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What's cooking (2018/05 #01)

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Junio C Hamano 2018-05-07 23:57:03 +09:00
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@ -1,10 +1,10 @@
To: git@vger.kernel.org
Bcc: lwn@lwn.net
Subject: What's cooking in git.git (Apr 2018, #04; Mon, 30)
Subject: What's cooking in git.git (May 2018, #01; Mon, 7)
X-master-at: 1f1cddd558b54bb0ce19c8ace353fd07b758510d
X-next-at: 4582c99ba8a159afafa295e51d1d3387967af0a0
X-next-at: d54016d9e3a3ac00b0483d3779ff96f3882b7094
What's cooking in git.git (Apr 2018, #04; Mon, 30)
What's cooking in git.git (May 2018, #01; Mon, 7)
--------------------------------------------------
Here are the topics that have been cooking. Commits prefixed with
@ -20,26 +20,318 @@ of the repositories listed at
--------------------------------------------------
[New Topics]
* cc/perf-aggregate-unknown-option (2018-04-26) 1 commit
- perf/aggregate: use Getopt::Long for option parsing
* tb/test-apfs-utf8-normalization (2018-05-02) 1 commit
- test: correct detection of UTF8_NFD_TO_NFC for APFS
Perf-test helper updates.
A test to see if the filesystem normalizes UTF-8 filename has been
updated to check what we need to know in a more direct way, i.e. a
path created in NFC form can be accessed with NFD form (or vice
versa) to cope with APFS as well as HFS.
Will merge to 'next'.
* ab/perl-python-attrs (2018-04-27) 3 commits
- .gitattributes: add a diff driver for Python
- .gitattributes: use the "perl" differ for Perl
- .gitattributes: add *.pl extension for Perl
* ab/get-short-oid (2018-05-02) 12 commits
- get_short_oid: document & warn if we ignore the type selector
- config doc: document core.disambiguate
- get_short_oid / peel_onion: ^{commit} should be commit, not committish
- get_short_oid / peel_onion: ^{tree} should be tree, not treeish
- get_short_oid: learn to disambiguate by ^{blob}
- get_short_oid: learn to disambiguate by ^{tag}
- get_short_oid: sort ambiguous objects by type, then SHA-1
- sha1-name.c: move around the collect_ambiguous() function
- cache.h: add comment explaining the order in object_type
- git-p4: change "commitish" typo to "committish"
- sha1-array.h: align function arguments
- sha1-name.c: remove stray newline
We learned that our source files with ".pl" and ".py" extensions
are Perl and Python files respectively and changes to them are
better viewed as such with appropriate diff drivers.
* ah/misc-doc-updates (2018-05-06) 7 commits
- doc: normalize [--options] to [options] in git-diff
- doc: add note about shell quoting to revision.txt
- git-svn: remove ''--add-author-from' for 'commit-diff'
- doc: add '-d' and '-o' for 'git push'
- doc: clarify ignore rules for git ls-files
- doc: align 'diff --no-index' in text and synopsis
- doc: improve formatting in githooks.txt
Misc doc fixes.
Will merge to 'next'.
* bc/format-patch-cover-no-attach (2018-05-02) 1 commit
- format-patch: make cover letters always text/plain
"git format-patch --cover --attach" created a broken MIME multipart
message for the cover letter, which has been fixed by keeping the
cover letter as plain text file.
Will merge to 'next'.
* bp/test-drop-caches (2018-05-04) 1 commit
- test-drop-caches: simplify delay loading of NtSetSystemInformation
Code simplification.
Will merge to 'next'.
* cc/perf-bisect (2018-05-06) 1 commit
- perf/bisect_run_script: disable codespeed
Performance test updates.
Will merge to 'next'.
* cf/submodule-progress-dissociate (2018-05-04) 3 commits
- submodule: add --dissociate option to add/update commands
- submodule: add --progress option to add command
- submodule: clean up subsititions in script
"git submodule update" and "git submodule add" supported the
"--reference" option to borrow objects from a neighbouring local
repository like "git clone" does, but lacked the more recent
invention "--dissociate". Also "git submodule add" has been taught
to take the "--progress" option.
Is this ready for 'next'? Should "git submodule -h" list the new
options in its short help?
