From: "blanet via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: blanet <bupt_xingxin@163.com>, Xing Xin <xingxin.xx@bytedance.com>
Subject: [PATCH] bundle-uri: refresh packed_git if unbundle succeed
Date: Wed, 15 May 2024 03:01:09 +0000 [thread overview]
Message-ID: <pull.1730.git.1715742069966.gitgitgadget@gmail.com> (raw)
From: Xing Xin <xingxin.xx@bytedance.com>
When using the bundle-uri mechanism with a bundle list containing
multiple interrelated bundles, we encountered a bug where tips from
downloaded bundles were not being discovered, resulting in rather slow
clones. This was particularly problematic when employing the heuristic
`creationTokens`.
And this is easy to reproduce. Suppose we have a repository with a
single branch `main` pointing to commit `A`, firstly we create a base
bundle with
git bundle create base.bundle main
Then let's add a new commit `B` on top of `A`, so that an incremental
bundle for `main` can be created with
git bundle create incr.bundle A..main
Now we can generate a bundle list with the following content:
[bundle]
version = 1
mode = all
heuristic = creationToken
[bundle "base"]
uri = base.bundle
creationToken = 1
[bundle "incr"]
uri = incr.bundle
creationToken = 2
A fresh clone with the bundle list above would give the expected
`refs/bundles/main` pointing at `B` in new repository, in other words we
already had everything locally from the bundles, but git would still
download everything from server as if we got nothing.
So why the `refs/bundles/main` is not discovered? After some digging I
found that:
1. when unbundling a downloaded bundle, a `verify_bundle` is called to
check its prerequisites if any. The verify procedure would find oids
so `packed_git` is initialized.
2. after unbundled all bundles, we would enter `do_fetch_pack_v2`,
during which `mark_complete_and_common_ref` and `mark_tips` would
find oids with `OBJECT_INFO_QUICK` flag set, so no new packs would be
enlisted if `packed_git` has already initialized in 1.
Back to the example above, when unbunding `incr.bundle`, `base.pack` is
enlisted to `packed_git` bacause of the prerequisites to verify. Then we
can not find `B` for negotiation at a latter time bacause `B` exists in
`incr.pack` which is not enlisted in `packed_git`.
This commit fixes this by adding a `reprepare_packed_git` call for every
successfully unbundled bundle, which ensures to enlist all generated
packs from bundle uri. And a set of negotiation related tests are added.
Signed-off-by: Xing Xin <xingxin.xx@bytedance.com>
---
bundle-uri: refresh packed_git if unbundle succeed
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1730%2Fblanet%2Fxx%2Fbundle-uri-bug-using-bundle-list-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1730/blanet/xx/bundle-uri-bug-using-bundle-list-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/1730
bundle-uri.c | 3 +
t/t5558-clone-bundle-uri.sh | 129 ++++++++++++++++++++++++++++++++++++
2 files changed, 132 insertions(+)
diff --git a/bundle-uri.c b/bundle-uri.c
index ca32050a78f..2b9d36cfd8e 100644
--- a/bundle-uri.c
+++ b/bundle-uri.c
@@ -7,6 +7,7 @@
#include "refs.h"
#include "run-command.h"
#include "hashmap.h"
+#include "packfile.h"
#include "pkt-line.h"
#include "config.h"
#include "remote.h"
@@ -376,6 +377,8 @@ static int unbundle_from_file(struct repository *r, const char *file)
VERIFY_BUNDLE_QUIET)))
return 1;
+ reprepare_packed_git(r);
+
/*
* Convert all refs/heads/ from the bundle into refs/bundles/
* in the local repository.
