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A simple IPC interface gets introduced to build services like
fsmonitor on top.
* jh/simple-ipc:
t0052: add simple-ipc tests and t/helper/test-simple-ipc tool
simple-ipc: add Unix domain socket implementation
unix-stream-server: create unix domain socket under lock
unix-socket: disallow chdir() when creating unix domain sockets
unix-socket: add backlog size option to unix_stream_listen()
unix-socket: eliminate static unix_stream_socket() helper function
simple-ipc: add win32 implementation
simple-ipc: design documentation for new IPC mechanism
pkt-line: add options argument to read_packetized_to_strbuf()
pkt-line: add PACKET_READ_GENTLE_ON_READ_ERROR option
pkt-line: do not issue flush packets in write_packetized_*()
pkt-line: eliminate the need for static buffer in packet_write_gently()
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Reorganize Makefile to allow building git.o and other essential
objects without extra stuff needed only for testing.
* ab/make-cleanup:
Makefile: add {program,xdiff,test,git,fuzz}-objs & objects targets
Makefile: split OBJECTS into OBJECTS and GIT_OBJS
Makefile: sort OBJECTS assignment for subsequent change
Makefile: split up long OBJECTS line
Makefile: guard against TEST_OBJS in the environment
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Create t0052-simple-ipc.sh with unit tests for the "simple-ipc" mechanism.
Create t/helper/test-simple-ipc test tool to exercise the "simple-ipc"
functions.
When the tool is invoked with "run-daemon", it runs a server to listen
for "simple-ipc" connections on a test socket or named pipe and
responds to a set of commands to exercise/stress the communication
setup.
When the tool is invoked with "start-daemon", it spawns a "run-daemon"
command in the background and waits for the server to become ready
before exiting. (This helps make unit tests in t0052 more predictable
and avoids the need for arbitrary sleeps in the test script.)
The tool also has a series of client "send" commands to send commands
and data to a server instance.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Create Unix domain socket based implementation of "simple-ipc".
A set of `ipc_client` routines implement a client library to connect
to an `ipc_server` over a Unix domain socket, send a simple request,
and receive a single response. Clients use blocking IO on the socket.
A set of `ipc_server` routines implement a thread pool to listen for
and concurrently service client connections.
The server creates a new Unix domain socket at a known location. If a
socket already exists with that name, the server tries to determine if
another server is already listening on the socket or if the socket is
dead. If socket is busy, the server exits with an error rather than
stealing the socket. If the socket is dead, the server creates a new
one and starts up.
If while running, the server detects that its socket has been stolen
by another server, it automatically exits.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Create a wrapper class for `unix_stream_listen()` that uses a ".lock"
lockfile to create the unix domain socket in a race-free manner.
Unix domain sockets have a fundamental problem on Unix systems because
they persist in the filesystem until they are deleted. This is
independent of whether a server is actually listening for connections.
Well-behaved servers are expected to delete the socket when they
shutdown. A new server cannot easily tell if a found socket is
attached to an active server or is leftover cruft from a dead server.
The traditional solution used by `unix_stream_listen()` is to force
delete the socket pathname and then create a new socket. This solves
the latter (cruft) problem, but in the case of the former, it orphans
the existing server (by stealing the pathname associated with the
socket it is listening on).
We cannot directly use a .lock lockfile to create the socket because
the socket is created by `bind(2)` rather than the `open(2)` mechanism
used by `tempfile.c`.
As an alternative, we hold a plain lockfile ("<path>.lock") as a
mutual exclusion device. Under the lock, we test if an existing
socket ("<path>") is has an active server. If not, we create a new
socket and begin listening. Then we use "rollback" to delete the
lockfile in all cases.
This wrapper code conceptually exists at a higher-level than the core
unix_stream_connect() and unix_stream_listen() routines that it
consumes. It is isolated in a wrapper class for clarity.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Create Windows implementation of "simple-ipc" using named pipes.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Clang no longer produces a libFuzzer.a. Instead, you can include
libFuzzer by using -fsanitize=fuzzer. Therefore we should use that in
the example command for building fuzzers.
