From patchwork Sat Sep 18 23:15:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elijah Newren X-Patchwork-Id: 12504037 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 98B52C433FE for ; Sat, 18 Sep 2021 23:15:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6DEFE610A6 for ; Sat, 18 Sep 2021 23:15:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240673AbhIRXQx (ORCPT ); Sat, 18 Sep 2021 19:16:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239641AbhIRXQv (ORCPT ); Sat, 18 Sep 2021 19:16:51 -0400 Received: from mail-wr1-x433.google.com (mail-wr1-x433.google.com [IPv6:2a00:1450:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5816FC061757 for ; Sat, 18 Sep 2021 16:15:27 -0700 (PDT) Received: by mail-wr1-x433.google.com with SMTP id t8so21528462wrq.4 for ; Sat, 18 Sep 2021 16:15:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=KkNxmtteEZDd/DPFVopftVZzyLOL6If+eKZ7WucQR0I=; b=dDtW0uqOZRTdLQbACPn80d+6QQPmPWLUTVu04iwbsc/20lfiFgyKTsQIUnIMTJ9eVW Hiu8W7PrXUarx7ZqqgNyjEymImamumaLYvy7qi4wdDF0Z+a36con11K2v7eaUztIjXxX K50RQH9UtSU7VWp7FnctNrZoYXOIGa3DasQX8zvVbKrMkBsAEDXONJDw3YcBREwZYmp+ jjsSWRs2aTxqN0Nydoide89YirXh7vuDBeIMCUhqKas/lxBsZSLQvkV4ri76rxR1BOG7 GdYVexOvTI/p6xG5mqo4+aFETsh3IG03TGWmkFrF6P9skHJUEkveIBTrlW2B4q4wL2DK w0kA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=KkNxmtteEZDd/DPFVopftVZzyLOL6If+eKZ7WucQR0I=; b=ioz8wTi9TOy1/iyz6dzMWurfQse0W2hkgL6zZLgfPCtnTWa19AsCgakBPCl68+rHbj hacpNeBfDkUgVsSfKSypM3A8a3ck9ppDYlhC8YI5Sm5R8WSq/EbVvHQ6ndFXN/n8poTU NAUkLm+LU6hdRFoqCSd/ejxHMyLFz03TyinInYcaemktyFo5dUnzMqrytOv6Caa+7Rrs b0gSZ75CXuk8JVpJKtSAGgtf/Mw0X9B6cX17n2JQa+Jco5dwY74QKgr8ZbF7JLaVXJGr 1NhUvjeIr0lU2WlIWVk8Y1Gn8nDCYMT1Idqqtdw7hFHUAVPGE+lW3VRnFBHAlDykGC30 abmw== X-Gm-Message-State: AOAM532TsMsmaOp+FYQDohQhI/8Xzk2bQvKNU8Gx/tr5PdF3bgxLB/xG iI+J93XOxZus9c4H9MAwCLQsI04YG9s= X-Google-Smtp-Source: ABdhPJwWICy0xHW/OxmX4kH873v1WawMaP/6LjJhu93sQpIdPExbo44o3L789PF8FwoTBrMOcNrheQ== X-Received: by 2002:a5d:4c4c:: with SMTP id n12mr19700583wrt.19.1632006925853; Sat, 18 Sep 2021 16:15:25 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id n17sm11044847wrp.17.2021.09.18.16.15.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Sep 2021 16:15:25 -0700 (PDT) Message-Id: In-Reply-To: References: Date: Sat, 18 Sep 2021 23:15:18 +0000 Subject: [PATCH 1/6] t2500: add various tests for nuking untracked files Fcc: Sent MIME-Version: 1.0 To: git@vger.kernel.org Cc: =?utf-8?b?w4Z2YXIgQXJuZmrDtnLDsA==?= Bjarmason , Fedor Biryukov , Elijah Newren , Elijah Newren Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Elijah Newren From: Elijah Newren Noting that unpack_trees treats reset=1 & update=1 as license to nuke untracked files, I looked for code paths that use this combination and tried to generate testcases which demonstrated unintentional loss of untracked files and directories. I found several. I also include testcases for `git reset --{hard,merge,keep}`. A hard reset is perhaps the most direct test of unpack_tree's reset=1 behavior, but we cannot make `git reset --hard` preserve untracked files without some migration work. Also, the two commands `checkout --force` (because of the --force) and `read-tree --reset` (because it's plumbing and we need to keep it backward compatible) were left out as we expect those to continue removing untracked files and directories. Signed-off-by: Elijah Newren --- t/t2500-untracked-overwriting.sh | 244 +++++++++++++++++++++++++++++++ 1 file changed, 244 insertions(+) create mode 100755 t/t2500-untracked-overwriting.sh diff --git a/t/t2500-untracked-overwriting.sh b/t/t2500-untracked-overwriting.sh new file mode 100755 index 00000000000..a1a6dfa671e --- /dev/null +++ b/t/t2500-untracked-overwriting.sh @@ -0,0 +1,244 @@ +#!/bin/sh + +test_description='Test handling of overwriting untracked files' + +. ./test-lib.sh + +test_setup_reset () { + test_create_repo reset_$1 && + ( + cd reset_$1 && + test_commit init && + + git branch stable && + git branch work && + + git checkout work && + test_commit foo && + + git checkout stable + ) +} + +test_expect_success 'reset --hard will nuke untracked files/dirs' ' + test_setup_reset hard && + ( + cd reset_hard && + git ls-tree -r stable && + git log --all --name-status --oneline && + git ls-tree -r work && + + mkdir foo.t && + echo precious >foo.t/file && + echo foo >expect && + + git reset --hard work && + + # check that untracked directory foo.t/ was nuked + test_path_is_file foo.t && + test_cmp expect foo.t + ) +' + +test_expect_success 'reset --merge will preserve untracked files/dirs' ' + test_setup_reset merge && + ( + cd reset_merge && + + mkdir foo.t && + echo precious >foo.t/file && + cp foo.t/file expect && + + test_must_fail git reset --merge work 2>error && + test_cmp expect foo.t/file && + grep "Updating.