diff --git a/t/t5558-clone-bundle-uri.sh b/t/t5558-clone-bundle-uri.sh
index 1ca5f745e73..a5b04d6f187 100755
--- a/t/t5558-clone-bundle-uri.sh
+++ b/t/t5558-clone-bundle-uri.sh
@@ -20,7 +20,10 @@ test_expect_success 'fail to clone from non-bundle file' '
test_expect_success 'create bundle' '
git init clone-from &&
git -C clone-from checkout -b topic &&
+
test_commit -C clone-from A &&
+ git -C clone-from bundle create A.bundle topic &&
+
test_commit -C clone-from B &&
git -C clone-from bundle create B.bundle topic
'
@@ -259,6 +262,132 @@ test_expect_success 'clone bundle list (file, any mode, all failures)' '
! grep "refs/bundles/" refs
'
+#########################################################################
+# Clone negotiation related tests begin here
+
+test_expect_success 'negotiation: bundle with part of wanted commits' '
+ test_when_finished rm -rf trace*.txt &&
+ GIT_TRACE_PACKET="$(pwd)/trace-packet.txt" \
+ git clone --no-local --bundle-uri="clone-from/A.bundle" \
+ clone-from nego-bundle-part &&
+ git -C nego-bundle-part for-each-ref --format="%(refname)" >refs &&
+ grep "refs/bundles/" refs >actual &&
+ cat >expect <<-\EOF &&
+ refs/bundles/topic
+ EOF
+ test_cmp expect actual &&
+ # Ensure that refs/bundles/topic are sent as "have".
+ grep "clone> have $(git -C clone-from rev-parse A)" trace-packet.txt
+'
+
+test_expect_success 'negotiation: bundle with all wanted commits' '
+ test_when_finished rm -rf trace*.txt &&
+ GIT_TRACE_PACKET="$(pwd)/trace-packet.txt" \
+ git clone --no-local --single-branch --branch=topic --no-tags \
+ --bundle-uri="clone-from/B.bundle" \
+ clone-from nego-bundle-all &&
+ git -C nego-bundle-all for-each-ref --format="%(refname)" >refs &&
+ grep "refs/bundles/" refs >actual &&
+ cat >expect <<-\EOF &&
+ refs/bundles/topic
+ EOF
+ test_cmp expect actual &&
+ # We already have all needed commits so no "want" needed.
+ ! grep "clone> want " trace-packet.txt
+'
+
+test_expect_success 'negotiation: bundle list (no heuristic)' '
+ test_when_finished rm -f trace*.txt &&
+ cat >bundle-list <<-EOF &&
+ [bundle]
+ version = 1
+ mode = all
+
+ [bundle "bundle-1"]
+ uri = file://$(pwd)/clone-from/bundle-1.bundle
+
+ [bundle "bundle-2"]
+ uri = file://$(pwd)/clone-from/bundle-2.bundle
+ EOF
+
+ GIT_TRACE_PACKET="$(pwd)/trace-packet.txt" \
+ git clone --no-local --bundle-uri="file://$(pwd)/bundle-list" \
+ clone-from nego-bundle-list-no-heuristic &&
+
+ git -C nego-bundle-list-no-heuristic for-each-ref --format="%(refname)" >refs &&
+ grep "refs/bundles/" refs >actual &&
+ cat >expect <<-\EOF &&
+ refs/bundles/base
+ refs/bundles/left
+ EOF
+ test_cmp expect actual &&
+ grep "clone> have $(git -C nego-bundle-list-no-heuristic rev-parse refs/bundles/left)" trace-packet.txt
+'
+
+test_expect_success 'negotiation: bundle list (creationToken)' '
+ test_when_finished rm -f trace*.txt &&
+ cat >bundle-list <<-EOF &&
+ [bundle]
+ version = 1
+ mode = all
+ heuristic = creationToken
+
+ [bundle "bundle-1"]
+ uri = file://$(pwd)/clone-from/bundle-1.bundle
+ creationToken = 1
+
+ [bundle "bundle-2"]
+ uri = file://$(pwd)/clone-from/bundle-2.bundle
