From: Glen Choo <chooglen@google.com>
To: git@vger.kernel.org
Cc: Glen Choo <chooglen@google.com>,
Jonathan Tan <jonathantanmy@google.com>,
Junio C Hamano <gitster@pobox.com>
Subject: [PATCH v5 0/3] fetch: skip unnecessary tasks when using --negotiate-only
Date: Tue, 18 Jan 2022 10:54:50 -0800 [thread overview]
Message-ID: <20220118185453.33710-1-chooglen@google.com> (raw)
In-Reply-To: <20220113004501.78822-1-chooglen@google.com>
`git fetch --negotiate-only` is used internally by push negotation and
it behaves very differently from other uses of `git fetch`, e.g. it does
not update refs or fetch objects. But because of how cmd_fetch() is
written, `git fetch --negotiate-only` performs tasks that it shouldn't.
This is results in behavior that is unnecessary at best, and incorrect
at worst:
* Submodules are updated if enabled by recurse.submodules=true, but
negotiation fetch doesn't actually update the repo, so this doesn't
make sense.
* Commit graphs will be written if enabled by
fetch.writeCommitGraph=true, but this is unnecessary because no
objects are fetched [1].
* gc is run, but according to the commit message in [2], we only do this
because we expect `git fetch` to introduce objects.
Make `git fetch --negotiate-only` handle these tasks more rigorously by
doing the following:
* Make cmd_fetch() skip irrelevant tasks if we know for certain that
objects will not be fetched
* Disable submodule recursion and die() if a user explicitly asks for it
[1] This is also confirmed by Documentation/config/fetch.txt, which
states that Git should only write commit graphs if a pack-file is
downloaded.
[2] 131b8fcbfb (fetch: run gc --auto after fetching, 2013-01-26)
Changes since v4:
* drop an unnecessary block (thanks Junio!)
Changes since v3:
* change commit message subject: builtin/fetch -> fetch --negotiate-only
* move the 'goto cleanup' to _after_ the submodule updating task because
we may want to update submodules even if objects were not fetched (as
pointed out by Junio, thanks!)
* disable submodule recursion in the patch that checks for
--negotiate-only + --recurse-submodules, so we never silently ignore
--recurse-submodules.
* incorporate some of Jonathan's suggestions (thanks!)
Changes since v2:
* added a prepatory patch that introduces a "goto cleanup"
* drop an unnecessary line move (as suggested by Junio)
* check for user-given --recurse-submodules and die() (as suggested by
Jonathan and Junio)
* update --negotiate-only's documentation
Changes since v1:
* added more context to commit message
* added a NEEDSWORK comment
Glen Choo (3):
fetch: use goto cleanup in cmd_fetch()
fetch: skip tasks related to fetching objects
fetch --negotiate-only: do not update submodules
Documentation/fetch-options.txt | 1 +
builtin/fetch.c | 40 ++++++++++++++++++++++++++++++---
t/t5516-fetch-push.sh | 12 ++++++++++
t/t5702-protocol-v2.sh | 12 ++++++++++
4 files changed, 62 insertions(+), 3 deletions(-)
Range-diff against v4:
1: ffa1a24109 = 1: ffa1a24109 fetch: use goto cleanup in cmd_fetch()
2: b0c73e8135 = 2: b0c73e8135 fetch: skip tasks related to fetching objects
3: 914d30866f ! 3: f929297961 fetch --negotiate-only: do not update submodules
@@ builtin/fetch.c: int cmd_fetch(int argc, const char **argv, const char *prefix)
+ if (recurse_submodules_cli != RECURSE_SUBMODULES_DEFAULT)
+ recurse_submodules = recurse_submodules_cli;
+
-+ if (negotiate_only) {
++ if (negotiate_only)
+ switch (recurse_submodules_cli) {
