From patchwork Fri Apr 14 15:28:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Jarry X-Patchwork-Id: 13211717 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24BABC77B72 for ; Fri, 14 Apr 2023 15:30:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231343AbjDNPaX (ORCPT ); Fri, 14 Apr 2023 11:30:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229774AbjDNPaN (ORCPT ); Fri, 14 Apr 2023 11:30:13 -0400 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C61FDCC0E for ; Fri, 14 Apr 2023 08:29:53 -0700 (PDT) Received: (Authenticated sender: robin@jarry.cc) by mail.gandi.net (Postfix) with ESMTPSA id 4DFE0C0005; Fri, 14 Apr 2023 15:28:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jarry.cc; s=gm1; t=1681486129; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Zoi3G523tpfQ+ZRFOnK/U1B/TE39a2DcJXsuClt2DiQ=; b=AZG21OqyknbJBUZhZ9b1tTR/SJKym49mnAYxAVeteLDhfZgHH/2EGtRrNa1EL6pqYpnyhS y26MdCzy+k4tAL4icZ6icymyIdWElS033aP5JNCHfWdnIGAw29zv0HzD6VMBsH2yOF4YMk v2NTBZrWgw6musZrRgrVKxx1w3UkrQgDdOEqnusbjAwyiWeZWcs5xBuuhdBi+phbiv4KVP Lhcp+blMW7nl9xwmeyP7oqYQ2RABkuZ/Ue5Y+LVwnqMval6a5pUxKWbvdn+cNVVRdVy6Vy WhhGawmbt7LUZeucxs4iwRNITPWIygemD2NtZotTIBs6pyl3PYEKJO9l5FZ73w== From: Robin Jarry To: git@vger.kernel.org Cc: Phillip Wood , =?utf-8?b?w4Z2YXIgQXJuZmrDtnI=?= =?utf-8?b?w7AgQmphcm1hc29u?= , Tim Culverhouse , Nicolas Dichtel , Bagas Sanjaya , Junio C Hamano , Eric Sunshine , Michael Strawbridge , Robin Jarry Subject: [PATCH v4] send-email: export patch counters in validate environment Date: Fri, 14 Apr 2023 17:28:43 +0200 Message-Id: <20230414152843.659667-1-robin@jarry.cc> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230412214502.90174-1-robin@jarry.cc> References: <20230412214502.90174-1-robin@jarry.cc> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org When sending patch series (with a cover-letter or not) sendemail-validate is called with every email/patch file independently from the others. When one of the patches depends on a previous one, it may not be possible to use this hook in a meaningful way. A hook that wants to check some property of the whole series needs to know which patch is the final one. Expose the current and total number of patches to the hook via the GIT_SENDEMAIL_PATCH_COUNTER and GIT_SENDEMAIL_PATCH_TOTAL environment variables so that both incremental and global validation is possible. Sharing any other state between successive invocations of the validate hook must be done via external means. For example, by storing it in a git config sendemail.validateWorktree entry. Add a sample script with placeholder validations and update tests to check that the counters are properly exported. Suggested-by: Phillip Wood Signed-off-by: Robin Jarry --- Notes: v3 -> v4: * Added test case. * Make sure to always cleanup the temp worktree. * Add configuration knobs to tweak the remote and ref on which to check if the patches apply without conflicts. Documentation/githooks.txt | 22 +++++++ git-send-email.perl | 17 ++++- t/t9001-send-email.sh | 31 +++++++++ templates/hooks--sendemail-validate.sample | 77 ++++++++++++++++++++++ 4 files changed, 146 insertions(+), 1 deletion(-) create mode 100755 templates/hooks--sendemail-validate.sample diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt index 62908602e7be..c8e55b2613f5 100644 --- a/Documentation/githooks.txt +++ b/Documentation/githooks.txt @@ -600,6 +600,28 @@ the name of the file that holds the e-mail to be sent. Exiting with a non-zero status causes `git send-email` to abort before sending any e-mails. +The following environment variables are set when executing the hook. + +`GIT_SENDEMAIL_FILE_COUNTER`:: + A 1-based counter incremented by one for every file holding an e-mail + to be sent (excluding any FIFOs). This counter does not follow the + patch series counter scheme. It will always start at 1 and will end at + GIT_SENDEMAIL_FILE_TOTAL. + +`GIT_SENDEMAIL_FILE_TOTAL`:: + The total number of files that will be sent (excluding any FIFOs). This + counter does not follow the patch series counter scheme. It will always + be equal to the number of files being sent, whether there is a cover + letter or not. + +These variables may for instance be used to validate patch series. + +The sample `sendemail-validate` hook that comes with Git checks that all sent +patches (excluding the cover letter) can be applied on top of the upstream +repository default branch without conflicts. Some placeholders are left for +additional validation steps to be performed after all patches of a given series +have been applied. + fsmonitor-watchman ~~~~~~~~~~~~~~~~~~ diff --git