* dd/send-email-reedit (2018-05-06) 1 commit
- git-send-email: allow re-editing of message
"git send-email" can sometimes offer confirmation dialog "Send this
email?" with choices 'Yes', 'No', 'Quit', and 'All'. A new action
'Edit' has been added to this dialog's choice.
Waiting briefly for an ack or two.
cf. <xmqq4ljlsahj.fsf@gitster-ct.c.googlers.com>
* em/status-rename-config (2018-05-06) 1 commit
- wt-status: use settings from git_diff_ui_config
"git status" learned to pay attention to UI related diff
configuration variables such as diff.renames.
Will merge to 'next'.
* jm/cache-entry-from-mem-pool (2018-05-02) 5 commits
- block alloc: add validations around cache_entry lifecyle
- block alloc: allocate cache entries from mem_pool
- mem-pool: fill out functionality
- block alloc: add lifecycle APIs for cache_entry structs
- read-cache: teach refresh_cache_entry() to take istate
For a large tree, the index needs to hold many cache entries
allocated on heap. These cache entries are now allocated out of a
dedicated memory pool to amortize malloc(3) overhead.
Needs review.
Is the "caller always knows which pool an entry came from and calls
the right kind of free" a feasible approach?
* js/branch-diff (2018-05-06) 18 commits
- completion: support branch-diff
- branch-diff: add a man page
- branch-diff --dual-color: work around bogus white-space warning
- branch-diff: offer to dual-color the diffs
- diff: add an internal option to dual-color diffs of diffs
- color: provide inverted colors, too
- branch-diff: use color for the commit pairs
- branch-diff: add tests
- branch-diff: do not show "function names" in hunk headers
- branch-diff: adjust the output of the commit pairs
- branch-diff: suppress the diff headers
- branch-diff: indent the diffs just like tbdiff
- branch-diff: right-trim commit messages
- branch-diff: also show the diff between patches
- branch-diff: improve the order of the shown commits
- branch-diff: first rudimentary implementation
- Add a new builtin: branch-diff
- Add a function to solve least-cost assignment problems
"git tbdiff" that lets us compare individual patches in two
iterations of a topic has been rewritten and made into a built-in
command.
Expecting a reroll.
cf. <nycvar.QRO.7.76.6.1805052351560.77@tvgsbejvaqbjf.bet>
* js/sequencer-and-root-commits (2018-05-06) 6 commits
- rebase --rebase-merges: root commits can be cousins, too
- rebase --rebase-merges: a "merge" into a new root is a fast-forward
- sequencer: allow introducing new root commits
- rebase -i --root: let the sequencer handle even the initial part
- sequencer: learn about the special "fake root commit" handling
- sequencer: extract helper to update active_cache_tree
(this branch uses js/rebase-recreate-merge.)
The implementation of "git rebase -i --root" has been updaed to use
the sequencer machinery more.
Will merge to 'next'.
* js/use-bug-macro (2018-05-06) 4 commits
- Convert remaining die*(BUG) messages
- Replace all die("BUG: ...") calls by BUG() ones
- run-command: use BUG() to report bugs, not die()
- test-tool: help verifying BUG() code paths
* jt/partial-clone-proto-v2 (2018-05-06) 4 commits
- {fetch,upload}-pack: support filter in protocol v2
- upload-pack: read config when serving protocol v2
- upload-pack: fix error message typo
- Merge branch 'bw/protocol-v2' into jt/partial-clone-proto-v2
(this branch uses bw/protocol-v2; is tangled with bw/server-options.)
Transfer protocol v2 learned to support the partial clone.
Will merge to 'next'.
* ma/doc-expand-tabs (2018-05-02) 1 commit
- revisions.txt: expand tabs to spaces in diagram
Fix one instance of asciidoctor's misformatting by expanding a tab
into spaces in a literal block.
Will discard. This approach is less maintainable than the approach
taken by bc/asciidoctor-tab-width topic.
* nd/completion-aliasfiletype-typofix (2018-05-06) 1 commit
- completion: fix misspelled config key aliasesfiletype
Typofix.
Will merge to 'next'.
* nd/doc-header (2018-05-02) 1 commit
- doc: keep first level section header in upper case
Doc formatting fix.
Will merge to 'next'.
* nd/pack-unreachable-objects-doc (2018-05-06) 1 commit
- pack-objects: validation and documentation about unreachable options
Doc update.
Will merge to 'next'.
