ci: conditionally skip python and frontend tests (#12583)

* ci: conditionally skip python tests

* parametrize check script and implement for frontend

* add missing script

* fix incorrect check

* move CHECKS to ARGS and fix typo

* fix SC2086 nit

scripts/ci_check_no_file_changes.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Usage instructions:
+#
+# to check for python changes, run with CHECKS=python
+# To check for frontend changes, run with CHECKS=frontend
+# To check for python and frontend changes, run with CHECKS="python frontend"
+
+URL="https://api.github.com/repos/${GITHUB_REPO}/pulls/${PR_NUMBER}/files"
+FILES=$(curl -s -X GET -G "${URL}" | jq -r '.[] | .filename')
+
+cat<<EOF
+CHANGED FILES:
+$FILES
+
+EOF
+
+for CHECK in "$@"
+do
+  if [[ ${CHECK} == "python" ]]; then
+    REGEX="(^tests\/|^superset\/|^setup\.py|^requirements\/.+\.txt)"
+    echo "Searching for changes in python files"
+  elif [[ ${CHECK} == "frontend" ]]; then
+    REGEX="(^superset-frontend\/)"
+    echo "Searching for changes in frontend files"
+  else
+    echo "Invalid check: \"${CHECK}\". Falling back to exiting with FAILURE code"
+    exit 1
+  fi
+
+  if [[ "${FILES}" =~ ${REGEX} ]]; then
+    echo "Detected changes... Exiting with FAILURE code"
+    exit 1
+  fi
+done
+echo "No changes detected... Exiting with SUCCESS code"
+exit 0