ci: temporarily add pure-sasl to impala conda dependencies

ci/deps/impala.yml

@@ -6,3 +6,5 @@ dependencies:
   - thrift_sasl
   - python-hdfs
   - boost
+  # TODO:remove when https://github.com/conda-forge/impyla-feedstock/pull/28 lands
+  - pure-sasl

ci/merge_and_update_env.sh

@@ -9,8 +9,8 @@ if [ "$#" -eq 0 ]; then
   exit 1
 fi
 
-# install conda-merge
-mamba install --name ibis conda-merge
+# install conda-merge, don't try to update already installed dependencies
+mamba install --freeze-installed --name ibis conda-merge
 
 additional_env_files=()
 

ibis/backends/impala/tests/test_client.py

@@ -26,7 +26,19 @@ def test_kerberos_deps_installed(env, test_data_db):
     # errors and occur, because there is no kerberos server in
     # the CI pipeline, but they imply our imports have succeeded.
     # See: https://github.com/ibis-project/ibis/issues/2342
-    with pytest.raises((AttributeError, TTransportException)):
+    excs = (AttributeError, TTransportException)
+    try:
+        # TLDR: puresasl is using kerberos, and not pykerberos
+        #
+        # see https://github.com/requests/requests-kerberos/issues/63
+        # for why both libraries exist
+        from kerberos import GSSError
+    except ImportError:
+        pass
+    else:
+        excs += (GSSError,)
+
+    with pytest.raises(excs):
         ibis.impala.connect(
             host=env.impala_host,
             database=test_data_db,