Github user jsnowacki commented on a diff in the pull request:
https://github.com/apache/spark/pull/19370#discussion_r147771692
--- Diff: bin/find-spark-home.cmd ---
@@ -0,0 +1,44 @@
+@echo off
+
+rem
+rem Licensed to the Apache Software Foundation (ASF) under one or more
+rem contributor license agreements. See the NOTICE file distributed with
+rem this work for additional information regarding copyright ownership.
+rem The ASF licenses this file to You under the Apache License, Version 2.0
+rem (the "License"); you may not use this file except in compliance with
+rem the License. You may obtain a copy of the License at
+rem
+rem http://www.apache.org/licenses/LICENSE-2.0
+rem
+rem Unless required by applicable law or agreed to in writing, software
+rem distributed under the License is distributed on an "AS IS" BASIS,
+rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied.
+rem See the License for the specific language governing permissions and
+rem limitations under the License.
+rem
+
+rem Path to Python script finding SPARK_HOME
+set FIND_SPARK_HOME_SCRIPT=%~dp0find_spark_home.py
+
+rem Default to standard python interpreter unless told otherwise
+set PYTHON_RUNNER=python
+if not "x%PYSPARK_DRIVER_PYTHON%" =="x" (
+ set PYTHON_RUNNER=%PYSPARK_DRIVER_PYTHON%
+)
+
+rem Only attempt to find SPARK_HOME if it is not set.
+if "x%SPARK_HOME%"=="x" (
+ rem We are pip installed, use the Python script to resolve a reasonable
SPARK_HOME
+ if exist "%FIND_SPARK_HOME_SCRIPT%" (
+ rem If there is no python installed it will fail with message:
+ rem 'python' is not recognized as an internal or external command,
+ for /f %%i in ('%PYTHON_RUNNER% %FIND_SPARK_HOME_SCRIPT%') do set
SPARK_HOME=%%i
--- End diff --
Valid observation; I'll add it.
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