We also add -fsanitize=fuzzer-no-link to the CFLAGS to ensure that all
the required instrumentation is added when compiling git [1], and remove
-fsanitize-coverage=trace-pc-guard as it is deprecated.
I happen to have tested with LLVM 11 - however -fsanitize=fuzzer appears
to work in a wide range of reasonably modern clangs.
(On my system: what used to be libFuzzer.a now lives under the following
path, which is tricky albeit not impossible for a novice such as myself
to find:
/usr/lib64/clang/11.0.0/lib/linux/libclang_rt.fuzzer-x86_64.a )
[1] https://releases.llvm.org/11.0.0/docs/LibFuzzer.html#fuzzer-usage
Signed-off-by: Andrzej Hunt <ajrhunt@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Work around platforms whose open() is reported to return EINTR (it
shouldn't, as we do our signals with SA_RESTART).
* jk/open-returns-eintr:
config.mak.uname: enable OPEN_RETURNS_EINTR for macOS Big Sur
Makefile: add OPEN_RETURNS_EINTR knob
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The common code to deal with "chunked file format" that is shared
by the multi-pack-index and commit-graph files have been factored
out, to help codepaths for both filetypes to become more robust.
* ds/chunked-file-api:
commit-graph.c: display correct number of chunks when writing
chunk-format: add technical docs
chunk-format: restore duplicate chunk checks
midx: use 64-bit multiplication for chunk sizes
midx: use chunk-format read API
commit-graph: use chunk-format read API
chunk-format: create read chunk API
midx: use chunk-format API in write_midx_internal()
midx: drop chunk progress during write
midx: return success/failure in chunk write methods
midx: add num_large_offsets to write_midx_context
midx: add pack_perm to write_midx_context
midx: add entries to write_midx_context
midx: use context in write_midx_pack_names()
midx: rename pack_info to write_midx_context
commit-graph: use chunk-format write API
chunk-format: create chunk format write API
commit-graph: anonymize data in chunk_write_fn
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On some platforms, open() reportedly returns EINTR when opening regular
files and we receive a signal (usually SIGALRM from our progress meter).
This shouldn't happen, as open() should be a restartable syscall, and we
specify SA_RESTART when setting up the alarm handler. So it may actually
be a kernel or libc bug for this to happen. But it has been reported on
at least one version of Linux (on a network filesystem):
https://lore.kernel.org/git/c8061cce-71e4-17bd-a56a-a5fed93804da@neanderfunk.de/
as well as on macOS starting with Big Sur even on a regular filesystem.
We can work around it by retrying open() calls that get EINTR, just as
we do for read(), etc. Since we don't ever _want_ to interrupt an open()
call, we can get away with just redefining open, rather than insisting
all callsites use xopen().
We actually do have an xopen() wrapper already (and it even does this
retry, though there's no indication of it being an observed problem back
then; it seems simply to have been lifted from xread(), etc). But it is
used hardly anywhere, and isn't suitable for general use because it will
die() on error. In theory we could combine the two, but it's awkward to
do so because of the variable-args interface of open().
This patch adds a Makefile knob for enabling the workaround. It's not
enabled by default for any platforms in config.mak.uname yet, as we
don't have enough data to decide how common this is (I have not been
able to reproduce on either Linux or Big Sur myself). It may be worth
enabling preemptively anyway, since the cost is pretty low (if we don't
see an EINTR, it's just an extra conditional).
However, note that we must not enable this on Windows. It doesn't do
anything there, and the macro overrides the existing mingw_open()
redirection. I've added a preemptive #undef here in the mingw header
(which is processed first) to just quietly disable it (we could also
make it an #error, but there is little point in being so aggressive).
