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[144.34.163.219]) by smtp.gmail.com with ESMTPSA id y15sm70303pju.13.2021.01.05.08.30.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Jan 2021 08:30:58 -0800 (PST) From: Jiang Xin To: Junio C Hamano , Git List Cc: Jiang Xin Subject: [PATCH v2 2/2] bundle: arguments can be read from stdin Date: Tue, 5 Jan 2021 11:30:54 -0500 Message-Id: <20210105163054.25358-2-worldhello.net@gmail.com> X-Mailer: git-send-email 2.26.0.rc0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Jiang Xin In order to create an incremental bundle, we need to pass many arguments to let git-bundle ignore some already packed commits. It will be more convenient to pass args via stdin. But the current implementation does not allow us to do this. This is because args are parsed twice when creating bundle. The first time for parsing args is in `compute_and_write_prerequisites()` by running `git-rev-list` command to write prerequisites in bundle file, and stdin is consumed in this step if "--stdin" option is provided for `git-bundle`. Later nothing can be read from stdin when running `setup_revisions()` in `create_bundle()`. Remove the entire `compute_and_write_prerequisites()` function, and parse the args once by `setup_revisions()`. The first step for creating a bundle is to write prerequisites ("-" obj-id SP comment LF), but after calling `prepare_revision_walk()`, the `revs.pending` is left empty. Following steps could not work properly without data in `revs.pending`. Therefore, before calling `prepare_revision_walk()` function, make a copy `revs_copy` from `revs` for later use. Even though `revs_copy` and `revs` share the same objects, but changes on these objects will not change the behavior of function `write_bundle_refs()` and `write_pack_data()`. Also add testcases for git bundle in t6020, which read args from stdin. Signed-off-by: Jiang Xin --- bundle.c | 109 ++++++++++++++++++++++------------------ t/t5607-clone-bundle.sh | 4 +- t/t6020-bundle-misc.sh | 85 +++++++++++++++++++++++++++++-- 3 files changed, 142 insertions(+), 56 deletions(-) diff --git a/bundle.c b/bundle.c index cb0e5931ac..693d619551 100644 --- a/bundle.c +++ b/bundle.c @@ -338,48 +338,6 @@ static int write_pack_data(int bundle_fd, struct rev_info *revs, struct strvec * return 0; } -static int compute_and_write_prerequisites(int bundle_fd, - struct rev_info *revs, - int argc, const char **argv) -{ - struct child_process rls = CHILD_PROCESS_INIT; - struct strbuf buf = STRBUF_INIT; - FILE *rls_fout; - int i; - - strvec_pushl(&rls.args, - "rev-list", "--boundary", "--pretty=oneline", - NULL); - for (i = 1; i < argc; i++) - strvec_push(&rls.args, argv[i]); - rls.out = -1; - rls.git_cmd = 1; - if (start_command(&rls)) - return -1; - rls_fout = xfdopen(rls.out, "r"); - while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) { - struct object_id oid; - if (buf.len > 0 && buf.buf[0] == '-') { - write_or_die(bundle_fd, buf.buf, buf.len); - if (!get_oid_hex(buf.buf + 1, &oid)) { - struct object *object = parse_object_or_die(&oid, - buf.buf); - object->flags |= UNINTERESTING; - add_pending_object(revs, object, buf.buf); - } - } else if (!get_oid_hex(buf.buf, &oid)) { - struct object *object = parse_object_or_die(&oid, - buf.buf); - object->flags |= SHOWN; - } - } - strbuf_release(&buf); - fclose(rls_fout); - if (finish_command(&rls)) - return error(_("rev-list died")); - return 0; -} - /* * Write out bundle refs based on the tips already * parsed into revs.pending. As a side effect, may @@ -474,6 +432,38 @@ static int write_bundle_refs(int bundle_fd, struct rev_info *revs) return ref_count; } +struct bundle_prerequisites_info { + struct object_array *pending; + int fd; +}; + +static void write_bundle_prerequisites(struct commit *commit, void *data) +{ + struct bundle_prerequisites_info *bpi = data; + struct object *object; + struct pretty_print_context ctx = { 0 }; + struct strbuf buf = STRBUF_INIT; + + if (!