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Jonathan Tan 9c1e657a8f fetch: teach independent negotiation (no packfile) 
Currently, the packfile negotiation step within a Git fetch cannot be
done independent of sending the packfile, even though there is at least
one application wherein this is useful. Therefore, make it possible for
this negotiation step to be done independently. A subsequent commit will
use this for one such application - push negotiation.

This feature is for protocol v2 only. (An implementation for protocol v0
would require a separate implementation in the fetch, transport, and
transport helper code.)

In the protocol, the main hindrance towards independent negotiation is
that the server can unilaterally decide to send the packfile. This is
solved by a "wait-for-done" argument: the server will then wait for the
client to say "done". In practice, the client will never say it; instead
it will cease requests once it is satisfied.

In the client, the main change lies in the transport and transport
helper code. fetch_refs_via_pack() performs everything needed - protocol
version and capability checks, and the negotiation itself.

There are 2 code paths that do not go through fetch_refs_via_pack() that
needed to be individually excluded: the bundle transport (excluded
through requiring smart_options, which the bundle transport doesn't
support) and transport helpers that do not support takeover. If or when
we support independent negotiation for protocol v0, we will need to
modify these 2 code paths to support it. But for now, report failure if
independent negotiation is requested in these cases.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-05-05 10:41:29 +09:00
..
add.c add: propagate --chmod errors to exit status 2021-02-24 12:14:51 -08:00
am.c builtin/*: update usage format 2021-01-06 15:10:49 -08:00
annotate.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
apply.c
archive.c
bisect--helper.c Merge branch 'jk/bisect-peel-tag-fix' 2021-03-19 15:25:37 -07:00
blame.c Merge branch 'rs/blame-optim' 2021-02-25 16:43:29 -08:00
branch.c Merge branch 'ph/use-delete-refs' 2021-02-05 16:40:45 -08:00
bugreport.c builtin/bugreport.c: use thread-safe localtime_r() 2020-12-01 13:05:37 -08:00
bundle.c Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
cat-file.c Merge branch 'cc/cat-file-usage-update' into master 2020-07-09 14:00:41 -07:00
check-attr.c
check-ignore.c dir: fix problematic API to avoid memory leaks 2020-08-18 17:17:31 -07:00
check-mailmap.c shortlog: remove unused(?) "repo-abbrev" feature 2021-01-12 14:04:42 -08:00
check-ref-format.c
checkout-index.c entry: extract a header file for entry.c functions 2021-03-23 10:34:05 -07:00
checkout.c Merge branch 'mt/parallel-checkout-part-1' 2021-04-02 14:43:14 -07:00
clean.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
clone.c Merge branch 'll/clone-reject-shallow' 2021-04-08 13:23:25 -07:00
column.c column, range-diff: downcase option description 2021-03-29 14:06:08 -07:00
commit-graph.c builtin/*: update usage format 2021-01-06 15:10:49 -08:00
commit-tree.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
commit.c Merge branch 'zh/commit-trailer' 2021-04-07 16:54:08 -07:00
config.c config: implement --fixed-value with --get* 2020-11-25 14:43:48 -08:00
count-objects.c
credential-cache--daemon.c unix-socket: add backlog size option to unix_stream_listen() 2021-03-15 14:32:51 -07:00
credential-cache.c unix-socket: disallow chdir() when creating unix domain sockets 2021-03-15 14:32:51 -07:00
credential-store.c crendential-store: use timeout when locking file 2020-11-25 12:30:18 -08:00
credential.c credential: load default config 2020-10-16 12:30:45 -07:00
describe.c refs: switch peel_ref() to peel_iterated_oid() 2021-01-21 15:51:31 -08:00
diff-files.c Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
diff-index.c Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
diff-tree.c Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
diff.c Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
difftool.c entry: extract a header file for entry.c functions 2021-03-23 10:34:05 -07:00
env--helper.c assert PARSE_OPT_NONEG in parse-options callbacks 2020-09-30 12:53:47 -07:00
fast-export.c builtin/*: update usage format 2021-01-06 15:10:49 -08:00
fast-import.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
fetch-pack.c connect, transport: encapsulate arg in struct 2021-02-05 13:49:54 -08:00
fetch.c fetch: teach independent negotiation (no packfile) 2021-05-05 10:41:29 +09:00
fmt-merge-msg.c Lib-ify fmt-merge-msg 2020-03-24 15:04:43 -07:00
for-each-ref.c ref-filter: move ref_sorting flags to a bitfield 2021-01-07 15:13:21 -08:00
for-each-repo.c for-each-repo: do nothing on empty config 2021-01-07 19:12:02 -08:00
fsck.c fsck.c: pass along the fsck_msg_id in the fsck_error callback 2021-03-28 19:03:10 -07:00
