curaLulzbot: 15.02.1-1.03-5064 -> 3.6.18

Move Cura Lulzbot Edition to be based on the same generation of the
codebase as the upstream (Ultimaker) branch, away from a many-year-old
legacy tree.

Since prior Lulzbot Edition packaging simply wrapped binaries unpacked
from Debian binary packages, doing this right requires forking the same
dependencies that Lulzbot has branched themselves as well.

pkgs/applications/misc/cura/lulzbot.nix

@@ -1,58 +1,66 @@
-{ stdenv, fetchurl, dpkg, bash, python27Packages }:
+{ lib, fetchgit, curaengineLulzbot, cmake, jq, python3Packages, qtbase, qtquickcontrols2 }:
 
 let
-  py = python27Packages;
+  # admittedly, we're using (printer firmware) blobs when we could compile them ourselves.
+  curaBinaryDataVersion = "3.6.18"; # Marlin v2.0.0.144. Keep this accurate wrt. the below.
+  curaBinaryData = fetchgit {
+    url = https://code.alephobjects.com/diffusion/CBD/cura-binary-data.git;
+    rev = "cdc046494bbfe1f65bfb34659a257eef9a0100a0";
+    sha256 = "0v0s036gxdjiglas2yzw95alv60sw3pq5k1zrrhmw9mxr4irrblb";
+  };
+  curaengine = curaengineLulzbot;
+  libarcus = python3Packages.libarcusLulzbot;
+  uranium = python3Packages.uraniumLulzbot;
+  libsavitar = python3Packages.libsavitarLulzbot;
 in
-stdenv.mkDerivation rec {
+python3Packages.buildPythonApplication rec {
   name = "cura-lulzbot-${version}";
-  version = "15.02.1-1.03-5064";
+  version = "3.6.18";
 
-  src =
-    if stdenv.hostPlatform.system == "x86_64-linux" then
-      fetchurl {
-        url = "https://download.alephobjects.com/ao/aodeb/dists/jessie/main/binary-amd64/cura_${version}_amd64.deb";
-        sha256 = "1gsfidg3gim5pjbl82vkh0cw4ya253m4p7nirm8nr6yjrsirkzxg";
-      }
-    else if stdenv.hostPlatform.system == "i686-linux" then
-      fetchurl {
-        url = "http://download.alephobjects.com/ao/aodeb/dists/jessie/main/binary-i386/cura_${version}_i386.deb";
-        sha256 = "0xd3df6bxq4rijgvsqvps454jkc1nzhxbdzzj6j2w317ppsbhyc1";
-      }
-    else throw "${name} is not supported on ${stdenv.hostPlatform.system}";
+  src = fetchgit {
+    url = https://code.alephobjects.com/source/cura-lulzbot.git;
+    rev = "71f1ac5a2b9f535175a3858a565930348358a9ca";
+    sha256 = "0by06fpxvdgy858lwhsccbmvkdq67j2s1cz8v6jnrnjrsxk7vzka";
+  };
 
-  python_deps = with py; [ pyopengl pyserial numpy wxPython30 power setuptools ];
-  pythonPath = python_deps;
-  propagatedBuildInputs = python_deps;
-  buildInputs = [ dpkg bash py.wrapPython ];
+  format = "other"; # using cmake to build
+  buildInputs = [ qtbase qtquickcontrols2 ];
+  # numpy-stl temporarily disabled due to https://code.alephobjects.com/T8415
+  propagatedBuildInputs = with python3Packages; [ pyserial requests zeroconf ] ++ [ libsavitar uranium libarcus ]; # numpy-stl
+  nativeBuildInputs = [ cmake python3Packages.wrapPython ];
 
-  phases = [ "unpackPhase" "installPhase" ];
-  unpackPhase = "dpkg-deb -x ${src} ./";
+  cmakeFlags = [
+    "-DURANIUM_DIR=${uranium.src}"
+    "-DCURA_VERSION=${version}"
+  ];
 
-  installPhase = ''
-    mkdir -p $out/bin
-    cp -r usr/share $out/share
-    find $out/share -type f -exec sed -i 's|/usr/share/cura|$out/share/cura|g' "{}" \;
-
-    cat <<EOT > $out/bin/cura
-    #!${bash}/bin/bash
-    PYTHONPATH=$PYTHONPATH:$out/share/cura ${py.python}/bin/python $out/share/cura/cura.py "\$@"
-    EOT
-
-    chmod 555 $out/bin/cura
+  postPatch = ''
+    sed -i 's,/python''${PYTHON_VERSION_MAJOR}/dist-packages,/python''${PYTHON_VERSION_MAJOR}.''${PYTHON_VERSION_MINOR}/site-packages,g' CMakeLists.txt
+    sed -i 's, executable_name = .*, executable_name = "${curaengine}/bin/CuraEngine",' plugins/CuraEngineBackend/CuraEngineBackend.py
   '';
 
-  meta = with stdenv.lib; {
-    description = "3D printing host software for the Lulzbot";
+  preFixup = ''
+    substituteInPlace "$out/bin/cura-lulzbot" --replace 'import cura.CuraApplication' 'import Savitar; import cura.CuraApplication'
+    ln -sT "${curaBinaryData}/cura/resources/firmware" "$out/share/cura/resources/firmware"
+    ln -sT "${uranium}/share/uranium" "$out/share/uranium"
+    ${jq}/bin/jq --arg out "$out" '.build=$out' >"$out/version.json" <<'EOF'
+    ${builtins.toJSON {
+      cura = version;
+      cura_version = version;
+      binarydata = curaBinaryDataVersion;
+      engine = curaengine.version;
+      libarcus = libarcus.version;
+      libsavitar = libsavitar.version;
+      uranium = uranium.version;
+    }}
+    EOF
+  '';
 
-     longDescription = ''
-       Cura LulzBot Edition is a fork of the 3D printing/slicing
-       software from Ultimaker, with changes to support 3D printers
-       from Aleph Objects.
-     '';
-
-    homepage = https://www.lulzbot.com/cura/;
-    license = licenses.agpl3;
+  meta = with lib; {
+    description = "3D printer / slicing GUI built on top of the Uranium framework";
+    homepage = https://code.alephobjects.com/diffusion/CURA/;
+    license = licenses.agpl3;  # a partial relicense to LGPL has happened, but not certain that all AGPL bits are expunged
     platforms = platforms.linux;
-    maintainers = with maintainers; [ pjones ];
+    maintainers = with maintainers; [ chaduffy ];
   };
 }