From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12134 invoked by alias); 14 Feb 2018 16:39:51 -0000 Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Users List List-Post: List-Help: List-Unsubscribe: X-Seq: 23128 Received: (qmail 24343 invoked by uid 1010); 14 Feb 2018 16:39:50 -0000 X-Qmail-Scanner-Diagnostics: from mta01.eastlink.ca by f.primenet.com.au (envelope-from , uid 7791) with qmail-scanner-2.11 (clamdscan: 0.99.2/21882. spamassassin: 3.4.1. Clear:RC:0(24.224.136.30):SA:0(-2.6/5.0):. Processed in 2.644032 secs); 14 Feb 2018 16:39:50 -0000 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on f.primenet.com.au X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_PASS,T_RP_MATCHES_RCVD autolearn=ham autolearn_force=no version=3.4.1 X-Envelope-From: rayandrews@eastlink.ca X-Qmail-Scanner-Mime-Attachments: | X-Qmail-Scanner-Zip-Files: | MIME-version: 1.0 Content-transfer-encoding: 8BIT Content-type: text/plain; charset=utf-8; format=flowed X-Authority-Analysis: v=2.3 cv=dfKuI0fe c=1 sm=1 tr=0 a=RnRVsdTsRxS/hkU0yKjOWA==:117 a=RnRVsdTsRxS/hkU0yKjOWA==:17 a=IkcTkHD0fZMA:10 a=TaxoVlAo6U-min2hh38A:9 a=QEXdDO2ut3YA:10 X-EL-IP-NOAUTH: 24.207.101.9 To: Zsh Users From: Ray Andrews Subject: alias hygiene Message-id: <1679a1e0-f716-e501-c4c2-f7e485f9701f@eastlink.ca> Date: Wed, 14 Feb 2018 08:09:42 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 Content-language: en-CA     [ some test ] && alias _grep="egrep --color=always  "$string""                             || alias _grep="egrep --color=always "^|$1|$string"" ... the alias will end up downstream from a pipe which is why there's no filespec. Is that sort of thing sanitary?  It seems to work and it's simpler than making a function call but it makes me feel queasy. I'd like to use one line after cobbling together the argument string based on the test, but "^|$1|$string"   is only understandable to egrep so we can't pre-digest it.  It seems I need the two lines.   I'm leery of some gotcha, but it seems ok so far.