Junio C Hamano [Thu, 7 Mar 2019 00:59:56 +0000 (09:59 +0900)]
Merge branch 'jk/prune-optim'
"git prune" has been taught to take advantage of reachability
bitmap when able.
* jk/prune-optim:
t5304: rename "sha1" variables to "oid"
prune: check SEEN flag for reachability
prune: use bitmaps for reachability traversal
prune: lazily perform reachability traversal
Junio C Hamano [Thu, 7 Mar 2019 00:59:54 +0000 (09:59 +0900)]
Merge branch 'en/combined-all-paths'
Output from "diff --cc" did not show the original paths when the
merge involved renames. A new option adds the paths in the
original trees to the output.
Junio C Hamano [Thu, 7 Mar 2019 00:59:54 +0000 (09:59 +0900)]
Merge branch 'sc/pack-redundant'
Update the implementation of pack-redundant for performance in a
repository with many packfiles.
* sc/pack-redundant:
pack-redundant: consistent sort method
pack-redundant: rename pack_list.all_objects
pack-redundant: new algorithm to find min packs
pack-redundant: delete redundant code
pack-redundant: delay creation of unique_objects
t5323: test cases for git-pack-redundant
Junio C Hamano [Thu, 7 Mar 2019 00:59:52 +0000 (09:59 +0900)]
Merge branch 'aw/pretty-trailers'
The %(trailers) formatter in "git log --format=..." now allows to
optionally pick trailers selectively by keyword, show only values,
etc.
* aw/pretty-trailers:
pretty: add support for separator option in %(trailers)
strbuf: separate callback for strbuf_expand:ing literals
pretty: add support for "valueonly" option in %(trailers)
pretty: allow showing specific trailers
pretty: single return path in %(trailers) handling
pretty: allow %(trailers) options with explicit value
doc: group pretty-format.txt placeholders descriptions
Junio C Hamano [Thu, 7 Mar 2019 00:59:52 +0000 (09:59 +0900)]
Merge branch 'nd/diff-parseopt'
The diff machinery, one of the oldest parts of the system, which
long predates the parse-options API, uses fairly long and complex
handcrafted option parser. This is being rewritten to use the
parse-options API.
* nd/diff-parseopt:
diff.c: convert --raw
diff.c: convert -W|--[no-]function-context
diff.c: convert -U|--unified
diff.c: convert -u|-p|--patch
diff.c: prepare to use parse_options() for parsing
diff.h: avoid bit fields in struct diff_flags
diff.h: keep forward struct declarations sorted
parse-options: allow ll_callback with OPTION_CALLBACK
parse-options: avoid magic return codes
parse-options: stop abusing 'callback' for lowlevel callbacks
parse-options: add OPT_BITOP()
parse-options: disable option abbreviation with PARSE_OPT_KEEP_UNKNOWN
parse-options: add one-shot mode
parse-options.h: remove extern on function prototypes
Junio C Hamano [Thu, 7 Mar 2019 00:59:51 +0000 (09:59 +0900)]
Merge branch 'tg/checkout-no-overlay'
"git checkout --no-overlay" can be used to trigger a new mode of
checking out paths out of the tree-ish, that allows paths that
match the pathspec that are in the current index and working tree
and are not in the tree-ish.
* tg/checkout-no-overlay:
revert "checkout: introduce checkout.overlayMode config"
checkout: introduce checkout.overlayMode config
checkout: introduce --{,no-}overlay option
checkout: factor out mark_cache_entry_for_checkout function
checkout: clarify comment
read-cache: add invalidate parameter to remove_marked_cache_entries
entry: support CE_WT_REMOVE flag in checkout_entry
entry: factor out unlink_entry function
move worktree tests to t24*
Jean-Noël Avila [Mon, 25 Feb 2019 21:11:15 +0000 (22:11 +0100)]
l10n: fr.po remove obsolete entries
On NetBSD, the version of msgfmt is still 0.14.4. There's no hope for
an upgrade due to some GPLv3 allergy of NetBSD's. This version chokes
on heavily decorated commented entries in po files. It's safer to get
rid of all these obsolete entries.