* sb/object-store-alloc (2018-05-02) 14 commits
- alloc.c: include alloc.h
- alloc: allow arbitrary repositories for alloc functions
- object: allow create_object to handle arbitrary repositories
- object: allow grow_object_hash to handle arbitrary repositories
- alloc: add repository argument to alloc_commit_index
- alloc: add repository argument to alloc_report
- alloc: add repository argument to alloc_object_node
- alloc: add repository argument to alloc_tag_node
- alloc: add repository argument to alloc_commit_node
- alloc: add repository argument to alloc_tree_node
- alloc: add repository argument to alloc_blob_node
- object: add repository argument to grow_object_hash
- object: add repository argument to create_object
- repository: introduce object parser field
(this branch uses sb/object-store-replace and sb/oid-object-info.)
The conversion to pass "the_repository" and then "a_repository"
throughout the object access API continues.
* tb/grep-column (2018-05-06) 7 commits
- contrib/git-jump/git-jump: jump to match column in addition to line
- grep.c: add configuration variables to show matched option
- builtin/grep.c: add '--column' option to 'git-grep(1)'
- grep.c: display column number of first match
- grep.[ch]: extend grep_opt to allow showing matched column
- grep.c: expose matched column in match_line()
- Documentation/config.txt: camel-case lineNumber for consistency
"git grep" learned the "--column" option that gives not just the
line number but the column number of the hit.
* bc/asciidoctor-tab-width (2018-05-07) 2 commits
- Documentation: render revisions correctly under Asciidoctor
- Documentation: use 8-space tabs with Asciidoctor
Asciidoctor gives a reasonable imitation for AsciiDoc, but does not
render illustration in a literal block correctly when indented with
HT by default. The problem is fixed by forcing 8-space tabs.
Will merge to 'next'.
* bc/mailmap-self (2018-05-07) 1 commit
- mailmap: update brian m. carlson's email address
Will merge to 'next'.
--------------------------------------------------
[Stalled]
* pc/submodule-helper-foreach (2018-02-02) 5 commits
- submodule: port submodule subcommand 'foreach' from shell to C
- submodule foreach: document variable '$displaypath'
- submodule foreach: clarify the '$toplevel' variable documentation
- submodule foreach: document '$sm_path' instead of '$path'
- submodule foreach: correct '$path' in nested submodules from a subdirectory
Expecting a response to review comments
e.g. cf. <20180206150044.1bffbb573c088d38c8e44bf5@google.com>
* pw/add-p-select (2018-03-16) 3 commits
- add -p: optimize line selection for short hunks
- add -p: allow line selection to be inverted
- add -p: select individual hunk lines
"git add -p" interactive interface learned to let users choose
individual added/removed lines to be used in the operation, instead
of accepting or rejecting a whole hunk.
Expecting a reroll to reignite the discussion.
cf. <9895c7b7-eac4-28c1-90c6-443acd1131b7@talktalk.net>
* jh/json-writer (2018-03-28) 1 commit
- json_writer: new routines to create data in JSON format
Preparatory code to later add json output for unspecified telemetry
data.
We do not add random code that does not have real users to our
codebase, so let's have it wait until such a real code materializes
before too long.
* hn/bisect-first-parent (2018-04-21) 1 commit
- bisect: create 'bisect_flags' parameter in find_bisection()
Preliminary code update to allow passing more flags down the
bisection codepath in the future.
We do not add random code that does not have real users to our
codebase, so let's have it wait until such a real code materializes
before too long.
* is/parsing-line-range (2018-04-27) 2 commits
. log: prevent error if line range ends past end of file
. blame: prevent error if range ends past end of file
@ -50,16 +342,6 @@ of the repositories listed at
Seems to break a few tests.
* js/test-unset-prereq (2018-04-30) 1 commit
- tests: introduce test_unset_prereq, for debugging
Test debugging aid.
Will merge to 'next'.
--------------------------------------------------
[Stalled]
* ld/p4-unshelve (2018-02-22) 1 commit
- git-p4: add unshelve command
@ -142,6 +424,35 @@ of the repositories listed at
--------------------------------------------------
[Cooking]
* cc/perf-aggregate-unknown-option (2018-04-26) 1 commit
- perf/aggregate: use Getopt::Long for option parsing
Perf-test helper updates.
Will merge to 'next'.
