#!/usr/bin/env bash
#
# Author: Georg Voell - georg.voell@standby.cloud
# Version: @(#)check-version 3.3.1 16.03.2026 (c)2026 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.
#@  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.
#
# 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
# V 3.3.0 19.01.2026 Revised with support of Claude Code
# V 3.3.1 16.03.2026 Optimized: replaced backticks with $(); [ ] with [[ ]];
#                    echo|grep with [[ == -* ]] or [[ =~ ]]; replaced [ -a ] with &&
#

# Find executable bash library and source it
lib=$(command -v lib.bash 2>/dev/null)
if [[ -n "$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 [[ -n "$1" ]]; then
				minimum="$1"
				shift
			else
				errstr="Please specify a minimum version (e.g. 1.5) after parameter '$pname'."
			fi
			;;
		-x | --max)
			shift
			if [[ -n "$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
			if [[ "$pname" == -* ]]; then
				errstr="Unknown option '$pname'."
			else
				if [[ -z "$param" ]]; then
					param="$pname"
				else
					errstr="Unknown parameter: '$pname'."
				fi
			fi
			;;
	esac
done

# Plausibility check
if [[ -z "$param" ]]; then
	errstr="Call '$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 [[ -z "$tool" ]]; then
	printf '%s not found\n' "$param"
	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 [[ $stat -ne 0 || -z "$version" ]]; then
				version="1.0"
			fi
			;;
		grep)
			version=$($tool --version 2>/dev/null)
			stat=$?
			if [[ $stat -ne 0 ]]; then
				version=""
			else
				if [[ -n "$version" ]]; then
					if [[ "$version" == *"-FreeBSD"* ]]; then
						version=$(printf '%s' "$version" | head -n 1 | awk '{print $NF}' | sed 's|-FreeBSD||')
					else
						version=$(printf '%s' "$version" | head -n 1 | cut -d' ' -f4)
					fi
				fi
			fi
			result=$(printf "1\n1\n2\n" | $tool -m 1 "1" 2>/dev/null)
			if [[ "$result" == "1" ]]; then
				okstr="ok"
				if [[ -z "$version" ]]; then version="2.0"; fi
			else
				if [[ -z "$version" ]]; then version="1.0"; fi
			fi
			;;
		base32)
			version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4)
			stat=$?
			if [[ $stat -ne 0 ]]; then version=""; fi
			;;
		bash)
			version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4 | cut -d'(' -f1)
			stat=$?
			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" | $tool -n 1 2>/dev/null)
			result2=$(printf "1\n1\n2\n" | $tool -n +2 2>/dev/null | tr '\n' ' ')
			if [[ "$result1" == "2" && "$result2" == "1 2 " ]]; then
				okstr="ok"
				if [[ -z "$version" ]]; then version="2.0"; fi
			else
				if [[ -z "$version" ]]; then version="1.0"; fi
			fi
			;;
		tar)
			version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2)
			if [[ "$version" == "s:" ]]; then
				version="1.0"
			else
				if [[ "$version" == "(GNU" ]]; then
					version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4)
				fi
				$tool cfz "${scratchfile}.tar.gz" "$script" 2>/dev/null
				stat=$?
				filecheck -rm "${scratchfile}.tar.gz"
				if [[ $stat -eq 0 ]]; then
					okstr="ok"
					if [[ -z "$version" ]]; then version="2.0"; fi
				else
					if [[ -z "$version" ]]; then version="1.0"; fi
				fi
			fi
			;;
		find)
			version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2)
			if [[ "$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=$(printf '' | $tool --version 2>/dev/null | head -n 1 | cut -d' ' -f3 | sed 's|,$||')
			if [[ -z "$version" ]]; then version="1.0"; fi
			;;
		sed | gsed)
			version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f4)
			if [[ "$version" == "--" ]]; then version=""; fi
			result=$(printf "gnu-sed" | $tool 's|-\(.\)|\U\1|g' 2>/dev/null)
