catch ldap configuration and packaging errors and make them non fatal

archivebox/core/settings.py

@@ -6,9 +6,6 @@ import re
 import logging
 import tempfile
 
-import ldap
-from django_auth_ldap.config import LDAPSearch
-
 from pathlib import Path
 from django.utils.crypto import get_random_string
 
@@ -97,6 +94,10 @@ AUTHENTICATION_BACKENDS = [
 ]
 
 if LDAP:
+    try:
+        import ldap
+        from django_auth_ldap.config import LDAPSearch
+
         global AUTH_LDAP_SERVER_URI
         AUTH_LDAP_SERVER_URI = LDAP_SERVER_URI
 
@@ -124,6 +125,11 @@ if LDAP:
         AUTHENTICATION_BACKENDS = [
             'django_auth_ldap.backend.LDAPBackend',
         ]
+    except ModuleNotFoundError:
+        sys.stderr.write('[X] Error: Found LDAP=True config but LDAP packages not installed. You may need to run: pip install archivebox[ldap]\n\n')
+        # dont hard exit here. in case the user is just running "archivebox version" or "archivebox help", we still want those to work despite broken ldap
+        # sys.exit(1)
+
 
 ################################################################################
 ### Debug Settings