Add script stage

garlic/index.nix

@@ -72,6 +72,7 @@
     srun       = callPackage ./stages/srun.nix { };
     control    = callPackage ./stages/control.nix { };
     exec       = callPackage ./stages/exec.nix { };
+    script     = callPackage ./stages/script.nix { };
     extrae     = callPackage ./stages/extrae.nix { };
     valgrind   = callPackage ./stages/valgrind.nix { };
     perf       = callPackage ./stages/perf.nix { };

garlic/stages/script.nix

@@ -0,0 +1,23 @@
+{
+  stdenv
+}:
+
+{
+  script
+, shell ? "/bin/sh"
+}:
+
+stdenv.mkDerivation {
+  name = "script";
+  preferLocalBuild = true;
+  phases = [ "installPhase" ];
+  installPhase = ''
+    cat > $out <<'EOF'
+    #!${shell}
+
+    ${script}
+
+    EOF
+    chmod +x $out
+  '';
+}