From: "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: gitster@pobox.com, me@ttaylorr.com, newren@gmail.com,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Teng Long" <dyroneteng@gmail.com>,
"Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
"Derrick Stolee" <derrickstolee@github.com>,
"Derrick Stolee" <derrickstolee@github.com>
Subject: [PATCH 03/24] bundle-uri: create basic file-copy logic
Date: Fri, 20 May 2022 18:40:21 +0000 [thread overview]
Message-ID: <cb270ece66d2ef7435a8f0987008935d51fb9b3a.1653072042.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1234.git.1653072042.gitgitgadget@gmail.com>
From: Derrick Stolee <derrickstolee@github.com>
Before implementing a way to fetch bundles into a repository, create the
basic logic. Assume that the URI is actually a file path. Future logic
will make this more careful to other protocols.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
---
Makefile | 1 +
bundle-uri.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++
bundle-uri.h | 14 ++++++++
3 files changed, 107 insertions(+)
create mode 100644 bundle-uri.c
create mode 100644 bundle-uri.h
diff --git a/Makefile b/Makefile
index f8bccfab5e9..8f27310836d 100644
--- a/Makefile
+++ b/Makefile
@@ -887,6 +887,7 @@ LIB_OBJS += blob.o
LIB_OBJS += bloom.o
LIB_OBJS += branch.o
LIB_OBJS += bulk-checkin.o
+LIB_OBJS += bundle-uri.o
LIB_OBJS += bundle.o
LIB_OBJS += cache-tree.o
LIB_OBJS += cbtree.o
diff --git a/bundle-uri.c b/bundle-uri.c
new file mode 100644
index 00000000000..91aba061833
--- /dev/null
+++ b/bundle-uri.c
@@ -0,0 +1,92 @@
+#include "cache.h"
+#include "bundle-uri.h"
+#include "bundle.h"
+#include "object-store.h"
+#include "refs.h"
+#include "run-command.h"
+
+static void find_temp_filename(struct strbuf *name)
+{
+ int fd;
+ /*
+ * Find a temporray filename that is available. This is briefly
+ * racy, but unlikely to collide.
+ */
+ fd = odb_mkstemp(name, "bundles/tmp_uri_XXXXXX");
+ if (fd < 0)
+ die(_("failed to create temporary file"));
+ close(fd);
+ unlink(name->buf);
+}
+
+static int copy_uri_to_file(const char *uri, const char *file)
+{
+ /* Copy as a file */
+ return copy_file(uri, file, 0444);
+}
+
+static int unbundle_from_file(struct repository *r, const char *file)
+{
+ int result = 0;
+ int bundle_fd;
+ struct bundle_header header = BUNDLE_HEADER_INIT;
+ struct strvec extra_index_pack_args = STRVEC_INIT;
+ struct string_list_item *refname;
+ struct strbuf bundle_ref = STRBUF_INIT;
+ size_t bundle_prefix_len;
+
+ if ((bundle_fd = read_bundle_header(file, &header)) < 0)
+ return 1;
+
+ result = unbundle(r, &header, bundle_fd, &extra_index_pack_args);
+
+ /*
+ * Convert all refs/heads/ from the bundle into refs/bundles/
+ * in the local repository.
