My expertise in shellscript/perl can be ranged to Beginner!
Hence, a detailed help would be very much appreciated.

I’ve written a script to compare versions of the installed and installing software(Package). Could you let me know where am I missing the link..

==============

#!/bin/bash

## Assuming that the script will be placed in the Pkg/Contents/Resources folder

path=`pwd `

cd..

PKG_PATH=`pwd `

PKG_INFO_PATH=”${PKG_PATH}/Contents/Info”
INSTALLED_COMPONENT_INFO_PATH=”/Applications/appname/Contents/Info”

function CompareVersions()
{
local FIRST_VERSION=${1}
local SECOND_VERSION=${2}

#Installing component

local MAJOR_FIRST_VERSION=$(echo ${FIRST_VERSION} | cut -d ‘.’ -f 1)
local MINOR_FIRST_VERSION=$(echo ${FIRST_VERSION} | cut -d ‘.’ -f 2)
local BUILD_FIRST_VERSION=$(echo ${FIRST_VERSION} | cut -d ‘.’ -f 3)

#Installed component
local MAJOR_SECOND_VERSION=$(echo ${SECOND_VERSION} | cut -d ‘.’ -f 1)
local MINOR_SECOND_VERSION=$(echo ${SECOND_VERSION} | cut -d ‘.’ -f 2)
local BUILD_SECOND_VERSION=$(echo ${SECOND_VERSION} | cut -d ‘.’ -f 3)

if [ ${MAJOR_FIRST_VERSION} -gt ${MAJOR_SECOND_VERSION} ]; then
exit 0
elif [ ${MAJOR_FIRST_VERSION} -lt ${MAJOR_SECOND_VERSION} ]; then
exit 65
elif [ ${MINOR_FIRST_VERSION} -gt ${MINOR_SECOND_VERSION} ]; then
exit 0
elif [ ${MINOR_FIRST_VERSION} -lt ${MINOR_SECOND_VERSION} ]; then
exit 65
elif [ ${BUILD_FIRST_VERSION} -gt ${BUILD_SECOND_VERSION} ]; then
exit 0
elif [ ${BUILD_FIRST_VERSION} -lt ${BUILD_SECOND_VERSION} ]; then
exit 65
fi

exit 0
}

if [ -e "${INSTALLED_COMPONENT_INFO_PATH}.plist" ]; then
INSTALLED_COMPONENT_VERSION=$(defaults read “${INSTALLED_COMPONENT_INFO_PATH}” “CFBundleShortVersionString”)
INSTALLING_COMPONENT_VERSION=$(defaults read “${PKG_INFO_PATH}” “CFBundleShortVersionString”)
CompareVersions “${INSTALLING_COMPONENT_VERSION}” “${INSTALLED_COMPONENT_VERSION}”
else
exit 0
fi

===================

Here, I am able to get the version numbers of the Installed component and the “yet to be” installed component.
But how do I get the final Result (i.e if the Version check Fails) and get the Versioncheck.strings to display the error message(in case of Error) in the Installer window?

Thanks in advance,

Ruby

i need a help with packagemaker app.

I need my Installer to verify if there is actually a newer version of the software installed on the system. If YES, warn the user and abort the install process. If No, upgrade the existing version.

Do you have a script that can do this for me?

Thanks,
ruby