1 files changed, 74 insertions, 0 deletions
diff --git a/python/pyspark/find_spark_home.py b/python/pyspark/find_spark_home.py
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+++ b/python/pyspark/find_spark_home.py
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+#!/usr/bin/env python
+
+#
+# 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.
+#
+
+# This script attempt to determine the correct setting for SPARK_HOME given
+# that Spark may have been installed on the system with pip.
+
+from __future__ import print_function
+import os
+import sys
+
+
+def _find_spark_home():
+    """Find the SPARK_HOME."""
+    # If the enviroment has SPARK_HOME set trust it.
+    if "SPARK_HOME" in os.environ:
+        return os.environ["SPARK_HOME"]
+
+    def is_spark_home(path):
+        """Takes a path and returns true if the provided path could be a reasonable SPARK_HOME"""
+        return (os.path.isfile(os.path.join(path, "bin/spark-submit")) and
+                (os.path.isdir(os.path.join(path, "jars")) or
+                 os.path.isdir(os.path.join(path, "assembly"))))
+
+    paths = ["../", os.path.dirname(os.path.realpath(__file__))]
+
+    # Add the path of the PySpark module if it exists
+    if sys.version < "3":
+        import imp
+        try:
+            module_home = imp.find_module("pyspark")[1]
+            paths.append(module_home)
+            # If we are installed in edit mode also look two dirs up
+            paths.append(os.path.join(module_home, "../../"))
+        except ImportError:
+            # Not pip installed no worries
+            pass
+    else:
+        from importlib.util import find_spec
+        try:
+            module_home = os.path.dirname(find_spec("pyspark").origin)
+            paths.append(module_home)
+            # If we are installed in edit mode also look two dirs up
+            paths.append(os.path.join(module_home, "../../"))
+        except ImportError:
+            # Not pip installed no worries
+            pass
+
+    # Normalize the paths
+    paths = [os.path.abspath(p) for p in paths]
+
+    try:
+        return next(path for path in paths if is_spark_home(path))
+    except StopIteration:
+        print("Could not find valid SPARK_HOME while searching {0}".format(paths), file=sys.stderr)
+        exit(-1)
+
+if __name__ == "__main__":
+    print(_find_spark_home())