works with Cura 5.1.1

GcodeFileSplitter.py

@@ -11,6 +11,7 @@ logging.basicConfig(level=logging.DEBUG,
 FLOAT_OR_INT = r'-?\d+(\.\d*)?'
 
 RE_ENGINE_VERSION = re.compile(r'SteamEngine (\d+\.\d+\.\d+)')
+RE_ENGINE_V5 = re.compile(r'\n(.*SteamEngine main.*)\n')
 RE_LAYER_COUNT = re.compile(r';LAYER_COUNT:(\d+)', re.MULTILINE)
 RE_LAYER_NUMBER = re.compile(r';LAYER:(\d+)')
 RE_FOOTER_START = re.compile(r'(;TIME_ELAPSED:\d+\.\d+)\n[^;]', re.MULTILINE)
@@ -55,7 +56,18 @@ class GcodeFileAnalyzer:
         fullCode = '\n'.join(self.lines)
 
         versionMatch = RE_ENGINE_VERSION.search(fullCode)
-        self.curaVersion = tuple(int(v) for v in versionMatch.group(1).split('.'))
+        if versionMatch:
+            self.curaVersion = tuple(int(v) for v in versionMatch.group(1).split('.'))
+            logging.info('Cura version {self.curaVersion}')
+        else:
+            v5engineMatch = RE_ENGINE_V5.search(fullCode)
+            if v5engineMatch:
+                logging.info('Cura version not specified. Assuming 5.x')
+                logging.info(f' -> {v5engineMatch.group(1)}')
+                self.curaVersion = (5, 0, 0)
+            else:
+                raise ValueError('Could not find ";Generated with Cura_SteamEngine" '
+                                 'in GCODE. Can\'t proceed')
 
         # Find footer
         footerStartMatch = RE_FOOTER_START.search(fullCode)
@@ -240,5 +252,5 @@ if __name__ == '__main__':
     #                                     [124])
     # GcodeFileAnalyzer.SplitFileAtLayers(r"Q:\DIY\3Dprint\Models\Thingiverse\MoonLamp\gcode\moon5inches.gcode",
     #                                     [100, 200, 400, 600, 700])
-    GcodeFileAnalyzer.SplitFileAtLayers(r"Q:\DIY\3Dprint\Models\Pi\PiJukebox\bottom_2020-11-22\bottom.gcode",
-                                        [87])
+    GcodeFileAnalyzer.SplitFileAtLayers(r"Q:\DIY\3Dprint\Models\Benjamin\Vier_Cura5.1.1.gcode",
+                                        [42])