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=-3.9 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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=ham 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 48F151F463 for ; Fri, 20 Dec 2019 17:10:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727472AbfLTRKA (ORCPT ); Fri, 20 Dec 2019 12:10:00 -0500 Received: from mail-ed1-f67.google.com ([209.85.208.67]:40013 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727419AbfLTRJ5 (ORCPT ); Fri, 20 Dec 2019 12:09:57 -0500 Received: by mail-ed1-f67.google.com with SMTP id b8so8932190edx.7 for ; Fri, 20 Dec 2019 09:09:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=Jo5b/Q7DfXWd7kPKZgbR5K0YKULNIodOCBlnoUrwzRk=; b=DhgCEbrJApYFj1e8C+IRD7ox741q1zR7NCXwaVqYWBdHAKIAmOscw8aEAZjLD00Qh+ W3MIe7uPEkugAJbpFITgYgUSq+aidmyFH83EVUVbBK5KtOdsirgbS5c06PmuZaywqOnN 0RZBKPVt8PIYIweWEdGtTOcsUqKbQcfomMHlDHjlrz7WVhwH5AeAQ15bjYzpKe7+GRtm F15nH3lE6RvHTimEbmU5wxRxUJkDV60fCk+tNcyP/BXvTYaNKMq1ba9NQ9CHdR6cUFiC OROUhCDv/VeYc5g+WADBqrFMQha6gL4hPAx+6KgntSm0B7XSVYT1FiWaQh3o81OZJOhn qugg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=Jo5b/Q7DfXWd7kPKZgbR5K0YKULNIodOCBlnoUrwzRk=; b=WkI7yOt8q8EGaqAdZ/NZeFH3RFvsAONs9+BwS8fRk72QSBEqmuH43CetRTCnKtZ0ba Vj3oOxk08F/121mnILjMTTLD5PyMa339pPtSBAmlxBWuw2jRgf+p4bwv7MsQ6RJ+KUQb zwnrU00fxDh7DCWNQLAgviCvPSvalPN5ZCwMcS2I69kCGtmC1rJQV1yujbhZkR4FuD4d vo8c8LaJinY0hZhWrdLEIvHcwQyFqKdMMonvrpX+xPbIDCQhjCOQx0XaQSRhAp3nW5gJ 5iGqvucpKlkaEszN61zpmWIsjP/Trgm8SzNzIAhcgT9FuKJhlu1PNvi5HtlDR+kjLklF iU/A== X-Gm-Message-State: APjAAAUFJbMiSv4AeUWauUdo6O60BufFGC6Zgl6XBxgzCemLpIjIoDcE CVbkEuAF3Kx0jmYS9hLtIGFj9i1P X-Google-Smtp-Source: APXvYqwseB5Qo3nfKQJLhB4YqVkU7GMkWpcZA8tV1G1SrcSYYmLA35zoRZwLvovDhB0qkow1knaPKw== X-Received: by 2002:a17:906:2db1:: with SMTP id g17mr17238103eji.240.1576861795421; Fri, 20 Dec 2019 09:09:55 -0800 (PST) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id e1sm1029849edn.86.2019.12.20.09.09.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 20 Dec 2019 09:09:55 -0800 (PST) Message-Id: In-Reply-To: References: From: "Elijah Newren via GitGitGadget" Date: Fri, 20 Dec 2019 17:09:40 +0000 Subject: [PATCH 07/15] rebase: allow more types of rebases to fast-forward Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit MIME-Version: 1.0 To: git@vger.kernel.org Cc: Johannes.Schindelin@gmx.de, phillip.wood@dunelm.org.uk, liu.denton@gmail.com, gitster@pobox.com, plroskin@gmail.com, Junio C Hamano , Elijah Newren Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Elijah Newren In the past, we dis-allowed rebases using the interactive backend from performing a fast-forward to short-circuit the rebase operation. This made sense for explicitly interactive rebases and some implicitly interactive rebases, but certainly became overly stringent when the merge backend was re-implemented via the interactive backend. Just as the am-based rebase has always had to disable the fast-forward based on a variety of conditions or flags (e.g. --signoff, --whitespace, etc.), we need to do the same but now with a few more options. However, continuing to use REBASE_FORCE for tracking this is problematic because the interactive backend used it for a different purpose. (When REBASE_FORCE wasn't set, the interactive backend would not fast-forward the whole series but would fast-forward individual "pick" commits at the beginning of the todo list, and then a squash or something would cause it to start generating new commits.) So, introduce a new allow_preemptive_ff flag contained within cmd_rebase() and use it to track whether we are going to allow a pre-emptive fast-forward that short-circuits the whole rebase. Signed-off-by: Elijah Newren --- builtin/rebase.c | 18 ++++++++++++++---- t/t3432-rebase-fast-forward.sh | 2 ++ 2 files changed, 16 insertions(+), 4 deletions(-) diff --git a/builtin/rebase.c b/builtin/rebase.c index b320bb3a30..67bccd876f 100644 --- a/builtin/rebase.c +++ b/builtin/rebase.c @@ -1497,6 +1497,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) struct object_id squash_onto; char *squash_onto_name = NULL; int reschedule_failed_exec = -1; + int allow_preemptive_ff = 1; struct option builtin_rebase_options[] = { OPT_STRING(0, "onto", &options.onto_name, N_("revision"), @@ -1808,11 +1809,18 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) options.ignore_date) options.flags |= REBASE_FORCE; + if ((options.flags & REBASE_INTERACTIVE_EXPLICIT) || + (action != ACTION_NONE) || + (exec.nr > 0) || + options.autosquash) { + allow_preemptive_ff = 0; + } + for (i = 0; i < options.git_am_opts.argc; i++) { const char *option = options.git_am_opts.argv[i], *p; if (!strcmp(option, "--whitespace=fix") || !strcmp(option, "--whitespace=strip")) - options.flags |= REBASE_FORCE; + allow_preemptive_ff = 0; else if (skip_prefix(option, "-C", &p)) { while (*p) if (!isdigit(*(p++))) @@ -2148,12 +2156,14 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) /* * Check if we are already based on onto with linear history, * in which case we could fast-forward without replacing the commits - * with new commits recreated by replaying their changes. This - * optimization must not be done if this is an interactive rebase. + * with new commits recreated by replaying their changes. + * + * Note that can_fast_forward() initializes merge_base, so we have to + * call it before checking allow_preemptive_ff. */ if (can_fast_forward(options.onto, options.upstream, options.restrict_revision, &options.orig_head, &merge_base) && - !is_interactive(&options)) { + allow_preemptive_ff) { int flag; if (!(options.flags & REBASE_FORCE)) { diff --git a/t/t3432-rebase-fast-forward.sh b/t/t3432-rebase-fast-forward.sh index 3879a43fa0..58c91c6899 100755 --- a/t/t3432-rebase-fast-forward.sh +++ b/t/t3432-rebase-fast-forward.sh @@ -30,6 +30,8 @@ test_rebase_same_head () { shift && test_rebase_same_head_ $status_n $what_n $cmp_n "" "$*" && test_rebase_same_head_ $status_f $what_f $cmp_f " --no-ff" "$*" + test_rebase_same_head_ $status_n $what_n $cmp_n " --merge" "$*" && + test_rebase_same_head_ $status_f $what_f $cmp_f " --merge --no-ff" "$*" } test_rebase_same_head_ () { -- gitgitgadget