From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-1.6 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, FSL_HELO_FAKE,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE, SPF_NONE shortcircuit=no autolearn=no autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 2FFEF1F463 for ; Mon, 23 Dec 2019 21:41:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726846AbfLWVl3 (ORCPT ); Mon, 23 Dec 2019 16:41:29 -0500 Received: from mail-pf1-f193.google.com ([209.85.210.193]:44135 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726817AbfLWVl3 (ORCPT ); Mon, 23 Dec 2019 16:41:29 -0500 Received: by mail-pf1-f193.google.com with SMTP id 195so8897705pfw.11 for ; Mon, 23 Dec 2019 13:41:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=OysBAeE2XhO+fAmu3UoO7uDDuhfeORzgHDXy1nUN2sg=; b=fbfBisbpTasSqLjwDfXHiVnAMbkWTv6K2xBc0G3vHf4C3UeYo+2XOUU2LdrjNlRUxs 8hoImHdydrB9h+GhXB3BQd8vKM4H3Q/BmPfETcriQ0PMFDNKTFc/E/a9sf+2obf1Plzk PIFFEOGaeD3BWz4sNUXGANYWYNkwj716FPFVoIWdtJdFeyBGHShXecf0hLUmANvX+2fU ykdAxChHatTYgvf7XDVm0iXPUedU2QCt0bsrRydK9Ghy53PLXfwOrIi4dtT8iGTXfmzY momS6H07zxX2oSfCxgbFRqJDwXaYazMahlA4OgdTiXnDdfKT5qh/bdwsXHRH15RcKYNa UMiA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=OysBAeE2XhO+fAmu3UoO7uDDuhfeORzgHDXy1nUN2sg=; b=VXIIfE99oWwSf30yRKINAADMj5h3Na+uFMeVS9gxxnOzZpIePO1xoDJFwk1SLFW2lc XB8eMI9ncnX+NuZhECaknr9DNac6SThp0JOiUkSeblTMHa8ah7L08ugLv29hia62SZcl DyRJnEmzrd0uWQhcbGSUki2fr8gCfRCeqACvsIeHYPbYKQwRdLxBZxNr9NsoXHgzqgBQ xezxZdq+odLuyCk+elQ5J12B6X6grHQbyIOtq44WS//sOIkelrcGf+Xrfe8eD27chGBY I4H9pfCY4k6REN8z3X4ftH/X89+95JBhRPFBZl1pVvppVlcrEgwjfpo6QiIGfgHSusRV JZoQ== X-Gm-Message-State: APjAAAVJTH5C993xOMPgGAM4xbumlEQdsEyXjbnOyOibtfso55oP0RaP Gs6xaap2RvtRNN+ISkd0tWc= X-Google-Smtp-Source: APXvYqyoa7PMJiMjy6gprOqM8N1LpgsPd6bW0c+XbD8RJvKNWGIl51fwwnaRV5oOuTr+mtz8wRfnoQ== X-Received: by 2002:a63:9548:: with SMTP id t8mr32410299pgn.205.1577137288095; Mon, 23 Dec 2019 13:41:28 -0800 (PST) Received: from google.com ([2620:15c:2ce:200:cf67:1de0:170f:be65]) by smtp.gmail.com with ESMTPSA id p17sm24974600pfn.31.2019.12.23.13.41.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Dec 2019 13:41:27 -0800 (PST) Date: Mon, 23 Dec 2019 13:41:25 -0800 From: Jonathan Nieder To: Arnaud Bertrand Cc: "brian m. carlson" , git@vger.kernel.org Subject: Re: Possible improvement in DB structure Message-ID: <20191223214125.GA38316@google.com> References: <20191223190950.GA6240@camp.crustytoothpaste.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Hi Arnaud, Arnaud Bertrand wrote: > Today, I think that tags are not located in objects directory but in > refs/tags which is a good idea.;-) Not precisely. See "git help repository-layout" for more details, or https://www.kernel.org/pub/software/scm/git/docs/user-manual.html#hacking-git or the "git internals" chapter of https://git-scm.com/book/. > The origin of my reflection was that I wanted to find an old file. > > I knew that in the past of my project, we had started to write a > driver for a device and it was abandoned. I wanted to find this file. > I knew a "key line" to search for and I knew the file was a .c file > but I didn't know the exact name. Thanks for this context! It's very helpful. > So, the goal was to parse all the database, find all the different .c > files and grep it to find the the driver. Git intends to make this kind of history mining not too difficult. You can run a command like git log --all -S'the key line' -- '*.c' and it should do the right thing. Or you can do something more complex using something like "git rev-list --all | git diff-tree --stdin --name-only --diff-filter=D" (to show deleted files). Is the problem that that command is too slow? Hope that helps, Jonathan