From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Pascal J. Bourguignon" Newsgroups: gmane.emacs.help Subject: Re: GURU NEEDED : break a command into several lines and comment each line Date: Fri, 14 Jan 2011 18:41:30 +0100 Organization: Informatimago Message-ID: <877he78jsl.fsf@kuiper.lan.informatimago.com> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1295030495 30342 80.91.229.12 (14 Jan 2011 18:41:35 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 14 Jan 2011 18:41:35 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Jan 14 19:41:31 2011 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PdoaR-000426-2l for geh-help-gnu-emacs@m.gmane.org; Fri, 14 Jan 2011 19:41:24 +0100 Original-Received: from localhost ([127.0.0.1]:51822 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PdoaO-0002Pj-Sm for geh-help-gnu-emacs@m.gmane.org; Fri, 14 Jan 2011 13:41:20 -0500 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: comp.unix.shell,gnu.emacs.help Original-Lines: 43 Original-X-Trace: individual.net bxaPPv9vchtWC+9kDDefXA/wfMHarOGCkBwjrrx2UJXjirPhdc Cancel-Lock: sha1:ZmI5ZjFkYzFiOWZjZTQwMGEzNzM5Y2U4MjY4ZjA3MGViOTQ0NmE3YQ== sha1:51WBXMxCUaiZAUXV4m0KaGLoXfg= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no Importance: high User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) Original-Xref: usenet.stanford.edu comp.unix.shell:249320 gnu.emacs.help:184279 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:78450 Archived-At: bolega writes: > On Jan 13, 7:12 pm, Stefan Monnier wrote: >> > #!/bin/bash -xv >> > command       \ # comment1 >> >          -sw1 \ # comment2 >> >          -sw2 \ # comment3 >> >          arguments >> > One ought to be able to comment every single switch if desired for >> > whatever reason. >> >> Thanks for the riddle.  Here's a solution: >> >>   command        $(: # comment1 >>   )        -sw1  $(: # comment2 >>   )        -sw2  $(: # comment3 >>   )        arguments >> >> -- Stefan > > thanks to all four of you who replied and solved this problem to a > large extent, building on each other's ideas. > > I would have done it by the first method of concatenating or pipes > into a sed which replaced end by the next and # can be placed after > pipes. the string then fed into a bash. > > Stefan, whats the purpose of the colon ? it works without colon also. > Is it subshell or some environment import ? like the colon which can > substitute the #!/bin/bash on the top ? The colon is a built-in command equivalent to true. The syntax specified for $( ... ) (in man bash) is: $(command) so a command is expected. The shortest command doing nothing is :. -- __Pascal Bourguignon__ http://www.informatimago.com/ A bad day in () is better than a good day in {}.