* ab/perl-python-attrs (2018-04-27) 3 commits
- .gitattributes: add a diff driver for Python
- .gitattributes: use the "perl" differ for Perl
- .gitattributes: add *.pl extension for Perl
We learned that our source files with ".pl" and ".py" extensions
are Perl and Python files respectively and changes to them are
better viewed as such with appropriate diff drivers.
Will merge to 'next'.
* js/test-unset-prereq (2018-04-30) 1 commit
- tests: introduce test_unset_prereq, for debugging
Test debugging aid.
Will merge to 'next'.
cf. <20180507115950.3887-1-szeder.dev@gmail.com>
* fg/completion-external (2018-04-30) 1 commit
- completion: load completion file for external subcommand
@ -150,6 +461,9 @@ of the repositories listed at
custom "git-$command" that the end user has on the $PATH when using
newer version of bash.
Will merge to 'next'.
cf. <CAM0VKjkTu+OkLM3gvX73mWugxArCVmqRBmWGHiKuLiLRNkkNow@mail.gmail.com>
* ma/double-dashes-in-docs (2018-04-18) 4 commits
(merged to 'next' on 2018-04-25 at aaac2dc63c)
@ -271,7 +585,7 @@ of the repositories listed at
Will merge to 'next'.
* js/rebase-i-clean-msg-after-fixup-continue (2018-04-30) 4 commits
* js/rebase-i-clean-msg-after-fixup-continue (2018-05-02) 4 commits
- rebase --skip: clean up commit message after a failed fixup/squash
- sequencer: always commit without editing when asked for
- rebase -i: Handle "combination of <n> commits" with GETTEXT_POISON
@ -300,7 +614,7 @@ of the repositories listed at
- ls-remote: send server options when using protocol v2
- serve: introduce the server-option capability
- Merge branch 'bw/protocol-v2' into HEAD
(this branch uses bw/protocol-v2.)
(this branch uses bw/protocol-v2; is tangled with jt/partial-clone-proto-v2.)
The transport protocol v2 is getting updated further.
@ -359,7 +673,7 @@ of the repositories listed at
Will merge to 'master'.
* bc/object-id (2018-04-24) 41 commits
* bc/object-id (2018-05-02) 42 commits
- merge-one-file: compute empty blob object ID
- add--interactive: compute the empty tree value
- Update shell scripts to compute empty tree object ID
@ -376,6 +690,7 @@ of the repositories listed at
- merge: convert empty tree constant to the_hash_algo
- builtin/merge: switch tree functions to use object_id
- builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo
- sha1-file: add functions for hex empty tree and blob OIDs
- builtin/receive-pack: avoid hard-coded constants for push certs
- diff: specify abbreviation size in terms of the_hash_algo
- upload-pack: replace use of several hard-coded constants
@ -395,7 +710,7 @@ of the repositories listed at
- pack-objects: abstract away hash algorithm
- packfile: abstract away hash constant values
- packfile: convert find_pack_entry to object_id
- sha1_file: convert freshen functions to object_id
- sha1-file: convert freshen functions to object_id
- packfile: convert has_sha1_pack to object_id
- packfile: remove unused member from struct pack_entry
- Remove unused member in struct object_context
@ -404,9 +719,6 @@ of the repositories listed at
Conversion from uchar[20] to struct object_id continues.
Expecting a reroll.
cf. <20180426011337.GA722934@genre.crustytoothpaste.net>
* sb/oid-object-info (2018-04-26) 9 commits
- cache.h: allow oid_object_info to handle arbitrary repositories
@ -418,7 +730,7 @@ of the repositories listed at
- packfile: add repository argument to retry_bad_packed_offset
- cache.h: add repository argument to oid_object_info
- cache.h: add repository argument to oid_object_info_extended
(this branch uses sb/object-store-replace.)
(this branch is used by sb/object-store-alloc; uses sb/object-store-replace.)
The codepath around object-info API has been taught to take the
repository object (which in turn tells the API which object store
@ -427,19 +739,21 @@ of the repositories listed at
Will merge to 'next'.
* en/unpack-trees-split-index-fix (2018-04-24) 1 commit
* en/unpack-trees-split-index-fix (2018-05-02) 1 commit
- unpack_trees: fix breakage when o->src_index != o->dst_index
The split-index feature had a long-standing and dormant bug in
certain use of the in-core merge machinery, which has been fixed.