(commit->object.flags & BOUNDARY)) + return; + strbuf_addf(&buf, "-%s ", oid_to_hex(&commit->object.oid)); + write_or_die(bpi->fd, buf.buf, buf.len); + + ctx.fmt = CMIT_FMT_ONELINE; + ctx.output_encoding = get_log_output_encoding(); + strbuf_reset(&buf); + pretty_print_commit(&ctx, commit, &buf); + strbuf_trim(&buf); + + object = (struct object *)commit; + object->flags |= UNINTERESTING; + add_object_array_with_path(object, buf.buf, bpi->pending, S_IFINVALID, + NULL); + strbuf_addch(&buf, '\n'); + write_or_die(bpi->fd, buf.buf, buf.len); + strbuf_release(&buf); +} + int create_bundle(struct repository *r, const char *path, int argc, const char **argv, struct strvec *pack_options, int version) { @@ -481,8 +471,10 @@ int create_bundle(struct repository *r, const char *path, int bundle_fd = -1; int bundle_to_stdout; int ref_count = 0; - struct rev_info revs; + struct rev_info revs, revs_copy; int min_version = the_hash_algo == &hash_algos[GIT_HASH_SHA1] ? 2 : 3; + struct bundle_prerequisites_info bpi; + int i; bundle_to_stdout = !strcmp(path, "-"); if (bundle_to_stdout) @@ -512,10 +504,6 @@ int create_bundle(struct repository *r, const char *path, save_commit_buffer = 0; repo_init_revisions(r, &revs, NULL); - /* write prerequisites */ - if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv)) - goto err; - argc = setup_revisions(argc, argv, &revs, NULL); if (argc > 1) { @@ -523,16 +511,37 @@ int create_bundle(struct repository *r, const char *path, goto err; } - object_array_remove_duplicates(&revs.pending); + /* save revs.pending in revs_copy for later use */ + memcpy(&revs_copy, &revs, sizeof(revs)); + revs_copy.pending.nr = 0; + revs_copy.pending.alloc = 0; + revs_copy.pending.objects = NULL; + for (i = 0; i < revs.pending.nr; i++) { + struct object_array_entry *e = revs.pending.objects + i; + if (e) + add_object_array_with_path(e->item, e->name, + &revs_copy.pending, + e->mode, e->path); + } - ref_count = write_bundle_refs(bundle_fd, &revs); + /* write prerequisites */ + revs.boundary = 1; + if (prepare_revision_walk(&revs)) + die("revision walk setup failed"); + bpi.fd = bundle_fd; + bpi.pending = &revs_copy.pending; + traverse_commit_list(&revs, write_bundle_prerequisites, NULL, &bpi); + object_array_remove_duplicates(&revs_copy.pending); + + /* write bundle refs */ + ref_count = write_bundle_refs(bundle_fd, &revs_copy); if (!ref_count) die(_("Refusing to create empty bundle.")); else if (ref_count < 0) goto err; /* write pack */ - if (write_pack_data(bundle_fd, &revs, pack_options)) + if (write_pack_data(bundle_fd, &revs_copy, pack_options)) goto err; if (!bundle_to_stdout) { diff --git a/t/t5607-clone-bundle.sh b/t/t5607-clone-bundle.sh index 26985f4b44..425258767d 100755 --- a/t/t5607-clone-bundle.sh +++ b/t/t5607-clone-bundle.sh @@ -38,13 +38,13 @@ test_expect_success 'die if bundle file cannot be created' ' test_must_fail git bundle create adir --all ' -test_expect_failure 'bundle --stdin' ' +test_expect_success 'bundle --stdin' ' echo master | git bundle create stdin-bundle.bdl --stdin && git ls-remote stdin-bundle.bdl >output && grep master output ' -test_expect_failure 'bundle --stdin ' ' +test_expect_success 'bundle --stdin ' ' echo master | git bundle create hybrid-bundle.bdl --stdin tag && git ls-remote hybrid-bundle.bdl >output && grep master output diff --git a/t/t6020-bundle-misc.sh b/t/t6020-bundle-misc.sh index c6613a4162..780a66dcc5 100755 --- a/t/t6020-bundle-misc.sh +++ b/t/t6020-bundle-misc.sh @@ -252,6 +252,13 @@ test_expect_success 'create bundle 1 - no prerequisites' ' # create bundle from args git bundle create 1.bdl topic/1 topic/2 && + # create bundle from stdin + cat >input <<-EOF && + topic/1 + topic/2 + EOF + git bundle create stdin-1.bdl --stdin expect <<-EOF && The bundle