Get it all working

projects/public-dns/BUILD

@@ -1,9 +1,10 @@
 py_binary(
     name = "updater",
-    entry_point = "src/python/arrdem/updater/__main__.py",
+    main = "src/python/arrdem/updater/__main__.py",
     deps = [
         "//projects/gandi",
         py_requirement("jinja2"),
         py_requirement("pyyaml"),
-    ]
+        py_requirement("meraki"),
+    ],
 )

projects/public-dns/src/python/arrdem/updater/BUILD

@@ -1,12 +0,0 @@
-python_binary(
-  name='updater',
-	source='__main__.py',
-	dependencies=[
-	  "//src/resources/zonefiles",
-		"//src/python/gandi",
-		"//3rdparty/python:requests",
-		"//3rdparty/python:jinja2",
-		"//3rdparty/python:PyYAML",
-		"//3rdparty/python:meraki",
-	]
-)

projects/public-dns/src/python/arrdem/updater/__main__.py

@@ -2,6 +2,35 @@
 A quick and dirty public DNS script, super tightly coupled to my infrastructure.
 """
 
+import sys
+import os
+
+def module_not_found_helper(excepthook):
+    def _helper(type, value, traceback):
+        if isinstance(value, ModuleNotFoundError):
+            path_fragment = value.name.replace(".", os.path.sep)
+            flag = False
+            for e in sys.path:
+                init = os.path.join(e, path_fragment, "__init__.py")
+                namedfile = os.path.join(e, path_fragment + ".py")
+                if os.path.exists(init):
+                    print(f"Found candidate {init}", file=sys.stderr)
+                    flag |= True
+                else:
+                    print(f"{init} does not exist")
+
+                if os.path.exists(namedfile):
+                    print(f"Found candidate {namedfile}", file=sys.stderr)
+                    flag |= True
+                else:
+                    print(f"{namedfile} does not exist")
+            if not flag:
+                print(f"Found no candidates on the PYTHONPATH", file=sys.stderr)
+        excepthook(type, value, traceback)
+    return _helper
+
+sys.excepthook = module_not_found_helper(sys.excepthook)
+
 import argparse
 import re
 from pprint import pprint