From patchwork Mon Aug 5 22:43:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Josh Steadmon X-Patchwork-Id: 11077839 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D883A912 for ; Mon, 5 Aug 2019 22:43:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C77D228970 for ; Mon, 5 Aug 2019 22:43:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BBA3028988; Mon, 5 Aug 2019 22:43:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 03B8528970 for ; Mon, 5 Aug 2019 22:43:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730900AbfHEWnv (ORCPT ); Mon, 5 Aug 2019 18:43:51 -0400 Received: from mail-pf1-f202.google.com ([209.85.210.202]:42947 "EHLO mail-pf1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728870AbfHEWnv (ORCPT ); Mon, 5 Aug 2019 18:43:51 -0400 Received: by mail-pf1-f202.google.com with SMTP id 21so54439075pfu.9 for ; Mon, 05 Aug 2019 15:43:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc:content-transfer-encoding; bh=804btAKQYijpGXbztWgXaMENWnVIMZchvAbFQB6y/yE=; b=GvkQuvX6HY3s+3Q2pUm5av/5ogxciZEWvLpTeVACvvOoR/i0ljfMIh430hJUUAH18y B3zEVG/VlFjGCiK9XBdW01buAwHCqem9M+CYo53HccCAn1wX6rmYf3X/isGguM6tYFnG q8bXMdDYVqYgGvfRrTzgK4F2h5FsOLIdtcpWxz9grdiVu6tQYheh2dEUYAcwcAnFXJix y/Uk28IfpkGe5xUi3+rYlZZpp2W/FHkmZ5jb7v6lo+WEtBJBJOX2/gmSbaxo7cgxdvAE PDJWqSeU88Go5+8aV2tZGDL3cOFfUt6ItELCg5CKNf9b6sB9/gpQSKd/CLwntLz/fXQZ 8iHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc:content-transfer-encoding; bh=804btAKQYijpGXbztWgXaMENWnVIMZchvAbFQB6y/yE=; b=m7fR1wqEQDXlk4XdkBZ15miR7JRobVea5meV4gDikUxM7rept+sukHCin4OFI3/zlO D3NTnpgRbE8UFZ6zy3nb91lWEF4MbuWTEb0lpNjJgDprmoV4SG6jifKP3r4QEaExOI+c nf421BLFM50FPJADjprLwBw0pfAirfvJsR6EPkyNY3YZRzv/baGxyhqaIJ6ZaERxz2cd ptsPGwFyJszc0ZjbksetJs8E+IDa0V9uhX3GINAtNkzwyXTTtLwvWYxaOOwMY4UdKRYL /nplOqXPJS0/1H6ozVpPcmNrFgGwJzQWclReQDW4DDX0atDeZIWezMB2hj5zlT4Sql6k Qphg== X-Gm-Message-State: APjAAAUEQQXBxjIAggAlTVRc4THA12PokEzvGwiZ/TFNCr5Drg8r5rFg i+1D2MAwb2xIFV+6SDUwYcYwK/zP8+vZgXjoeb7AvZzpiA5y52egFXItQ3no3/c5sun/eROPzoI zTlZKGs7vKaqXadpnG3aL2BltUU423m6yvnO90iTs/ZIsfhWfNeVORCRvjk5uRiM= X-Google-Smtp-Source: APXvYqx7ya5PciAsLjrorE3NmtA+AzNgGi3qKSZ+SXUwrmvIG2bDOplrdzwB829yV2v6f2CaEXyLwPoqrbCMxw== X-Received: by 2002:a63:6d8d:: with SMTP id i135mr156786pgc.303.1565045029816; Mon, 05 Aug 2019 15:43:49 -0700 (PDT) Date: Mon, 5 Aug 2019 15:43:38 -0700 In-Reply-To: Message-Id: <9210421fbb74c43a8b5e48478229a77ddd50ed3e.1565044345.git.steadmon@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.770.g0f2c4a37fd-goog Subject: [PATCH v4 3/4] git-merge: honor pre-merge-commit hook From: Josh Steadmon To: git@vger.kernel.org Cc: gitster@pobox.com, git@grubix.eu, martin.agren@gmail.com Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Michael J Gruber git-merge does not honor the pre-commit hook when doing automatic merge commits, and for compatibility reasons this is going to stay. Introduce a pre-merge-commit hook which is called for an automatic merge commit just like pre-commit is called for a non-automatic merge commit (or any other commit). [js: * renamed hook from "pre-merge" to "pre-merge-commit" * only discard the index if the hook is actually present * expanded githooks documentation entry * clarified that hook should write messages to stderr * squashed test changes from the original series' patch 4/4 * modified tests to follow new pattern from this series' patch 1/4 * added a test case for non-executable merge hooks * added a test case for failed merges * when testing that the merge hook did not run, make sure we actually have a merge to perform (by resetting the "side" branch to its original state). * reworded commit message ] Improved-by: Martin Ågren Signed-off-by: Michael J Gruber Signed-off-by: Martin Ågren Signed-off-by: Josh Steadmon --- Documentation/githooks.txt | 21 +++++ builtin/merge.c | 12 +++ ...