Reported-by: Aleksey Kliger <alklig@microsoft.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add targets to compile the various *.o files we declared in commonly
used *_OBJS variables. This is useful for debugging purposes, to
e.g. get to the point where we can compile a git.o. See [1] for a
use-case for this target.
https://lore.kernel.org/git/YBCGtd9if0qtuQxx@coredump.intra.peff.net/
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a new GIT_OBJS variable, with the objects sufficient to get to a
git.o or common-main.o.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Change the order of the OBJECTS assignment, this makes a follow-up
change where we split it up into two variables smaller.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Split up the long OBJECTS line into multiple lines using the "+="
assignment we commonly use elsewhere in the Makefile when these lines
get unwieldy.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add TEST_OBJS to the list of other *_OBJS variables we reset. We had
already established this pattern when TEST_OBJS was introduced in
daa99a91729 (Makefile: make sure test helpers are rebuilt when headers
change, 2010-01-26), but it wasn't added to the list in that commit
along with the rest.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In anticipation of combining the logic from the commit-graph and
multi-pack-index file formats, create a new chunk-format API. Use a
'struct chunkfile' pointer to keep track of data that has been
registered for writes. This struct is anonymous outside of
chunk-format.c to ensure no user attempts to interfere with the data.
The next change will use this API in commit-graph.c, but the general
approach is:
1. initialize the chunkfile with init_chunkfile(f).
2. add chunks in the intended writing order with add_chunk().
3. write any header information to the hashfile f.
4. write the chunkfile data using write_chunkfile().
5. free the chunkfile struct using free_chunkfile().
Helped-by: Taylor Blau <me@ttaylorr.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In the implementation of "git difftool", there is a case where the
user wants to start viewing the diffs at a specific path and
continue on to the rest, optionally wrapping around to the
beginning. Since it is somewhat cumbersome to implement such a
feature as a post-processing step of "git diff" output, let's
support it internally with two new options.
- "git diff --rotate-to=C", when the resulting patch would show
paths A B C D E without the option, would "rotate" the paths to
shows patch to C D E A B instead. It is an error when there is
no patch for C is shown.
- "git diff --skip-to=C" would instead "skip" the paths before C,
and shows patch to C D E. Again, it is an error when there is no
patch for C is shown.
- "git log [-p]" also accepts these two options, but it is not an
error if there is no change to the specified path. Instead, the
set of output paths are rotated or skipped to the specified path
or the first path that sorts after the specified path.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Update support for invalid UTF-8 in PCRE2.
* ab/grep-pcre-invalid-utf8:
grep/pcre2: better support invalid UTF-8 haystacks
grep/pcre2 tests: don't rely on invalid UTF-8 data test
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The support for deprecated PCRE1 library has been dropped.
* ab/retire-pcre1:
Remove support for v1 of the PCRE library
config.mak.uname: remove redundant NO_LIBPCRE1_JIT flag
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"git log" learned a new "--diff-merges=<how>" option.
* so/log-diff-merge: (32 commits)
t4013: add tests for --diff-merges=first-parent
doc/git-show: include --diff-merges description
doc/rev-list-options: document --first-parent changes merges format
doc/diff-generate-patch: mention new --diff-merges option
doc/git-log: describe new --diff-merges options
diff-merges: add '--diff-merges=1' as synonym for 'first-parent'
diff-merges: add old mnemonic counterparts to --diff-merges
diff-merges: let new options enable diff without -p
diff-merges: do not imply -p for new options
diff-merges: implement new values for --diff-merges
diff-merges: make -m/-c/--cc explicitly mutually exclusive
diff-merges: refactor opt settings into separate functions
diff-merges: get rid of now empty diff_merges_init_revs()
diff-merges: group diff-merge flags next to each other inside 'rev_info'
diff-merges: split 'ignore_merges' field
diff-merges: fix -m to properly override -c/--cc
t4013: add tests for -m failing to override -c/--cc
t4013: support test_expect_failure through ':failure' magic
diff-merges: revise revs->diff flag handling
diff-merges: handle imply -p on -c/--cc logic for log.c
...
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Build fix.
* js/skip-dashed-built-ins-from-config-mak:
SKIP_DASHED_BUILT_INS: respect `config.mak`
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Build fix.
