Added ADA via GNAT 11.2.0

runtimes/default.nix

@@ -51,4 +51,5 @@ args: {
     "gcc-fortran" = import ./gcc-fortran.nix args;
     "yabasic" = import ./yabasic.nix args;
     "emacs" = import ./emacs.nix args;
+    "gnat-ada" = import ./gnat-ada.nix args;
 }

runtimes/gnat-ada.nix

@@ -0,0 +1,41 @@
+{pkgs, piston, ...}:
+let
+    pkg = pkgs.gnat;
+in piston.mkRuntime {
+    language = "ada";
+    version = pkg.version;
+    runtime = "gnat";
+
+    aliases = [
+        "adb"
+        "ads"
+    ];
+
+    compile = ''
+        ${pkg}/bin/gnatmake "$@" -o a.out
+    '';
+
+    run = ''
+        shift
+        ./a.out "$@"
+    '';
+
+    tests = [
+        (piston.mkTest {
+            files = {
+                "test.adb" = ''
+                    with Text_IO; use Text_IO;
+                    with Ada.Command_line; use Ada.Command_Line;
+                    procedure hello is
+                    begin
+                    Put_Line(Argument(1));
+                    end hello;
+                '';
+            };
+            args = ["OK"];
+            stdin = "";
+            packages = [];
+            main = "test.adb";
+        })
+    ];
+}