-pre-commit-and-pre-merge-commit-hooks.sh} | 84 ++++++++++++++++++- templates/hooks--pre-merge-commit.sample | 13 +++ 4 files changed, 129 insertions(+), 1 deletion(-) rename t/{t7503-pre-commit-hook.sh => t7503-pre-commit-and-pre-merge-commit-hooks.sh} (63%) create mode 100755 templates/hooks--pre-merge-commit.sample diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt index 82cd573776..d9da474fb0 100644 --- a/Documentation/githooks.txt +++ b/Documentation/githooks.txt @@ -103,6 +103,27 @@ The default 'pre-commit' hook, when enabled--and with the `hooks.allownonascii` config option unset or set to false--prevents the use of non-ASCII filenames. +pre-merge-commit +~~~~~~~~~~~~~~~~ + +This hook is invoked by linkgit:git-merge[1]. It takes no parameters, and is +invoked after the merge has been carried out successfully and before +obtaining the proposed commit log message to +make a commit. Exiting with a non-zero status from this script +causes the `git merge` command to abort before creating a commit. + +The default 'pre-merge-commit' hook, when enabled, runs the +'pre-commit' hook, if the latter is enabled. + +This hook is invoked with the environment variable +`GIT_EDITOR=:` if the command will not bring up an editor +to modify the commit message. + +If the merge cannot be carried out automatically, the conflicts +need to be resolved and the result committed separately (see +linkgit:git-merge[1]). At that point, this hook will not be executed, +but the 'pre-commit' hook will, if it is enabled. + prepare-commit-msg ~~~~~~~~~~~~~~~~~~ diff --git a/builtin/merge.c b/builtin/merge.c index 4425a7a12e..bf0ae68c40 100644 --- a/builtin/merge.c +++ b/builtin/merge.c @@ -816,6 +816,18 @@ static void write_merge_heads(struct commit_list *); static void prepare_to_commit(struct commit_list *remoteheads) { struct strbuf msg = STRBUF_INIT; + const char *index_file = get_index_file(); + + if (run_commit_hook(0 < option_edit, index_file, "pre-merge-commit", NULL)) + abort_commit(remoteheads, NULL); + /* + * Re-read the index as pre-merge-commit hook could have updated it, + * and write it out as a tree. We must do this before we invoke + * the editor and after we invoke run_status above. + */ + if (find_hook("pre-merge-commit")) + discard_cache(); + read_cache_from(index_file); strbuf_addbuf(&msg, &merge_msg); if (squash) BUG("the control must not reach here under --squash"); diff --git a/t/t7503-pre-commit-hook.sh b/t/t7503-pre-commit-and-pre-merge-commit-hooks.sh similarity index 63% rename from t/t7503-pre-commit-hook.sh rename to t/t7503-pre-commit-and-pre-merge-commit-hooks.sh index a71ec31222..0700604f03 100755 --- a/t/t7503-pre-commit-hook.sh +++ b/t/t7503-pre-commit-and-pre-merge-commit-hooks.sh @@ -1,11 +1,12 @@ #!/bin/sh -test_description='pre-commit hook' +test_description='pre-commit and pre-merge-commit hooks' . ./test-lib.sh HOOKDIR="$(git rev-parse --git-dir)/hooks" PRECOMMIT="$HOOKDIR/pre-commit" +PREMERGE="$HOOKDIR/pre-merge-commit" # Prepare sample scripts that write their $0 to actual_hooks test_expect_success 'sample script setup' ' @@ -34,6 +35,30 @@ test_expect_success 'sample script setup' ' EOF ' +test_expect_success 'root commit' ' + echo "root" >file && + git add file && + git commit -m "zeroth" && + git checkout -b side && + echo "foo" >foo && + git add foo && + git commit -m "make it non-ff" && + git branch side-orig side && + git checkout master +' + +test_expect_success 'setup conflicting branches' ' + test_when_finished "git checkout master" && + git checkout -b conflicting-a master && + echo a >conflicting && + git add conflicting && + git commit -m conflicting-a && + git checkout -b conflicting-b master && + echo b >conflicting && + git add conflicting && + git commit -m conflicting-b +' + test_expect_success 'with no hook' ' test_when_finished "rm -f actual_hooks" && echo "foo" >file && @@ -42,6 +67,15 @@ test_expect_success 'with no hook' ' test_path_is_missing actual_hooks ' +test_expect_success 'with no hook (merge)' ' + test_when_finished "rm -f actual_hooks" && + git branch -f side side-orig && + git checkout side && + git merge -m "merge master" master && + git checkout master && + test_path_is_missing actual_hooks +' + test_expect_success '--no-verify with no hook' ' test_when_finished "rm -f actual_hooks" && echo "bar" >file && @@ -60,6 +94,34 @@ test_expect_success 'with succeeding hook' ' test_cmp expected_hooks actual_hooks ' +test_expect_success 'with succeeding hook (merge)' ' + test_when_finished "rm -f \"$PREMERGE\" expected_hooks actual_hooks" && + ln -s "success.sample" "$PREMERGE" && + echo "$PREMERGE" >expected_hooks && + git checkout side && + git merge -m "merge master" master && + git checkout master && + test_cmp expected_hooks actual_hooks +' + +test_expect_success 'automatic merge fails; both hooks are available' ' + test_when_finished "rm -f \"$PREMERGE\" \"$PRECOMMIT\"" && + test_when_finished "rm -f expected_hooks actual_hooks" && + test_when_finished "git checkout master" && + ln -s "success.sample" "$PREMERGE" && + ln -s "success.sample" "$PRECOMMIT" && + + git checkout conflicting-a && + test_must_fail git merge -m "merge conflicting-b" conflicting-b && + test_path_is_missing actual_hooks && + + echo "$PRECOMMIT" >expected_hooks && + echo a+b >conflicting && + git add conflicting && + git commit -m "resolve conflict" && + test_cmp expected_hooks actual_hooks +' + test_expect_success '--no-verify with succeeding hook' ' test_when_finished "rm -f \"$PRECOMMIT\" actual_hooks" && ln -s "success.sample" "$PRECOMMIT" && @@ -88,6 +150,16 @@ test_expect_success '--no-verify with failing hook' ' test_path_is_missing actual_hooks ' +test_expect_success 'with failing hook (merge)' ' + test_when_finished "rm -f \"$PREMERGE\" expected_hooks actual_hooks" && + ln -s "fail.sample" "$PREMERGE" && + echo "$PREMERGE" >expected_hooks && + git checkout side && + test_must_fail git merge -m "merge master" master && + git checkout master && + test_cmp expected_hooks actual_hooks +' + test_expect_success POSIXPERM 'with non-executable hook' ' test_when_finished "rm -f \"$PRECOMMIT\" actual_hooks" && ln -s "non-exec.sample" "$PRECOMMIT" && @@ -106,6 +178,16 @@ test_expect_success POSIXPERM '--no-verify with non-executable hook' ' test_path_is_missing actual_hooks ' +test_expect_success POSIXPERM 'with non-executable hook (merge)' ' + test_when_finished "rm -f \"$PREMERGE\" actual_hooks" && + ln -s "non-exec.sample" "$PREMERGE" && + git branch -f side side-orig && + git checkout side && + git merge -m "merge master" master && + git checkout master && + test_path_is_missing actual_hooks +' + test_expect_success 'with hook requiring GIT_PREFIX' ' test_when_finished "rm -rf \"$PRECOMMIT\" expected_hooks actual_hooks success" && ln -s "require-prefix.sample" "$PRECOMMIT" && diff --git a/templates/hooks--pre-merge-commit.sample b/templates/hooks--pre-merge-commit.sample new file mode 100755 index 0000000000..399eab1924 --- /dev/null +++ b/templates/hooks--pre-merge-commit.sample @@ -0,0 +1,13 @@ +#!/bin/sh +# +# An example hook script to verify what is about to be committed. +# Called by "git merge" with no arguments. The hook should +# exit with non-zero status after issuing an appropriate message to +# stderr if it wants to stop the merge commit. +# +# To enable this hook, rename this file to "pre-merge-commit". + +. git-sh-setup +test -x "$GIT_DIR/hooks/pre-commit" && + exec "$GIT_DIR/hooks/pre-commit" +: