klipper: add calibrate_shaper script as a binary (#344956)

pkgs/servers/klipper/default.nix

@@ -4,6 +4,7 @@
 , python3
 , unstableGitUpdater
 , makeWrapper
+, writeShellScript
 }:
 
 stdenv.mkDerivation rec {
@@ -44,6 +45,18 @@ stdenv.mkDerivation rec {
       --replace 'GCC_CMD = "gcc"' 'GCC_CMD = "${stdenv.cc.targetPrefix}cc"'
   '';
 
+  pythonInterpreter =
+    (python3.withPackages (
+      p: with p; [
+        numpy
+        matplotlib
+      ]
+    )).interpreter;
+
+  pythonScriptWrapper = writeShellScript pname ''
+    ${pythonInterpreter} "@out@/lib/scripts/@script@" "$@"
+  '';
+
   # NB: We don't move the main entry point into `/bin`, or even symlink it,
   # because it uses relative paths to find necessary modules. We could wrap but
   # this is used 99% of the time as a service, so it's not worth the effort.
@@ -56,6 +69,8 @@ stdenv.mkDerivation rec {
     # under `klipper_path`
     cp -r $src/docs $out/lib/docs
     cp -r $src/config $out/lib/config
+    cp -r $src/scripts $out/lib/scripts
+    cp -r $src/klippy $out/lib/klippy
 
     # Add version information. For the normal procedure see https://www.klipper3d.org/Packaging.html#versioning
     # This is done like this because scripts/make_version.py is not available when sourceRoot is set to "${src.name}/klippy"
@@ -64,6 +79,12 @@ stdenv.mkDerivation rec {
     mkdir -p $out/bin
     chmod 755 $out/lib/klipper/klippy.py
     makeWrapper $out/lib/klipper/klippy.py $out/bin/klippy --chdir $out/lib/klipper
+
+    substitute "$pythonScriptWrapper" "$out/bin/klipper-calibrate-shaper" \
+      --subst-var "out" \
+      --subst-var-by "script" "calibrate_shaper.py"
+    chmod 755 "$out/bin/klipper-calibrate-shaper"
+
     runHook postInstall
   '';