What's cooking (2020/07 #01)

todo
Junio C Hamano 2020-07-06 22:48:56 -07:00
parent fff587ab21
commit 06ad1f9e05
1 changed files with 356 additions and 351 deletions

View File

@ -1,10 +1,10 @@
To: git@vger.kernel.org
Bcc: lwn@lwn.net
Subject: What's cooking in git.git (Jun 2020, #06; Mon, 29)
X-master-at: a08a83db2bf27f015bec9a435f6d73e223c21c5e
X-next-at: 050319c2ae82f2fac00eac9d80a1d91394d99aec
Subject: What's cooking in git.git (Jul 2020, #01; Mon, 6)
X-master-at: 4a0fcf9f760c9774be77f51e1e88a7499b53d2e2
X-next-at: b3809f4674cea6e2f5db8a478a39b85851690c7d

What's cooking in git.git (Jun 2020, #06; Mon, 29)
What's cooking in git.git (Jul 2020, #01; Mon, 6)
--------------------------------------------------

Here are the topics that have been cooking. Commits prefixed with '-' are
@ -12,11 +12,10 @@ only in 'seen' (formerly 'pu'---proposed updates) while commits prefixed
with '+' are in 'next'. The ones marked with '.' do not appear in any of
the integration branches, but I am still holding onto them.

More topics graduate to the 'master' and to the 'next' branches. I
expect that this week would be slower than usual due to US holidays
but hopefully we'd be able to merge most of the impactful topics by
the -rc0. Some large-ish topics may have to be left for the next
cycle, as usual.
We are about to tag the -rc0 "preview" and enter pre-release freeze
period. The change to let users name the initial branch that gets
prepared in a newly created repository has now been merged to be
included in the upcoming release.

You can find the changes described here in the integration branches of the
repositories listed at
@ -24,74 +23,336 @@ repositories listed at
http://git-blame.blogspot.com/p/git-public-repositories.html

--------------------------------------------------
[Graduated to "master"]
[Graduated to 'master']

* dl/diff-usage-comment-update (2020-06-23) 2 commits
(merged to 'next' on 2020-06-23 at 48d685cd45)
+ builtin/diff: fix botched update of usage comment
(merged to 'next' on 2020-06-19 at b53a12bb66)
+ builtin/diff: update usage comment
* ak/commit-graph-to-slab (2020-06-17) 4 commits
(merged to 'next' on 2020-06-25 at 9a10ae18d3)
+ commit-graph: minimize commit_graph_data_slab access
+ commit: move members graph_pos, generation to a slab
+ commit-graph: introduce commit_graph_data_slab
+ object: drop parsed_object_pool->commit_count

An in-code comment in "git diff" has been updated.
A few fields in "struct commit" that do not have to always be
present have been moved to commit slabs.


* rs/commit-reach-leakfix (2020-06-19) 1 commit
(merged to 'next' on 2020-06-22 at fcc1e385f0)
+ commit-reach: plug minor memory leak after using is_descendant_of()
* bc/http-push-flagsfix (2020-06-23) 1 commit
(merged to 'next' on 2020-06-25 at 1dabb1f61b)
+ http-push: ensure unforced pushes fail when data would be lost

Leakfix.
The code to push changes over "dumb" HTTP had a bad interaction
with the commit reachability code due to incorrect allocation of
object flag bits, which has been corrected.


* rs/pull-leakfix (2020-06-19) 1 commit
(merged to 'next' on 2020-06-22 at d80a6b9ca3)
+ pull: plug minor memory leak after using is_descendant_of()
* bc/sha-256-cvs-svn-updates (2020-06-22) 14 commits
(merged to 'next' on 2020-06-25 at e0d1c87fcf)
+ git-cvsexportcommit: port to SHA-256
+ git-cvsimport: port to SHA-256
+ git-cvsserver: port to SHA-256
+ git-svn: set the OID length based on hash algorithm
+ perl: make SVN code hash independent
+ perl: make Git::IndexInfo work with SHA-256
+ perl: create and switch variables for hash constants
+ t/lib-git-svn: make hash size independent
+ t9101: make hash independent
+ t9104: make hash size independent
+ t9100: make test work with SHA-256
+ t9108: make test hash independent
+ t9168: make test hash independent
+ t9109: make test hash independent
(this branch uses bc/sha-256-part-2.)