+ */
+ strbuf_addstr(&bundle_ref, "refs/bundles/");
+ bundle_prefix_len = bundle_ref.len;
+
+ for_each_string_list_item(refname, &header.references) {
+ struct object_id *oid = refname->util;
+ struct object_id old_oid;
+ const char *branch_name;
+ int has_old;
+
+ if (!skip_prefix(refname->string, "refs/heads/", &branch_name))
+ continue;
+
+ strbuf_setlen(&bundle_ref, bundle_prefix_len);
+ strbuf_addstr(&bundle_ref, branch_name);
+
+ has_old = !read_ref(bundle_ref.buf, &old_oid);
+ update_ref("fetched bundle", bundle_ref.buf, oid,
+ has_old ? &old_oid : NULL,
+ REF_SKIP_OID_VERIFICATION,
+ UPDATE_REFS_MSG_ON_ERR);
+ }
+
+ bundle_header_release(&header);
+ return result;
+}
+
+int fetch_bundle_uri(struct repository *r, const char *uri)
+{
+ int result = 0;
+ struct strbuf filename = STRBUF_INIT;
+
+ find_temp_filename(&filename);
+ if ((result = copy_uri_to_file(uri, filename.buf)))
+ goto cleanup;
+
+ if ((result = !is_bundle(filename.buf, 0)))
+ goto cleanup;
+
+ if ((result = unbundle_from_file(r, filename.buf)))
+ goto cleanup;
+
+cleanup:
+ unlink(filename.buf);
+ strbuf_release(&filename);
+ return result;
+}
\ No newline at end of file
diff --git a/bundle-uri.h b/bundle-uri.h
new file mode 100644
index 00000000000..8a152f1ef14
--- /dev/null
+++ b/bundle-uri.h
@@ -0,0 +1,14 @@
+#ifndef BUNDLE_URI_H
+#define BUNDLE_URI_H
+
+struct repository;
+
+/**
+ * Fetch data from the given 'uri' and unbundle the bundle data found
+ * based on that information.
+ *
+ * Returns non-zero if no bundle information is found at the given 'uri'.
+ */
+int fetch_bundle_uri(struct repository *r, const char *uri);
+
+#endif
--
gitgitgadget
next prev parent reply other threads:[~2022-05-20 18:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-20 18:40 [PATCH 00/24] [RFC] Bundle URIs Combined RFC Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 01/24] docs: document bundle URI standard Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 02/24] remote-curl: add 'get' capability Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` Derrick Stolee via GitGitGadget [this message]
2022-05-20 18:40 ` [PATCH 04/24] bundle-uri: add support for http(s):// and file:// Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 05/24] fetch: add --bundle-uri option Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 06/24] fetch: add 'refs/bundle/' to log.excludeDecoration Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 07/24] clone: add --bundle-uri option Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 08/24] clone: --bundle-uri cannot be combined with --depth Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 09/24] bundle-uri: create bundle_list struct and helpers Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 10/24] bundle-uri: create base key-value pair parsing Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 11/24] bundle-uri: create "key=value" line parsing Ævar Arnfjörð Bjarmason via GitGitGadget
2022-05-20 18:40 ` [PATCH 12/24] bundle-uri: unit test "key=value" parsing Ævar Arnfjörð Bjarmason via GitGitGadget
2022-05-20 18:40 ` [PATCH 13/24] bundle-uri: limit recursion depth for bundle lists Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 14/24] bundle-uri: parse bundle list in config format Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 15/24] bundle-uri: fetch a list of bundles Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 16/24] protocol v2: add server-side "bundle-uri" skeleton Ævar Arnfjörð Bjarmason via GitGitGadget
2022-05-20 18:40 ` [PATCH 17/24] bundle-uri client: add minimal NOOP client Ævar Arnfjörð Bjarmason via GitGitGadget
2022-05-20 18:40 ` [PATCH 18/24] bundle-uri client: add "git ls-remote-bundle-uri" Ævar Arnfjörð Bjarmason via GitGitGadget
2022-05-20 18:40 ` [PATCH 19/24] bundle-uri: serve URI advertisement from bundle.* config Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 20/24] bundle-uri client: add boolean transfer.bundleURI setting Ævar Arnfjörð Bjarmason via GitGitGadget
2022-05-20 18:40 ` [PATCH 21/24] bundle-uri: allow relative URLs in bundle lists Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 22/24] bundle-uri: download bundles from an advertised list Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 23/24] clone: unbundle the advertised bundles Derrick Stolee via GitGitGadget
2022-05-20 18:40 ` [PATCH 24/24] t5601: basic bundle URI tests Derrick Stolee via GitGitGadget
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