Add TShock.Installer to download dotnet runtime

This will include a new ./TShock.Installer executable that will be for users without the dotnet runtime. This program will download the dotnet runtime, extract it, and then run ./TShock.Server for them using the downloaded runtime.

Note: only tested on osx, likely a no-go for linux/windows until more testing occurs.

.github/workflows/ci-otapi3.yml

@@ -36,6 +36,11 @@ jobs:
       - name: Install msgfmt
         run: sudo apt-get install -y gettext
 
+      - name: Produce installer
+        run: |
+            cd TShockInstaller
+            dotnet publish -r ${{ matrix.arch }} -f net6.0 -c Release -p:PublishSingleFile=true --self-contained true
+
       - name: Produce build
         run: |
             cd TShockLauncher
@@ -46,6 +51,10 @@ jobs:
         run: |
             chmod +x TShockLauncher/bin/Release/net6.0/${{ matrix.arch }}/publish/TShock.Server
 
+      - name: Copy installer
+        run: |
+            cp TShockInstaller/bin/Release/net6.0/${{ matrix.arch }}/publish/* TShockLauncher/bin/Release/net6.0/${{ matrix.arch }}/publish/
+
       # preserve file perms: https://github.com/actions/upload-artifact#maintaining-file-permissions-and-case-sensitive-files
       - name: Tarball artifact (non-Windows)
         if: ${{ matrix.arch != 'win-x64' }}

TShock.sln

@@ -26,6 +26,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TShockLauncher", "TShockLau
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TShockLauncher.Tests", "TShockLauncher.Tests\TShockLauncher.Tests.csproj", "{90AB47F3-8220-48FC-BDAB-D6E97BFDA51B}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TShockInstaller", "TShockInstaller\TShockInstaller.csproj", "{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -102,6 +104,22 @@ Global
 		{90AB47F3-8220-48FC-BDAB-D6E97BFDA51B}.Release|x64.Build.0 = Release|Any CPU
 		{90AB47F3-8220-48FC-BDAB-D6E97BFDA51B}.Release|x86.ActiveCfg = Release|Any CPU
 		{90AB47F3-8220-48FC-BDAB-D6E97BFDA51B}.Release|x86.Build.0 = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|x64.Build.0 = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Debug|x86.Build.0 = Debug|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|x64.ActiveCfg = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|x64.Build.0 = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|x86.ActiveCfg = Release|Any CPU
+		{17AC4DD0-8334-4B5C-ABED-77EAF52D75FA}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

TShockInstaller/Program.cs

@@ -0,0 +1,93 @@
+using System.Diagnostics;
+using System.IO.Compression;
+using System.Runtime.InteropServices;
+using ICSharpCode.SharpZipLib.GZip;
+using ICSharpCode.SharpZipLib.Tar;
+
+Console.WriteLine($"TShock Installer {typeof(Program).GetType().Assembly.GetName().Version}.");
+
+// reference: https://github.com/dotnet/install-scripts/blob/main/src/dotnet-install.sh
+// ./dotnet-install.sh -verbose -version 6.0.11 --runtime dotnet
+
+Console.WriteLine("Determining dotnet runtime url...");
+
+string? url = null;
+if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+	url = "https://dotnetcli.azureedge.net/dotnet/Runtime/6.0.11/dotnet-runtime-6.0.11-osx-x64.tar.gz";
+else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+	url = "https://dotnetcli.azureedge.net/dotnet/Runtime/6.0.11/dotnet-runtime-6.0.11-win-x64.zip";
+else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+	url = "https://dotnetcli.azureedge.net/dotnet/Runtime/6.0.11/dotnet-runtime-6.0.11-linux-x64.tar.gz";
+
+if(url is null)
+{
+	Console.WriteLine("Unable to determine .net runtime to install. " +
+		"Refer to https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-install-script " +
+		"and install using --install-dir dotnet, so that the dotnet folder is beside TShock.Server.dll");
+	return;
+}
+
+Console.WriteLine("Using url: " + url);
+
+var filename = url.Split('/').Last();
+var is_targz = filename.EndsWith(".tar.gz");
+
+var download_info = new FileInfo(filename);
+if (!download_info.Exists) // todo hash check
+{
+	Console.WriteLine($"Downloading: {filename}...");
+
+	using var client = new HttpClient();
+	using var resp = await client.GetStreamAsync(url);
+	using var fs = new FileStream(filename, FileMode.Create);
+	await resp.CopyToAsync(fs);
+}
+else
+{
+	Console.WriteLine("Using existing download on disk: " + filename);
+}
+
+var dotnet_path = Path.Combine("dotnet", "dotnet" + (is_targz ? "" : ".exe"));
+var tshock_path = "TShock.Server" + (is_targz ? "" : ".exe");
+
+if (!File.Exists(dotnet_path))
+{
+	Console.WriteLine("Extracting to ./dotnet/");
+	if (is_targz)
+	{
+		using var srm_dotnet_file = File.OpenRead(filename);
+		using var srm_gzip = new GZipInputStream(srm_dotnet_file);
+
+		using var tar_archive = TarArchive.CreateInputTarArchive(srm_gzip, System.Text.Encoding.UTF8);
+		tar_archive.ExtractContents("dotnet");
+
+		[DllImport("libc", SetLastError = true)]
+		static extern int chmod(string pathname, int mode);
+
+		chmod(dotnet_path, 755);
+	}
+	else
+	{
+		ZipFile.ExtractToDirectory(filename, "dotnet");
+	}
+}
+else
+{
+	Console.WriteLine($"Extract skipped, existing found at: {dotnet_path}");
+}
+
+var dotnet_root = System.IO.Path.GetFullPath("dotnet");
+Console.WriteLine($"To be able to run {tshock_path} yourself set the environment variable DOTNET_ROOT={dotnet_root}");
+
+Environment.SetEnvironmentVariable("DOTNET_ROOT", dotnet_root);
+
+Console.WriteLine($"Extracted, launching: {tshock_path}");
+var proc = new Process();
+proc.StartInfo = new()
+{
+	 FileName = tshock_path,
+};
+foreach (var arg in args)
+	proc.StartInfo.ArgumentList.Add(arg);
+proc.Start();
+await proc.WaitForExitAsync();

TShockInstaller/TShockInstaller.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <Version>5.0.0</Version>
+    <PublishTrimmed>true</PublishTrimmed>
+    <AssemblyName>TShock.Installer</AssemblyName>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SharpZipLib" Version="1.4.1" />
+  </ItemGroup>
+</Project>