From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.user Subject: Re: pipelines Date: Wed, 01 Apr 2009 00:56:10 +0200 Message-ID: <87eiwd5mk5.fsf@gnu.org> References: <49CE1DCA.8070604@gentoo.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1238540225 17954 80.91.229.12 (31 Mar 2009 22:57:05 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 31 Mar 2009 22:57:05 +0000 (UTC) To: guile-user@gnu.org Original-X-From: guile-user-bounces+guile-user=m.gmane.org@gnu.org Wed Apr 01 00:58:23 2009 Return-path: Envelope-to: guile-user@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1LomuA-0000jx-RR for guile-user@m.gmane.org; Wed, 01 Apr 2009 00:58:03 +0200 Original-Received: from localhost ([127.0.0.1]:59490 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Lomsn-0007h0-2b for guile-user@m.gmane.org; Tue, 31 Mar 2009 18:56:37 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Lomsg-0007e9-Ol for guile-user@gnu.org; Tue, 31 Mar 2009 18:56:30 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Lomsa-0007PL-6J for guile-user@gnu.org; Tue, 31 Mar 2009 18:56:28 -0400 Original-Received: from [199.232.76.173] (port=39269 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LomsZ-0007P1-PZ for guile-user@gnu.org; Tue, 31 Mar 2009 18:56:23 -0400 Original-Received: from main.gmane.org ([80.91.229.2]:37088 helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LomsZ-0002KN-CA for guile-user@gnu.org; Tue, 31 Mar 2009 18:56:23 -0400 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1LomsX-0000kx-9C for guile-user@gnu.org; Tue, 31 Mar 2009 22:56:21 +0000 Original-Received: from reverse-83.fdn.fr ([80.67.176.83]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 31 Mar 2009 22:56:21 +0000 Original-Received: from ludo by reverse-83.fdn.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 31 Mar 2009 22:56:21 +0000 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 29 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: reverse-83.fdn.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 12 Germinal an 217 de la =?iso-8859-1?Q?R=E9volution?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 821D 815D 902A 7EAB 5CEE D120 7FBA 3D4F EB1F 5364 X-OS: i686-pc-linux-gnu User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.90 (gnu/linux) Cancel-Lock: sha1:APVwmRZAnhMz72BLdCUZsxstPnY= X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-user-bounces+guile-user=m.gmane.org@gnu.org Errors-To: guile-user-bounces+guile-user=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.user:7190 Archived-At: Hello! "Marijn Schouten (hkBst)" writes: > how would I construct a pipeline with guile? Here's an idea: (use-modules (ice-9 popen) (srfi srfi-1)) (define (input-pipeline . args) (fold (lambda (program input) (with-input-from-port input (lambda () (open-input-pipe program)))) (current-input-port) args)) It can then be used like this: (read-line (input-pipeline "echo foo" "cat" "cat" "grep foo" "sed -es/foo/bar/g")) => "bar" Defining `output-pipeline' is left as an exercise to the reader. Thanks, Ludo'.