Leakfix.
CVS/SVN interface have been prepared for SHA-256 transition


* rs/retire-strbuf-write-fd (2020-06-19) 2 commits
(merged to 'next' on 2020-06-22 at c175b54f2a)
+ strbuf: remove unreferenced strbuf_write_fd method.
+ bugreport.c: replace strbuf_write_fd with write_in_full
* bc/sha-256-part-2 (2020-06-19) 44 commits
(merged to 'next' on 2020-06-22 at dc153f366d)
+ remote-testgit: adapt for object-format
+ bundle: detect hash algorithm when reading refs
+ t5300: pass --object-format to git index-pack
+ t5704: send object-format capability with SHA-256
+ t5703: use object-format serve option
+ t5702: offer an object-format capability in the test
+ t/helper: initialize the repository for test-sha1-array
+ remote-curl: avoid truncating refs with ls-remote
+ t1050: pass algorithm to index-pack when outside repo
+ builtin/index-pack: add option to specify hash algorithm
+ remote-curl: detect algorithm for dumb HTTP by size
+ builtin/ls-remote: initialize repository based on fetch
+ t5500: make hash independent
+ serve: advertise object-format capability for protocol v2
+ connect: parse v2 refs with correct hash algorithm
+ connect: pass full packet reader when parsing v2 refs
+ Documentation/technical: document object-format for protocol v2
+ t1302: expect repo format version 1 for SHA-256
+ builtin/show-index: provide options to determine hash algo
+ t5302: modernize test formatting
+ packfile: compute and use the index CRC offset
+ t3200: mark assertion with SHA1 prerequisite
+ setup: set the_repository's hash algo when checking format
+ fetch-pack: parse and advertise the object-format capability
+ t5562: pass object-format in synthesized test data
+ builtin/clone: initialize hash algorithm properly
+ remote-curl: implement object-format extensions
+ transport-helper: implement object-format extensions
+ docs: update remote helper docs for object-format extensions
+ builtin/receive-pack: detect when the server doesn't support our hash
+ connect: detect algorithm when fetching refs
+ fetch-pack: detect when the server doesn't support our hash
+ connect: make parse_feature_value extern
+ send-pack: detect when the server doesn't support our hash
+ connect: add function to detect supported v1 hash functions
+ transport: add a hash algorithm member
+ pkt-line: add a member for hash algorithm
+ connect: add function to fetch value of a v2 server capability
+ connect: add function to parse multiple v1 capability values
+ remote: advertise the object-format capability on the server side
+ wrapper: add function to compare strings with different NUL termination
+ connect: have ref processing code take struct packet_reader
+ Documentation: document v1 protocol object-format capability
+ t1050: match object ID paths in a hash-insensitive way
(this branch is used by bc/sha-256-cvs-svn-updates.)

A misdesigned strbuf_write_fd() function has been retired.
SHA-256 migration work continues.


* sk/diff-files-show-i-t-a-as-new (2020-06-22) 1 commit
(merged to 'next' on 2020-06-22 at 825a823416)
+ diff-files: treat "i-t-a" files as "not-in-index"
(this branch is used by js/diff-files-i-t-a-fix-for-difftool.)
* cb/is-descendant-of (2020-06-23) 1 commit
(merged to 'next' on 2020-06-25 at ca0eaddf5e)
+ commit-reach: avoid is_descendant_of() shim

"git diff-files" has been taught to say paths that are marked as
intent-to-add are new files, not modified from an empty blob.
Code clean-up.


* xl/upgrade-repo-format (2020-06-05) 4 commits
(merged to 'next' on 2020-06-19 at 02bf7a9d8c)
+ check_repository_format_gently(): refuse extensions for old repositories
+ sparse-checkout: upgrade repository to version 1 when enabling extension
+ fetch: allow adding a filter after initial clone
+ repository: add a helper function to perform repository format upgrade
* dl/test-must-fail-fixes-5 (2020-06-24) 4 commits
(merged to 'next' on 2020-06-29 at efe53a7588)
+ lib-submodule-update: pass 'test_must_fail' as an argument
+ lib-submodule-update: prepend "git" to $command
+ lib-submodule-update: consolidate --recurse-submodules
+ lib-submodule-update: add space after function name

Allow runtime upgrade of the repository format version, which needs
to be done carefully.
The effort to avoid using test_must_fail on non-git command continues.

