From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.1 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,T_RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id B38D21F404 for ; Fri, 19 Jan 2018 17:51:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932393AbeASRv4 (ORCPT ); Fri, 19 Jan 2018 12:51:56 -0500 Received: from cpanel2.indieserve.net ([199.212.143.6]:47140 "EHLO cpanel2.indieserve.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932305AbeASRvy (ORCPT ); Fri, 19 Jan 2018 12:51:54 -0500 Received: from cpec03f0ed08c7f-cm68b6fcf980b0.cpe.net.cable.rogers.com ([174.118.92.171]:38834 helo=localhost.localdomain) by cpanel2.indieserve.net with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1ecapV-0004QX-WC for git@vger.kernel.org; Fri, 19 Jan 2018 12:51:54 -0500 Date: Fri, 19 Jan 2018 12:51:52 -0500 (EST) From: "Robert P. J. Day" X-X-Sender: rpjday@localhost.localdomain To: Git Mailing list Subject: should any build system legitimately change any tracked files? Message-ID: User-Agent: Alpine 2.21 (LFD 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel2.indieserve.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - crashcourse.ca X-Get-Message-Sender-Via: cpanel2.indieserve.net: authenticated_id: rpjday+crashcourse.ca/only user confirmed/virtual account not confirmed X-Authenticated-Sender: cpanel2.indieserve.net: rpjday@crashcourse.ca X-Source: X-Source-Args: X-Source-Dir: Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org just finished teaching a couple git courses and, after class, a student came up and described a rather weird problem -- in short: 1) before build, "git diff" shows nothing 2) do the standard build 3) suddenly, "git diff" shows some changes that's all the info i was given, but it *seems* clear that the build process itself was making changes to one or more tracked files. technically, i guess one can design a build system to do pretty much anything, but is it fair to say that this is a really poor design decision? admittedly, this isn't specifically a git question, but i'm open to opinions on something that strikes me as a bad idea. rday