From patchwork Thu Jun 17 17:13:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Tan X-Patchwork-Id: 12328961 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BA1E9C2B9F4 for ; Thu, 17 Jun 2021 17:13:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98E8B613CB for ; Thu, 17 Jun 2021 17:13:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232046AbhFQRPv (ORCPT ); Thu, 17 Jun 2021 13:15:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45104 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232041AbhFQRPs (ORCPT ); Thu, 17 Jun 2021 13:15:48 -0400 Received: from mail-qk1-x74a.google.com (mail-qk1-x74a.google.com [IPv6:2607:f8b0:4864:20::74a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46482C061574 for ; Thu, 17 Jun 2021 10:13:39 -0700 (PDT) Received: by mail-qk1-x74a.google.com with SMTP id d194-20020a3768cb0000b02903ad9d001bb6so2598811qkc.7 for ; Thu, 17 Jun 2021 10:13:39 -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; bh=6hk4zM3kNAj5NMgi0ayc8vw+3/YdS03ZN5V+i3iB+nQ=; b=mOMTrg6hqRAb3eyhtzgAnGI7EbtbMKAYnIo3Xzo8bZ9MmZaG11xhECucC59Cy8NsyA tFCRAiG/+bCDMSlwfCeQldJmK9amvU4uOFRANtysqRvpgaVz1qhscX6zvvBQGn4Hi+nt +9opQF8/915M7TogNigYjrneR5ao7Hro7nWJ0kKeeEXMP0pEoxIFogux/Tlcp4neFgOb E09+iNu0+P1E9V1deH9MzQwb3xZYkZvlcnFatq3SiTomjJR1nrKaQY73ameMa5yzrVm8 wfov97dqdmW+PcXWTwH+ywQ2GUo+gRPRHj9lw+Jlm3kZ9gOf1yhCJMHIJW5NnwsGV0xF sl+Q== 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; bh=6hk4zM3kNAj5NMgi0ayc8vw+3/YdS03ZN5V+i3iB+nQ=; b=K9RsbTN03isP+gSUs7TG1Ta86eHnWwNRQJvEC2e09tYZ4qxAZMOwD8agBzcrjAn24Q ED2XJNzM0LyVXNH4jXV+k+VorKfGlZAeAadxkubTw7ApMpkPfNxYy/N/oUMM5KwmnFqj Mf7kXQcZ534cVchwxx/TZbFr9+lDzUIlp7n/Sej308L6wb4YJwxNnynlLn/yDwrcaMtS BYYZTWkmKAT0ceH+eo0hPiB+XoOObu64BDaRSDAMfZV5LDTETde/4sXcChlCvxWevTce JNdhhWG4RaCAdvFQWgEExq03GwrodxeJyrWPepi+uYsbZhuYssvXofPwowdF5gppild+ 35XQ== X-Gm-Message-State: AOAM533FU+AElUPCOm+c+Bu0WLF/01MTsnHQ/KY5NSOvK5T+ucIa9Hq5 9KnS5ahNHdXBPIY7axoEddFDiO0cj3s09CKYlqAzdKKCjOkdsXZgoHkgNMRtNsI7ryMaDx4ohzx 5yvNOFuu1U0qBoLzOTH8hDVcMZi0vv3+pN7rr/+3Y6i+EF9+dildRDWexHnNkepCA6o1+jVqQmd Sk X-Google-Smtp-Source: ABdhPJzZsYf/iPw8x916TF1B0eAtBgZX+DuszZxHfkCTbC+Z0JcH3x5OgW/q3/cNf9xcwmlyUIuHPI20F7fgjxdDxaMm X-Received: from twelve4.c.googlers.com ([fda3:e722:ac3:10:24:72f4:c0a8:437a]) (user=jonathantanmy job=sendgmr) by 2002:ad4:5426:: with SMTP id g6mr962139qvt.47.1623950018342; Thu, 17 Jun 2021 10:13:38 -0700 (PDT) Date: Thu, 17 Jun 2021 10:13:26 -0700 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.32.0.272.g935e593368-goog Subject: [PATCH v4 5/5] promisor-remote: teach lazy-fetch in any repo From: Jonathan Tan To: git@vger.kernel.org Cc: Jonathan Tan , newren@gmail.com, Junio C Hamano Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org This is one step towards supporting partial clone submodules. Even after this patch, we will still lack partial clone submodules support, primarily because a lot of Git code that accesses submodule objects does so by adding their object stores as alternates, meaning that any lazy fetches that would occur in the submodule would be done based on the config of the superproject, not of the submodule. This also prevents testing of the functionality in this patch by user-facing commands. So for now, test this mechanism using a test helper. Besides that, there is some code that uses the wrapper functions