+ creationToken = 2
+ EOF
+
+ GIT_TRACE_PACKET="$(pwd)/trace-packet.txt" \
+ git clone --no-local --bundle-uri="file://$(pwd)/bundle-list" \
+ clone-from nego-bundle-list-heuristic &&
+
+ git -C nego-bundle-list-heuristic for-each-ref --format="%(refname)" >refs &&
+ grep "refs/bundles/" refs >actual &&
+ cat >expect <<-\EOF &&
+ refs/bundles/base
+ refs/bundles/left
+ EOF
+ test_cmp expect actual &&
+ grep "clone> have $(git -C nego-bundle-list-heuristic rev-parse refs/bundles/left)" trace-packet.txt
+'
+
+test_expect_success 'negotiation: bundle list with all wanted commits' '
+ test_when_finished rm -f trace*.txt &&
+ cat >bundle-list <<-EOF &&
+ [bundle]
+ version = 1
+ mode = all
+ heuristic = creationToken
+
+ [bundle "bundle-1"]
+ uri = file://$(pwd)/clone-from/bundle-1.bundle
+ creationToken = 1
+
+ [bundle "bundle-2"]
+ uri = file://$(pwd)/clone-from/bundle-2.bundle
+ creationToken = 2
+ EOF
+
+ GIT_TRACE_PACKET="$(pwd)/trace-packet.txt" \
+ git clone --no-local --single-branch --branch=left --no-tags \
+ --bundle-uri="file://$(pwd)/bundle-list" \
+ clone-from nego-bundle-list-all &&
+
+ git -C nego-bundle-list-all for-each-ref --format="%(refname)" >refs &&
+ grep "refs/bundles/" refs >actual &&
+ cat >expect <<-\EOF &&
+ refs/bundles/base
+ refs/bundles/left
+ EOF
+ test_cmp expect actual &&
+ # We already have all needed commits so no "want" needed.
+ ! grep "clone> want " trace-packet.txt
+'
+
#########################################################################
# HTTP tests begin here
base-commit: 83f1add914c6b4682de1e944ec0d1ac043d53d78
--
gitgitgadget
next reply other threads:[~2024-05-15 3:01 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-15 3:01 blanet via GitGitGadget [this message]
2024-05-17 5:00 ` [PATCH] bundle-uri: refresh packed_git if unbundle succeed Patrick Steinhardt
2024-05-17 16:14 ` Junio C Hamano
2024-05-20 11:48 ` Xing Xin
2024-05-20 17:19 ` Junio C Hamano
2024-05-27 16:04 ` Xing Xin
2024-05-20 9:41 ` Xing Xin
2024-05-17 7:36 ` Karthik Nayak
2024-05-20 10:19 ` Xing Xin
2024-05-20 12:36 ` [PATCH v2] bundle-uri: verify oid before writing refs blanet via GitGitGadget
2024-05-21 15:41 ` Karthik Nayak
2024-05-27 15:41 ` [PATCH v3 0/4] object checking related additions and fixes for bundles in fetches blanet via GitGitGadget
2024-05-27 15:41 ` [PATCH v3 1/4] bundle-uri: verify oid before writing refs Xing Xin via GitGitGadget
2024-05-28 11:55 ` Patrick Steinhardt
2024-05-30 8:32 ` Xing Xin
2024-05-27 15:41 ` [PATCH v3 2/4] unbundle: introduce unbundle_fsck_flags for fsckobjects handling Xing Xin via GitGitGadget
2024-05-28 12:03 ` Patrick Steinhardt
2024-05-29 18:12 ` Xing Xin
2024-05-30 4:38 ` Patrick Steinhardt
2024-05-30 8:46 ` Xing Xin
2024-05-27 15:41 ` [PATCH v3 3/4] fetch-pack: expose fsckObjects configuration logic Xing Xin via GitGitGadget
2024-05-28 12:03 ` Patrick Steinhardt
2024-05-28 17:10 ` Junio C Hamano
2024-05-28 17:24 ` Junio C Hamano
2024-05-29 5:52 ` Patrick Steinhardt
2024-05-30 8:48 ` Xing Xin
2024-05-29 5:52 ` Patrick Steinhardt
2024-05-27 15:41 ` [PATCH v3 4/4] unbundle: introduce new option UNBUNDLE_FSCK_FOLLOW_FETCH Xing Xin via GitGitGadget