*foo.t.*would lose untracked files" error + ) +' + +test_expect_success 'reset --keep will preserve untracked files/dirs' ' + test_setup_reset keep && + ( + cd reset_keep && + + mkdir foo.t && + echo precious >foo.t/file && + cp foo.t/file expect && + + test_must_fail git reset --merge work 2>error && + test_cmp expect foo.t/file && + grep "Updating.*foo.t.*would lose untracked files" error + ) +' + +test_setup_checkout_m () { + test_create_repo checkout && + ( + cd checkout && + test_commit init && + + test_write_lines file has some >filler && + git add filler && + git commit -m filler && + + git branch stable && + + git switch -c work && + echo stuff >notes.txt && + test_write_lines file has some words >filler && + git add notes.txt filler && + git commit -m filler && + + git checkout stable + ) +} + +test_expect_failure 'checkout -m does not nuke untracked file' ' + test_setup_checkout_m && + ( + cd checkout && + + # Tweak filler + test_write_lines this file has some >filler && + # Make an untracked file, save its contents in "expect" + echo precious >notes.txt && + cp notes.txt expect && + + test_must_fail git checkout -m work && + test_cmp expect notes.txt + ) +' + +test_setup_sequencing () { + test_create_repo sequencing_$1 && + ( + cd sequencing_$1 && + test_commit init && + + test_write_lines this file has some words >filler && + git add filler && + git commit -m filler && + + mkdir -p foo/bar && + test_commit foo/bar/baz && + + git branch simple && + git branch fooey && + + git checkout fooey && + git rm foo/bar/baz.t && + echo stuff >>filler && + git add -u && + git commit -m "changes" && + + git checkout simple && + echo items >>filler && + echo newstuff >>newfile && + git add filler newfile && + git commit -m another + ) +} + +test_expect_failure 'git rebase --abort and untracked files' ' + test_setup_sequencing rebase_abort_and_untracked && + ( + cd sequencing_rebase_abort_and_untracked && + git checkout fooey && + test_must_fail git rebase simple && + + cat init.t && + git rm init.t && + echo precious >init.t && + cp init.t expect && + git status --porcelain && + test_must_fail git rebase --abort && + test_cmp expect init.t + ) +' + +test_expect_failure 'git rebase fast forwarding and untracked files' ' + test_setup_sequencing rebase_fast_forward_and_untracked && + ( + cd sequencing_rebase_fast_forward_and_untracked && + git checkout init && + echo precious >filler && + cp filler expect && + test_must_fail git rebase init simple && + test_cmp expect filler + ) +' + +test_expect_failure 'git rebase --autostash and untracked files' ' + test_setup_sequencing rebase_autostash_and_untracked && + ( + cd sequencing_rebase_autostash_and_untracked && + git checkout simple && + git rm filler && + mkdir filler && + echo precious >filler/file && + cp filler/file expect && + git rebase --autostash init && + test_path_is_file filler/file + ) +' + +test_expect_failure 'git stash and untracked files' ' + test_setup_sequencing stash_and_untracked_files && + ( + cd sequencing_stash_and_untracked_files && + git checkout simple && + git rm filler && + mkdir filler && + echo precious >filler/file && + cp filler/file expect && + git status --porcelain && + git stash push && + git status --porcelain && + test_path_is_file filler/file + ) +' + +test_expect_failure 'git am --abort and untracked dir vs. unmerged file' ' + test_setup_sequencing am_abort_and_untracked && + ( + cd sequencing_am_abort_and_untracked && + git format-patch -1 --stdout fooey >changes.mbox && + test_must_fail git am --3way changes.mbox && + + # Delete the conflicted file; we will stage and commit it later + rm filler && + + # Put an unrelated untracked directory there + mkdir filler && + echo foo >filler/file1 && + echo bar >filler/file2 && + + test_must_fail git am --abort 2>errors && + test_path_is_dir filler && + grep "Updating .filler. would lose untracked files in it" errors + ) +' + +test_expect_failure 'git am --skip and untracked dir vs deleted file' ' + test_setup_sequencing am_skip_and_untracked && + ( + cd sequencing_am_skip_and_untracked && + git checkout fooey && + git format-patch -1 --stdout simple >changes.mbox && + test_must_fail git am --3way changes.mbox && + + # Delete newfile + rm newfile && + + # Put an unrelated untracked directory there + mkdir newfile && + echo foo >newfile/file1 && + echo bar >newfile/file2 && + + # Change our mind about resolutions, just skip this patch + test_must_fail git am --skip 2>errors && + test_path_is_dir newfile && + grep "Updating .newfile. would lose untracked files in it" errors + ) +' + +test_done