Hold.
cf. <CACsJy8DyP_mXXJKn52Jzqe63N3GLpXePCr8ha97Lv9hr6u-M0w@mail.gmail.com>
Will merge to 'next'.
cf. <CACsJy8CeDhrT9GXe9q5gqsAeq_sSQ8jyF2nMOFxzjwKtE31oPQ@mail.gmail.com>
* bp/merge-rename-config (2018-04-25) 2 commits
- merge: add merge.aggressive config setting
* bp/merge-rename-config (2018-05-04) 3 commits
- merge: pass aggressive when rename detection is turned off
- merge: add merge.renames config setting
- merge: update documentation for {merge,diff}.renameLimit
(this branch uses en/rename-directory-detection-reboot.)
* en/git-debugger (2018-04-25) 1 commit
@ -450,8 +764,8 @@ of the repositories listed at
Will merge to 'next'.
* js/no-pager-shorthand (2018-04-25) 1 commit
- git: add -N as a short option for --no-pager
* js/no-pager-shorthand (2018-05-04) 1 commit
- git: add -P as a short option for --no-pager
"git --no-pager cmd" did not have short-and-sweet single letter
option. Now it does.
@ -501,9 +815,10 @@ of the repositories listed at
Will merge to 'master'.
* ds/generation-numbers (2018-04-26) 10 commits
* ds/generation-numbers (2018-05-02) 11 commits
- commit-graph.txt: update design document
- merge: check config before loading commits
- commit: use generation number in remove_redundant()
- commit: add short-circuit to paint_down_to_common()
- commit: use generation numbers for in_merge_bases()
- ref-filter: use generation number for --contains
@ -518,6 +833,8 @@ of the repositories listed at
pre-computed generation numbers to speed up the decisions to stop
history traversal.
Is this ready for 'next'?
* en/rename-directory-detection-reboot (2018-04-25) 36 commits
- merge-recursive: fix check for skipability of working tree updates
@ -556,9 +873,15 @@ of the repositories listed at
- directory rename detection: testcases to avoid taking detection too far
- directory rename detection: directory splitting testcases
- directory rename detection: basic testcases
(this branch is used by bp/merge-rename-config.)
Reboot of an attempt to detect wholesale directory renames and use
it while merging.
Rename detection logic in "diff" family that is used in "merge" has
learned to guess when all of x/a, x/b and x/c have moved to z/a,
z/b and z/c, it is likely that x/d added in the meantime would also
want to move to z/d by taking the hint that the entire directory
'x' moved to 'z'. Incidentally, this avoids updating a file in the
working tree after a (non-trivial) merge whose result matches what
our side originally had.
Will merge to 'next'.
@ -579,6 +902,8 @@ of the repositories listed at
across a few places in the build procedure, but it now is getting a
bit more consolidated to allow more automation.
Is this ready for 'next'.
* sb/object-store-replace (2018-04-12) 15 commits
(merged to 'next' on 2018-04-25 at 9a213fb505)
@ -597,7 +922,7 @@ of the repositories listed at
+ object-store: move lookup_replace_object to replace-object.h
+ replace-object: move replace_map to object store
+ replace_object: use oidmap
(this branch is used by sb/oid-object-info.)
(this branch is used by sb/object-store-alloc and sb/oid-object-info.)
The effort to pass the repository in-core structure throughout the
API continues. This round deals with the code that implements the
@ -606,17 +931,6 @@ of the repositories listed at
Will merge to 'master'.
* hn/bisect-first-parent (2018-04-21) 1 commit
- bisect: create 'bisect_flags' parameter in find_bisection()
Preliminary code update to allow passing more flags down the
bisection codepath in the future.
We do not add random code that does not have real users to our
codebase, so let's have it wait until such a real code materializes
before too long.
* sg/complete-paths (2018-04-17) 11 commits
- completion: fill COMPREPLY directly when completing paths
- completion: improve handling quoted paths in 'git ls-files's output
@ -655,6 +969,8 @@ of the repositories listed at
and also paint lines in different colors depending on the age of
the commit.
Is this ready for 'next'?
* ab/simplify-perl-makefile (2018-04-19) 2 commits
(merged to 'next' on 2018-04-25 at 906cf21682)
@ -668,7 +984,9 @@ of the repositories listed at
Will merge to 'master'.
