From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.3 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 5F1841F6C1 for ; Mon, 15 Aug 2016 21:54:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753144AbcHOVyC (ORCPT ); Mon, 15 Aug 2016 17:54:02 -0400 Received: from mail-pf0-f175.google.com ([209.85.192.175]:35063 "EHLO mail-pf0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753123AbcHOVx5 (ORCPT ); Mon, 15 Aug 2016 17:53:57 -0400 Received: by mail-pf0-f175.google.com with SMTP id x72so20402225pfd.2 for ; Mon, 15 Aug 2016 14:53:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=USUxCAsW/vCTFTWAPUApco+lGKFg+Slojy/Lngyjnzk=; b=OaFgXzqfpEXoFHNk5GGDvl3sFsAVjFZPnS/Q+4JwR5ZLP4dOrjSkp0ApzT1KbLcX/c vFqMHV+FLffTxELCWM+ExJTs5hkbRQQCqPi1CiXKLWmFHTnv3ksQLKNHU4yQINVXBtR3 fDD6X69Yzos5E84V12QOxvGQPsMUISZ4Ae5rY2ktN3LxOF5jX4yho8DpYcmoe0WdyPne EwBQRqDJIHFNXaQwoBJ/VXdGTLghJS4cfvwC0ctoM89BzhZjxqAGAmh+t8eZ2edG19z1 0fk4GBYK3kPjG9R03WVzo+xX03rsxHg4wDW8bL8bWSVDX6W8DE6sweVS4ps9dnMEgYy+ ivvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=USUxCAsW/vCTFTWAPUApco+lGKFg+Slojy/Lngyjnzk=; b=X7x4YRPj0blDf51eEwkB7NLlziXeKC6+zudUATcBBREXeV1fJjm4TvR6ANiOTYJG2S v3oKITL26wdmfUh1OkCESBkNeYmTpdO6O6uSyljiqTV7hfkDLY9pK72rtqMTr8vLKVrr VHXlgXuyIbjtIGAZkZ32Fp1WnssZOQL55PW0doKMpLeBy4g1Jjl+t7ZgHLKNGUHU4BSc WuRuw0fezlIu7UeSoPUzHsSTg/WntxcGRD5AlkWDpSWjN+TgUHtJN9tD6oE8kII8ovPn I1MnYtPRLoshvM4MQ7hkWylIBvnfznLyExpwqPpQAtYEeAY4WY8vSlZiN2+SXxHGKqwv fNZQ== X-Gm-Message-State: AEkoousP7VsFN8O2YKtEDQ8zQUKraJyfkY3Z/+zZNTHTF63rzt0iy8Kd86Yt3o2uFyTTZ5vf X-Received: by 10.98.25.8 with SMTP id 8mr57892215pfz.94.1471298035115; Mon, 15 Aug 2016 14:53:55 -0700 (PDT) Received: from localhost ([2620:0:1000:5b10:fd0c:5bce:d30d:9f4d]) by smtp.gmail.com with ESMTPSA id 71sm33655589pfy.32.2016.08.15.14.53.54 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Mon, 15 Aug 2016 14:53:54 -0700 (PDT) From: Stefan Beller To: gitster@pobox.com Cc: git@vger.kernel.org, jrnieder@gmail.com, Jens.Lehmann@web.de, Stefan Beller Subject: [PATCHv5 8/8] clone: recursive and reference option triggers submodule alternates Date: Mon, 15 Aug 2016 14:53:27 -0700 Message-Id: <20160815215327.15682-9-sbeller@google.com> X-Mailer: git-send-email 2.9.2.730.g525ad04.dirty In-Reply-To: <20160815215327.15682-1-sbeller@google.com> References: <20160815215327.15682-1-sbeller@google.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org When `--recursive` and `--reference` is given, it is reasonable to expect that the submodules are created with references to the submodules of the given alternate for the superproject. An initial attempt to do this was presented to the mailing list, which used flags that are passed around ("--super-reference") that instructed the submodule clone to look for a reference in the submodules of the referenced superproject. This is not well thought out, as any further `submodule update` should also respect the initial setup. When a new submodule is added to the superproject and the alternate of the superproject does not know about that submodule yet, we rather error out informing the user instead of being unclear if we did or did not use a submodules alternate. To solve this problem introduce new options that store the configuration for what the user wanted originally. Signed-off-by: Stefan Beller --- Documentation/config.txt | 12 ++++++ builtin/clone.c | 19 +++++++++ builtin/submodule--helper.c | 87 ++++++++++++++++++++++++++++++++++++++++++ t/t7408-submodule-reference.sh | 43 +++++++++++++++++++++ 4 files changed, 161 insertions(+) diff --git a/Documentation/config.txt b/Documentation/config.txt index bc1c433..602f43a 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -2837,6 +2837,18 @@ submodule.fetchJobs:: in parallel. A value of 0 will give some reasonable default. If unset, it defaults to 1. +submodule.alternateLocation:: + Specifies how the submodules obtain alternates when submodules are + cloned. Possible values are `no`, `superproject`. + By default `no` is assumed, which doesn't add references. When the + value is set to `superproject` the submodule to be cloned computes + its alternates location relative to the superprojects alternate. + +submodule.alternateErrorStrategy + Specifies how to treat errors with the alternates for a submodule + as computed via `submodule.alternateLocation`. Possible values are + `ignore`, `info`, `die`. + tag.forceSignAnnotated:: A boolean to specify whether annotated tags created should be GPG signed. If `--annotate` is specified on the command line, it takes diff --git a/builtin/clone.c b/builtin/clone.c index 0182665..404c5e8 100644 --- a/builtin/clone.c +++ b/builtin/clone.c @@ -947,6 +947,25 @@ int cmd_clone(int argc, const char **argv, const char *prefix) else fprintf(stderr, _("Cloning into '%s'...\n"), dir); } + + if (option_recursive) { + if (option_required_reference.nr && + option_optional_reference.nr) + die(_("clone --recursive is not compatible with " + "both --reference and --reference-if-able")); + else if (option_required_reference.nr) { + string_list_append(&option_config, + "submodule.alternateLocation=superproject"); + string_list_append(&option_config, + "submodule.alternateErrorStrategy=die"); + } else if (option_optional_reference.nr) { + string_list_append(&option_config, + "submodule.alternateLocation=superproject"); + string_list_append(&option_config, + "submodule.alternateErrorStrategy=info"); + } + } + init_db(option_template, INIT_DB_QUIET); write_config(&option_config); diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c index 7096848..681b91d 100644 --- a/builtin/submodule--helper.c +++ b/builtin/submodule--helper.c @@ -472,6 +472,90 @@ static int clone_submodule(const char *path, const char *gitdir, const char *url return run_command(&cp); } +struct submodule_alternate_setup { + const char *submodule_name; + enum SUBMODULE_ALTERNATE_ERROR_MODE { + SUBMODULE_ALTERNATE_ERROR_DIE, + SUBMODULE_ALTERNATE_ERROR_INFO, + SUBMODULE_ALTERNATE_ERROR_IGNORE + } error_mode; + struct string_list *reference; +}; +#define SUBMODULE_ALTERNATE_SETUP_INIT { NULL, \ + SUBMODULE_ALTERNATE_ERROR_IGNORE, NULL } + +static int add_possible_reference_from_superproject( + struct alternate_object_database *alt, void *sas_cb) +{ + struct submodule_alternate_setup *sas = sas_cb; + + /* directory name, minus trailing slash */ + size_t namelen = alt->name - alt->base - 1; + struct strbuf name = STRBUF_INIT; + strbuf_add(&name, alt->base, namelen); + + /* + * If the alternate object store is another repository, try the + * standard layout with .git/modules//objects + */ + if (ends_with(name.buf, ".git/objects")) { + char *sm_alternate; + struct strbuf sb = STRBUF_INIT; + struct strbuf err = STRBUF_INIT; + strbuf_add(&sb, name.buf, name.len - strlen("objects")); + /* + * We need to end the new path with '/' to mark it as a dir, + * otherwise a submodule name containing '/' will be broken + * as the last part of a missing submodule reference would + * be taken as a file name. + */ + strbuf_addf(&sb, "modules/%s/", sas->submodule_name); + + sm_alternate = compute_alternate_path(sb.buf, &err); + if (sm_alternate) { + string_list_append(sas->reference, xstrdup(sb.buf)); + free(sm_alternate); + } else { + switch (sas->error_mode) { + case SUBMODULE_ALTERNATE_ERROR_DIE: + die(_("submodule '%s' cannot add alternate: %s"), + sas->submodule_name, err.buf); + case SUBMODULE_ALTERNATE_ERROR_INFO: + fprintf(stderr, _("submodule '%s' cannot add alternate: %s"), + sas->submodule_name, err.buf); + case SUBMODULE_ALTERNATE_ERROR_IGNORE: + ; /* nothing */ + } + } + strbuf_release(&sb); + } + + strbuf_release(&name); + return 0; +} + +static void prepare_possible_alternates(const char *sm_name, + struct string_list *reference) +{ + char *sm_alternate = NULL, *error_strategy = NULL; + struct submodule_alternate_setup sas = SUBMODULE_ALTERNATE_SETUP_INIT; + + git_config_get_string("submodule.alternateLocation", &sm_alternate); + if (!sm_alternate) + return; + + git_config_get_string("submodule.alternateErrorStrategy", &error_strategy); + + sas.submodule_name = sm_name; + sas.reference = reference; + if (!strcmp(error_strategy, "die")) + sas.error_mode = SUBMODULE_ALTERNATE_ERROR_DIE; + if (!strcmp(error_strategy, "info")) + sas.error_mode = SUBMODULE_ALTERNATE_ERROR_INFO; + if (!strcmp(sm_alternate, "superproject")) + foreach_alt_odb(add_possible_reference_from_superproject, &sas); +} + static int module_clone(int argc, const char **argv, const char *prefix) { const char *name = NULL, *url = NULL, *depth = NULL; @@ -532,6 +616,9 @@ static int module_clone(int argc, const char **argv, const char *prefix) if (!file_exists(sm_gitdir)) { if (safe_create_leading_directories_const(sm_gitdir) < 0) die(_("could not create directory '%s'"), sm_gitdir); + + prepare_possible_alternates(name, &reference); + if (clone_submodule(path, sm_gitdir, url, depth, &reference, quiet)) die(_("clone of '%s' into submodule path '%s' failed"), url, path); diff --git a/t/t7408-submodule-reference.sh b/t/t7408-submodule-reference.sh index dff47af..1c1e289 100755 --- a/t/t7408-submodule-reference.sh +++ b/t/t7408-submodule-reference.sh @@ -82,4 +82,47 @@ test_expect_success 'updating superproject keeps alternates' ' test_alternate_is_used super-clone/.git/modules/sub/objects/info/alternates super-clone/sub ' +test_expect_success 'submodules use alternates when cloning a superproject' ' + test_when_finished "rm -rf super-clone" && + git clone --reference super --recursive super super-clone && + ( + cd super-clone && + # test superproject has alternates setup correctly + test_alternate_is_used .git/objects/info/alternates . && + # test submodule has correct setup + test_alternate_is_used .git/modules/sub/objects/info/alternates sub + ) +' + +test_expect_success 'missing submodule alternate fails clone and submodule update' ' + test_when_finished "rm -rf super-clone" && + git clone super super2 && + test_must_fail git clone --recursive --reference super2 super2 super-clone && + ( + cd super-clone && + # test superproject has alternates setup correctly + test_alternate_is_used .git/objects/info/alternates . && + # update of the submodule succeeds + test_must_fail git submodule update --init && + # and we have no alternates: + test_must_fail test_alternate_is_used .git/modules/sub/objects/info/alternates sub && + test_must_fail test_path_is_file sub/file1 + ) +' + +test_expect_success 'ignoring missing submodule alternates passes clone and submodule update' ' + test_when_finished "rm -rf super-clone" && + git clone --reference-if-able super2 --recursive super2 super-clone && + ( + cd super-clone && + # test superproject has alternates setup correctly + test_alternate_is_used .git/objects/info/alternates . && + # update of the submodule succeeds + git submodule update --init && + # and we have no alternates: + test_must_fail test_alternate_is_used .git/modules/sub/objects/info/alternates sub && + test_path_is_file sub/file1 + ) +' + test_done -- 2.9.2.730.g525ad04.dirty