more settings loading tweaks and improvements

archivebox/__init__.py

@@ -1,4 +1,30 @@
 __package__ = 'archivebox'
 
-
 from .monkey_patches import *
+
+import os
+import importlib
+from pathlib import Path
+
+
+PACKAGE_DIR = Path(__file__).resolve().parent    # archivebox source code dir
+DATA_DIR = Path(os.curdir).resolve()             # archivebox user data dir
+
+
+def _detect_installed_version():
+    try:
+        return importlib.metadata.version(__package__ or 'archivebox')
+    except importlib.metadata.PackageNotFoundError:
+        try:
+            pyproject_config = (PACKAGE_DIR / 'pyproject.toml').read_text()
+            for line in pyproject_config:
+                if line.startswith('version = '):
+                    return line.split(' = ', 1)[-1].strip('"')
+        except FileNotFoundError:
+            # building docs, pyproject.toml is not available
+            return 'dev'
+
+    raise Exception('Failed to detect installed archivebox version!')
+
+
+__version__ = _detect_installed_version()