Consistently invoke bash with /usr/bin/env bash in scripts to make code more...

Consistently invoke bash with /usr/bin/env bash in scripts to make code more portable (JIRA Ticket SPARK-817)

bin/compute-classpath.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more

docs/spark-simple-tutorial.md

@@ -13,7 +13,7 @@ title: Tutorial - Running a Simple Spark Application
 
 3. Edit the ~/SparkTest/sbt/sbt file to look like this:
 
-        #!/bin/bash
+        #!/usr/bin/env bash
         java -Xmx800M -XX:MaxPermSize=150m -jar $(dirname $0)/sbt-launch-*.jar "$@"
 
 4. To build a Spark application, you need Spark and its dependencies in a single Java archive (JAR) file. Create this JAR in Spark's main directory with sbt as:

ec2/deploy.generic/root/mesos-ec2/ec2-variables.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 # These variables are automatically filled in by the mesos-ec2 script.
 export MESOS_MASTERS="{{master_list}}"

ec2/deploy.generic/root/spark-ec2/ec2-variables.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
 # These variables are automatically filled in by the mesos-ec2 script.
 export MESOS_MASTERS="{{master_list}}"

repl-bin/src/deb/bin/run

-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more

repl-bin/src/deb/bin/spark-executor

-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more

repl-bin/src/deb/bin/spark-shell

-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more

run

-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more

sbt/sbt

-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more

spark-shell

-#!/bin/bash --posix
+#!/usr/bin/env bash
 
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
@@ -25,6 +25,9 @@
 #    -c <cores>    Set the number of cores for REPL to use
 #
 
+# Enter posix mode for bash
+set -o posix
+
 FWDIR="`dirname $0`"
 
 for o in "$@"; do