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Git calls an internal `execute_commands` function to handle commands
sent from client to `git-receive-pack`. Regardless of what references
the user pushes, git creates or updates the corresponding references if
the user has write-permission. A contributor who has no
write-permission, cannot push to the repository directly. So, the
contributor has to write commits to an alternate location, and sends
pull request by emails or by other ways. We call this workflow as a
distributed workflow.
It would be more convenient to work in a centralized workflow like what
Gerrit provided for some cases. For example, a read-only user who
cannot push to a branch directly can run the following `git push`
command to push commits to a pseudo reference (has a prefix "refs/for/",
not "refs/heads/") to create a code review.
git push origin \
HEAD:refs/for/<branch-name>/<session>
The `<branch-name>` in the above example can be as simple as "master",
or a more complicated branch name like "foo/bar". The `<session>` in
the above example command can be the local branch name of the client
side, such as "my/topic".
We cannot implement a centralized workflow elegantly by using
"pre-receive" + "post-receive", because Git will call the internal
function "execute_commands" to create references (even the special
pseudo reference) between these two hooks. Even though we can delete
the temporarily created pseudo reference via the "post-receive" hook,
having a temporary reference is not safe for concurrent pushes.
So, add a filter and a new handler to support this kind of workflow.
The filter will check the prefix of the reference name, and if the
command has a special reference name, the filter will turn a specific
field (`run_proc_receive`) on for the command. Commands with this filed
turned on will be executed by a new handler (a hook named
"proc-receive") instead of the internal `execute_commands` function.
We can use this "proc-receive" command to create pull requests or send
emails for code review.
Suggested by Junio, this "proc-receive" hook reads the commands,
push-options (optional), and send result using a protocol in pkt-line
format. In the following example, the letter "S" stands for
"receive-pack" and letter "H" stands for the hook.
# Version and features negotiation.
S: PKT-LINE(version=1\0push-options atomic...)
S: flush-pkt
H: PKT-LINE(version=1\0push-options...)
H: flush-pkt
# Send commands from server to the hook.
S: PKT-LINE(<old-oid> <new-oid> <ref>)
S: ... ...
S: flush-pkt
# Send push-options only if the 'push-options' feature is enabled.
S: PKT-LINE(push-option)
S: ... ...
S: flush-pkt
# Receive result from the hook.
# OK, run this command successfully.
H: PKT-LINE(ok <ref>)
# NO, I reject it.
H: PKT-LINE(ng <ref> <reason>)
# Fall through, let 'receive-pack' to execute it.
H: PKT-LINE(ok <ref>)
H: PKT-LINE(option fall-through)
# OK, but has an alternate reference. The alternate reference name
# and other status can be given in options
H: PKT-LINE(ok <ref>)
H: PKT-LINE(option refname <refname>)
H: PKT-LINE(option old-oid <old-oid>)
H: PKT-LINE(option new-oid <new-oid>)
H: PKT-LINE(option forced-update)
H: ... ...
H: flush-pkt
After receiving a command, the hook will execute the command, and may
create/update different reference. For example, a command for a pseudo
reference "refs/for/master/topic" may create/update different reference
such as "refs/pull/123/head". The alternate reference name and other
status are given in option lines.
The list of commands returned from "proc-receive" will replace the
relevant commands that are sent from user to "receive-pack", and
"receive-pack" will continue to run the "execute_commands" function and
other routines. Finally, the result of the execution of these commands
will be reported to end user.
The reporting function from "receive-pack" to "send-pack" will be
extended in latter commit just like what the "proc-receive" hook reports
to "receive-pack".
Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Topic "proc-receive-hook" will change the workflow and output of
git-push. Add some basic test cases in t5411 before introducing the new
topic.
Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When pushing a new reference (not a head or tag), report it as a new
reference instead of a new branch.
Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The upload-pack protocol v2 gave up too early before finding a
common ancestor, resulting in a wasteful fetch from a fork of a
project. This has been corrected to match the behaviour of v0
protocol.
* jt/v2-fetch-nego-fix:
fetch-pack: in protocol v2, reset in_vain upon ACK
fetch-pack: in protocol v2, in_vain only after ACK
fetch-pack: return enum from process_acks()
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Error and verbose trace messages from "git push" did not redact
credential material embedded in URLs.
* js/anonymise-push-url-in-errors:
push: anonymize URLs in error messages and warnings
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The "bugreport" tool.
* es/bugreport:
bugreport: drop extraneous includes
bugreport: add compiler info
bugreport: add uname info
bugreport: gather git version and build info
bugreport: add tool to generate debugging info
help: move list_config_help to builtin/help
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Incompatible options "--root" and "--fork-point" of "git rebase"
have been marked and documented as being incompatible.
