From 3914141c45c574fb8d22a72af99165cb535f5f17 Mon Sep 17 00:00:00 2001
From: Andre F de Miranda <trixpan@users.noreply.github.com>
Date: Fri, 14 Oct 2016 14:36:48 +1100
Subject: [PATCH] NIFI-1710 - Resolve path name to nifi.sh script

This closes #1137.

Signed-off-by: Andy LoPresto <alopresto@apache.org>
---
 .../src/main/resources/bin/nifi.sh            | 28 +++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-resources/src/main/resources/bin/nifi.sh b/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-resources/src/main/resources/bin/nifi.sh
index 79850eecc2..ff8addd718 100755
--- a/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-resources/src/main/resources/bin/nifi.sh
+++ b/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-resources/src/main/resources/bin/nifi.sh
@@ -17,12 +17,36 @@
 
 # Script structure inspired from Apache Karaf and other Apache projects with similar startup approaches
 
-SCRIPT_DIR=$(dirname "$0")
-SCRIPT_NAME=$(basename "$0")
+# Discover the path of the file
+
+
+# Since MacOS X, FreeBSD and some other systems lack gnu readlink, we use a more portable
+# approach based on following StackOverflow comment http://stackoverflow.com/a/1116890/888876
+
+TARGET_FILE=$0
+
+cd $(dirname $TARGET_FILE)
+TARGET_FILE=$(basename $TARGET_FILE)
+
+# Iterate down a (possible) chain of symlinks
+while [ -L "$TARGET_FILE" ]
+do
+    TARGET_FILE=$(readlink $TARGET_FILE)
+    cd $(dirname $TARGET_FILE)
+    TARGET_FILE=$(basename $TARGET_FILE)
+done
+
+# Compute the canonicalized name by finding the physical path
+# for the directory we're in and appending the target file.
+PHYS_DIR=`pwd -P`
+
+SCRIPT_DIR=$PHYS_DIR
 PROGNAME=$(basename "$0")
 
 . "$SCRIPT_DIR"/nifi-env.sh
 
+
+
 warn() {
     echo "${PROGNAME}: $*"
 }