There is a rather unpleasant backward compatibility worry with the
last step of this series, but it is the right thing to do in the
longer term.

* en/sparse-status (2020-06-22) 3 commits
(merged to 'next' on 2020-06-25 at 404403a075)
+ git-prompt: include sparsity state as well
+ git-prompt: document how in-progress operations affect the prompt
+ wt-status: show sparse checkout status as well

"git status" learned to report the status of sparse checkout.


* es/get-worktrees-unsort (2020-06-22) 2 commits
(merged to 'next' on 2020-06-25 at 732d93a36d)
+ worktree: drop get_worktrees() unused 'flags' argument
+ worktree: drop get_worktrees() special-purpose sorting option

API cleanup for get_worktrees()


* es/worktree-code-cleanup (2020-06-24) 1 commit
(merged to 'next' on 2020-06-29 at 91ffd85a31)
+ worktree: avoid dead-code in conditional

Code cleanup.


* jk/fast-export-anonym-alt (2020-06-25) 11 commits
(merged to 'next' on 2020-06-29 at 8a8d83e2ca)
+ fast-export: use local array to store anonymized oid
+ fast-export: anonymize "master" refname
+ fast-export: allow seeding the anonymized mapping
+ fast-export: add a "data" callback parameter to anonymize_str()
+ fast-export: move global "idents" anonymize hashmap into function
+ fast-export: use a flex array to store anonymized entries
+ fast-export: stop storing lengths in anonymized hashmaps
+ fast-export: tighten anonymize_mem() interface to handle only strings
+ fast-export: store anonymized oids as hex strings
+ fast-export: use xmemdupz() for anonymizing oids
+ t9351: derive anonymized tree checks from original repo

"git fast-export --anonymize" learned to take customized mapping to
allow its users to tweak its output more usable for debugging.


* jl/complete-git-prune (2020-06-22) 1 commit
(merged to 'next' on 2020-06-25 at 64f30b8b41)
+ bash-completion: add git-prune into bash completion

Add "git prune" to the completion (in contrib/), which could be
typed by end-users from the command line.


* js/default-branch-name (2020-06-30) 10 commits
(merged to 'next' on 2020-07-01 at c38d766581)
+ contrib: subtree: adjust test to change in fmt-merge-msg
(merged to 'next' on 2020-06-25 at 8f962f9219)
+ testsvn: respect `init.defaultBranch`
+ remote: use the configured default branch name when appropriate
+ clone: use configured default branch name when appropriate
+ init: allow setting the default for the initial branch name via the config
+ init: allow specifying the initial branch name for the new repository
+ docs: add missing diamond brackets
+ submodule: fall back to remote's HEAD for missing remote.<name>.branch
+ send-pack/transport-helper: avoid mentioning a particular branch
+ fmt-merge-msg: stop treating `master` specially

The name of the primary branch in existing repositories, and the
default name used for the first branch in newly created
repositories, is made configurable, so that we can eventually wean
ourselves off of the hardcoded 'master'.


* js/diff-files-i-t-a-fix-for-difftool (2020-07-01) 2 commits
(merged to 'next' on 2020-07-01 at cf5d18635c)
+ difftool -d: ensure that intent-to-add files are handled correctly
+ diff-files --raw: show correct post-image of intent-to-add files

"git difftool" has trouble dealing with paths added to the index
with the intent-to-add bit.


* js/pu-to-seen (2020-06-25) 3 commits
(merged to 'next' on 2020-06-25 at 06c9e5a885)
+ tests: reference `seen` wherever `pu` was referenced
+ docs: adjust the technical overview for the rename `pu` -> `seen`
+ docs: adjust for the recent rename of `pu` to `seen`

The documentation and some tests have been adjusted for the recent
renaming of "pu" branch to "seen".


