add bare metal runtime

.devcontainer/devcontainer.json

@@ -1,7 +1,12 @@
 {
 	"name": "Alpine",
 	"image": "mcr.microsoft.com/devcontainers/base:alpine",
-	"postCreateCommand": "sudo apk add nix nix-dev nix-doc nix-manual nix-bash-completion && sudo chown -R vscode:vscode /nix && echo 'experimental-features = nix-command flakes' | sudo tee -a /etc/nix/nix.conf",
+	"features": {
+		"ghcr.io/devcontainers/features/nix:1": {
+			"extraNixConfig": "experimental-features = nix-command flakes",
+			"packages": "nixpkgs-fmt"
+		}
+	},
 	"runArgs": [
 		"--userns=keep-id"
 	],

.gitignore

@@ -1 +1,2 @@
-result
+result
+nohup.out

flake.nix

@@ -19,15 +19,15 @@
     {
       packages = rec {
         playground = space.playground.package;
-        default = playground;
+        default = pkgs.callPackage ./playground/runtime/engines/baremetal { services = [ space.playground.package ]; };
       };
       apps = rec {
         playground = flake-utils.lib.mkApp { drv = space.playground.package; exePath = ""; };
-        default = playground;
+        default = flake-utils.lib.mkApp { drv = self.packages.${system}.default; };
       };
 
       devShells.default = pkgs.mkShell {
-        packages = [ pkgs.nixpkgs-fmt pkgs.nixpkgs-lint ];
+        packages = [ pkgs.nixpkgs-fmt ];
       };
     });
 }

playground/example/services/python/default.nix

@@ -1,5 +1,7 @@
 { config ? import ../../config { } }:
 
 config.nixpkgs.writeScript "python-example-web-server" ''
+  #! /usr/bin/env sh
+  
   ${config.nixpkgs.python3}/bin/python -m http.server ${config.playground.port}        
 ''

playground/example/services/rust/default.nix

@@ -1,6 +1,8 @@
 { config ? import ../../config { } }:
 
 config.nixpkgs.writeScript "rust-example-web-server" ''
+  #! /usr/bin/env sh
+  
   ${config.nixpkgs.simple-http-server}/bin/simple-http-server --port ${config.playground.port}        
 ''
 

playground/runtime/engines/baremetal/default.nix

@@ -0,0 +1,28 @@
+{ pkgs, lib, services ? [ ] }:
+
+let
+
+  backgroundServices = lib.forEach services (s: " exec nohup 2>&1 ${s} &");
+  launchBackgroundServices = lib.strings.concatLines backgroundServices;
+
+in
+
+pkgs.writeScriptBin "run" ''
+  #! /usr/bin/env sh
+
+  echo start services
+
+  ${launchBackgroundServices}
+
+  sleep 3
+
+  read -r -p "to stop press any key:"
+ 
+  echo stop services
+
+  for job in `jobs -p`
+  do
+    pkill -P $job
+    kill $job
+  done
+''