* js/skip-dashed-built-ins-from-config-mak:
SKIP_DASHED_BUILT_INS: respect `config.mak`
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Improve the support for invalid UTF-8 haystacks given a non-ASCII
needle when using the PCREv2 backend.
This is a more complete fix for a bug I started to fix in
870eea8166 (grep: do not enter PCRE2_UTF mode on fixed matching,
2019-07-26), now that PCREv2 has the PCRE2_MATCH_INVALID_UTF mode we
can make use of it.
This fixes the sort of case described in 8a5999838e (grep: stess test
PCRE v2 on invalid UTF-8 data, 2019-07-26), i.e.:
- The subject string is non-ASCII (e.g. "ævar")
- We're under a is_utf8_locale(), e.g. "en_US.UTF-8", not "C"
- We are using --ignore-case, or we're a non-fixed pattern
If those conditions were satisfied and we matched found non-valid
UTF-8 data PCREv2 might bark on it, in practice this only happened
under the JIT backend (turned on by default on most platforms).
Ultimately this fixes a "regression" in b65abcafc7 ("grep: use PCRE v2
for optimized fixed-string search", 2019-07-01), I'm putting that in
scare-quotes because before then we wouldn't properly support these
complex case-folding, locale etc. cases either, it just broke in
different ways.
There was a bug related to this the PCRE2_NO_START_OPTIMIZE flag fixed
in PCREv2 10.36. It can be worked around by setting the
PCRE2_NO_START_OPTIMIZE flag. Let's do that in those cases, and add
tests for the bug.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Remove support for using version 1 of the PCRE library. Its use has
been discouraged by upstream for a long time, and it's in a
bugfix-only state.
Anyone who was relying on v1 in particular got a nudge to move to v2
in e6c531b808 (Makefile: make USE_LIBPCRE=YesPlease mean v2, not v1,
2018-03-11), which was first released as part of v2.18.0.
With this the LIBPCRE2 test prerequisites is redundant to PCRE. But
I'm keeping it for self-documentation purposes, and to avoid conflict
with other in-flight PCRE patches.
I'm also not changing all of our own "pcre2" names to "pcre", i.e. the
inverse of 6d4b5747f0 (grep: change internal *pcre* variable &
function names to be *pcre1*, 2017-05-25). I don't see the point, and
it makes the history/blame harder to read. Maybe if there's ever a
PCRE v3...
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When `SKIP_DASHED_BUILT_INS` is specified in `config.mak`, the dashed
form of the built-ins was still generated.
By moving the `SKIP_DASHED_BUILT_INS` handling after `config.mak` was
read, this can be avoided.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Comments update.
* ab/gettext-charset-comment-fix:
gettext.c: remove/reword a mostly-useless comment
Makefile: remove a warning about old GETTEXT_POISON flag
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Remove a migratory warning I added in 6cdccfce1e0 (i18n: make
GETTEXT_POISON a runtime option, 2018-11-08) to give anyone using that
option in their builds a heads-up about the change from compile-time
to runtime introduced in that commit.
It's been more than 2 years since then, anyone who ran into this is
likely to have made a change as a result, so removing this is long
overdue.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Change all remnants of "sha1" in hash-lookup.c and .h and rename them to
reflect that we're not just able to handle SHA-1 these days.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Drop the last remnant of "sha1" in this file and rename it to reflect
that we're not just able to handle SHA-1 these days.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Generalize the last remnants of "sha" and "sha1" in this file and rename
it to reflect that we're not just able to handle SHA-1 these days.
We need to update one test to check for an updated error string.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Create separate diff-merges.c and diff-merges.h files, and move all
the code related to handling of diff merges there.
Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Doc update.
* dd/doc-p4-requirements-update:
doc: mention Python 3.x supports
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Build optimization.
* rj/make-clean:
Makefile: don't use a versioned temp distribution directory
Makefile: don't try to clean old debian build product
gitweb/Makefile: conditionally include ../GIT-VERSION-FILE
Documentation/Makefile: conditionally include ../GIT-VERSION-FILE
Documentation/Makefile: conditionally include doc.dep
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Commit 0b4396f068, (git-p4: make python2.7 the oldest supported version,
2019-12-13) pointed out that git-p4 uses Python 2.7-or-later features
in the code.
