#!/bin/bash
#
# Author: Georg Voell - georg.voell@standby.cloud
# Version: @(#)check-version 3.2.0 07.09.2024 (c)2024 Standby.cloud
# Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl/
#
# This script can be used free of charge. Use it as is or customize as needed. It is not guaranteed to be
# error free and you will not be reimbursed for any damage it may cause.
#
#@  Get the version of a script and tries to get the version for some tools.
#@  Result is toolname with path, version, compare string (each tab separated).
#@  If tool is not installed, it returns "tool not found".
#@
#@Usage: check-version [options] tool
#@  Options:
#@    -h, --help        : Displays helptext.
#@    -v, --version     : Displays the version of the script.
#@    -m, --min <string>: Minimum version that the tool has to have at least.
#@    -x, --max <string>: Maximum version that the tool can have.
#@  Tool: List of tools is limited e.g.:
#@    jq    : Displays the version of installed jq.
#@    java  : Displays the version of installed java.
#@    python: Displays the version of installed python.
#@
#@Examples:
#@  check-version java
#@    Displays version of installed java e.g. "/usr/bin/java	1.8.0.212	found".
#@  check-version jq --min 1.5
#@    Displays version of installed jq and if it is >= 1.5 e.g. "/usr/local/bin/jq 1.6 ok".
#
# Exit codes:
#  01: Unknown or wrong parameter.
#
# See also:
#  **check-tools**(1), **compare-version**(1), **install-scripts**(1)
#
# ToDo:
#  Increase the list of tools - improve checks for find, awk
#
# Update history:
#
# V 3.0.0 24.04.2020 New version
# V 3.0.1 11.06.2020 Using library
# V 3.0.2 02.07.2020 Tab separated output
# V 3.0.3 23.09.2020 Packer included
# V 3.0.4 24.10.2020 Check for gnu sed
# V 3.0.5 31.01.2021 Check for ansible
# V 3.0.6 03.09.2022 Output with blanks instead of tabs
# V 3.1.0 05.06.2023 New copyright
# V 3.1.1 24.08.2023 Fix getting version from older nslookup
# V 3.1.2 07.09.2023 Fix for gsed and gtail
# V 3.2.0 07.09.2024 New minor version
#

# Find executable bash library and source it
lib=`which lib.bash 2>/dev/null | sed 's|^no 'lib.bash' in .*||'`
if [ "$lib" != "" ]; then
	source "$lib"
else
	progdir=`dirname "$0"`
	if [ -r "${progdir}/lib.bash" ]; then
		source "${progdir}/lib.bash"
	else
		echo "Unexpected error: Unable to locate bash library 'lib.bash'."
		exit 1
	fi
fi

# Preset
param=""
minimum=""
maximum=""

# Check parameters: Loop until all parameters are used up
while [ $# -gt 0 ]; do
	pname=${1}
	case "$1" in
		-m | --min)
			shift
			if [ "$1" != "" ]; then
				minimum="$1"
				shift
			else
				errstr="Please specify a minimum version (e.g. 1.5) after parameter '$pname'."
			fi
			;;
		-x | --max)
			shift
			if [ "$1" != "" ]; then
				maximum="$1"
				shift
			else
				errstr="Please specify a maximum version (e.g. 2.1) after parameter '$pname'."
			fi
			;;
		-v | --version)
			shift
			showversion=true
			;;
		-h | --help)
			shift
			showhelp=true
			;;
		*)
			shift
			paramck=`echo "$pname" | grep '^-'` # Types don't begin with '-'
			if [ "$paramck" != "" ]; then
				errstr="Unknown option '$pname'."
			else
				if [ "$param" = "" -a "$paramck" = "" ]; then
					param="$pname"
				else
					errstr="Unknown parameter: '$pname'."
				fi
			fi
	esac
done

# Plausibility check
if [ "$param" = "" ]; then
	errstr="Call '$progstr' with a filename e.g. a script or a tool."
fi

# Display help or error message
DisplayHelp

# Set some defaults
okstr="found"
tool=`filecheck -x "$param"`

if [ "$tool" = "" ]; then
	echo "$param not found"
	exit 2
else
	description="need reinstallation"
	cmd=`basename "$param"`
	case "$cmd" in
		file)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d'-' -f2`
			stat=$?
			
			if [ $stat -ne 0 -o "$version" = "" ]; then
				version="1.0"
			fi
			;;
		grep)
			version=`$tool --version 2>/dev/null`
			stat=$?
			