* ds/lazy-load-trees (2018-04-11) 5 commits
* ds/lazy-load-trees (2018-05-02) 6 commits
(merged to 'next' on 2018-05-02 at d54016d9e3)
+ coccinelle: avoid wrong transformation suggestions from commit.cocci
(merged to 'next' on 2018-04-25 at b90813f421)
+ commit-graph: lazy-load trees for commits
+ treewide: replace maybe_tree with accessor methods
@ -794,17 +1112,6 @@ of the repositories listed at
Will merge to 'master'.
* jh/json-writer (2018-03-28) 1 commit
- json_writer: new routines to create data in JSON format
Preparatory code to later add json output for unspecified telemetry
data.
We do not add random code that does not have real users to our
codebase, so let's have it wait until such a real code materializes
before too long.
* ot/libify-get-ref-atom-value (2018-03-29) 6 commits
(merged to 'next' on 2018-04-25 at 056bcaa69c)
+ ref-filter: libify get_ref_atom_value()
@ -906,10 +1213,8 @@ of the repositories listed at
while doing its work, and shrinking its size helps the performance
quite a bit.
What's the doneness of this thing? The interdiff since previous
rounds looked reasonable, but I didn't see this round otherwise
scrutinized by reviewers. The numbers given in the commit near the
tip do look impressive, though ;-)
Will merge to 'next'.
cf. <CACsJy8CuVRy4UPEwXJJYAjePEz5zjKMLhRjh9UFw0DPYTzobkw@mail.gmail.com>
* nd/repack-keep-pack (2018-04-16) 7 commits
@ -927,22 +1232,8 @@ of the repositories listed at
marked with ".keep" so that it is left untouched while objects in
other packs and loose ones are repacked.
What's the doneness of this thing? The interdiff since the earlier
one looked reasonable, but I didn't see this round otherwise
scrutinized by reviewers.
* pw/add-p-select (2018-03-16) 3 commits
- add -p: optimize line selection for short hunks
- add -p: allow line selection to be inverted
- add -p: select individual hunk lines
"git add -p" interactive interface learned to let users choose
individual added/removed lines to be used in the operation, instead
of accepting or rejecting a whole hunk.
Expecting a reroll to reignite the discussion.
cf. <9895c7b7-eac4-28c1-90c6-443acd1131b7@talktalk.net>
Will merge to 'next'.
cf. <CACsJy8CuVRy4UPEwXJJYAjePEz5zjKMLhRjh9UFw0DPYTzobkw@mail.gmail.com>
* ds/commit-graph (2018-04-11) 16 commits
@ -971,17 +1262,6 @@ of the repositories listed at
Will merge to 'master'.
* pc/submodule-helper-foreach (2018-02-02) 5 commits
- submodule: port submodule subcommand 'foreach' from shell to C
- submodule foreach: document variable '$displaypath'
- submodule foreach: clarify the '$toplevel' variable documentation
- submodule foreach: document '$sm_path' instead of '$path'
- submodule foreach: correct '$path' in nested submodules from a subdirectory
Expecting a response to review comments
e.g. cf. <20180206150044.1bffbb573c088d38c8e44bf5@google.com>
* tg/worktree-add-existing-branch (2018-04-30) 4 commits
- worktree: teach "add" to check out existing branches
- worktree: factor out dwim_branch function
@ -1011,10 +1291,13 @@ of the repositories listed at
- sequencer: refactor how original todo list lines are accessed
- sequencer: make rearrange_squash() a bit more obvious
- sequencer: avoid using errno clobbered by rollback_lock_file()
(this branch is used by js/sequencer-and-root-commits.)
"git rebase" learned "--rebase-merges" to transplant the whole
topology of commit graph elsewhere.
Will merge to 'next'.
* bw/protocol-v2 (2018-03-15) 35 commits
(merged to 'next' on 2018-04-11 at 23ee234a2c)
@ -1053,7 +1336,7 @@ of the repositories listed at
+ pkt-line: add delim packet support
+ pkt-line: allow peeking a packet line without consuming it
+ pkt-line: introduce packet_read_with_status
(this branch is used by bw/server-options.)
(this branch is used by bw/server-options and jt/partial-clone-proto-v2.)
The beginning of the next-gen transfer protocol.