler, destArg, fromOpt);
+        }
+        private async void CommandHandler(FileInfo to, FileInfo? from)
+        {
+            IDictionary<string, string> flattened = new Dictionary<string, string>();
+            if (from != null)
+            {
+                flattened = await FlattenJson(from);
+            }
+            using (ResXResourceWriter resxWriter = new ResXResourceWriter(to.FullName))
+            {
+                foreach (KeyValuePair<string, string> keyVal in flattened)
+                {
+                    resxWriter.AddResource(keyVal.Key, keyVal.Value);
+                }
+            }
+        }
+
+        private async Task<IDictionary<string, string>> FlattenJson(FileInfo jsonFile)
+        {
+            JsonElement jsonObj;
+            using (FileStream readStream = jsonFile.OpenRead())
+            {
+                jsonObj = await JsonSerializer.DeserializeAsync<JsonElement>(readStream);
+            }
+            Dictionary<string, string> result = new Dictionary<string, string>();
+            FlattenJsonElement(result, jsonObj, "");
+            return result;
+        }
+
+        private void FlattenJsonElement(IDictionary<string, string> flattened, JsonElement jsonElement, string namepath)
+        {
+            if (jsonElement.ValueKind == JsonValueKind.Array)
+            {
+                int itemIndex = 0;
+                foreach (JsonElement item in jsonElement.EnumerateArray())
+                {
+                    FlattenJsonElement(flattened, item, namepath + $"[{itemIndex}]");
+                }
+            }
+            else if (jsonElement.ValueKind == JsonValueKind.Object)
+            {
+                foreach (JsonProperty item in jsonElement.EnumerateObject())
+                {
+                    FlattenJsonElement(flattened, item.Value, namepath + $".{item.Name}");
+                }
+            }
+            else
+            {
+                string? stored = jsonElement.GetString();
+                if (stored != null)
+                {
+                    flattened[namepath] = stored;
+                }
+            }
+        }
+    }
+
+
+}

DotNetResxUtils/DotNetResxUtils.csproj

@@ -1,14 +1,21 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <!-- not for choosing a file extension, just designating as executable item -->
     <OutputType>exe</OutputType>
     <PublishSingleFile>true</PublishSingleFile>
     <SelfContained>true</SelfContained>
     <PublishReadyToRun>true</PublishReadyToRun>
     <IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract>
+    <PublishTrimmed>true</PublishTrimmed>
     <TargetFramework>net6.0</TargetFramework>
     <ImplicitUsings>disable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="ResXResourceReader.NetStandard" Version="1.1.0" />
+    <PackageReference Include="System.CommandLine" Version="2.0.0-beta3.22114.1" />
+  </ItemGroup>
+
 </Project>

DotNetResxUtils/Program.cs

@@ -1,4 +1,6 @@
-using System;
+using System.IO;
+using System;
+using System.CommandLine;
 
 namespace DotNetResxUtils
 {
@@ -6,8 +8,20 @@ namespace DotNetResxUtils
     {
         static void Main(string[] args)
         {
-            Console.WriteLine("Hello, World!");
+            RootCommand rootCmd = new RootCommand(".Net Resx Utils provides tools for generating, and editing .resx files.");
+            Command genCmd = new Command("gen", "Generate a .resx file.");
+            rootCmd.AddCommand(genCmd);
 
+            // See: Collection organizers - https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/object-and-collection-initializers
+
+            Option<FileInfo?> convertOpt = new Option<FileInfo?>("--convert", "Generates a .resx file from the given file. Currently only supports .json files.");
+            genCmd.AddOption(convertOpt);
+
+            Argument<string> destArg = new Argument<string>("destination", "The destination path to store this file. If no extension is given, .resx will automatically be concatenated.");
+            genCmd.AddArgument(destArg);
+
+
+            genCmd.SetHandler(async (string dst, FileInfo? from))
         }
     }
 }