From patchwork Tue Feb 23 20:14:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Derrick Stolee X-Patchwork-Id: 12100845 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=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 35BBAC433DB for ; Tue, 23 Feb 2021 20:16:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A68C64E5C for ; Tue, 23 Feb 2021 20:16:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233330AbhBWUP6 (ORCPT ); Tue, 23 Feb 2021 15:15:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234208AbhBWUPg (ORCPT ); Tue, 23 Feb 2021 15:15:36 -0500 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23C26C06121E for ; Tue, 23 Feb 2021 12:14:42 -0800 (PST) Received: by mail-wr1-x42b.google.com with SMTP id v1so23848785wrd.6 for ; Tue, 23 Feb 2021 12:14:42 -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=sD4Fupn5+RGoFrzGqEpq4EQJjpx+9EBO2UT98kQj/hw=; b=eMyFuaJc5ZSsVICBxE5eAiU/4fjOdNXKhUKDeWjcU8ki5ESPsD+yLPOx7/EgOlBAX6 j1yQpKvRUfiqDHRpJ+A6jnyxeSZy9za9HM/T/qBQcA1LIo1qWx4So+YLYy60QSCTk9Bm Yw5OaMnTZJ/a+cXu2FXUzm0pa2nuFlc4ciVu6eTAI90/bvH2cUpEzZG8NgMkimQhuHgq EPz839DZdT++CVD5IdfIAjaO0S8JA4Fb+dPkrcRTBegRcVGTMW3MULt5aY3C3kzUKVHS aa7m5ZMWtkx/Gt7ne0j6k9VwSlkG0mPFP/5cBgk522Wy6vq5Z/mGJchRgvrOJZT4uUwc HhBw== 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=sD4Fupn5+RGoFrzGqEpq4EQJjpx+9EBO2UT98kQj/hw=; b=I9AvvhSo0xPhZa6p2fdG4/KRLi+IAXFwn5hhb1Vaacx3xT1IJ2BpJpy13lQx6eii1p 6qDmInD74Gi8vgh1uuDmYtQ/hMg6ntLrW2oLZ83TtZ14HXt5QJQ4HZA7pXUUhTNbChGj qraxXLxet/pB9OEZpvddFlkK3Jm7w4q007nLgGANFMofmEbha741S9wJSGTvgK5/Frw3 Z5DwR6BfYH3pZvaciupLVa8Ux6cMhNW0Xas0m36qNabaoOKbxsAubGs3KXdLFaZQ9QCY 64pAfxoOrsKEQXUOPu8ZeHzi21dw3Wp5ItTnbx+2FF+6E4LM4iTulRE6fR5HlzAxocOj 8srQ== X-Gm-Message-State: AOAM5310DEChUQ1OC8Ni3Lejo6Oz1AoQbZvGX9rlNEfxAH2AbEGR2s3G gdzPJNqJ3IIoKu8prRDCCe3tC+A5L2M= X-Google-Smtp-Source: ABdhPJznk6xKVStrSoLiOJUVjhzWDDV6vy8EHT1SXS1wb0NaB8KKT4K8iEV8PamPIbMg3fntemhcmQ== X-Received: by 2002:a05:6000:152:: with SMTP id r18mr27442697wrx.226.1614111280920; Tue, 23 Feb 2021 12:14:40 -0800 (PST) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id o10sm26636326wrx.5.2021.02.23.12.14.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Feb 2021 12:14:40 -0800 (PST) Message-Id: <6d6b230e3318007150aebefebc16dfb8b9b6c401.1614111270.git.gitgitgadget@gmail.com> In-Reply-To: References: Date: Tue, 23 Feb 2021 20:14:25 +0000 Subject: [PATCH 16/20] sparse-checkout: toggle sparse index from builtin Fcc: Sent MIME-Version: 1.0 To: git@vger.kernel.org Cc: newren@gmail.com, gitster@pobox.com, pclouds@gmail.com, jrnieder@gmail.com, Derrick Stolee , Derrick Stolee Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Derrick Stolee From: Derrick Stolee The sparse index extension is used to signal that index writes should be in sparse mode. This was only updated using GIT_TEST_SPARSE_INDEX=1. Add a '--[no-]sparse-index' option to 'git sparse-checkout init' that specifies if the sparse index should be used. It also updates the index to use the correct format, either way. Add a warning in the documentation that the use of a repository extension might reduce compatibility with third-party tools. 'git sparse-checkout init' already sets extension.worktreeConfig, which places most sparse-checkout users outside of the scope of most third-party tools. Update t1092-sparse-checkout-compatibility.sh to use this CLI instead of GIT_TEST_SPARSE_INDEX=1. Signed-off-by: Derrick Stolee --- Documentation/git-sparse-checkout.txt | 14 +++++++++ builtin/sparse-checkout.c | 17 ++++++++++- sparse-index.c | 37 +++++++++++++++-------- sparse-index.h | 3 ++ t/t1092-sparse-checkout-compatibility.sh | 38 +++++++++++------------- 5 files changed, 76 insertions(+), 33 deletions(-) diff --git a/Documentation/git-sparse-checkout.txt b/Documentation/git-sparse-checkout.txt index a0eeaeb02ee3..b51b8450cfd9 100644 --- a/Documentation/git-sparse-checkout.txt +++ b/Documentation/git-sparse-checkout.txt @@ -45,6 +45,20 @@ To avoid interfering with other worktrees, it first enables the When `--cone` is provided, the `core.sparseCheckoutCone` setting is also set, allowing for better performance with a limited set of patterns (see 'CONE PATTERN SET' below). ++ +Use the `--[no-]sparse-index` option to toggle the use of the sparse +index format. This reduces the size of the index to be more closely +aligned with your sparse-checkout definition. This can have significant +performance advantages for commands such as `git status` or `git add`. +This feature is still experimental. Some commands might be slower with +a sparse index until they are properly integrated with the feature. ++ +**WARNING:** Using a sparse index requires modifying the index in a way +that is not completely understood by other tools. Enabling sparse index +enables the `extensions.spareseIndex` config value, which might cause +other tools to stop working with your repository. If you have trouble with +this compatibility, then run `git sparse-checkout sparse-index disable` to +remove this config and rewrite your index to not be sparse. 'set':: Write a set of patterns to the sparse-checkout file, as given as diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c index e00b82af727b..ca63e2c64e95 100644 --- a/builtin/sparse-checkout.c +++ b/builtin/sparse-checkout.c @@ -14,6 +14,7 @@ #include "unpack-trees.h" #include "wt-status.h" #include "quote.h" +#include "sparse-index.h" static const char *empty_base = ""; @@ -283,12 +284,13 @@ static int set_config(enum sparse_checkout_mode mode) } static char const * const builtin_sparse_checkout_init_usage[] = { - N_("git sparse-checkout init [--cone]"), + N_("git sparse-checkout init [--cone] [--[no-]sparse-index]"), NULL }; static struct sparse_checkout_init_opts { int cone_mode; + int sparse_index; } init_opts; static int sparse_checkout_init(int argc, const char **argv) @@ -303,11 +305,15 @@ static int sparse_checkout_init(int argc, const char **argv) static struct option builtin_sparse_checkout_init_options[] = { OPT_BOOL(0, "cone", &init_opts.cone_mode, N_("initialize the sparse-checkout in cone mode")), + OPT_BOOL(0, "sparse-index", &init_opts.sparse_index, + N_("toggle the use of a sparse index")), OPT_END(), }; repo_read_index(the_repository); + init_opts.sparse_index = -1; + argc = parse_options(argc, argv, NULL, builtin_sparse_checkout_init_options, builtin_sparse_checkout_init_usage, 0); @@ -326,6 +332,15 @@ static int sparse_checkout_init(int argc, const char **argv) sparse_filename = get_sparse_checkout_filename(); res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL); + if (init_opts.sparse_index >= 0) { + if (set_sparse_index_config(the_repository, init_opts.sparse_index) < 0) + die(_("failed to modify sparse-index config")); + + /* force an index rewrite */ + repo_read_index(the_repository); + the_repository->index->updated_workdir = 1; + } + /* If we already have a sparse-checkout file, use it. */ if (res >= 0) { free(sparse_filename); diff --git a/sparse-index.c b/sparse-index.c index 97b0d0c57857..a991c5331e9e 100644 --- a/sparse-index.c +++ b/sparse-index.c @@ -104,23 +104,37 @@ static int convert_to_sparse_rec(struct index_state *istate, static int enable_sparse_index(struct repository *repo) { - const char *config_path = repo_git_path(repo, "config.worktree"); + int res; if (upgrade_repository_format(1) < 0) { warning(_("unable to upgrade repository format to enable sparse-index")); return -1; } - git_config_set_in_file_gently(config_path, - "extensions.sparseIndex", - "true"); + res = git_config_set_gently("extensions.sparseindex", "true"); prepare_repo_settings(repo); repo->settings.sparse_index = 1; - return 0; + return res; +} + +int set_sparse_index_config(struct repository *repo, int enable) +{ + int res; + + if (enable) + return enable_sparse_index(repo); + + /* Don't downgrade repository format, just remove the extension. */ + res = git_config_set_gently("extensions.sparseindex", NULL); + + prepare_repo_settings(repo); + repo->settings.sparse_index = 0; + return res; } int convert_to_sparse(struct index_state *istate) { + int test_env; if (istate->split_index || istate->sparse_index || !core_apply_sparse_checkout || !core_sparse_checkout_cone) return 0; @@ -129,14 +143,13 @@ int convert_to_sparse(struct index_state *istate) istate->repo = the_repository; /* - * The GIT_TEST_SPARSE_INDEX environment variable triggers the - * extensions.sparseIndex config variable to be on. + * If GIT_TEST_SPARSE_INDEX=1, then trigger extensions.sparseIndex + * to be fully enabled. If GIT_TEST_SPARSE_INDEX=0 (set explicitly), + * then purposefully disable the setting. */ - if (git_env_bool("GIT_TEST_SPARSE_INDEX", 0)) { - int err = enable_sparse_index(istate->repo); - if (err < 0) - return err; - } + test_env = git_env_bool("GIT_TEST_SPARSE_INDEX", -1); + if (test_env >= 0) + set_sparse_index_config(istate->repo, test_env); /* * Only convert to sparse if extensions.sparseIndex is set. diff --git a/sparse-index.h b/sparse-index.h index 64380e121d80..39dcc859735e 100644 --- a/sparse-index.h +++ b/sparse-index.h @@ -5,4 +5,7 @@ struct index_state; void ensure_full_index(struct index_state *istate); int convert_to_sparse(struct index_state *istate); +struct repository; +int set_sparse_index_config(struct repository *repo, int enable); + #endif diff --git a/t/t1092-sparse-checkout-compatibility.sh b/t/t1092-sparse-checkout-compatibility.sh index bfc9e28ef0e1..9c2bc4d25f66 100755 --- a/t/t1092-sparse-checkout-compatibility.sh +++ b/t/t1092-sparse-checkout-compatibility.sh @@ -4,6 +4,7 @@ test_description='compare full workdir to sparse workdir' GIT_TEST_CHECK_CACHE_TREE=0 GIT_TEST_SPLIT_INDEX=0 +GIT_TEST_SPARSE_INDEX= . ./test-lib.sh @@ -98,25 +99,26 @@ init_repos () { # initialize sparse-checkout definitions git -C sparse-checkout sparse-checkout init --cone && git -C sparse-checkout sparse-checkout set deep && - GIT_TEST_SPARSE_INDEX=1 git -C sparse-index sparse-checkout init --cone && - GIT_TEST_SPARSE_INDEX=1 git -C sparse-index sparse-checkout set deep + git -C sparse-index sparse-checkout init --cone --sparse-index && + test_cmp_config -C sparse-index true extensions.sparseindex && + git -C sparse-index sparse-checkout set deep } run_on_sparse () { ( cd sparse-checkout && - GIT_TEST_SPARSE_INDEX=0 "$@" >../sparse-checkout-out 2>../sparse-checkout-err + "$@" >../sparse-checkout-out 2>../sparse-checkout-err ) && ( cd sparse-index && - GIT_TEST_SPARSE_INDEX=1 "$@" >../sparse-index-out 2>../sparse-index-err + "$@" >../sparse-index-out 2>../sparse-index-err ) } run_on_all () { ( cd full-checkout && - GIT_TEST_SPARSE_INDEX=0 "$@" >../full-checkout-out 2>../full-checkout-err + "$@" >../full-checkout-out 2>../full-checkout-err ) && run_on_sparse "$@" } @@ -146,7 +148,7 @@ test_expect_success 'sparse-index contents' ' || return 1 done && - GIT_TEST_SPARSE_INDEX=1 git -C sparse-index sparse-checkout set folder1 && + git -C sparse-index sparse-checkout set folder1 && test-tool -C sparse-index read-cache --table >cache && for dir in deep folder2 x @@ -156,7 +158,7 @@ test_expect_success 'sparse-index contents' ' || return 1 done && - GIT_TEST_SPARSE_INDEX=1 git -C sparse-index sparse-checkout set deep/deeper1 && + git -C sparse-index sparse-checkout set deep/deeper1 && test-tool -C sparse-index read-cache --table >cache && for dir in deep/deeper2 folder1 folder2 x @@ -394,19 +396,15 @@ test_expect_success 'submodule handling' ' test_expect_success 'sparse-index is expanded and converted back' ' init_repos && - ( - GIT_TEST_SPARSE_INDEX=1 && - export GIT_TEST_SPARSE_INDEX && - GIT_TRACE2_EVENT="$(pwd)/trace2.txt" GIT_TRACE2_EVENT_NESTING=10 \ - git -C sparse-index -c core.fsmonitor="" reset --hard && - test_region index convert_to_sparse trace2.txt && - test_region index ensure_full_index trace2.txt && - - rm trace2.txt && - GIT_TRACE2_EVENT="$(pwd)/trace2.txt" GIT_TRACE2_EVENT_NESTING=10 \ - git -C sparse-index -c core.fsmonitor="" status -uno && - test_region index ensure_full_index trace2.txt - ) + GIT_TRACE2_EVENT="$(pwd)/trace2.txt" GIT_TRACE2_EVENT_NESTING=10 \ + git -C sparse-index -c core.fsmonitor="" reset --hard && + test_region index convert_to_sparse trace2.txt && + test_region index ensure_full_index trace2.txt && + + rm trace2.txt && + GIT_TRACE2_EVENT="$(pwd)/trace2.txt" GIT_TRACE2_EVENT_NESTING=10 \ + git -C sparse-index -c core.fsmonitor="" status -uno && + test_region index ensure_full_index trace2.txt ' test_done