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The `fetch.followRemoteHEAD` configuration variable has been added to
provide a default for the per-remote `remote.<name>.followRemoteHEAD`
setting.
* mh/fetch-follow-remote-head-config:
fetch: fixup a misaligned comment
fetch: add configuration variable fetch.followRemoteHEAD
fetch: refactor do_fetch handling of followRemoteHEAD
fetch: return 0 on known git_fetch_config
fetch: rename function report_set_head
t5510: cleanup remote in followRemoteHEAD dangling ref test
doc: explain fetchRemoteHEADWarn advice
fetch: fixup set_head advice for warn-if-not-branch
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The handling of promisor-remote protocol capability has been updated
to allow the other side to add to the list of promisor remotes via the
'promisor.acceptFromServerURL' configuration variable.
* cc/promisor-auto-config-url-more:
doc: promisor: improve acceptFromServer entry
promisor-remote: auto-configure unknown remotes
promisor-remote: trust known remotes matching acceptFromServerUrl
promisor-remote: introduce promisor.acceptFromServerUrl
promisor-remote: add 'local_name' to 'struct promisor_info'
urlmatch: add url_normalize_pattern() helper
urlmatch: change 'allow_globs' arg to bool
t5710: simplify 'mkdir X' followed by 'git -C X init'
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'fetch.followRemoteHEAD' is added as a generic setting used by all
remotes for which 'remote.<name>.followRemoteHEAD' is undefined. If
both variables are undefined, a builtin default of "create" is in
effect, matching the previous behavior.
As mentioned in the previous patch, 'fetch.followRemoteHEAD' supports
all of the values that its 'remote' counterpart does _except_
warn-if-not-$branch, due to its tighter coupling to individual remote
repositories.
This setting interacts with the do_fetch mechanism in the same way as
the previous does, but there are opportunities for improved
user-experience discussed in [1]. See the included NEEDSWORK comment as
well.
Documentation and advice messages for both of the followRemoteHEAD
variables are reworded to better capture the relationship between the
two.
The added tests assert feature parity between the two followRemoteHEAD
variables, as well as the fact that 'remote.<name>.followRemoteHEAD'
always supersedes this new configurable default.
[1]: https://lore.kernel.org/git/xmqqh5n213bw.fsf@gitster.g/
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Matt Hunter <m@lfurio.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Previous commits have introduced the `promisor.acceptFromServerUrl`
config variable to allowlist some URLs advertised by a server through
the "promisor-remote" protocol capability.
However the new `promisor.acceptFromServerUrl` mechanism, like the old
`promisor.acceptFromServer` mechanism, still requires a remote to
already exist in the client's local configuration before it can be
accepted. This places a significant manual burden on users to
pre-configure these remotes, and creates friction for administrators
who have to troubleshoot or manually provision these setups for their
teams.
To eliminate this burden, let's automatically create a new `[remote]`
section in the client's config when a server advertises an unknown
remote whose URL matches a `promisor.acceptFromServerUrl` glob pattern.
Concretely, let's add four helpers:
- sanitize_remote_name(): turn an arbitrary URL-derived string into a
valid remote name by replacing non-alphanumeric characters,
collapsing runs of '-', and prepending "promisor-auto-".
- promisor_remote_name_from_url(): normalize the URL and extract
host+port+path to build a human-readable base name, then pass it
through sanitize_remote_name().
- configure_auto_promisor_remote(): write the remote.*.url,
remote.*.promisor and remote.*.advertisedAs keys to the repo
config.
- handle_matching_allowed_url(): pick the final name (user-supplied
alias or auto-generated), handle collisions by appending "-1",
"-2", etc., then call configure_auto_promisor_remote().
Let's also add should_accept_new_remote_url() which reuses the
url_matches_accept_list() helper introduced in a previous commit to
find a matching pattern, then delegates to handle_matching_allowed_url()
to create the remote.
And then let's call should_accept_new_remote_url() from the '!item'
(unknown remote) branch of should_accept_remote(), setting
`reload_config` so that the newly-written config is picked up.
Finally let's document all that by:
- expanding the `promisor.acceptFromServerUrl` entry to describe
auto-creation, the optional "name=" prefix syntax, the
"promisor-auto-*" generation rules, and numeric-suffix collision
handling, and by
- adding a "remote.<name>.advertisedAs" entry to "remote.adoc".
Also let's extend the precedence paragraph added by a previous commit
to mention this new acceptance path: until now, the only way for
`promisor.acceptFromServerUrl` to trigger acceptance was to allow
field updates for a known remote. With this commit, it can also trigger
auto-creation of a previously-unknown remote whose advertised URL
matches the allowlist.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When push.negotiate is enabled, 'git push' spawns a child 'git fetch
--negotiate-only' process to find common commits. Pass
--negotiation-include and --negotiation-restrict options from the
'remote.<name>.negotiationInclude' and
'remote.<name>.negotiationRestrict' config keys to this child process.