+ case RECURSE_SUBMODULES_OFF:
+ case RECURSE_SUBMODULES_DEFAULT: {
@@ builtin/fetch.c: int cmd_fetch(int argc, const char **argv, const char *prefix)
+ default:
+ die(_("--negotiate-only and --recurse-submodules cannot be used together"));
+ }
-+ }
++
+
if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
int *sfjc = submodule_fetch_jobs_config == -1
base-commit: 90d242d36e248acfae0033274b524bfa55a947fd
--
2.33.GIT
next prev parent reply other threads:[~2022-01-18 18:55 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-07 19:29 [PATCH] builtin/fetch: skip unnecessary tasks when using --negotiate-only Glen Choo
2021-12-09 22:12 ` Jonathan Tan
2021-12-09 22:36 ` Glen Choo
2021-12-13 22:58 ` Jonathan Tan
2021-12-16 18:11 ` Glen Choo
2021-12-17 0:02 ` [PATCH v2] " Glen Choo
2021-12-17 23:35 ` Junio C Hamano
2021-12-20 19:37 ` Glen Choo
2021-12-20 19:56 ` Junio C Hamano
2021-12-20 20:54 ` Glen Choo
2021-12-20 22:12 ` Junio C Hamano
2021-12-21 0:18 ` Glen Choo
2021-12-21 23:07 ` Glen Choo
2021-12-22 0:11 ` [PATCH v3 0/3] " Glen Choo
2021-12-22 0:11 ` [PATCH v3 1/3] builtin/fetch: use goto cleanup in cmd_fetch() Glen Choo
2021-12-22 0:11 ` [PATCH v3 2/3] builtin/fetch: skip unnecessary tasks when using --negotiate-only Glen Choo
2021-12-22 6:42 ` Junio C Hamano
2021-12-22 17:28 ` Glen Choo
2021-12-22 19:29 ` Junio C Hamano
2021-12-22 20:27 ` Glen Choo
2021-12-22 0:11 ` [PATCH v3 3/3] builtin/fetch: die on --negotiate-only and --recurse-submodules Glen Choo
2021-12-22 6:46 ` Junio C Hamano
2021-12-23 19:08 ` Jonathan Tan
2022-01-13 0:44 ` [PATCH v4 0/3] fetch: skip unnecessary tasks when using --negotiate-only Glen Choo
2022-01-13 0:44 ` [PATCH v4 1/3] fetch: use goto cleanup in cmd_fetch() Glen Choo
2022-01-13 0:45 ` [PATCH v4 2/3] fetch: skip tasks related to fetching objects Glen Choo
2022-01-13 0:45 ` [PATCH v4 3/3] fetch --negotiate-only: do not update submodules Glen Choo
2022-01-13 1:16 ` Junio C Hamano
2022-01-18 18:54 ` Glen Choo [this message]
2022-01-18 18:54 ` [PATCH v5 1/3] fetch: use goto cleanup in cmd_fetch() Glen Choo
2022-01-18 18:54 ` [PATCH v5 2/3] fetch: skip tasks related to fetching objects Glen Choo
2022-01-18 18:54 ` [PATCH v5 3/3] fetch --negotiate-only: do not update submodules Glen Choo
2022-01-18 22:05 ` Junio C Hamano
2022-01-18 23:41 ` Glen Choo
2022-01-19 0:26 ` Junio C Hamano
2022-01-19 0:00 ` [PATCH v6 0/3] fetch: skip unnecessary tasks when using --negotiate-only Glen Choo
2022-01-19 0:00 ` [PATCH v6 1/3] fetch: use goto cleanup in cmd_fetch() Glen Choo
2022-01-19 0:00 ` [PATCH v6 2/3] fetch: skip tasks related to fetching objects Glen Choo
2022-01-19 0:00 ` [PATCH v6 3/3] fetch --negotiate-only: do not update submodules Glen Choo
2022-01-20 2:38 ` Jiang Xin
2022-01-20 17:40 ` Glen Choo
2022-01-20 17:49 ` [PATCH v7 0/3] fetch: skip unnecessary tasks when using --negotiate-only Glen Choo
2022-01-20 17:49 ` [PATCH v7 1/3] fetch: use goto cleanup in cmd_fetch() Glen Choo
2022-01-20 17:49 ` [PATCH v7 2/3] fetch: skip tasks related to fetching objects Glen Choo
2022-01-20 17:49 ` [PATCH v7 3/3] fetch --negotiate-only: do not update submodules Glen Choo
2022-01-20 23:08 ` Junio C Hamano
2022-01-20 23:16 ` Glen Choo
2022-01-20 21:58 ` Re* [PATCH v7 0/3] fetch: skip unnecessary tasks when using --negotiate-only Junio C Hamano
2022-01-20 23:15 ` Glen Choo
2022-01-21 2:17 ` Jiang Xin
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