feat: windows-devshell

package/windows-devshell/default.nix

@@ -0,0 +1,26 @@
+{ pkgs, writeTextFile, lib, linux-devshell-standalone }:
+let
+  psScriptTemplate = builtins.readFile ./windows-devshell.ps1;
+
+  # Get the linux-devshell standalone script content and base64 encode it
+  linuxDevShellBase64 = lib.removeSuffix "\n"
+    (builtins.readFile
+      (pkgs.runCommand "base64-linux-devshell" {}
+        ''
+          ${pkgs.coreutils}/bin/base64 -w 0 ${linux-devshell-standalone} > $out
+        ''));
+
+  # Standalone PowerShell script (single file for Windows)
+  windowsDevShellStandalone = writeTextFile {
+    name = "windows-devshell.ps1";
+    executable = false;
+    text = lib.replaceStrings ["@LINUX_DEVSHELL_BASE64@"] [linuxDevShellBase64] psScriptTemplate;
+    meta = {
+      description = "Standalone windows-devshell PowerShell script (single file)";
+    };
+  };
+
+in
+{
+  windows-devshell-standalone = windowsDevShellStandalone;
+}