like has_promisor_remote(). Those will need to be checked to see if they could support the non-wrapper functions instead (and thus support any repository, not just the_repository). Signed-off-by: Jonathan Tan Signed-off-by: Junio C Hamano --- Makefile | 1 + object-file.c | 7 ++---- promisor-remote.c | 9 ++++---- t/helper/test-partial-clone.c | 43 +++++++++++++++++++++++++++++++++++ t/helper/test-tool.c | 1 + t/helper/test-tool.h | 1 + t/t0410-partial-clone.sh | 23 +++++++++++++++++++ 7 files changed, 76 insertions(+), 9 deletions(-) create mode 100644 t/helper/test-partial-clone.c diff --git a/Makefile b/Makefile index c3565fc0f8..f6653bcd5e 100644 --- a/Makefile +++ b/Makefile @@ -725,6 +725,7 @@ TEST_BUILTINS_OBJS += test-oidmap.o TEST_BUILTINS_OBJS += test-online-cpus.o TEST_BUILTINS_OBJS += test-parse-options.o TEST_BUILTINS_OBJS += test-parse-pathspec-file.o +TEST_BUILTINS_OBJS += test-partial-clone.o TEST_BUILTINS_OBJS += test-path-utils.o TEST_BUILTINS_OBJS += test-pcre2-config.o TEST_BUILTINS_OBJS += test-pkt-line.o diff --git a/object-file.c b/object-file.c index f233b440b2..ebf273e9e7 100644 --- a/object-file.c +++ b/object-file.c @@ -1570,15 +1570,12 @@ static int do_oid_object_info_extended(struct repository *r, } /* Check if it is a missing object */ - if (fetch_if_missing && has_promisor_remote() && - !already_retried && r == the_repository && + if (fetch_if_missing && repo_has_promisor_remote(r) && + !already_retried && !(flags & OBJECT_INFO_SKIP_FETCH_OBJECT)) { /* * TODO Investigate checking promisor_remote_get_direct() * TODO return value and stopping on error here. - * TODO Pass a repository struct through - * promisor_remote_get_direct(), such that arbitrary - * repositories work. */ promisor_remote_get_direct(r, real, 1); already_retried = 1; diff --git a/promisor-remote.c b/promisor-remote.c index 1e00e16b0f..c088dcbff3 100644 --- a/promisor-remote.c +++ b/promisor-remote.c @@ -10,7 +10,8 @@ struct promisor_remote_config { struct promisor_remote **promisors_tail; }; -static int fetch_objects(const char *remote_name, +static int fetch_objects(struct repository *repo, + const char *remote_name, const struct object_id *oids, int oid_nr) { @@ -20,6 +21,8 @@ static int fetch_objects(const char *remote_name, child.git_cmd = 1; child.in = -1; + if (repo != the_repository) + prepare_other_repo_env(&child.env_array, repo->gitdir); strvec_pushl(&child.args, "-c", "fetch.negotiationAlgorithm=noop", "fetch", remote_name, "--no-tags", "--no-write-fetch-head", "--recurse-submodules=no", @@ -240,10 +243,8 @@ int promisor_remote_get_direct(struct repository *repo, promisor_remote_init(repo); - if (repo != the_repository) - BUG("only the_repository is supported for now"); for (r = repo->promisor_remote_config->promisors; r; r = r->next) { - if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) { + if (fetch_objects(repo, r->name, remaining_oids, remaining_nr) < 0) { if (remaining_nr == 1) continue; remaining_nr = remove_fetched_oids(repo, &remaining_oids, diff --git a/t/helper/test-partial-clone.c b/t/helper/test-partial-clone.c new file mode 100644 index 0000000000..3f102cfddd --- /dev/null +++ b/t/helper/test-partial-clone.c @@ -0,0 +1,43 @@ +#include "cache.h" +#include "test-tool.h" +#include "repository.h" +#include "object-store.h" + +/* + * Prints