gc.c maintenance: fix incorrect maintenance.repo path with bare repository 2021-02-23 00:22:45 -08:00
get-tar-commit-id.c
grep.c Merge branch 'ab/grep-pcre2-allocfix' 2021-03-22 14:00:23 -07:00
hash-object.c
help.c help: drop usage of 'common' and 'useful' for guides 2020-08-04 18:34:01 -07:00
index-pack.c Merge branch 'ab/fsck-api-cleanup' 2021-04-07 16:54:09 -07:00
init-db.c Merge branch 'ah/plugleaks' 2021-04-07 16:54:08 -07:00
interpret-trailers.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
log.c Merge branch 'zh/format-patch-fractional-reroll-count' 2021-04-02 14:43:14 -07:00
ls-files.c tree.h API: simplify read_tree_recursive() signature 2021-03-20 16:09:26 -07:00
ls-remote.c Merge branch 'ah/plugleaks' 2021-04-07 16:54:08 -07:00
ls-tree.c tree.h API: simplify read_tree_recursive() signature 2021-03-20 16:09:26 -07:00
mailinfo.c
mailsplit.c
merge-base.c rebase: --fork-point regression fix 2020-02-11 09:59:39 -08:00
merge-file.c
merge-index.c
merge-ours.c
merge-recursive.c Ensure index matches head before invoking merge machinery, round N 2019-08-19 10:08:03 -07:00
merge-tree.c merge-base, xdiff: zero out xpparam_t structures 2020-10-20 12:53:26 -07:00
merge.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
mktag.c fsck.c: add an fsck_set_msg_type() API that takes enums 2021-03-28 19:03:10 -07:00
mktree.c
multi-pack-index.c midx: allow marking a pack as preferred 2021-04-01 13:07:37 -07:00
mv.c git mv foo FOO ; git mv foo bar gave an assert 2021-03-03 17:07:12 -08:00
name-rev.c oid_pos(): access table through const pointers 2021-01-28 12:03:26 -08:00
notes.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pack-objects.c Merge branch 'hx/pack-objects-chunk-comment' 2021-03-30 14:35:37 -07:00
pack-redundant.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pack-refs.c
patch-id.c patch-id: use oid_to_hex() to print multiple object IDs 2019-12-09 12:26:40 -08:00
prune-packed.c Lib-ify prune-packed 2020-03-24 15:04:44 -07:00
prune.c Merge branch 'tb/shallow-cleanup' 2020-05-13 12:19:18 -07:00
pull.c pull: display default warning only when non-ff 2020-12-15 17:39:42 -08:00
push.c Merge branch 'jc/push-delete-nothing' 2021-02-25 16:43:33 -08:00
range-diff.c column, range-diff: downcase option description 2021-03-29 14:06:08 -07:00
read-tree.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
rebase.c rebase: remove transitory rebase.useBuiltin setting & env 2021-03-23 14:05:58 -07:00
receive-pack.c Merge branch 'rs/calloc-array' 2021-03-19 15:25:38 -07:00
reflog.c reflog expire --stale-fix: be generous about missing objects 2021-02-11 09:21:52 -08:00
remote-ext.c strvec: convert builtin/ callers away from argv_array name 2020-07-28 15:02:18 -07:00
remote-fd.c
remote.c Merge branch 'ah/plugleaks' 2021-04-07 16:54:08 -07:00
repack.c Merge branch 'tb/reverse-midx' 2021-04-08 13:23:25 -07:00
replace.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
rerere.c
reset.c reset: free instead of leaking unneeded ref 2021-03-14 15:57:59 -07:00
rev-list.c rev-list: add --disk-usage option for calculating disk usage 2021-02-11 09:57:55 -08:00
rev-parse.c rev-parse: add option for absolute or relative path formatting 2020-12-12 23:35:51 -08:00
revert.c sequencer: fix edit handling for cherry-pick and revert messages 2021-03-31 14:10:50 -07:00
rm.c rm: support the --pathspec-from-file option 2020-02-19 10:56:49 -08:00
send-pack.c push: parse and set flag for "--force-if-includes" 2020-10-03 09:59:19 -07:00
shortlog.c Merge branch 'ab/mailmap' 2021-01-25 14:19:19 -08:00
show-branch.c Merge branch 'jt/interpret-branch-name-fallback' 2020-09-09 13:53:09 -07:00
show-index.c builtin/show-index: provide options to determine hash algo 2020-05-27 10:07:07 -07:00
show-ref.c refs: switch peel_ref() to peel_iterated_oid() 2021-01-21 15:51:31 -08:00
sparse-checkout.c exclude: add flags parameter to add_patterns() 2021-02-16 09:41:33 -08:00
stash.c Merge branch 'mt/parallel-checkout-part-1' 2021-04-02 14:43:14 -07:00
stripspace.c
submodule--helper.c Merge branch 'tb/precompose-prefix-too' 2021-02-12 14:21:04 -08:00
symbolic-ref.c symbolic-ref: don't leak shortened refname in check_symref() 2021-03-14 15:57:59 -07:00
tag.c Merge branch 'js/params-vs-args' 2021-02-25 16:43:32 -08:00
unpack-file.c
unpack-objects.c Merge branch 'ab/fsck-api-cleanup' 2021-04-07 16:54:09 -07:00
update-index.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
update-ref.c update-ref: disallow "start" for ongoing transactions 2020-11-16 13:44:01 -08:00
update-server-info.c
upload-archive.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
upload-pack.c
var.c
verify-commit.c Merge branch 'jk/no-system-includes-in-dot-c' 2019-07-31 14:38:56 -07:00
verify-pack.c Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
verify-tag.c verify-tag: drop signal.h include 2019-06-19 08:19:21 -07:00
worktree.c worktree: fix leak in dwim_branch() 2021-03-14 15:57:59 -07:00
write-tree.c