Decouple the Gramps core from GObject

Author: bartfeenstra

gramps/gen/const.py

@@ -39,7 +39,12 @@
 
 LOG = logging.getLogger(".")
 
-from gi.repository import GLib
+try:
+    from gi.repository import GLib
+
+    _GOBJECT_AVAILABLE = True
+except ModuleNotFoundError:
+    _GOBJECT_AVAILABLE = False
 
 # -------------------------------------------------------------------------
 #
@@ -117,8 +122,12 @@
             shutil.move(OLD_HOME, USER_DATA)
 else:
     USER_HOME = get_env_var("HOME")
-    USER_DATA = os.path.join(GLib.get_user_data_dir(), "gramps")
-    USER_CONFIG = os.path.join(GLib.get_user_config_dir(), "gramps")
+    USER_DATA = os.path.join(
+        GLib.get_user_data_dir() if _GOBJECT_AVAILABLE else USER_HOME, "gramps"
+    )
+    USER_CONFIG = os.path.join(
+        GLib.get_user_config_dir() if _GOBJECT_AVAILABLE else USER_HOME, "gramps"
+    )
     # Copy the database directory into the XDG directory.
     OLD_HOME = os.path.join(USER_HOME, ".gramps")
     if os.path.exists(OLD_HOME):
@@ -129,14 +138,12 @@
             if os.path.exists(db_dir):
                 shutil.copytree(db_dir, os.path.join(USER_DATA, "grampsdb"))
 
-USER_CACHE = os.path.join(GLib.get_user_cache_dir(), "gramps")
+USER_CACHE = os.path.join(GLib.get_user_cache_dir(), "gramps") if _GOBJECT_AVAILABLE else os.path.join(USER_HOME, "cache")
 
 if "SAFEMODE" in os.environ:
     USER_CONFIG = get_env_var("SAFEMODE")
 
-USER_PICTURES = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_PICTURES)
-if not USER_PICTURES:
-    USER_PICTURES = USER_DATA
+USER_PICTURES = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_PICTURES) if _GOBJECT_AVAILABLE else USER_DATA
 
 VERSION_DIR_NAME = "gramps%s%s" % (VERSION_TUPLE[0], VERSION_TUPLE[1])
 VERSION_DIR = os.path.join(USER_CONFIG, VERSION_DIR_NAME)

gramps/gen/utils/requirements.py

@@ -25,13 +25,6 @@
 # -------------------------------------------------------------------------
 from importlib.util import find_spec
 
-# -------------------------------------------------------------------------
-#
-# GTK modules
-#
-# -------------------------------------------------------------------------
-import gi
-
 # -------------------------------------------------------------------------
 #
 # Gramps modules
@@ -90,9 +83,11 @@ def _test_gi(self, module, version):
         Test to see if a particular version of a module is available.
         """
         try:
+            import gi
+
             gi.require_version(module, version)
             return True
-        except ValueError:
+        except (ModuleNotFoundError, ValueError):
             return False
 
     def check_exe(self, executable):