Ultimaker 2 machine definition variation for Cura 2.2.x that uses RepRap gcode flavor instead of UltiGCode. Useful in combination with OctoPrint

ultimaker2_reprap.def.json

{
    "id": "ultimaker2_reprap",
    "version": 2,
    "name": "Ultimaker 2 (reprap)",
    "inherits": "ultimaker2",
    "metadata": {
        "visible": true,
        "author": "Ultimaker",
        "manufacturer": "Ultimaker",
        "category": "Ultimaker",
        "file_formats": "text/x-gcode",
        "icon": "icon_ultimaker2.png",
        "platform": "ultimaker2_platform.obj",
        "platform_texture": "Ultimaker2backplate.png",
        "platform_offset": [9, 0, 0],
        "has_materials": true,
        "preferred_material": "*pla*",
        "supported_actions": ["UpgradeFirmware"]
    },
    "overrides": {
        "material_print_temperature": {
            "enabled": "not (material_flow_dependent_temperature)"
        },
        "material_bed_temperature": {
            "enabled": "machine_heated_bed"
        },
        "material_diameter": {
            "enabled": "true"
        },
        "material_flow": {
            "enabled": "true"
        },
        "retraction_amount": {
            "enabled": "retraction_enable"
        },
        "retraction_speed": {
            "enabled": "retraction_enable"
        },
        "retraction_retract_speed": {
            "enabled": "retraction_enable"
        },
        "retraction_prime_speed": {
            "enabled": "retraction_enable"
        },
        "machine_gcode_flavor": {
            "default_value": "RepRap (Marlin/Sprinter)"
        },
        "machine_start_gcode": {
            "default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG1 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to bottom endstops\nG1 Z15.0 F9000 ;move the platform to 15mm\nG92 E0 ;zero the extruded length\nG1 F200 E10 ;extrude 10 mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\n;Put printing message on LCD screen\nM117 Printing..."
        },
        "machine_end_gcode": {
            "default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 Z+0.5 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nM84 ;steppers off\nG90 ;absolute positioning"
        }
    }
}