* mk/pb-pretty-email-without-domain-part-fix (2020-06-23) 1 commit
(merged to 'next' on 2020-06-25 at 81a3aca46b)
+ doc: fix author vs. committer copy/paste error

Docfix.


* ps/ref-transaction-hook (2020-06-19) 1 commit
(merged to 'next' on 2020-06-22 at 3a23dcdbdc)
+ refs: implement reference transaction hook

A new hook.


* rs/pack-bits-in-object-better (2020-06-24) 1 commit
(merged to 'next' on 2020-06-25 at b3cb296341)
+ revision: reallocate TOPO_WALK object flags

By renumbering object flag bits, "struct object" managed to lose
bloated inter-field padding.

--------------------------------------------------
[New Topics]

* mt/hash-to-hex-thread-safety (2020-06-26) 2 commits
- hex: make hash_to_hex_algop() and friends thread-safe
- compat/win32/pthread: add pthread_once()
* bw/fail-cloning-into-non-empty (2020-07-06) 1 commit
- git clone: don't clone into non-empty directory

hash_to_hex() used a set of rotating static buffers, which was not
safe to use in a threaded environment. This has been made safer by
using thread-local storage.
"git clone --separate-git-dir=$elsewhere" used to stomp on the
contents of the existing directory $elsewhere, which has been
taught to fail when $elsewhere is not an empty directory.

Will merge to 'next'.
Expecting a reroll.
with improved commit log message.
cf. <xmqqv9j08dxo.fsf@gitster.c.googlers.com>


* cc/cat-file-usage-update (2020-07-01) 1 commit
(merged to 'next' on 2020-07-06 at 270769a009)
+ cat-file: add missing [=<format>] to usage/synopsis

Doc/usage update.

Will merge to 'master'.


* cc/pretty-contents-size (2020-07-06) 2 commits
- ref-filter: add support for %(contents:size)
- Documentation: clarify %(contents:XXXX) doc

"git for-each-ref --format=<>" learned %(contents:size).

Expecting a reroll.
with clarified semantics and tests with various object types
cf. <xmqq5zb09v4e.fsf@gitster.c.googlers.com>


* ls/mergetool-meld-auto-merge (2020-07-06) 1 commit
- Support auto-merge for meld to follow the vim-diff behavior

The 'meld' backend of the "git mergetool" learned to give the
underlying 'meld' the '--auto-merge' option, which would help
reduce the amount of text that requires manual merging.

Expecting a reroll.
with final fixes and readability improvements.
cf. <xmqqzh8c8eda.fsf@gitster.c.googlers.com>


* pb/log-rev-list-doc (2020-07-06) 4 commits
- rev-list-description.txt: fix Asciidoc syntax
- git-log.txt: include rev-list-description.txt
- git-rev-list.txt: move description to separate file
- git-log.txt: add links to 'rev-list' and 'diff' docs

"git help log" has been enhanced by sharing more material from the
documentation for the underlying "git rev-list" command.

Expecting a reroll.
with reordering the last one to make it preparatory clean-up.
cf. <xmqqimf087pq.fsf@gitster.c.googlers.com>
cf. <xmqqeepo87hz.fsf@gitster.c.googlers.com>


* rs/line-log-until (2020-07-06) 1 commit
(merged to 'next' on 2020-07-06 at 84d6bc67fa)
+ revision: disable min_age optimization with line-log

"git log -Lx,y:path --before=date" lost track of where the range
should be because it didn't take the changes made by the youngest
commits that are omitted from the output into account.

Will merge to 'master'.


* ta/wait-on-aliased-commands-upon-signal (2020-07-06) 2 commits
- Wait for child on signal death for aliases to externals
- Wait for child on signal death for aliases to builtins

When an aliased command, whose output is piped to a pager by git,
gets killed by a signal, the pager got into a funny state, which
has been corrected (again).

Expecting a reroll.
with improved log messages.
cf. <20200706211403.GB85133@coredump.intra.peff.net>


* tb/upload-pack-filters (2020-07-06) 4 commits
- upload-pack.c: introduce 'uploadpack.filter.tree.maxDepth'
- upload-pack.c: pass 'struct list_objects_filter_options *'
- upload-pack.c: allow banning certain object filter(s)
- list_objects_filter_options: introduce 'list_object_filter_config_name'

The component to respond to "git fetch" request is made more
configurable to selectively allow or reject object filtering
specification used for partial cloning.