* en/rebase-root-and-fork-point-are-incompatible:
rebase: display an error if --root and --fork-point are both provided
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Recent update to Homebrew used by macOS folks breaks build by
moving gettext library and necessary headers.
* ds/build-homebrew-gettext-fix:
macOS/brew: let the build find gettext headers/libraries/msgfmt
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Compilation fix.
* dd/sparse-fixes:
progress.c: silence cgcc suggestion about internal linkage
graph.c: limit linkage of internal variable
compat/regex: move stdlib.h up in inclusion chain
test-parse-pathspec-file.c: s/0/NULL/ for pointer type
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Docfix.
* mt/doc-worktree-ref:
config doc: fix reference to config.worktree info
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Gitweb updates.
* eb/gitweb-more-trailers:
gitweb: Recognize *-to and Closes/Fixes trailers
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The multi-pack-index left mmapped file descriptors open when it
does not have to.
* ds/multi-pack-index:
multi-pack-index: close file descriptor after mmap
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"git blame" learns to take advantage of the "changed-paths" Bloom
filter stored in the commit-graph file.
* ds/blame-on-bloom:
test-bloom: check that we have expected arguments
test-bloom: fix some whitespace issues
blame: drop unused parameter from maybe_changed_path
blame: use changed-path Bloom filters
tests: write commit-graph with Bloom filters
revision: complicated pathspecs disable filters
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Introduce an extension to the commit-graph to make it efficient to
check for the paths that were modified at each commit using Bloom
filters.
* gs/commit-graph-path-filter:
bloom: ignore renames when computing changed paths
commit-graph: add GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS test flag
t4216: add end to end tests for git log with Bloom filters
revision.c: add trace2 stats around Bloom filter usage
revision.c: use Bloom filters to speed up path based revision walks
commit-graph: add --changed-paths option to write subcommand
commit-graph: reuse existing Bloom filters during write
commit-graph: write Bloom filters to commit graph file
commit-graph: examine commits by generation number
commit-graph: examine changed-path objects in pack order
commit-graph: compute Bloom filters for changed paths
diff: halt tree-diff early after max_changes
bloom.c: core Bloom filter implementation for changed paths.
bloom.c: introduce core Bloom filter constructs
bloom.c: add the murmur3 hash implementation
commit-graph: define and use MAX_NUM_CHUNKS
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The commit-graph code exhausted file descriptors easily when it
does not have to.
* tb/commit-graph-fd-exhaustion-fix:
commit-graph: close descriptors after mmap
commit-graph.c: gracefully handle file descriptor exhaustion
t/test-lib.sh: make ULIMIT_FILE_DESCRIPTORS available to tests
commit-graph.c: don't use discarded graph_name in error
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"git commit-graph write" learned different ways to write out split
files.
* tb/commit-graph-split-strategy:
Revert "commit-graph.c: introduce '--[no-]check-oids'"
commit-graph.c: introduce '--[no-]check-oids'
commit-graph.h: replace 'commit_hex' with 'commits'
oidset: introduce 'oidset_size'
builtin/commit-graph.c: introduce split strategy 'replace'
builtin/commit-graph.c: introduce split strategy 'no-merge'
builtin/commit-graph.c: support for '--split[=<strategy>]'
t/helper/test-read-graph.c: support commit-graph chains
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Fix in-core inconsistency after fetching into a shallow repository
that broke the code to write out commit-graph.
* tb/reset-shallow:
shallow.c: use '{commit,rollback}_shallow_file'
t5537: use test_write_lines and indented heredocs for readability
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Tighten "git mailinfo" to notice and error out when decoded result
contains NUL in it.
* dd/mailinfo-with-nul:
mailinfo: disallow NUL character in mail's header
mailinfo.c: avoid strlen on strings that can contains NUL
t4254: merge 2 steps of a single test
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Test clean-up.
* dl/test-must-fail-fixes-4:
t9819: don't use test_must_fail with p4
t9164: use test_must_fail only on git commands
t9160: use test_path_is_missing()
t9141: use test_path_is_missing()
t7508: don't use `test_must_fail test_cmp`
t7408: replace incorrect uses of test_must_fail
t6030: use test_path_is_missing()
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The build procedure did not use the libcurl library and its include
files correctly for a custom-built installation.
* jk/build-with-right-curl:
Makefile: avoid running curl-config unnecessarily
Makefile: use curl-config --cflags
Makefile: avoid running curl-config multiple times
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git update-ref --stdin" learned a handful of new verbs to let the
user control ref update transactions more explicitly, which helps
as an ingredient to implement two-phase commit-style atomic
ref-updates across multiple repositories.