During the six months of development of the Azure Pipelines support, the
patches went through quite a few iterations of changes, and to test
those iterations, a temporary build definition was used.
In the meantime, Azure Pipelines support made it to `master`, and we now
have a regular Azure Pipeline, installed via the common GitHub App
workflow. This new pipeline has a different name (git.git instead of
test-git.git), and a new ID (11 instead of 2).
Let's adjust the badge in our README to reflect that final shape of the
Azure Pipeline.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Derrick Stolee [Fri, 22 Feb 2019 22:25:07 +0000 (14:25 -0800)]
trace2:data: pack-objects: add trace2 regions
When studying the performance of 'git push' we would like to know
how much time is spent at various parts of the command. One area
that could cause performance trouble is 'git pack-objects'.
Add trace2 regions around the three main actions taken in this
command:
Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Fri, 22 Feb 2019 22:25:03 +0000 (14:25 -0800)]
trace2:data: add trace2 regions to wt-status
Add trace2_region_enter() and trace2_region_leave() calls around the
various phases of a status scan. This gives elapsed time for each
phase in the GIT_TR2_PERF and GIT_TR2_EVENT trace target.
Also, these Trace2 calls now use s->repo rather than the_repository.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Fri, 22 Feb 2019 22:25:01 +0000 (14:25 -0800)]
trace2: create new combined trace facility
Create a new unified tracing facility for git. The eventual intent is to
replace the current trace_printf* and trace_performance* routines with a
unified set of git_trace2* routines.
In addition to the usual printf-style API, trace2 provides higer-level
event verbs with fixed-fields allowing structured data to be written.
This makes post-processing and analysis easier for external tools.
Trace2 defines 3 output targets. These are set using the environment
variables "GIT_TR2", "GIT_TR2_PERF", and "GIT_TR2_EVENT". These may be
set to "1" or to an absolute pathname (just like the current GIT_TRACE).
* GIT_TR2 is intended to be a replacement for GIT_TRACE and logs command
summary data.
* GIT_TR2_PERF is intended as a replacement for GIT_TRACE_PERFORMANCE.
It extends the output with columns for the command process, thread,
repo, absolute and relative elapsed times. It reports events for
child process start/stop, thread start/stop, and per-thread function
nesting.
* GIT_TR2_EVENT is a new structured format. It writes event data as a
series of JSON records.
Calls to trace2 functions log to any of the 3 output targets enabled
without the need to call different trace_printf* or trace_performance*
routines.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Change an unportable invocation of "dd" with count=0, that wanted to
truncate the commit-graph file. In POSIX it is unspecified what
happens when count=0 is provided[1]. The NetBSD "dd" behavior
differs from GNU (and seemingly other BSDs), which has left this test
broken since d2b86fbaa1 ("commit-graph: fix buffer read-overflow",
2019-01-15).
Copying from /dev/null would seek/truncate to seek=$zero_pos and
stop immediately after that (without being able to copy anything),
which is the right way to truncate the file.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Helped-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix widely supported but non-POSIX basic regex syntax introduced in
[1] and [2]. On GNU, NetBSD and FreeBSD the following works:
$ echo xy >f
$ grep 'xy\?' f; echo $?
xy
0
The same goes for "\+". The "?" and "+" syntax is not in the BRE
syntax, just in ERE, but on some implementations it can be invoked by
prefixing the meta-operator with "\", but not on OpenBSD:
Josh Steadmon [Wed, 20 Feb 2019 00:32:26 +0000 (16:32 -0800)]
protocol-capabilities.txt: document symref
In 7171d8c15f ("upload-pack: send symbolic ref information as
capability"), we added a symref capability to the pack protocol, but it
was never documented. Adapt the patch notes from that commit and add
them to the capabilities documentation.
