added optional unix script to run imagetool (#70)

Author: ddsharpe

imagetool/src/main/bin/imagetool.sh

@@ -0,0 +1,58 @@
+#
+#Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+#
+#Licensed under the Universal Permissive License v 1.0 as shown at http://oss.oracle.com/licenses/upl.
+#
+# imagetool.sh
+
+set -e
+
+#
+# Make sure that the JAVA_HOME environment variable is set to point to a
+# JDK 8 or higher JVM (and that it isn't OpenJDK).
+#
+if [ -z "${JAVA_HOME}" ]; then
+  echo "Please set the JAVA_HOME environment variable to match the location of your Java 8 installation." >&2
+  exit -1
+elif [ ! -d "${JAVA_HOME}" ]; then
+  echo "Your JAVA_HOME environment variable points to a non-existent directory: ${JAVA_HOME}" >&2
+  exit -1
+fi
+
+if [ -x "${JAVA_HOME}/bin/java" ]; then
+  JAVA_EXE=${JAVA_HOME}/bin/java
+else
+  echo "Java executable at ${JAVA_HOME}/bin/java either does not exist or is not executable" >&2
+  exit -1
+fi
+
+JVM_OUTPUT=`${JAVA_EXE} -version 2>&1`
+case "${JVM_OUTPUT}" in
+  *OpenJDK*)
+    echo "JAVA_HOME ${JAVA_HOME} contains OpenJDK, which is not supported" >&2
+    exit -1
+    ;;
+esac
+
+function read_link() {
+PREV_DIR=`pwd`
+CHASE_LINK=$1
+cd `dirname $CHASE_LINK`
+CHASE_LINK=`basename $CHASE_LINK`
+while [ -L "$CHASE_LINK" ]
+do
+  CHASE_LINK=`readlink $CHASE_LINK`
+  cd `dirname $CHASE_LINK`
+  CHASE_LINK=`basename $CHASE_LINK`
+done
+_DIR=`pwd -P`
+RESULT_PATH=$_DIR/$CHASE_LINK
+cd $PREV_DIR
+echo $RESULT_PATH
+}
+
+script_dir=$( dirname "$( read_link "${BASH_SOURCE[0]}" )" )
+IMAGETOOL_HOME=`cd "${script_dir}/.." ; pwd`
+export IMAGETOOL_HOME
+${JAVA_HOME}/bin/java -cp "${IMAGETOOL_HOME}/lib/*" -Djava.util.logging.config.file=${IMAGETOOL_HOME}/bin/logging.properties com.oracle.weblogic.imagetool.cli.CLIDriver $@
+

imagetool/src/main/bin/setup.sh

@@ -9,11 +9,11 @@ umask 27
 # Make sure that the JAVA_HOME environment variable is set to point to a
 # JDK 8 or higher JVM (and that it isn't OpenJDK).
 #
-if [ "${JAVA_HOME}" = "" ]; then
-  echo "Please set the JAVA_HOME environment variable to point to a Java 8 installation" >&2
+if [ -z "${JAVA_HOME}" ]; then
+  echo "Please set the JAVA_HOME environment variable to match the location of your Java 8 installation." >&2
   return
 elif [ ! -d "${JAVA_HOME}" ]; then
-  echo "Your JAVA_HOME environment variable to points to a non-existent directory: ${JAVA_HOME}" >&2
+  echo "Your JAVA_HOME environment variable points to a non-existent directory: ${JAVA_HOME}" >&2
   return
 fi
 

imagetool/src/main/java/com/oracle/weblogic/imagetool/cli/menu/UpdateImage.java

@@ -29,7 +29,7 @@
 
 @Command(
         name = "update",
-        description = "Update WebLogic docker image with selected patches",
+        description = "Update an existing docker image that was previously created with the image tool",
         requiredOptionMarker = '*',
         abbreviateSynopsis = true
 )