Waiting for reviews.
cf. <cover.1593720075.git.me@ttaylorr.com>


* vs/completion-with-set-u (2020-07-01) 1 commit
(merged to 'next' on 2020-07-06 at 72b1eca511)
+ completion: nounset mode fixes

The command line completion support (in contrib/) used to be
prepared to work with "set -u" but recent changes got a bit more
sloppy. This has been corrected.

Will merge to 'master'.

--------------------------------------------------
[Stalled]
@ -139,76 +400,16 @@ repositories listed at
--------------------------------------------------
[Cooking]

* bc/http-push-flagsfix (2020-06-23) 1 commit
(merged to 'next' on 2020-06-25 at 1dabb1f61b)
+ http-push: ensure unforced pushes fail when data would be lost
* mt/hash-to-hex-thread-safety (2020-06-26) 2 commits
- hex: make hash_to_hex_algop() and friends thread-safe
- compat/win32/pthread: add pthread_once()

The code to push changes over "dumb" HTTP had a bad interaction
with the commit reachability code due to incorrect allocation of
object flag bits, which has been corrected.
hash_to_hex() used a set of rotating static buffers, which was not
safe to use in a threaded environment. This has been made safer by
using thread-local storage.

Will merge to 'master'.


* cb/is-descendant-of (2020-06-23) 1 commit
(merged to 'next' on 2020-06-25 at ca0eaddf5e)
+ commit-reach: avoid is_descendant_of() shim

Code clean-up.

Will merge to 'master'.


* jk/fast-export-anonym-alt (2020-06-25) 11 commits
(merged to 'next' on 2020-06-29 at 8a8d83e2ca)
+ fast-export: use local array to store anonymized oid
+ fast-export: anonymize "master" refname
+ fast-export: allow seeding the anonymized mapping
+ fast-export: add a "data" callback parameter to anonymize_str()
+ fast-export: move global "idents" anonymize hashmap into function
+ fast-export: use a flex array to store anonymized entries
+ fast-export: stop storing lengths in anonymized hashmaps
+ fast-export: tighten anonymize_mem() interface to handle only strings
+ fast-export: store anonymized oids as hex strings
+ fast-export: use xmemdupz() for anonymizing oids
+ t9351: derive anonymized tree checks from original repo

"git fast-export --anonymize" learned to take customized mapping to
allow its users to tweak its output more usable for debugging.

Will merge to 'master'.


* js/diff-files-i-t-a-fix-for-difftool (2020-06-25) 2 commits
(merged to 'next' on 2020-06-29 at a9fcdabb3b)
+ difftool -d: ensure that intent-to-add files are handled correctly
+ diff-files --raw: show correct post-image of intent-to-add files

"git difftool" has trouble dealing with paths added to the index
with the intent-to-add bit.

Will merge to 'master'.


* js/pu-to-seen (2020-06-25) 3 commits
(merged to 'next' on 2020-06-25 at 06c9e5a885)
+ tests: reference `seen` wherever `pu` was referenced
+ docs: adjust the technical overview for the rename `pu` -> `seen`
+ docs: adjust for the recent rename of `pu` to `seen`

The documentation and some tests have been adjusted for the recent
renaming of "pu" branch to "seen".

Will merge to 'master'.


* mk/pb-pretty-email-without-domain-part-fix (2020-06-23) 1 commit
(merged to 'next' on 2020-06-25 at 81a3aca46b)
+ doc: fix author vs. committer copy/paste error

Docfix.

Will merge to 'master'.
Expecting a reroll.
cf. <CAHd-oW6A2aBHg80R9kyifvF7thwzam5EYYoN9d2TaBcHJrcKWw@mail.gmail.com>


* mf/submodule-summary-with-correct-repository (2020-06-24) 2 commits
@ -222,136 +423,34 @@ repositories listed at
Needs tests.


* rs/pack-bits-in-object-better (2020-06-24) 1 commit
(merged to 'next' on 2020-06-25 at b3cb296341)
+ revision: reallocate TOPO_WALK object flags

By renumbering object flag bits, "struct object" managed to lose
bloated inter-field padding.