the size of the object corresponding to the given hash in a specific + * gitdir. This is similar to "git -C gitdir cat-file -s", except that this + * exercises the code that accesses the object of an arbitrary repository that + * is not the_repository. ("git -C gitdir" makes it so that the_repository is + * the one in gitdir.) + */ +static void object_info(const char *gitdir, const char *oid_hex) +{ + struct repository r; + struct object_id oid; + unsigned long size; + struct object_info oi = {.sizep = &size}; + const char *p; + + if (repo_init(&r, gitdir, NULL)) + die("could not init repo"); + if (parse_oid_hex(oid_hex, &oid, &p)) + die("could not parse oid"); + if (oid_object_info_extended(&r, &oid, &oi, 0)) + die("could not obtain object info"); + printf("%d\n", (int) size); +} + +int cmd__partial_clone(int argc, const char **argv) +{ + setup_git_directory(); + + if (argc < 4) + die("too few arguments"); + + if (!strcmp(argv[1], "object-info")) + object_info(argv[2], argv[3]); + else + die("invalid argument '%s'", argv[1]); + + return 0; +} diff --git a/t/helper/test-tool.c b/t/helper/test-tool.c index c5bd0c6d4c..b21e8f1519 100644 --- a/t/helper/test-tool.c +++ b/t/helper/test-tool.c @@ -46,6 +46,7 @@ static struct test_cmd cmds[] = { { "online-cpus", cmd__online_cpus }, { "parse-options", cmd__parse_options }, { "parse-pathspec-file", cmd__parse_pathspec_file }, + { "partial-clone", cmd__partial_clone }, { "path-utils", cmd__path_utils }, { "pcre2-config", cmd__pcre2_config }, { "pkt-line", cmd__pkt_line }, diff --git a/t/helper/test-tool.h b/t/helper/test-tool.h index e8069a3b22..f845ced4b3 100644 --- a/t/helper/test-tool.h +++ b/t/helper/test-tool.h @@ -35,6 +35,7 @@ int cmd__oidmap(int argc, const char **argv); int cmd__online_cpus(int argc, const char **argv); int cmd__parse_options(int argc, const char **argv); int cmd__parse_pathspec_file(int argc, const char** argv); +int cmd__partial_clone(int argc, const char **argv); int cmd__path_utils(int argc, const char **argv); int cmd__pcre2_config(int argc, const char **argv); int cmd__pkt_line(int argc, const char **argv); diff --git a/t/t0410-partial-clone.sh b/t/t0410-partial-clone.sh index 584a039b85..a211a66c67 100755 --- a/t/t0410-partial-clone.sh +++ b/t/t0410-partial-clone.sh @@ -604,6 +604,29 @@ test_expect_success 'do not fetch when checking existence of tree we construct o git -C repo cherry-pick side1 ' +test_expect_success 'lazy-fetch when accessing object not in the_repository' ' + rm -rf full partial.git && + test_create_repo full && + test_commit -C full create-a-file file.txt && + + test_config -C full uploadpack.allowfilter 1 && + test_config -C full uploadpack.allowanysha1inwant 1 && + git clone --filter=blob:none --bare "file://$(pwd)/full" partial.git && + FILE_HASH=$(git -C full rev-parse HEAD:file.txt) && + + # Sanity check that the file is missing + git -C partial.git rev-list --objects --missing=print HEAD >out && + grep "[?]$FILE_HASH" out && + + git -C full cat-file -s "$FILE_HASH" >expect && + test-tool partial-clone object-info partial.git "$FILE_HASH" >actual && + test_cmp expect actual && + + # Sanity check that the file is now present + git -C partial.git rev-list --objects --missing=print HEAD >out && + ! grep "[?]$FILE_HASH" out +' + . "$TEST_DIRECTORY"/lib-httpd.sh start_httpd