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-Status: No, score=-11.4 required=3.0 tests=AWL,BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS,USER_IN_DEF_DKIM_WL shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by dcvr.yhbt.net (Postfix) with ESMTP id B8A491F934 for ; Tue, 2 Feb 2021 02:19:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230033AbhBBCP4 (ORCPT ); Mon, 1 Feb 2021 21:15:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39428 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229543AbhBBCPy (ORCPT ); Mon, 1 Feb 2021 21:15:54 -0500 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9413C0613D6 for ; Mon, 1 Feb 2021 18:15:13 -0800 (PST) Received: by mail-pf1-x449.google.com with SMTP id t16so12105751pfh.22 for ; Mon, 01 Feb 2021 18:15:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=l00SPAQSChgCaMq4Td9/vsULVBu32IX5YV2xaoYK8pE=; b=Z3OBtchrI0OKNWa20roItZ2RhfxWGXKqr9DjXna/1kn7nfRg/FhqMXvy1LRkWaEdSH n0tDfoBdAMsSRzfGueehe3pXiFoYI1c2MqOrTrNpQ1RB7GT6ORKMcVTYUtcS/R2fSvta nzZmQNHJObHbIZWhbWPfWsb0jVGUmpZzLTlAsTWXfjDBFkSkIk/aPHYzzCasDdhL9SVn XUTTqPtpTB1yjT/ERv4FmWjq5iS41ju47bWmq/ndPJQMQf6UctgOR2BHnklh/eLoMatp VEyTFR4IQ1QQC4lXLqZgs3UILiaTV+9mIIXkouvOxVRzlZyFzjesDgk1+p0Dc0LhLZxL CFww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=l00SPAQSChgCaMq4Td9/vsULVBu32IX5YV2xaoYK8pE=; b=aHwJa9bKaCT6ta022MQ2DhY5R1Jy0VSlOCpPKkKPb/9bB7WmG131FY/q4p7kNOZ6SK Ffc+OcIiWVY0KtIMuKMqn5u1hHtrz6V3b1M5FQH7VjjONfh1A7A/kQtrGpaJyN3TQOeG j/o49MmgTdM+HDMlIbCBDtGUJ1OSW0/FaCS499YPpd2lfbE4zMRbEd/apkL0E5TMmdZQ ct6g1gtShQk8+2GKiKD2WN1/EnHe+muGrtPeGTJjC2TJC4adDbvs15r7TKlFvgfOsqW1 5ToMoLYwK30uLnqXCUuhSKXYOvwxluw3DG7k4Ea1F8SlyQ+GGkDuxCEMRMcfaXmaTtYT 6dEg== X-Gm-Message-State: AOAM530tAI6/JYLvMn5+Yv72+DhjfmFlfr8f2iHcO27uhdPteVBqsIAK HyPRjd4SZG0imGM08Q0bstqc77eumhtT7gZpL6NB8ngDMyxYqU1TdI7xGNNW0p/VEJ2BbV+IFfv iFCmPSA9lv700j39Elx3qQ/80/rr6eUzBnRtMznCQMoVB/bUKBBnQ5p4A3QBhHcnAH3ta3wnj26 H+ X-Google-Smtp-Source: ABdhPJwXDjA9ko1BHG9fVQwrG39gPTm/pIXtiulU5WA/riOms/0vG3TIHsMOrJhaJvOvmD9oC5+R8DYGGi7HulefLJ7z Sender: "jonathantanmy via sendgmr" X-Received: from twelve4.c.googlers.com ([fda3:e722:ac3:10:24:72f4:c0a8:437a]) (user=jonathantanmy job=sendgmr) by 2002:a63:1220:: with SMTP id h32mr19962536pgl.309.1612232113306; Mon, 01 Feb 2021 18:15:13 -0800 (PST) Date: Mon, 1 Feb 2021 18:15:01 -0800 In-Reply-To: Message-Id: <45a48ccc0d828db6107862620dd14128c50368e4.1612231707.git.jonathantanmy@google.com> Mime-Version: 1.0 References: <20201208013121.677494-1-jonathantanmy@google.com> X-Mailer: git-send-email 2.30.0.365.g02bc693789-goog Subject: [PATCH v6 3/3] clone: respect remote unborn HEAD From: Jonathan Tan To: git@vger.kernel.org Cc: Jonathan Tan , gitster@pobox.com, peff@peff.net Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Teach Git to use the "unborn" feature introduced in a previous patch as follows: Git will always send the "unborn" argument if it is supported by the server. During "git clone", if cloning an empty repository, Git will use the new information to determine the local branch to create. In all other cases, Git will ignore it. Signed-off-by: Jonathan Tan Signed-off-by: Junio C Hamano --- Documentation/config/init.txt | 2 +- builtin/clone.c | 16 ++++++++++++++-- connect.c | 28 ++++++++++++++++++++++++++-- t/t5606-clone-options.sh | 8 +++++--- t/t5702-protocol-v2.sh | 25 +++++++++++++++++++++++++ transport.h | 8 ++++++++ 6 files changed, 79 insertions(+), 8 deletions(-) diff --git a/Documentation/config/init.txt b/Documentation/config/init.txt index dc77f8c844..79c79d6617 100644 --- a/Documentation/config/init.txt +++ b/Documentation/config/init.txt @@ -4,4 +4,4 @@ init.templateDir:: init.defaultBranch:: Allows overriding the default branch name e.g. when initializing - a new repository or when cloning an empty repository. + a new repository. diff --git a/builtin/clone.c b/builtin/clone.c index 211d4f54b0..09dcd97a2e 100644 --- a/builtin/clone.c +++ b/builtin/clone.c @@ -1330,8 +1330,19 @@ int cmd_clone(int argc, const char **argv, const char *prefix) remote_head = NULL; option_no_checkout = 1; if (!option_bare) { - const char *branch = git_default_branch_name(); - char *ref = xstrfmt("refs/heads/%s", branch); + const char *branch; + char *ref; + + if (transport_ls_refs_options.unborn_head_target && + skip_prefix(transport_ls_refs_options.unborn_head_target, + "refs/heads/", &branch)) { + ref = transport_ls_refs_options.unborn_head_target; + transport_ls_refs_options.unborn_head_target = NULL; + create_symref("HEAD", ref, reflog_msg.buf); + } else { + branch = git_default_branch_name(); + ref = xstrfmt("refs/heads/%s", branch); + } install_branch_config(0, branch, remote_name, ref); free(ref); @@ -1385,5 +1396,6 @@ int cmd_clone(int argc, const char **argv, const char *prefix) junk_mode = JUNK_LEAVE_ALL; strvec_clear(&transport_ls_refs_options.ref_prefixes); + free(transport_ls_refs_options.unborn_head_target); return err; } diff --git a/connect.c b/connect.c index 328c279250..879669df93 100644 --- a/connect.c +++ b/connect.c @@ -376,7 +376,8 @@ struct ref **get_remote_heads(struct packet_reader *reader, } /* Returns 1 when a valid ref has been added to `list`, 0 otherwise */ -static int process_ref_v2(struct packet_reader *reader, struct ref ***list) +static int process_ref_v2(struct packet_reader *reader, struct ref ***list, + char **unborn_head_target) { int ret = 1; int i = 0; @@ -397,6 +398,25 @@ static int process_ref_v2(struct packet_reader *reader, struct ref ***list) goto out; } + if (!strcmp("unborn", line_sections.items[i].string)) { + i++; + if (unborn_head_target && + !strcmp("HEAD", line_sections.items[i++].string)) { + /* + * Look for the symref target (if any). If found, + * return it to the caller. + */ + for (; i < line_sections.nr; i++) { + const char *arg = line_sections.items[i].string; + + if (skip_prefix(arg, "symref-target:", &arg)) { + *unborn_head_target = xstrdup(arg); + break; + } + } + } + goto out; + } if (parse_oid_hex_algop(line_sections.items[i++].string, &old_oid, &end, reader->hash_algo) || *end) { ret = 0; @@ -461,6 +481,8 @@ struct ref **get_remote_refs(int fd_out, struct packet_reader *reader, const char *hash_name; struct strvec *ref_prefixes = transport_options ? &transport_options->ref_prefixes : NULL; + char **unborn_head_target = transport_options ? + &transport_options->unborn_head_target : NULL; *list = NULL; if (server_supports_v2("ls-refs", 1)) @@ -490,6 +512,8 @@ struct ref **get_remote_refs(int fd_out, struct packet_reader *reader, if (!for_push) packet_write_fmt(fd_out, "peel\n"); packet_write_fmt(fd_out, "symrefs\n"); + if (server_supports_feature("ls-refs", "unborn", 0)) + packet_write_fmt(fd_out, "unborn\n"); for (i = 0; ref_prefixes && i < ref_prefixes->nr; i++) { packet_write_fmt(fd_out, "ref-prefix %s\n", ref_prefixes->v[i]); @@ -498,7 +522,7 @@ struct ref **get_remote_refs(int fd_out, struct packet_reader *reader, /* Process response from server */ while (packet_reader_read(reader) == PACKET_READ_NORMAL) { - if (!process_ref_v2(reader, &list)) + if (!process_ref_v2(reader, &list, unborn_head_target)) die(_("invalid ls-refs response: %s"), reader->line); } diff --git a/t/t5606-clone-options.sh b/t/t5606-clone-options.sh index 7f082fb23b..0111d4e8bd 100755 --- a/t/t5606-clone-options.sh +++ b/t/t5606-clone-options.sh @@ -102,11 +102,13 @@ test_expect_success 'redirected clone -v does show progress' ' ' test_expect_success 'chooses correct default initial branch name' ' - git init --bare empty && + GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME= \ + git -c init.defaultBranch=foo init --bare empty && + test_config -C empty lsrefs.allowUnborn true && GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME= \ git -c init.defaultBranch=up clone empty whats-up && - test refs/heads/up = $(git -C whats-up symbolic-ref HEAD) && - test refs/heads/up = $(git -C whats-up config branch.up.merge) + test refs/heads/foo = $(git -C whats-up symbolic-ref HEAD) && + test refs/heads/foo = $(git -C whats-up config branch.foo.merge) ' test_expect_success 'guesses initial branch name correctly' ' diff --git a/t/t5702-protocol-v2.sh b/t/t5702-protocol-v2.sh index 7d5b17909b..a8ef92b644 100755 --- a/t/t5702-protocol-v2.sh +++ b/t/t5702-protocol-v2.sh @@ -209,6 +209,31 @@ test_expect_success 'clone with file:// using protocol v2' ' grep "ref-prefix refs/tags/" log ' +test_expect_success 'clone of empty repo propagates name of default branch' ' + test_when_finished "rm -rf file_empty_parent file_empty_child" && + + GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME= \ + git -c init.defaultBranch=mydefaultbranch init file_empty_parent && + + GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME= \ + git -c init.defaultBranch=main -c protocol.version=2 \ + clone "file://$(pwd)/file_empty_parent" file_empty_child && + grep "refs/heads/mydefaultbranch" file_empty_child/.git/HEAD +' + +test_expect_success '...but not if explicitly forbidden by config' ' + test_when_finished "rm -rf file_empty_parent file_empty_child" && + + GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME= \ + git -c init.defaultBranch=mydefaultbranch init file_empty_parent && + test_config -C file_empty_parent lsrefs.allowUnborn false && + + GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME= \ + git -c init.defaultBranch=main -c protocol.version=2 \ + clone "file://$(pwd)/file_empty_parent" file_empty_child && + ! grep "refs/heads/mydefaultbranch" file_empty_child/.git/HEAD +' + test_expect_success 'fetch with file:// using protocol v2' ' test_when_finished "rm -f log" && diff --git a/transport.h b/transport.h index 1f5b60e4d3..24e15799e7 100644 --- a/transport.h +++ b/transport.h @@ -243,6 +243,14 @@ struct transport_ls_refs_options { * provided ref_prefixes. */ struct strvec ref_prefixes; + + /* + * If unborn_head_target is not NULL, and the remote reports HEAD as + * pointing to an unborn branch, transport_get_remote_refs() stores the + * unborn branch in unborn_head_target. It should be freed by the + * caller. + */ + char *unborn_head_target; }; #define TRANSPORT_LS_REFS_OPTIONS_INIT { STRVEC_INIT } -- 2.30.0.365.g02bc693789-goog