a/git-send-email.perl b/git-send-email.perl index 07f2a0cbeaad..497ec0354790 100755 --- a/git-send-email.perl +++ b/git-send-email.perl @@ -795,11 +795,26 @@ sub is_format_patch_arg { @files = handle_backup_files(@files); if ($validate) { + # FIFOs can only be read once, exclude them from validation. + my @real_files = (); foreach my $f (@files) { unless (-p $f) { - validate_patch($f, $target_xfer_encoding); + push(@real_files, $f); } } + + # Run the loop once again to avoid gaps in the counter due to FIFO + # arguments provided by the user. + my $num = 1; + my $num_files = scalar @real_files; + $ENV{GIT_SENDEMAIL_FILE_TOTAL} = "$num_files"; + foreach my $r (@real_files) { + $ENV{GIT_SENDEMAIL_FILE_COUNTER} = "$num"; + validate_patch($r, $target_xfer_encoding); + $num += 1; + } + delete $ENV{GIT_SENDEMAIL_FILE_COUNTER}; + delete $ENV{GIT_SENDEMAIL_FILE_TOTAL}; } if (@files) { diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh index 323952a572d6..7c7625759883 100755 --- a/t/t9001-send-email.sh +++ b/t/t9001-send-email.sh @@ -2326,6 +2326,37 @@ test_expect_success $PREREQ 'invoke hook' ' ) ' +expected_file_counter_output () { + total=$1 + count=0 + while test $count -ne $total + do + count=$((count + 1)) && + echo "$count/$total" || return + done +} + +test_expect_success $PREREQ '--validate hook allows counting of messages' ' + test_when_finished "rm -rf my-hooks.log" && + test_config core.hooksPath "my-hooks" && + mkdir -p my-hooks && + + write_script my-hooks/sendemail-validate <<-\EOF && + num=$GIT_SENDEMAIL_FILE_COUNTER && + tot=$GIT_SENDEMAIL_FILE_TOTAL && + echo "$num/$tot" >>my-hooks.log || exit 1 + EOF + + >my-hooks.log && + expected_file_counter_output 4 >expect && + git send-email \ + --from="Example " \ + --to=nobody@example.com \ + --smtp-server="$(pwd)/fake.sendmail" \ + --validate -3 --cover-letter --force && + test_cmp expect my-hooks.log +' + test_expect_success $PREREQ 'test that send-email works outside a repo' ' nongit git send-email \ --from="Example " \ diff --git a/templates/hooks--sendemail-validate.sample b/templates/hooks--sendemail-validate.sample new file mode 100755 index 000000000000..dcefcc1f992f --- /dev/null +++ b/templates/hooks--sendemail-validate.sample @@ -0,0 +1,77 @@ +#!/bin/sh + +# An example hook script to validate a patch (and/or patch series) before +# sending it via email. +# +# The hook should exit with non-zero status after issuing an appropriate +# message if it wants to prevent the email(s) from being sent. +# +# To enable this hook, rename this file to "sendemail-validate". +# +# By default, it will only check that the patch(es) can be applied on top of +# the default upstream branch without conflicts in a secondary worktree. After +# validation (successful or not) of the last patch of a series, the worktree +# will be deleted. +# +# The following config variables can be set to change the default remote and +# remote ref that are used to apply the patches against: +# +# sendemail.validateRemote (default: origin) +# sendemail.validateRemoteRef (default: HEAD) +# +# Replace the TODO placeholders with appropriate checks according to your +# needs. + +validate_cover_letter() { + file="$1" + # TODO: Replace with appropriate checks (e.g. spell checking). + true +} + +validate_patch() { + file="$1" + # Ensure that the patch applies without conflicts. + git am -3 "$file" || return + # TODO: Replace with appropriate checks for this patch + # (e.g. checkpatch.pl). + true +} + +validate_series() { + # TODO: Replace with appropriate checks for the whole series + # (e.g. quick build, coding style checks, etc.). + true +} + +# main ------------------------------------------------------------------------- + +if test "$GIT_SENDEMAIL_FILE_COUNTER" = 1 +then + remote=$(git config --default origin --get sendemail.validateRemote) && + ref=$(git config --default HEAD --get sendemail.validateRemoteRef) && + worktree=$(mktemp --tmpdir -d sendemail-validate.XXXXXXX) && + git worktree add -fd --checkout "$worktree" "refs/remotes/$remote/$ref" && + git config --replace-all sendemail.validateWorktree "$worktree" && +else + worktree=$(git config --get sendemail.validateWorktree) +fi || { + echo "sendemail-validate: error: failed to prepare worktree" >&2 + exit 1 +} + +unset GIT_DIR GIT_WORK_TREE +cd "$worktree" && + +if grep -q "^diff --git " "$1" +then + validate_patch "$1" +else + validate_cover_letter "$1" +fi && + +if test "$GIT_SENDEMAIL_FILE_COUNTER" = "$GIT_SENDEMAIL_FILE_TOTAL" +then + git config --unset-all sendemail.validateWorktree && + trap 'git worktree remove -ff "$worktree"' EXIT && + validate_series +fi