In addition, git-p4 gained enough support for Python 3 from
6cec21a82f, (git-p4: encode/decode communication with p4 for
python3, 2019-12-13).
Let's update our documentation to reflect that fact.
Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The 'dist' target uses a versioned temp directory, $(GIT_TARNAME), into
which it copies various files added to the distribution tarball. Should
it be necessary to remove this directory in the 'clean' target, since
the name depends on $(GIT_VERSION), the current HEAD must be positioned
on the same commit as when 'make dist' was issued. Otherwise, the target
will fail to remove that directory.
Create an '.dist-tmp-dir' directory and copy the various files into this
now un-versioned directory while creating the distribution tarball. Change
the 'clean' target to remove the '.dist-tmp-dir' directory, instead of the
version dependent $(GIT_TARNAME) directory.
Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The 'clean' target includes code to remove an '*.tar.gz' file that
was the by-product of a debian build. This was originally added by
commit 5a571cdd8a (Clean generated files a bit more, to cope with
Debian build droppings., 2005-08-12). However, all support for the
'debian build' was dropped by commit 7d0e65b892 (Retire debian/
directory., 2006-01-06), which seems to have simply forgotten to
remove the 'git-core_$(GIT_VERSION)-*.tar.gz' from the 'clean'
target. Remove it now.
Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Build consistency fix.
* ds/maintenance-part-1:
Makefile: mark git-maintenance as a builtin
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"git-parse-remote" shell script library outlived its usefulness.
* ab/retire-parse-remote:
submodule: fix fetch_in_submodule logic
parse-remote: remove this now-unused library
submodule: remove sh function in favor of helper
submodule: use "fetch" logic instead of custom remote discovery
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We normally get the list of builtin commands by expanding BUILTIN_OBJS.
But for commands which are embedded inside another's source file (e.g.,
cmd_show() in builtin/log.c), the Makefile needs to be told explicitly
about them.
Since cmd_maintenance() is inside buitin/gc.c, it should be listed
explicitly in the BUILT_INS list in the Makefile. Not doing so isn't
_too_ tragic, as it simply means we will not make a git-maintenance
symlink in libexec/git-core. Since we encourage people to use the "git
foo" form, even in scripts which have put libexec into their PATH,
nobody seems to have noticed.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A specialization of hashmap that uses a string as key has been
introduced. Hopefully it will see wider use over time.
* en/strmap:
shortlog: use strset from strmap.h
Use new HASHMAP_INIT macro to simplify hashmap initialization
strmap: take advantage of FLEXPTR_ALLOC_STR when relevant
strmap: enable allocations to come from a mem_pool
strmap: add a strset sub-type
strmap: split create_entry() out of strmap_put()
strmap: add functions facilitating use as a string->int map
strmap: enable faster clearing and reusing of strmaps
strmap: add more utility functions
strmap: new utility functions
hashmap: provide deallocation function names
hashmap: introduce a new hashmap_partial_clear()
hashmap: allow re-use after hashmap_free()
hashmap: adjust spacing to fix argument alignment
hashmap: add usage documentation explaining hashmap_free[_entries]()
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Preparation for a new merge strategy.
* en/merge-ort-api-null-impl:
merge,rebase,revert: select ort or recursive by config or environment
fast-rebase: demonstrate merge-ort's API via new test-tool command
merge-ort-wrappers: new convience wrappers to mimic the old merge API
merge-ort: barebones API of new merge strategy with empty implementation
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Parts of "git maintenance" to ease writing crontab entries (and
other scheduling system configuration) for it.
* ds/maintenance-part-3:
maintenance: add troubleshooting guide to docs
maintenance: use 'incremental' strategy by default
maintenance: create maintenance.strategy config
maintenance: add start/stop subcommands
maintenance: add [un]register subcommands
for-each-repo: run subcommands on configured repos
maintenance: add --schedule option and config
maintenance: optionally skip --auto process
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The previous two commits removed the last use of a function in this
library, but most of it had been dead code for a while[1][2]. Only the
"get_default_remote" function was still being used.
