NIFI-2063 Adjusting handling of service install

by using script that delegates to installed nifi.sh at NIFI_HOME. Prohibit installation of service for Cygwin and Darwin environments that are guaranteed to not support it.

This closes #561

Signed-off-by: James Wing <jvwing@gmail.com>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-resources/src/main/resources/bin/nifi.sh

@@ -14,10 +14,6 @@
 #    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.
-#
-# chkconfig: 2345 20 80
-# description: Apache NiFi is a dataflow system based on the principles of Flow-Based Programming.
-#
 
 # Script structure inspired from Apache Karaf and other Apache projects with similar startup approaches
 
@@ -142,23 +138,73 @@ init() {
 
 
 install() {
+    detectOS
+
+    if [ "${darwin}" = "true"  ] || [ "${cygwin}" = "true" ]; then
+        echo 'Installing Apache NiFi as a service is not supported on OS X or Cygwin.'
+        exit 1
+    fi
+
     SVC_NAME=nifi
     if [ "x$2" != "x" ] ; then
         SVC_NAME=$2
     fi
 
-        SVC_FILE="/etc/init.d/${SVC_NAME}"
-        cp "$0" "${SVC_FILE}"
-        sed -i s:NIFI_HOME=.*:NIFI_HOME="${NIFI_HOME}": "${SVC_FILE}"
-        sed -i s:PROGNAME=.*:PROGNAME="${SCRIPT_NAME}": "${SVC_FILE}"
+    initd_dir='/etc/init.d'
+    SVC_FILE="${initd_dir}/${SVC_NAME}"
+
+    if [ ! -w  "${initd_dir}" ]; then
+        echo "Current user does not have write permissions to ${initd_dir}. Cannot install NiFi as a service."
+        exit 1
+    fi
+
+# Create the init script, overwriting anything currently present
+cat <<SERVICEDESCRIPTOR > ${SVC_FILE}
+#!/bin/sh
+
+#
+#    Licensed to the Apache Software Foundation (ASF) under one or more
+#    contributor license agreements.  See the NOTICE file distributed with
+#    this work for additional information regarding copyright ownership.
+#    The ASF licenses this file to You under the Apache License, Version 2.0
+#    (the "License"); you may not use this file except in compliance with
+#    the License.  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+# chkconfig: 2345 20 80
+# description: Apache NiFi is a dataflow system based on the principles of Flow-Based Programming.
+#
+
+# Make use of the configured NIFI_HOME directory and pass service requests to the nifi.sh executable
+NIFI_HOME=${NIFI_HOME}
+bin_dir=\${NIFI_HOME}/bin
+nifi_executable=\${bin_dir}/nifi.sh
+
+\${nifi_executable} "\$@"
+SERVICEDESCRIPTOR
+
+    if [ ! -f "${SVC_FILE}" ]; then
+        echo "Could not create service file ${SVC_FILE}"
+        exit 1
+    fi
+
+    # Provide the user execute access on the file
+    chmod u+x ${SVC_FILE}
+
     rm -f "/etc/rc2.d/S65${SVC_NAME}"
-        ln -s "/etc/init.d/${SVC_NAME}" "/etc/rc2.d/S65${SVC_NAME}"
+    ln -s "/etc/init.d/${SVC_NAME}" "/etc/rc2.d/S65${SVC_NAME}" || { echo "Could not create link /etc/rc2.d/S65${SVC_NAME}"; exit 1; }
     rm -f "/etc/rc2.d/K65${SVC_NAME}"
-        ln -s "/etc/init.d/${SVC_NAME}" "/etc/rc2.d/K65${SVC_NAME}"
+    ln -s "/etc/init.d/${SVC_NAME}" "/etc/rc2.d/K65${SVC_NAME}" || { echo "Could not create link /etc/rc2.d/K65${SVC_NAME}"; exit 1; }
     echo "Service ${SVC_NAME} installed"
 }
 
-
 run() {
     BOOTSTRAP_CONF_DIR="${NIFI_HOME}/conf"
     BOOTSTRAP_CONF="${BOOTSTRAP_CONF_DIR}/bootstrap.conf";