From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-20972-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 17616 invoked by alias); 20 Nov 2015 05:17:07 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
X-Seq: 20972
Received: (qmail 15851 invoked from network); 20 Nov 2015 05:17:07 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM,
	T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no
	version=3.4.0
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=date:from:to:cc:subject:message-id:references:mime-version
         :content-type:content-disposition:in-reply-to:user-agent;
        bh=uggCyAkpkKFtk1vxJNRzAbZZqZrvQcCRyXY6Smm0SBM=;
        b=GZbqnkKjbqp5RJJ64ec52Og5a27zs3LNBPI7HHqJp0aSF/eOdOQBN64yXBcQWuTDeV
         udJIs8nT+ROIjADGrp4VWDmvD4cGpceo5VXUHkKJVR3gk7+hLRuyAv6gLqg35YhMY6fK
         mC1lBMxc7otT7PTXClG+eSKFcEFDGTKWh2D+OgidlFoboLcuxFPLQxIyv4pZTHm2pn1S
         OmrNOXPsuIRmBv2UgQHRDEGr5NdJG6mxxfp/0Kqu3JDphwcYqqCoWyHWc0r8B8QSsQOX
         VLp1aPW3ySWPopnILlJ4qacxfGoGTsjA9gIt3WKiiXeGDetakS/cfmDQyN5WNl00Ayhj
         j6sQ==
X-Received: by 10.182.153.226 with SMTP id vj2mr7378901obb.61.1447996623267;
        Thu, 19 Nov 2015 21:17:03 -0800 (PST)
Date: Thu, 19 Nov 2015 23:17:01 -0600
From: Matthew Martin <phy1729@gmail.com>
To: TJ Luoma <luomat@gmail.com>
Cc: zsh-users@zsh.org
Subject: Re: Version String Comparison
Message-ID: <20151120051701.GA18570@CptOrmolo.darkstar>
References: <9A09EF7C-A81B-4ED9-A266-C6A53BC98167@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <9A09EF7C-A81B-4ED9-A266-C6A53BC98167@gmail.com>
User-Agent: Mutt/1.5.24 (2015-08-30)

On Thu, Nov 19, 2015 at 05:16:08PM -0500, TJ Luoma wrote:
> 
> I am looking for a zsh way to compare version numbers, which is smart enough
> to know that, for example
> 
> "6.7.0.36" is less than "6.7.0.0044"

vercomp() {
	[ "$1" = "$2" ] && return
	[ "${1%%.*}" -gt "${2%%.*}" ] && return 1
	[ "${1%%.*}" -lt "${2%%.*}" ] && return 2
	vercomp "${1#*.}" "${2#*.}"
}

% vercomp 3 4; echo $?              
2

% vercomp 1 1; echo $?
0

% vercomp 6.7.0.36 6.7.0.0044; echo $?
2

Salt to taste for return values and beta handling (and note no error
handling is done).