config add: fix parsing of validator error to infer type from oneOf (#29475)

2 files changed, 10 insertions, 4 deletions

diff --git a/lib/spack/spack/config.py b/lib/spack/spack/config.py
index f3fc73e4b4..da19aab2dc 100644
--- a/lib/spack/spack/config.py
+++ b/lib/spack/spack/config.py
@@ -1090,11 +1090,11 @@ def get_valid_type(path):
         jsonschema_error = e.validation_error
         if jsonschema_error.validator == 'type':
             return types[jsonschema_error.validator_value]()
-        elif jsonschema_error.validator == 'anyOf':
+        elif jsonschema_error.validator in ('anyOf', 'oneOf'):
             for subschema in jsonschema_error.validator_value:
-                anyof_type = subschema.get('type')
-                if anyof_type is not None:
-                    return types[anyof_type]()
+                schema_type = subschema.get('type')
+                if schema_type is not None:
+                    return types[schema_type]()
     else:
         return type(None)
     raise ConfigError("Cannot determine valid type for path '%s'." % path)
diff --git a/lib/spack/spack/test/cmd/config.py b/lib/spack/spack/test/cmd/config.py
index 63c3cab92a..bf77d78133 100644
--- a/lib/spack/spack/test/cmd/config.py
+++ b/lib/spack/spack/test/cmd/config.py
@@ -239,6 +239,12 @@ def test_config_add_ordered_dict(mutable_empty_config):
 """
 
 
+def test_config_add_interpret_oneof(mutable_empty_config):
+    # Regression test for a bug that would raise a validation error
+    config('add', 'packages:all:target:[x86_64]')
+    config('add', 'packages:all:variants:~shared')
+
+
 def test_config_add_invalid_fails(mutable_empty_config):
     config('add', 'packages:all:variants:+debug')
     with pytest.raises(