replace Py3 exception passing to logger with py2 version

Author: mr-c

schema_salad/main.py

@@ -2,6 +2,7 @@
 import argparse
 import logging
 import sys
+import traceback
 import pkg_resources  # part of setuptools
 from . import schema
 from . import jsonld_context
@@ -103,7 +104,7 @@ def main(argsl=None):  # type: (List[str]) -> int
             schema_raw_doc, schema_uri)
     except (validate.ValidationException) as e:
         _logger.error("Schema `%s` failed link checking:\n%s",
-                      args.schema, e, exc_info=(e if args.debug else False))
+                args.schema, e, exc_info=(True if args.debug else False))
         _logger.debug("Index is %s", metaschema_loader.idx.keys())
         _logger.debug("Vocabulary is %s", metaschema_loader.vocab.keys())
         return 1
@@ -148,7 +149,8 @@ def main(argsl=None):  # type: (List[str]) -> int
 
     if isinstance(avsc_names, Exception):
         _logger.error("Schema `%s` error:\n%s", args.schema,
-                      avsc_names, exc_info=(avsc_names if args.debug else False))
+                avsc_names, exc_info=((type(avsc_names), avsc_names,
+                    None) if args.debug else None))
         if args.print_avro:
             print(json.dumps(avsc_obj, indent=4))
         return 1

schema_salad/ref_resolver.py

@@ -553,7 +553,7 @@ def resolve_all(self, document, base_url, file_base=None, checklinks=True):
                     document[key], _ = loader.resolve_all(
                         val, base_url, file_base=file_base, checklinks=False)
             except validate.ValidationException as v:
-                _logger.warn("loader is %s", id(loader), exc_info=v)
+                _logger.warn("loader is %s", id(loader), exc_info=True)
                 raise validate.ValidationException("(%s) (%s) Validation error in field %s:\n%s" % (
                     id(loader), file_base, key, validate.indent(str(v))))
 
@@ -577,7 +577,7 @@ def resolve_all(self, document, base_url, file_base=None, checklinks=True):
                             val, base_url, file_base=file_base, checklinks=False)
                         i += 1
             except validate.ValidationException as v:
-                _logger.warn("failed", exc_info=v)
+                _logger.warn("failed", exc_info=True)
                 raise validate.ValidationException("(%s) (%s) Validation error in position %i:\n%s" % (
                     id(loader), file_base, i, validate.indent(str(v))))