Will merge to 'master'.


* es/worktree-code-cleanup (2020-06-24) 1 commit
(merged to 'next' on 2020-06-29 at 91ffd85a31)
+ worktree: avoid dead-code in conditional

Code cleanup.

Will merge to 'master'.


* ra/send-email-in-reply-to-from-command-line-wins (2020-06-29) 1 commit
- send-email: restore --in-reply-to superseding behavior
* ra/send-email-in-reply-to-from-command-line-wins (2020-07-01) 1 commit
(merged to 'next' on 2020-07-06 at 3892a1ab88)
+ send-email: restore --in-reply-to superseding behavior

"git send-email --in-reply-to=<msg>" did not use the In-Reply-To:
header with the value given from the command line, and let it be
overridden by the value on In-Reply-To: header in the messages
being sent out (if exists).

Expecting a reroll/redesign.
Does not behave sensibly for a multi-patch series.


* en/sparse-status (2020-06-22) 3 commits
(merged to 'next' on 2020-06-25 at 404403a075)
+ git-prompt: include sparsity state as well
+ git-prompt: document how in-progress operations affect the prompt
+ wt-status: show sparse checkout status as well

"git status" learned to report the status of sparse checkout.

Will merge to 'master'.


* ps/ref-transaction-hook (2020-06-19) 1 commit
(merged to 'next' on 2020-06-22 at 3a23dcdbdc)
+ refs: implement reference transaction hook

A new hook.

Will merge to 'master'.


* bc/sha-256-cvs-svn-updates (2020-06-22) 14 commits
(merged to 'next' on 2020-06-25 at e0d1c87fcf)
+ git-cvsexportcommit: port to SHA-256
+ git-cvsimport: port to SHA-256
+ git-cvsserver: port to SHA-256
+ git-svn: set the OID length based on hash algorithm
+ perl: make SVN code hash independent
+ perl: make Git::IndexInfo work with SHA-256
+ perl: create and switch variables for hash constants
+ t/lib-git-svn: make hash size independent
+ t9101: make hash independent
+ t9104: make hash size independent
+ t9100: make test work with SHA-256
+ t9108: make test hash independent
+ t9168: make test hash independent
+ t9109: make test hash independent
(this branch uses bc/sha-256-part-2; is tangled with hn/reftable.)

CVS/SVN interface have been prepared for SHA-256 transition

Will merge to 'master'.


* ds/commit-graph-bloom-updates (2020-06-26) 10 commits
- commit-graph: check all leading directories in changed path Bloom filters
- revision: empty pathspecs should not use Bloom filters
- revision.c: fix whitespace
- commit-graph: check chunk sizes after writing
- commit-graph: simplify chunk writes into loop
- commit-graph: unify the signatures of all write_graph_chunk_*() functions
- commit-graph: persist existence of changed-paths
- bloom: fix logic in get_bloom_filter()
- commit-graph: change test to die on parse, not load
- commit-graph: place bloom_settings in context
* ds/commit-graph-bloom-updates (2020-07-01) 10 commits
(merged to 'next' on 2020-07-06 at 177e6b362e)
+ commit-graph: check all leading directories in changed path Bloom filters
+ revision: empty pathspecs should not use Bloom filters
+ revision.c: fix whitespace
+ commit-graph: check chunk sizes after writing
+ commit-graph: simplify chunk writes into loop
+ commit-graph: unify the signatures of all write_graph_chunk_*() functions
+ commit-graph: persist existence of changed-paths
+ bloom: fix logic in get_bloom_filter()
+ commit-graph: change test to die on parse, not load
+ commit-graph: place bloom_settings in context
(this branch uses sg/commit-graph-cleanups.)

Updates to the changed-paths bloom filter.

Will merge to 'next'.


* es/get-worktrees-unsort (2020-06-22) 2 commits
(merged to 'next' on 2020-06-25 at 732d93a36d)
+ worktree: drop get_worktrees() unused 'flags' argument
+ worktree: drop get_worktrees() special-purpose sorting option

API cleanup for get_worktrees()

Will merge to 'master'.