Even though we had a manual page for this library it was never
intended (or I expect, actually) used outside of git.git. Let's just
remove it, if anyone still cares about a function here they can pull
them into their own project[3].
1. Last use of error_on_missing_default_upstream():
d03ebd411c ("rebase: remove the rebase.useBuiltin setting",
2019-03-18)
2. Last use of get_remote_merge_branch(): 49eb8d39c7 ("Remove
contrib/examples/*", 2018-03-25)
3. https://lore.kernel.org/git/87a6vmhdka.fsf@evledraar.gmail.com/
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Dev support.
* jk/perl-warning:
perl: check for perl warnings while running tests
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Add strmap as a new struct and associated utility functions,
specifically for hashmaps that map strings to some value. The API is
taken directly from Peff's proposal at
https://lore.kernel.org/git/20180906191203.GA26184@sigill.intra.peff.net/
Note that similar string-list, I have a strdup_strings setting.
However, unlike string-list, strmap_init() does not take a parameter for
this setting and instead automatically sets it to 1; callers who want to
control this detail need to instead call strmap_init_with_options().
(Future patches will add additional parameters to
strmap_init_with_options()).
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a new test-tool command named 'fast-rebase', which is a
super-slimmed down and nowhere near as capable version of 'git rebase'.
'test-tool fast-rebase' is not currently planned for usage in the
testsuite, but is here for two purposes:
1) Demonstrate the desired API of merge-ort. In particular,
fast-rebase takes advantage of the separation of the merging
operation from the updating of the index and working tree, to
allow it to pick N commits, but only update the index and working
tree once at the end. Look for the calls to
merge_incore_nonrecursive() and merge_switch_to_result().
2) Provide a convenient benchmark that isn't polluted by the heavy
disk writing and forking of unnecessary processes that comes from
sequencer.c and merge-recursive.c. fast-rebase is not meant to
replace sequencer.c, just give ideas on how sequencer.c can be
changed. Updating sequencer.c with these goals is probably a
large amount of work; writing a simple targeted command with
no documentation, less-than-useful help messages, numerous
limitations in terms of flags it can accept and situations it can
handle, and which is flagged off from users is a much easier
interim step.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Use "git archive" more to produce the release tarball.
* rs/dist-doc-with-git-archive:
Makefile: remove the unused variable TAR_DIST_EXTRA_OPTS
Makefile: use git init/add/commit/archive for dist-doc
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There are a few differences between the new API in merge-ort and the old
API in merge-recursive. While the new API is more flexible, it might
feel like more work at times than the old API. merge-ort-wrappers
creates two convenience wrappers taking the exact same arguments as the
old merge_trees() and merge_recursive() functions and implements them
via the new API. This makes converting existing callsites easier, and
serves to highlight some of the differences in the API.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This is the beginning of a new merge strategy. While there are some API
differences, and the implementation has some differences in behavior, it
is essentially meant as an eventual drop-in replacement for
merge-recursive.c. However, it is being built to exist side-by-side
with merge-recursive so that we have plenty of time to find out how
those differences pan out in the real world while people can still fall
back to merge-recursive. (Also, I intend to avoid modifying
merge-recursive during this process, to keep it stable.)
The primary difference noticable here is that the updating of the
working tree and index is not done simultaneously with the merge
algorithm, but is a separate post-processing step. The new API is
designed so that one can do repeated merges (e.g. during a rebase or
cherry-pick) and only update the index and working tree one time at the
end instead of updating it with every intermediate result. Also, one
can perform a merge between two branches, neither of which match the
index or the working tree, without clobbering the index or working tree.
The next three commits will demonstrate various uses of this new API.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Brown-paper-bag fix.
* js/no-builtins-on-disk-option:
SKIP_DASHED_BUILT_INS: do not skip the bin/ programs
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