Add ifexgen_dbus command and required dependencies

l. ifexgen_dbus is a frontend / executable command, defined in the
package information (setup.py) and which calls the actual code.  I just
followed the same pattern as for ifexgen.

2. Rename D-Bus (correct spelling) to DBus (wrong spelling)
   because...python reasons :(

Signed-off-by: Gunnar Andersson <gunnar_dev@[email protected]>

ifex/scripts/generator_dbus.py

@@ -0,0 +1,23 @@
+# SPDX-FileCopyrightText: Copyright (c) 2023 MBition GmbH.
+# SPDX-License-Identifier: MPL-2.0
+
+# User-invocation script for D-Bus generation
+# (small wrapper around the main implementation)
+
+from ifex.model.ifex_parser import get_ast_from_yaml_file
+from ifex.generators.DBus import dbus_generator
+import argparse, dacite
+
+def ifex_dbus_generator_run():
+    parser = argparse.ArgumentParser(description='Runs IFEX to D-Bus XML translator.')
+    parser.add_argument('input', metavar='ifex-input-file', type=str, help='path to input IFEX (YAML) file')
+
+    try:
+        args = parser.parse_args()
+        dbus_generator.main_generate(args.input)
+
+    except dacite.UnexpectedDataError as e:
+        print(f"ERROR: Read error resulting from {filename}: {e}")
+
+if __name__ == "__main__":
+    ifex_dbus_generator_run()

requirements.txt

@@ -1,6 +1,7 @@
 attrs==22.1.0
 iniconfig==1.1.1
 Jinja2==3.1.2
+lxml
 MarkupSafe==2.1.1
 packaging==21.3
 pluggy==1.0.0

setup.py

@@ -26,5 +26,6 @@ def get_template_files():
       entry_points='''
             [console_scripts]
             ifexgen=ifex.scripts.generator:ifex_generator_run
+            ifexgen_dbus=ifex.scripts.generator_dbus:ifex_dbus_generator_run
       '''
       )