			if [ $stat -ne 0 ]; then
				version=""
			else
				if [ "$version" != "" ]; then
					result=`echo "$version" | grep '\-FreeBSD'`
					if [ "$result" != "" ]; then
						version=`echo "$version" | head -n 1 | awk '{print $NF}' | sed 's|-FreeBSD||'`
					else
						version=`echo "$version" | head -n 1 | cut -d' ' -f4`
					fi
				fi
			fi
			
			result=`printf "1\n1\n2\n" | $tool -m 1 "1" 2>/dev/null`
			if [ "$result" = "1" ]; then
				okstr="ok"
				if [ "$version" = "" ]; then
					version="2.0"
				fi
			else
				if [ "$version" = "" ]; then
					version="1.0"
				fi
			fi
			;;
		base32)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4`
			stat=$?

			if [ $stat -ne 0 ]; then
				version=""
			fi
			;;
		tail | gtail)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4 | cut -d'-' -f1`
			stat=$?
			
			if [ $stat -ne 0 ]; then
				version=""
			fi
			
			result1=`printf "1\n1\n2\n" | $tool -n 1 2>/dev/null`					# Tail Last Line
			result2=`printf "1\n1\n2\n" | $tool -n +2 2>/dev/null | tr '\n' ' '`	# Tail From Line 2
			if [ "$result1" = "2" -a "$result2" = "1 2 " ]; then
				okstr="ok"
				if [ "$version" = "" ]; then
					version="2.0"
				fi
			else
				if [ "$version" = "" ]; then
					version="1.0"
				fi
			fi
			;;
		tar)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2`
			if [ "$version" = "s:" ]; then
				version="1.0"
			else
				if [ "$version" = "(GNU" ]; then
					version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4`
				fi
				result=`$tool cfz ${scratchfile}.tar.gz $script 2>/dev/null`			# Packen in file.tar.gz (auspacken mit tar xzf)
				stat=$?
				filecheck -rm ${scratchfile}.tar.gz
				
				if [ $stat -eq 0 ]; then
					okstr="ok"
					if [ "$version" = "" ]; then
						version="2.0"
					fi
				else
					if [ "$version" = "" ]; then
						version="1.0"
					fi
				fi
			fi
			;;
		find)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2`
			
			if [ "$version" = "(GNU" ]; then
				version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4`
			else
				touch $scratchfile
				resstr=`find "$scratchfile" -type f -mmin -15 2> /dev/null`
				filecheck -rm $scratchfile
				if [ "$resstr" = "$scratchfile" ]; then
					okstr="ok"
					version="2.0"
				else
					version="1.0"
				fi
			fi
			;;
		awk)
			version=`echo "" | $tool --version 2>/dev/null | head -n 1 | cut -d' ' -f3 | sed 's|,$||'`
			if [ "$version" = "" ]; then
				version="1.0"
			fi
			;;
		sed | gsed)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4`
			if [ "$version" = "--" ]; then
				version=""
			fi
			result=`printf "gnu-sed" | $tool 's|-\(.\)|\U\1|g' 2>/dev/null`
			if [ "$result" = "gnuSed" ]; then
				okstr="ok"
				if [ "$version" = "" ]; then
					version="2.0"
				fi
			else
				if [ "$version" = "" ]; then
					version="1.0"
				fi
			fi
			;;
		java)
			javastring=`$tool -version 2>&1 | head -n 1`
			javaname=`echo $javastring | cut -d ' ' -f 1`
			if [ "$javaname" = "java" ]; then
				javaname="OracleJava"
			fi
			version=`echo $javastring | cut -d '"' -f 2 | tr '_' '.'`
			;;
		javac)
			javastring=`$tool -version 2>&1 | head -n 1`
			version=`echo $javastring | cut -d ' ' -f 2 | tr '_' '.'`
			;;
		python* | pip* | easy_install* | curl)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2 | cut -d'-' -f1`
			;;
		zip)
			version=`$tool --help 2>/dev/null | head -n 2 | grep "^Zip" | cut -d' ' -f2`
			if [ "$version" = "" ]; then
				version="1.0"
			fi
			;;
		unzip)
			version=`$tool --help 2>/dev/null | head -n 2 | sed 's|^Info-ZIP ||' | grep "^UnZip" | cut -d' ' -f2 | cut -d'-' -f1 | tr 'c' '.'`
			;;
		rclone)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2 | sed 's|^v||'`
			;;
		terraform)
			# Example1:
			#   Terraform v0.15.4
			#   on linux_amd64
			# Example2:
			#   Terraform v0.13.5
			#
			#   Your version of Terraform is out of date! The latest version
			#   is 0.15.4. You can update by downloading from https://www.terraform.io/downloads.html
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2 | sed 's|^v||'`
			;;
		packer)
			file=`filecheck -x file`	# Check if we can use tool "file"
			if [ "$file" = "" ]; then
				if [ "$tool" = "/usr/sbin/packer" ]; then
					# Assuming that this is cracklib-packer and not packer.io
					str="cracklib-packer"
				else
					str=""
				fi
			else
				str=`$file "$tool" | grep "cracklib-packer"`
			fi
			
