add fallback version detection mode

archivebox/config.py

@@ -377,7 +377,15 @@ ALLOWED_IN_OUTPUT_DIR = {
 }
 
 def get_version(config):
-    return importlib.metadata.version(__package__ or 'archivebox')
+    try:
+        return importlib.metadata.version(__package__ or 'archivebox')
+    except importlib.metadata.PackageNotFoundError:
+        pyproject_config = (config['PACKAGE_DIR'] / 'pyproject.toml').read_text()
+        for line in pyproject_config:
+            if line.startswith('version = '):
+                return line.split(' = ', 1)[-1].strip('"')
+
+    raise Exception('Failed to detect installed archivebox version!')
 
 def get_commit_hash(config):
     try:

archivebox/main.py

@@ -217,8 +217,8 @@ def version(quiet: bool=False,
     print(VERSION)
     
     if not quiet:
-        # 0.6.3
-        # ArchiveBox v0.6.3 Cpython Linux Linux-4.19.121-linuxkit-x86_64-with-glibc2.28 x86_64 (in Docker) (in TTY)
+        # 0.7.1
+        # ArchiveBox v0.7.1 Cpython Linux Linux-4.19.121-linuxkit-x86_64-with-glibc2.28 x86_64 (in Docker) (in TTY)
         # DEBUG=False IN_DOCKER=True IN_QEMU=False IS_TTY=True TZ=UTC FS_ATOMIC=True FS_REMOTE=False FS_PERMS=644 FS_USER=501:20 SEARCH_BACKEND=ripgrep
         
         p = platform.uname()