* jl/complete-git-prune (2020-06-22) 1 commit
(merged to 'next' on 2020-06-25 at 64f30b8b41)
+ bash-completion: add git-prune into bash completion

Add "git prune" to the completion (in contrib/), which could be
typed by end-users from the command line.

Will merge to 'master'.


* js/default-branch-name (2020-06-24) 9 commits
(merged to 'next' on 2020-06-25 at 8f962f9219)
+ testsvn: respect `init.defaultBranch`
+ remote: use the configured default branch name when appropriate
+ clone: use configured default branch name when appropriate
+ init: allow setting the default for the initial branch name via the config
+ init: allow specifying the initial branch name for the new repository
+ docs: add missing diamond brackets
+ submodule: fall back to remote's HEAD for missing remote.<name>.branch
+ send-pack/transport-helper: avoid mentioning a particular branch
+ fmt-merge-msg: stop treating `master` specially
(this branch is used by hn/reftable.)

The name of the primary branch in existing repositories, and the
default name used for the first branch in newly created
repositories, is made configurable, so that we can eventually wean
ourselves off of the hardcoded 'master'.

Will merge to 'master'.


@ -370,42 +469,17 @@ repositories listed at
Waiting for a (hopefully final) review.


* ak/commit-graph-to-slab (2020-06-17) 4 commits
(merged to 'next' on 2020-06-25 at 9a10ae18d3)
+ commit-graph: minimize commit_graph_data_slab access
+ commit: move members graph_pos, generation to a slab
+ commit-graph: introduce commit_graph_data_slab
+ object: drop parsed_object_pool->commit_count

A few fields in "struct commit" that do not have to always be
present have been moved to commit slabs.

Will merge to 'master'.


* dl/test-must-fail-fixes-5 (2020-06-24) 4 commits
(merged to 'next' on 2020-06-29 at efe53a7588)
+ lib-submodule-update: pass 'test_must_fail' as an argument
+ lib-submodule-update: prepend "git" to $command
+ lib-submodule-update: consolidate --recurse-submodules
+ lib-submodule-update: add space after function name

The effort to avoid using test_must_fail on non-git command continues.

Will merge to 'master'.


* sg/commit-graph-cleanups (2020-06-08) 10 commits
- commit-graph: simplify write_commit_graph_file() #2
- commit-graph: simplify write_commit_graph_file() #1
- commit-graph: simplify parse_commit_graph() #2
- commit-graph: simplify parse_commit_graph() #1
- commit-graph: clean up #includes
- diff.h: drop diff_tree_oid() & friends' return value
- commit-slab: add a function to deep free entries on the slab
- commit-graph-format.txt: all multi-byte numbers are in network byte order
- commit-graph: fix parsing the Chunk Lookup table
- tree-walk.c: don't match submodule entries for 'submod/anything'
+ commit-graph: simplify write_commit_graph_file() #2
+ commit-graph: simplify write_commit_graph_file() #1
+ commit-graph: simplify parse_commit_graph() #2
+ commit-graph: simplify parse_commit_graph() #1
+ commit-graph: clean up #includes
+ diff.h: drop diff_tree_oid() & friends' return value
+ commit-slab: add a function to deep free entries on the slab
+ commit-graph-format.txt: all multi-byte numbers are in network byte order
+ commit-graph: fix parsing the Chunk Lookup table
+ tree-walk.c: don't match submodule entries for 'submod/anything'
(this branch is used by ds/commit-graph-bloom-updates.)

The changed-path Bloom filter is improved using ideas from an
@ -455,59 +529,6 @@ repositories listed at
cf. <CABPp-BGdEyEeajYZj_rdxp=MyEQdszuyjVTax=hhYj3fOtRQUQ@mail.gmail.com>


