[enhancement] Issue a more compact message when JSON schema validation fails

reframe/core/config.py

@@ -447,8 +447,10 @@ def validate(self):
  try:
  jsonschema.validate(site_config, self._schema)
  except jsonschema.ValidationError as e:
- raise ConfigError(f"could not validate configuration files: "
- f"'{self._sources}'") from e
+ getlogger().debug(str(e))
+ sources = ', '.join(f'`{f}`' for f in self._sources)
+ raise ConfigError('could not validate configuration files: '
+ f'{sources}') from e
 
  def _warn_variables(config, opt_path):
  opt_path = '/'.join(opt_path + ['variables'])

reframe/core/exceptions.py

@@ -8,6 +8,7 @@
 #
 
 import inspect
+import jsonschema
 import os
 
 import reframe
@@ -54,7 +55,10 @@ def message(self):
  def __str__(self):
  ret = self._message or ''
  if self.__cause__ is not None:
- ret += ': ' + str(self.__cause__)
+ if isinstance(self.__cause__, jsonschema.ValidationError):
+ ret += ': ' + self.__cause__.message
+ else:
+ ret += ': ' + str(self.__cause__)
 
  return ret
 

reframe/frontend/autodetect.py

@@ -106,6 +106,7 @@ def _load_info(filename, schema=None):
  )
  return {}
  except jsonschema.ValidationError as e:
+ getlogger().debug(str(e))
  raise ConfigError(
  f'could not validate meta-config file {filename!r}'
  ) from e

reframe/frontend/reporting/__init__.py

@@ -215,12 +215,12 @@ def _restore_session(filename):
  except KeyError:
  found_ver = 'n/a'
 
- getlogger().verbose(f'JSON validation error: {e}')
+ getlogger().debug(str(e))
  raise ReframeError(
  f'failed to validate report {filename!r}: {e.args[0]} '
  f'(check report data version: required {DATA_VERSION}, '
  f'found: {found_ver})'
- ) from None
+ ) from e
 
  return _RestoredSessionInfo(report)
 

unittests/resources/config/settings.py

@@ -226,12 +226,6 @@ def hostname():
  'modules': ['PrgEnv-cray'],
  'features': ['cxx14', 'mpi'],
  },
- {
- 'name': 'builtin',
- 'cc': 'cc',
- 'cxx': '',
- 'ftn': ''
- },
  {
  'name': 'e0',
  'modules': ['m0']