* ps/transactional-update-ref-stdin:
update-ref: implement interactive transaction handling
update-ref: read commands in a line-wise fashion
update-ref: move transaction handling into `update_refs_stdin()`
update-ref: pass end pointer instead of strbuf
update-ref: drop unused argument for `parse_refname`
update-ref: organize commands in an array
strbuf: provide function to append whole lines
git-update-ref.txt: add missing word
refs: fix segfault when aborting empty transaction
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The directory traversal code had redundant recursive calls which
made its performance characteristics exponential with respect to
the depth of the tree, which was corrected.
* en/fill-directory-exponential:
completion: fix 'git add' on paths under an untracked directory
Fix error-prone fill_directory() API; make it only return matches
dir: replace double pathspec matching with single in treat_directory()
dir: include DIR_KEEP_UNTRACKED_CONTENTS handling in treat_directory()
dir: replace exponential algorithm with a linear one
dir: refactor treat_directory to clarify control flow
dir: fix confusion based on variable tense
dir: fix broken comment
dir: consolidate treat_path() and treat_one_path()
dir: fix simple typo in comment
t3000: add more testcases testing a variety of ls-files issues
t7063: more thorough status checking
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"sparse-checkout" UI improvements.
* en/sparse-checkout:
sparse-checkout: provide a new reapply subcommand
unpack-trees: failure to set SKIP_WORKTREE bits always just a warning
unpack-trees: provide warnings on sparse updates for unmerged paths too
unpack-trees: make sparse path messages sound like warnings
unpack-trees: split display_error_msgs() into two
unpack-trees: rename ERROR_* fields meant for warnings to WARNING_*
unpack-trees: move ERROR_WOULD_LOSE_SUBMODULE earlier
sparse-checkout: use improved unpack_trees porcelain messages
sparse-checkout: use new update_sparsity() function
unpack-trees: add a new update_sparsity() function
unpack-trees: pull sparse-checkout pattern reading into a new function
unpack-trees: do not mark a dirty path with SKIP_WORKTREE
unpack-trees: allow check_updates() to work on a different index
t1091: make some tests a little more defensive against failures
unpack-trees: simplify pattern_list freeing
unpack-trees: simplify verify_absent_sparse()
unpack-trees: remove unused error type
unpack-trees: fix minor typo in comment
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Update the CI configuration to use GitHub Actions, retiring the one
based on Azure Pipelines.
* dd/ci-swap-azure-pipelines-with-github-actions:
ci: let GitHub Actions upload failed tests' directories
ci: add a problem matcher for GitHub Actions
tests: when run in Bash, annotate test failures with file name/line number
ci: retire the Azure Pipelines definition
README: add a build badge for the GitHub Actions runs
ci: configure GitHub Actions for CI/PR
ci: run gem with sudo to install asciidoctor
ci: explicit install all required packages
ci: fix the `jobname` of the `GETTEXT_POISON` job
ci/lib: set TERM environment variable if not exist
ci/lib: allow running in GitHub Actions
ci/lib: if CI type is unknown, show the environment variables
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A new CI job to build and run test suite on linux with musl libc
has been added.
* dd/ci-musl-libc:
travis: build and test on Linux with musl libc and busybox
ci/linux32: libify install-dependencies step
ci: refactor docker runner script
ci/linux32: parameterise command to switch arch
ci/lib-docker: preserve required environment variables
ci: make MAKEFLAGS available inside the Docker container in the Linux32 job
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The stash entry created by "git rebase --autosquash" to keep the
initial dirty state were discarded by mistake upon "git rebase
--quit", which has been corrected.
* dl/merge-autostash-rebase-quit-fix:
rebase: save autostash entry into stash reflog on --quit
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"git merge" learns the "--autostash" option.
* dl/merge-autostash: (22 commits)
pull: pass --autostash to merge
t5520: make test_pull_autostash() accept expect_parent_num
merge: teach --autostash option
sequencer: implement apply_autostash_oid()
sequencer: implement save_autostash()
sequencer: unlink autostash in apply_autostash()
sequencer: extract perform_autostash() from rebase
rebase: generify create_autostash()
rebase: extract create_autostash()
reset: extract reset_head() from rebase
rebase: generify reset_head()
rebase: use apply_autostash() from sequencer.c
sequencer: rename stash_sha1 to stash_oid
sequencer: make apply_autostash() accept a path
rebase: use read_oneliner()
sequencer: make read_oneliner() extern
sequencer: configurably warn on non-existent files
sequencer: make read_oneliner() accept flags
sequencer: make file exists check more efficient
sequencer: stop leaking buf
...
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This reverts commit 7a9ce0269bc0f4ef230f930b3910b70ac3142552,
which has not yet gained consensus.
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Those fetching over protocol v2 from linux-next and other kernel
repositories are reporting that v2 often fetches way too much than
needed.
* jn/demote-proto2-from-default:
Revert "fetch: default to protocol version 2"
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GNU/Hurd is also among the ones that need the fopen() wrapper.
* jc/gnu-hurd-lets-fread-read-dirs:
config.mak.uname: Define FREAD_READS_DIRECTORIES for GNU/Hurd
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Docfix.
* ms/doc-revision-illustration-fix:
docs: fix minor glitch in illustration
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zsh command line completion (in contrib/) update.
* tm/zsh-complete-switch-restore:
complete: zsh: add missing sub cmd completion candidates
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"git grep" did not quote a path with unusual character like other
commands (like "git diff", "git status") do, but did quote when run
from a subdirectory, both of which has been corrected.
* mt/grep-cquote-path:
grep: follow conventions for printing paths w/ unusual chars
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The "--decorate-refs" and "--decorate-refs-exclude" options "git
log" takes have learned a companion configuration variable
log.excludeDecoration that sits at the lowest priority in the
family.
* ds/log-exclude-decoration-config:
log: add log.excludeDecoration config option
log-tree: make ref_filter_match() a helper method
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"git range-diff" fixes.
* vd/range-diff-with-custom-pretty-format-fix:
range-diff: avoid negative string precision
range-diff: fix a crash in parsing git-log output
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"git diff-tree --pretty --notes" used to hit an assertion failure,
as it forgot to initialize the notes subsystem.
* tb/diff-tree-with-notes:
diff-tree.c: load notes machinery when required
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Doc update.
* eb/mboxrd-doc:
Documentation: explain "mboxrd" pretty format
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Allowing the user to split a patch hunk while "git stash -p" does
not work well; a band-aid has been added to make this (partially)
work better.
* js/stash-p-fix:
stash -p: (partially) fix bug concerning split hunks
t3904: fix incorrect demonstration of a bug
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Code in builtin/*, i.e. those can only be called from within
built-in subcommands, that implements bulk of a couple of
subcommands have been moved to libgit.a so that they could be used
by others.
* dl/libify-a-few:
Lib-ify prune-packed
Lib-ify fmt-merge-msg
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"git push --atomic" used to show failures for refs that weren't
even pushed, which has been corrected.
* jx/atomic-push:
transport-helper: new method reject_atomic_push()
transport-helper: mark failure for atomic push
send-pack: mark failure of atomic push properly
t5543: never report what we do not push
send-pack: fix inconsistent porcelain output
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"git diff" in a partial clone learned to avoid lazy loading blob
objects in more casese when they are not needed.
* jt/avoid-prefetch-when-able-in-diff:
diff: restrict when prefetching occurs
diff: refactor object read
diff: make diff_populate_filespec_options struct
promisor-remote: accept 0 as oid_nr in function
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Doc markup update.
* js/subtree-doc-update-to-asciidoctor-2:
subtree: fix build with AsciiDoctor 2
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Tests update to use "test-chmtime" instead of "touch -t".
* ds/t5319-touch-fix:
t5319: replace 'touch -m' with 'test-tool chmtime'
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"git commit-graph write --expire-time=<timestamp>" did not use the
given timestamp correctly, which has been corrected.
* ds/commit-graph-expiry-fix:
commit-graph: fix buggy --expire-time option
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Documentation updates around the "--recurse-submodules" option.
* dr/doc-recurse-submodules:
doc: --recurse-submodules mostly applies to active submodules
doc: be more precise on (fetch|push).recurseSubmodules
doc: explain how to deactivate submodule.recurse completely
doc: document --recurse-submodules for reset and restore
doc: list all commands affected by submodule.recurse
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"git log" learns "--[no-]mailmap" as a synonym to "--[no-]use-mailmap"
* jc/log-no-mailmap:
log: give --[no-]use-mailmap a more sensible synonym --[no-]mailmap
clone: reorder --recursive/--recurse-submodules
parse-options: teach "git cmd -h" to show alias as alias
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Raise the minimum required version of docbook-xsl package to 1.74,
as 1.74.0 was from late 2008, which is more than 10 years old, and
drop compatibility cruft from our documentation suite.
* ma/doc-discard-docbook-xsl-1.73:
user-manual.conf: don't specify [listingblock]
INSTALL: drop support for docbook-xsl before 1.74
manpage-normal.xsl: fold in manpage-base.xsl
manpage-bold-literal.xsl: stop using git.docbook.backslash
Doc: drop support for docbook-xsl before 1.73.0
Doc: drop support for docbook-xsl before 1.72.0
Doc: drop support for docbook-xsl before 1.71.1
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Jiang Xin
Junio C Hamano