contains these 2 refs: refs/heads/topic/1 @@ -264,9 +271,17 @@ test_expect_success 'create bundle 1 - no prerequisites' ' make_user_friendly_and_stable_output >actual && test_i18ncmp expect actual && + git bundle verify stdin-1.bdl | + make_user_friendly_and_stable_output >actual && + test_i18ncmp expect actual && + convert_bundle_to_pack <1.bdl >1.pack && git index-pack 1.pack && - test_bundle_object_count 1.pack 24 + test_bundle_object_count 1.pack 24 && + + convert_bundle_to_pack stdin-1.pack && + git index-pack stdin-1.pack && + test_bundle_object_count stdin-1.pack 24 ' test_expect_success 'create bundle 2 - has prerequisites' ' @@ -278,6 +293,18 @@ test_expect_success 'create bundle 2 - has prerequisites' ' ^topic/2 \ release && + # create bundle from stdin + # input has a non-exist reference: "topic/deleted" + cat >input <<-EOF && + ^topic/deleted + ^$D + ^topic/2 + EOF + git bundle create stdin-2.bdl \ + --ignore-missing \ + --stdin \ + release expect <<-EOF && The bundle contains this ref: refs/heads/release @@ -291,9 +318,17 @@ test_expect_success 'create bundle 2 - has prerequisites' ' make_user_friendly_and_stable_output >actual && test_i18ncmp expect actual && + git bundle verify stdin-2.bdl | + make_user_friendly_and_stable_output >actual && + test_i18ncmp expect actual && + convert_bundle_to_pack <2.bdl >2.pack && git index-pack 2.pack && - test_bundle_object_count 2.pack 16 + test_bundle_object_count 2.pack 16 && + + convert_bundle_to_pack stdin-2.pack && + git index-pack stdin-2.pack && + test_bundle_object_count stdin-2.pack 16 ' test_expect_success 'fail to verify bundle without prerequisites' ' @@ -308,6 +343,10 @@ test_expect_success 'fail to verify bundle without prerequisites' ' test_must_fail git -C test1.git bundle verify ../2.bdl 2>&1 | make_user_friendly_and_stable_output >actual && + test_i18ncmp expect actual && + + test_must_fail git -C test1.git bundle verify ../stdin-2.bdl 2>&1 | + make_user_friendly_and_stable_output >actual && test_i18ncmp expect actual ' @@ -320,6 +359,16 @@ test_expect_success 'create bundle 3 - two refs, same object' ' main \ HEAD && + # create bundle from stdin + cat >input <<-EOF && + ^release + ^topic/1 + ^topic/2 + EOF + git bundle create --version=3 stdin-3.bdl \ + --stdin \ + main HEAD expect <<-EOF && The bundle contains these 2 refs: refs/heads/main @@ -333,9 +382,17 @@ test_expect_success 'create bundle 3 - two refs, same object' ' make_user_friendly_and_stable_output >actual && test_i18ncmp expect actual && + git bundle verify stdin-3.bdl | + make_user_friendly_and_stable_output >actual && + test_i18ncmp expect actual && + convert_bundle_to_pack <3.bdl >3.pack && git index-pack 3.pack && - test_bundle_object_count 3.pack 4 + test_bundle_object_count 3.pack 4 && + + convert_bundle_to_pack stdin-3.pack && + git index-pack stdin-3.pack && + test_bundle_object_count stdin-3.pack 4 ' test_expect_success 'create bundle 4 - with tags' ' @@ -347,6 +404,18 @@ test_expect_success 'create bundle 4 - with tags' ' ^topic/2 \ --all && + # create bundle from stdin + cat >input <<-EOF && + ^main + ^release + ^topic/1 + ^topic/2 + EOF + git bundle create stdin-4.bdl \ + --ignore-missing \ + --stdin \ + --all expect <<-EOF && The bundle contains these 3 refs: refs/tags/v1 @@ -359,9 +428,17 @@ test_expect_success 'create bundle 4 - with tags' ' make_user_friendly_and_stable_output >actual && test_i18ncmp expect actual && + git bundle verify stdin-4.bdl | + make_user_friendly_and_stable_output >actual && + test_i18ncmp expect actual && + convert_bundle_to_pack <4.bdl >4.pack && git index-pack 4.pack && - test_bundle_object_count 4.pack 3 + test_bundle_object_count 4.pack 3 && + + convert_bundle_to_pack stdin-4.pack && + git index-pack stdin-4.pack && + test_bundle_object_count stdin-4.pack 3 ' test_expect_success 'clone from bundle' ' -- 2.30.0.4.g09ee524cd5