2024-05-28 12:05 ` Patrick Steinhardt
2024-05-30 8:54 ` Xing Xin
2024-05-30 8:21 ` [PATCH v4 0/4] object checking related additions and fixes for bundles in fetches blanet via GitGitGadget
2024-05-30 8:21 ` [PATCH v4 1/4] bundle-uri: verify oid before writing refs Xing Xin via GitGitGadget
2024-05-30 8:21 ` [PATCH v4 2/4] unbundle: extend verify_bundle_flags to support fsck-objects Xing Xin via GitGitGadget
2024-06-06 12:06 ` Patrick Steinhardt
2024-06-11 6:46 ` Xing Xin
2024-05-30 8:21 ` [PATCH v4 3/4] fetch-pack: expose fsckObjects configuration logic Xing Xin via GitGitGadget
2024-05-30 8:21 ` [PATCH v4 4/4] unbundle: introduce option VERIFY_BUNDLE_FSCK_FOLLOW_FETCH Xing Xin via GitGitGadget
2024-06-06 12:06 ` Patrick Steinhardt
2024-06-11 6:46 ` Xing Xin
2024-06-11 6:42 ` [PATCH v5 0/4] object checking related additions and fixes for bundles in fetches blanet via GitGitGadget
2024-06-11 6:42 ` [PATCH v5 1/4] bundle-uri: verify oid before writing refs Xing Xin via GitGitGadget
2024-06-11 6:42 ` [PATCH v5 2/4] fetch-pack: expose fsckObjects configuration logic Xing Xin via GitGitGadget
2024-06-11 6:42 ` [PATCH v5 3/4] unbundle: extend options to support object verification Xing Xin via GitGitGadget
2024-06-11 9:11 ` Patrick Steinhardt
2024-06-11 12:47 ` Xing Xin
2024-06-11 6:42 ` [PATCH v5 4/4] unbundle: use VERIFY_BUNDLE_FSCK_FOLLOW_FETCH for fetches Xing Xin via GitGitGadget
2024-06-11 12:45 ` [PATCH v6 0/3] object checking related additions and fixes for bundles in fetches blanet via GitGitGadget
2024-06-11 12:45 ` [PATCH v6 1/3] bundle-uri: verify oid before writing refs Xing Xin via GitGitGadget
2024-06-11 19:08 ` Junio C Hamano
2024-06-17 13:53 ` Xing Xin
2024-06-11 12:45 ` [PATCH v6 2/3] fetch-pack: expose fsckObjects configuration logic Xing Xin via GitGitGadget
2024-06-11 19:20 ` Junio C Hamano
2024-06-11 12:45 ` [PATCH v6 3/3] unbundle: support object verification for fetches Xing Xin via GitGitGadget
2024-06-11 20:05 ` Junio C Hamano
2024-06-12 18:33 ` Xing Xin
2024-06-11 13:14 ` [PATCH v6 0/3] object checking related additions and fixes for bundles in fetches Patrick Steinhardt
2024-06-17 13:55 ` [PATCH v7 " blanet via GitGitGadget
2024-06-17 13:55 ` [PATCH v7 1/3] bundle-uri: verify oid before writing refs Xing Xin via GitGitGadget
2024-06-18 17:37 ` Junio C Hamano
2024-06-19 6:30 ` Xing Xin
2024-06-17 13:55 ` [PATCH v7 2/3] fetch-pack: expose fsckObjects configuration logic Xing Xin via GitGitGadget
2024-06-17 13:55 ` [PATCH v7 3/3] unbundle: extend object verification for fetches Xing Xin via GitGitGadget
2024-06-19 4:07 ` [PATCH v8 0/3] object checking related additions and fixes for bundles in fetches blanet via GitGitGadget
2024-06-19 4:07 ` [PATCH v8 1/3] bundle-uri: verify oid before writing refs Xing Xin via GitGitGadget
2024-06-19 4:07 ` [PATCH v8 2/3] fetch-pack: expose fsckObjects configuration logic Xing Xin via GitGitGadget
2024-06-19 4:07 ` [PATCH v8 3/3] unbundle: extend object verification for fetches Xing Xin via GitGitGadget
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