Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/3916#discussion_r25294618
--- Diff:
launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java ---
@@ -0,0 +1,359 @@
+/*
+ * 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.
+ */
+
+package org.apache.spark.launcher;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileFilter;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.jar.JarFile;
+import java.util.regex.Pattern;
+
+import static org.apache.spark.launcher.CommandBuilderUtils.*;
+
+/**
+ * Abstract command builder that defines common functionality for all
builders.
+ */
+abstract class AbstractCommandBuilder {
+
+ boolean verbose;
+ String appName;
+ String appResource;
+ String deployMode;
+ String javaHome;
+ String mainClass;
+ String master;
+ String propertiesFile;
+ final List<String> appArgs;
+ final List<String> jars;
+ final List<String> files;
+ final List<String> pyFiles;
+ final Map<String, String> childEnv;
+ final Map<String, String> conf;
+
+ public AbstractCommandBuilder() {
+ this(Collections.<String, String>emptyMap());
+ }
+
+ public AbstractCommandBuilder(Map<String, String> env) {
+ this.appArgs = new ArrayList<String>();
+ this.childEnv = new HashMap<String, String>(env);
+ this.conf = new HashMap<String, String>();
+ this.files = new ArrayList<String>();
+ this.jars = new ArrayList<String>();
+ this.pyFiles = new ArrayList<String>();
+ }
+
+ /**
+ * Builds the command like to execute.
--- End diff --
what does `command like` mean? is this a typo?
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