* bc/sha-256-part-2 (2020-06-19) 44 commits
(merged to 'next' on 2020-06-22 at dc153f366d)
+ remote-testgit: adapt for object-format
+ bundle: detect hash algorithm when reading refs
+ t5300: pass --object-format to git index-pack
+ t5704: send object-format capability with SHA-256
+ t5703: use object-format serve option
+ t5702: offer an object-format capability in the test
+ t/helper: initialize the repository for test-sha1-array
+ remote-curl: avoid truncating refs with ls-remote
+ t1050: pass algorithm to index-pack when outside repo
+ builtin/index-pack: add option to specify hash algorithm
+ remote-curl: detect algorithm for dumb HTTP by size
+ builtin/ls-remote: initialize repository based on fetch
+ t5500: make hash independent
+ serve: advertise object-format capability for protocol v2
+ connect: parse v2 refs with correct hash algorithm
+ connect: pass full packet reader when parsing v2 refs
+ Documentation/technical: document object-format for protocol v2
+ t1302: expect repo format version 1 for SHA-256
+ builtin/show-index: provide options to determine hash algo
+ t5302: modernize test formatting
+ packfile: compute and use the index CRC offset
+ t3200: mark assertion with SHA1 prerequisite
+ setup: set the_repository's hash algo when checking format
+ fetch-pack: parse and advertise the object-format capability
+ t5562: pass object-format in synthesized test data
+ builtin/clone: initialize hash algorithm properly
+ remote-curl: implement object-format extensions
+ transport-helper: implement object-format extensions
+ docs: update remote helper docs for object-format extensions
+ builtin/receive-pack: detect when the server doesn't support our hash
+ connect: detect algorithm when fetching refs
+ fetch-pack: detect when the server doesn't support our hash
+ connect: make parse_feature_value extern
+ send-pack: detect when the server doesn't support our hash
+ connect: add function to detect supported v1 hash functions
+ transport: add a hash algorithm member
+ pkt-line: add a member for hash algorithm
+ connect: add function to fetch value of a v2 server capability
+ connect: add function to parse multiple v1 capability values
+ remote: advertise the object-format capability on the server side
+ wrapper: add function to compare strings with different NUL termination
+ connect: have ref processing code take struct packet_reader
+ Documentation: document v1 protocol object-format capability
+ t1050: match object ID paths in a hash-insensitive way
(this branch is used by bc/sha-256-cvs-svn-updates and hn/reftable.)

SHA-256 migration work continues.

Will merge to 'master'.


* jx/proc-receive-hook (2020-05-18) 11 commits
- doc: add documentation for the proc-receive hook
- transport: parse report options for tracking refs
@ -527,36 +548,20 @@ repositories listed at
Needs review.


* hn/reftable (2020-06-29) 23 commits
- fixup! Reftable support for git-core
- Add "test-tool dump-reftable" command.
- Add reftable testing infrastructure
- git-prompt: prepare for reftable refs backend
- vcxproj: adjust for the reftable changes
- Add GIT_DEBUG_REFS debugging mechanism
- Hookup unittests for the reftable library.
- Reftable support for git-core
- Add standalone build infrastructure for reftable
- Add reftable library
- Add .gitattributes for the reftable/ directory
- Iterate over the "refs/" namespace in for_each_[raw]ref
- Move REF_LOG_ONLY to refs-internal.h
- Treat REVERT_HEAD as a pseudo ref
- Treat CHERRY_PICK_HEAD as a pseudo ref
* hn/reftable (2020-07-06) 4 commits
- Treat BISECT_HEAD as a pseudo ref
- Make refs_ref_exists public
- Write pseudorefs through ref backends.
- checkout: add '\n' to reflog message
- t3432: use git-reflog to inspect the reflog for HEAD
- lib-t6000.sh: write tag using git-update-ref
- Merge branch 'bc/sha-256-part-2' into HEAD
- Merge branch 'js/default-branch-name' into HEAD
(this branch uses bc/sha-256-part-2 and js/default-branch-name; is tangled with bc/sha-256-cvs-svn-updates.)

A new refs backend "reftable" to replace the traditional
combination of packed-refs files and one-file-per-ref loose refs
has been implemented and integrated for improved performance and
atomicity.
Preliminary clean-up of the refs API in preparation for adding a
new refs backend "reftable".

Expecting a reroll.
The second one should be dropped, and possibly replaced with a
patch that moves message normalization from backends to the more
generic layer.
cf. <xmqqmu4ca31g.fsf@gitster.c.googlers.com>

--------------------------------------------------
[Discarded]