Always use mono on Linux to call asn1scc

opengeode/Asn1scc.py

@@ -60,14 +60,25 @@ def parse_asn1(*files, **options):
     flags = options.get('flags', [ASN1.AstOnly])
     assert isinstance(ast_version, ASN1)
     assert isinstance(flags, list)
-    if os.name == 'posix' and hasattr(sys, 'frozen'):
+    #if os.name == 'posix' and hasattr(sys, 'frozen'):
         # Frozen Linux binaries are expected to use the frozen ASN.1 compiler
-        asn1exe = 'asn1scc'
-    else:
-        asn1exe = 'asn1.exe'
-    path_to_asn1scc = spawn.find_executable(asn1exe)
+        # No: there are issues with freezing the .NET applications - discard
+    #     asn1exe = 'asn1scc'
+    #else:
+    #    asn1exe = 'asn1.exe'
+    path_to_asn1scc = spawn.find_executable('asn1.exe')
+
     if not path_to_asn1scc:
         raise TypeError('ASN.1 Compiler not found in path')
+    if os.name == 'posix':
+        path_to_mono = spawn.find_executable('mono')
+        if not path_to_mono:
+            raise TypeErorr('"mono" not found in path. Please install it.')
+        binary = path_to_mono
+        arg0 = path_to_asn1scc
+    else:
+        binary = path_to_asn1scc
+        arg0 = ''
     asn1scc_root = os.path.abspath(os.path.dirname(path_to_asn1scc))
     # Create a temporary directory to store dataview.py and import it
     tempdir = tempfile.mkdtemp()
@@ -81,12 +92,12 @@ def parse_asn1(*files, **options):
 
     stg = asn1scc_root + os.sep + 'python.stg'
 
-    args = ['-customStgAstVerion', str(ast_version.value),
+    args = [arg0, '-customStgAstVerion', str(ast_version.value),
             '-customStg', stg + ':' + filepath] + list(*files)
     asn1scc = QProcess()
     LOG.debug(os.getcwd())
-    LOG.debug(path_to_asn1scc + ' ' + ' '.join(args))
-    asn1scc.start(path_to_asn1scc, args)
+    LOG.debug(binary + ' ' + ' '.join(args))
+    asn1scc.start(binary, args)
     if not asn1scc.waitForStarted():
         raise TypeError('Could not start ASN.1 Compiler')
     if not asn1scc.waitForFinished():