			if [ "$str" != "" ]; then
				# No packer - only cracklib-packer
				echo "$cmd not found"
				exit 2
			else
				# version=`$tool version 2>&1 | head -n 1 | cut -d' ' -f2 | sed 's|^v||'`
				version=`echo '^d' | $tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2 | sed 's|^v||'`
			fi
			;;
		jq)
			version=`$tool --version 2>/dev/null | head -n 1 | sed 's|^jq-||' | sed 's|^jq version ||'`
#			if [ "$version" = "-" ]; then
#				# There is a bug in jq 1.6 rc1 - version is not set. Try to get it from man
#				version=`man $tool --version 2>&1 | grep "jq-" | cut -d'-' -f2`
#				if [ "$version" = "" ]; then
#					# This is just a guess
#					version="1.6"
#				fi
#			fi
			
			# e.g. jq-1.5-1-a5b5cbe (Ubuntu 16) or jq-1.6rc1 (Solaris 11.4)
			# version=`echo ${version:0:3}`
			version=`echo $version | cut -d'-' -f1`
			if [ "$version" = "" ]; then
				version="1.5"	# This is just a guess
			fi
			;;
		wget | git | opc | puttygen)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f3`
			;;
		tcsh)
			version=`$tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2`
			;;
		ansible)
			# ansible 2.10.6
			# ansible [core 2.11.0]
			version=`$tool --version 2>/dev/null | head -n 1 | sed 's|\[core ||' | tr ']' ' ' | cut -d' ' -f2`
			;;
		telnet)		# rpm -qa | grep telnet or Debian: dpkg -l | grep telnet or Darwin: pkgutil --packages
			version="2.0"	# This is just a dummy here
			;;
		nslookup)
			version=`echo "exit" | $tool -version 2>&1 | head -n 1 | cut -d' ' -f2 | cut -d'-' -f1`
			if [ "$version" = "Invalid" ]; then
				version="1.5"	# This is just a guess
			fi
			;;
		psm)
			version=`$tool --version 2>/dev/null`
			stat=$?
			
			if [ $stat -eq 0 ]; then
				if [ "$OS" = "Darwin" ]; then
					result=`echo "$version" | grep '^using disk:'`
					if [ "$result" != "" ]; then
						description="need reinstallation ('Apple Silicon password slot manager' found instead of 'Oracle PaaS CLI client')"
						version=""
					else
						version=`echo "$version" | head -n 2 | sed 's| - |\n|g' | grep -i 'version' | cut -d' ' -f2`
					fi
				else
					version=`echo "$version" | head -n 2 | sed 's| - |\n|g' | grep -i 'version' | cut -d' ' -f2`
				fi
			else
				version=""
			fi
			;;
		sdk)
			version=`$tool 2>/dev/null | head -n 1 | cut -d' ' -f2`
			;;
		oci)
			version=`$tool --version 2>/dev/null | head -n 1`
			;;
		*)
			version="unknown"
	esac
	
	if [ "$version" != "" ]; then
		if [ "$minimum" != "" ]; then
			result=`compare-version --quiet "$minimum" "$version"`
			stat=$?

			if [ $stat -gt 0 ]; then
				version="unknown"
				okstr="need reinstallation"
			else
				if [ "$result" = "same" -o "$result" = "newer" ]; then
					okstr="ok"
				else
					okstr="need $minimum"
				fi
			fi
		else
			if [ "$maximum" != "" ]; then
				result=`compare-version --quiet "$version" "$maximum"`
				stat=$?

				if [ $stat -gt 0 ]; then
					version="unknown"
					okstr="need reinstallation"
				else
					if [ "$result" = "same" -o "$result" = "older" ]; then
						okstr="ok"
					else
						okstr="greater $maximum"
					fi
				fi
			fi
		fi
		
		printf "%s %s %s\n" "$tool" "$version" "$okstr"
	else
		printf "%s %s %s\n" "$tool" "unknown" "$description"
	fi
fi