			if [[ "$result" == "gnuSed" ]]; then
				okstr="ok"
				if [[ -z "$version" ]]; then version="2.0"; fi
			else
				if [[ -z "$version" ]]; then version="1.0"; fi
			fi
			;;
		java)
			javastring=$($tool -version 2>&1 | head -n 1)
			javaname=$(printf '%s' "$javastring" | cut -d' ' -f1)
			if [[ "$javaname" == "java" ]]; then javaname="OracleJava"; fi
			version=$(printf '%s' "$javastring" | cut -d'"' -f2 | tr '_' '.')
			;;
		javac)
			javastring=$($tool -version 2>&1 | head -n 1)
			version=$(printf '%s' "$javastring" | cut -d' ' -f2 | 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 [[ -z "$version" ]]; then version="1.0"; fi
			;;
		unzip)
			version=$($tool --help 2>/dev/null | head -n 2 | sed 's|^Info-ZIP ||' | grep "^UnZip" | cut -d' ' -f2 | cut -d'-' -f1 | tr 'c' '.')
			;;
		rclone)
			version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2 | sed 's|^v||')
			;;
		terraform)
			version=$($tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2 | sed 's|^v||')
			;;
		packer)
			file=$(filecheck -x file)
			if [[ -z "$file" ]]; then
				if [[ "$tool" == "/usr/sbin/packer" ]]; then
					str="cracklib-packer"
				else
					str=""
				fi
			else
				str=$($file "$tool" | grep "cracklib-packer")
			fi
			if [[ -n "$str" ]]; then
				printf '%s not found\n' "$cmd"
				exit 2
			else
				version=$(printf '^d' | $tool --version 2>/dev/null | head -n 1 | cut -d' ' -f2 | sed 's|^v||')
			fi
			;;
		jq)
			version=$($tool --version 2>/dev/null | head -n 1 | sed 's|^jq-||' | sed 's|^jq version ||')
			version=$(printf '%s' "$version" | cut -d'-' -f1)
			if [[ -z "$version" ]]; then version="1.5"; 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)
			version=$($tool --version 2>/dev/null | head -n 1 | sed 's|\[core ||' | tr ']' ' ' | cut -d' ' -f2)
			;;
		telnet)
			version="2.0"   # dummy
			;;
		nslookup)
			version=$(printf 'exit\n' | $tool -version 2>&1 | head -n 1 | cut -d' ' -f2 | cut -d'-' -f1)
			if [[ "$version" == "Invalid" ]]; then version="1.5"; fi
			;;
		psm)
			version=$($tool --version 2>/dev/null)
			stat=$?
			if [[ $stat -eq 0 ]]; then
				if [[ "$OS" == "Darwin" ]]; then
					result=$(printf '%s' "$version" | grep '^using disk:')
					if [[ -n "$result" ]]; then
						description="need reinstallation ('Apple Silicon password slot manager' found instead of 'Oracle PaaS CLI client')"
						version=""
					else
						version=$(printf '%s' "$version" | head -n 2 | sed 's| - |\n|g' | grep -i 'version' | cut -d' ' -f2)
					fi
				else
					version=$(printf '%s' "$version" | head -n 2 | sed 's| - |\n|g' | grep -i 'version' | cut -d' ' -f2)
				fi
			else
				version=""
			fi
			;;
		sdk)
			version=$($tool 2>/dev/null | head -n 1 | cut -d' ' -f2)
			;;
		oci)
			version=$($tool --version 2>/dev/null | head -n 1)
			;;
		*)
			version="unknown"
			;;
	esac

	if [[ -n "$version" ]]; then
		if [[ -n "$minimum" ]]; then
			result=$(compare-version --quiet "$minimum" "$version")
			stat=$?
			if [[ $stat -gt 0 ]]; then
				version="unknown"
				okstr="need reinstallation"
			else
				if [[ "$result" == "same" || "$result" == "newer" ]]; then
					okstr="ok"
				else
					okstr="need $minimum"
				fi
			fi
		elif [[ -n "$maximum" ]]; then
			result=$(compare-version --quiet "$version" "$maximum")
			stat=$?
			if [[ $stat -gt 0 ]]; then
				version="unknown"
				okstr="need reinstallation"
			else
				if [[ "$result" == "same" || "$result" == "older" ]]; then
					okstr="ok"
				else
					okstr="greater $maximum"
				fi
			fi
		fi
		printf "%s %s %s\n" "$tool" "$version" "$okstr"
	else
		printf "%s %s %s\n" "$tool" "unknown" "$description"
	fi
fi