When negotiationRestrict is configured, it replaces the default
behavior of using all remote refs as negotiation tips. This allows
the user to control which local refs are used for push negotiation.
When negotiationInclude is configured, the specified ref patterns
are passed as --negotiation-include to ensure their tips are always
sent as 'have' lines during push negotiation.
Reviewed-by: Matthew John Cheetham <mjcheetham@outlook.com>
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a new 'remote.<name>.negotiationInclude' multi-valued config option that
provides default values for --negotiation-include when no
--negotiation-include arguments are specified over the command line. This
is a mirror of how 'remote.<name>.negotiationRestrict' specifies defaults
for the --negotiation-restrict arguments.
Each value is either an exact ref name or a glob pattern whose tips should
always be sent as 'have' lines during negotiation. The config values are
resolved through the same resolve_negotiation_include() codepath as the CLI
options.
This option is additive with the normal negotiation process: the negotiation
algorithm still runs and advertises its own selected commits, but the refs
matching the config are sent unconditionally on top of those heuristically
selected commits.
Similar to the negotiationRestrict config, an empty value resets the value
list to allow ignoring earlier config values, such as those that might be
set in system or global config.
Reviewed-by: Matthew John Cheetham <mjcheetham@outlook.com>
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a previous change, the --negotiation-restrict command-line option of 'git
fetch' was added as a synonym of --negotiation-tip. Both of these options
restrict the set of 'haves' the client can send as part of negotiation.
This was previously not available via a configuration option. Add a new
'remote.<name>.negotiationRestrict' multi-valued config option that updates
'git fetch <name>' to use these restrictions by default.
If the user provides even one --negotiation-restrict argument, then the
config is ignored.
An empty value resets the value list to allow ignoring earlier config
values, such as those that might be set in system or global config.
Reviewed-by: Matthew John Cheetham <mjcheetham@outlook.com>
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The new followRemoteHEAD feature is triggered for almost every fetch,
causing us to ask the server about the remote "HEAD" and to consider
updating our local tracking HEAD symref. This patch limits the feature
only to the case when we are fetching a remote using its configured
refspecs (typically into its refs/remotes/ hierarchy). There are two
reasons for this.
One is efficiency. E.g., the fixes in 6c915c3f85 (fetch: do not ask for
HEAD unnecessarily, 2024-12-06) and 20010b8c20 (fetch: avoid ls-refs
only to ask for HEAD symref update, 2025-03-08) were aimed at reducing
the work we do when we would not be able to update HEAD anyway. But they
do not quite cover all cases. The remaining one is:
git fetch origin refs/heads/foo:refs/remotes/origin/foo
which _sometimes_ can update HEAD, but usually not. And that leads us to
the second point, which is being simple and explainable.
The code for updating the tracking HEAD symref requires both that we
learned which ref the remote HEAD points at, and that the server
advertised that ref to us. But because the v2 protocol narrows the
server's advertisement, the command above would not typically update
HEAD at all, unless it happened to point to the "foo" branch. Or even
weirder, it probably _would_ update if the server is very old and
supports only the v0 protocol, which always gives a full advertisement.
This creates confusing behavior for the user: sometimes we may try to
update HEAD and sometimes not, depending on vague rules.
One option here would be to loosen the update code to accept the remote
HEAD even if the server did not advertise that ref. I think that could
work, but it may also lead to interesting corner cases (e.g., creating a
dangling symref locally, even though the branch is not unborn on the
server, if we happen not to have fetched it).
So let's instead simplify the rules: we'll only consider updating the
tracking HEAD symref when we're doing a full fetch of the remote's
configured refs. This is easy to implement; we can just set a flag at
the moment we realize we're using the configured refspecs. And we can
drop the special case code added by 6c915c3f85 and 20010b8c20, since
this covers those cases. The existing tests from those commits still
pass.
In t5505, an incidental call to "git fetch <remote> <refspec>" updated
HEAD, which caused us to adjust the test in 3f763ddf28 (fetch: set
remote/HEAD if it does not exist, 2024-11-22). We can now adjust that
back to how it was before the feature was added.
Even though t5505 is incidentally testing our new desired behavior,
we'll add an explicit test in t5510 to make sure it is covered.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Doc updates.
* pb/doc-follow-remote-head:
config/remote.txt: improve wording for 'remote.<name>.followRemoteHEAD'
config/remote.txt: reunite 'severOption' description paragraphs
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We presently use the ".txt" extension for our AsciiDoc files. While not
wrong, most editors do not associate this extension with AsciiDoc,
meaning that contributors don't get automatic editor functionality that
could be useful, such as syntax highlighting and prose linting.
It is much more common to use the ".adoc" extension for AsciiDoc files,
since this helps editors automatically detect files and also allows
various forges to provide rich (HTML-like) rendering. Let's do that
here, renaming all of the files and updating the includes where
relevant. Adjust the various build scripts and makefiles to use the new
extension as well.
Note that this should not result in any user-visible changes to the
documentation.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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