While we're at it, add a disclaimer to the top of
protocol-capabilities.txt noting that the doc only applies to v0/v1 of
the wire protocol.
Signed-off-by: Josh Steadmon <steadmon@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* mk/t5562-no-input-to-too-large-an-input-test:
t5562: do not depend on /dev/zero
Revert "t5562: replace /dev/zero with a pipe from generate_zero_bytes"
Max Kirillov [Sat, 24 Nov 2018 09:37:19 +0000 (11:37 +0200)]
t5562: do not reuse output files
Some expected failures of git-http-backend leaves running its children
(receive-pack or upload-pack) which still hold opened descriptors
to act.err and with some probability they live long enough to write
there their failure messages after next test has already truncated
the files. This causes occasional failures of the test script.
Avoid the issue by using separated output and error file for each test,
apprending the test number to their name.
Reported-by: Carlo Arenas <carenas@gmail.com> Helped-by: Carlo Arenas <carenas@gmail.com> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Max Kirillov <max@max630.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
tests: teach the test-tool to generate NUL bytes and use it
In cc95bc2025 (t5562: replace /dev/zero with a pipe from
generate_zero_bytes, 2019-02-09), we replaced usage of /dev/zero (which
is not available on NonStop, apparently) by a Perl script snippet to
generate NUL bytes.
Sadly, it does not seem to work on NonStop, as t5562 reportedly hangs.
Worse, this also hangs in the Ubuntu 16.04 agents of the CI builds on
Azure Pipelines: for some reason, the Perl script snippet that is run
via `generate_zero_bytes` in t5562's 'CONTENT_LENGTH overflow ssite_t'
test case tries to write out an infinite amount of NUL bytes unless a
broken pipe is encountered, that snippet never encounters the broken
pipe, and keeps going until the build times out.
Oddly enough, this does not reproduce on the Windows and macOS agents,
nor in a local Ubuntu 18.04.
This developer tried for a day to figure out the exact circumstances
under which this hang happens, to no avail, the details remain a
mystery.
In the end, though, what counts is that this here change incidentally
fixes that hang (maybe also on NonStop?). Even more positively, it gets
rid of yet another unnecessary Perl invocation.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Max Kirillov [Fri, 15 Feb 2019 16:42:37 +0000 (18:42 +0200)]
t5562: do not depend on /dev/zero
It was reported [1] that NonStop platform does not have /dev/zero.
The test uses /dev/zero as a dummy input. Passing case (http-backed
failed because of too big input size) should not be reading anything
from it. If http-backend would erroneously try to read any data
returning EOF probably would be even safer than providing some
meaningless data.
Replace /dev/zero with /dev/null to avoid issues with platforms which do
not have /dev/zero.
Junio C Hamano [Tue, 19 Feb 2019 18:18:15 +0000 (10:18 -0800)]
Revert "t5562: replace /dev/zero with a pipe from generate_zero_bytes"
Revert cc95bc20 ("t5562: replace /dev/zero with a pipe from
generate_zero_bytes", 2019-02-09), as not feeding anything to the
command is a better way to test it.
l10n: de.po: consistent translation of 'root commit'
'root commit' is usually translated as 'Root-Commit'. But in one
occasion it‘s translated as 'Basis-Commit' which is the translation
for 'base commit'.
Signed-off-by: Sebastian Staudt <koraktor@gmail.com>
mingw: safe-guard a bit more against getenv() problems
Running up to v2.21.0, we fixed two bugs that were made prominent by the
Windows-specific change to retain copies of only the 30 latest getenv()
calls' returned strings, invalidating any copies of previous getenv()
calls' return values.
While this really shines a light onto bugs of the form where we hold
onto getenv()'s return values without copying them, it is also a real
problem for users.
And even if Jeff King's patches merged via 773e408881 (Merge branch
'jk/save-getenv-result', 2019-01-29) provide further work on that front,
we are far from done. Just one example: on Windows, we unset environment
variables when spawning new processes, which potentially invalidates
strings that were previously obtained via getenv(), and therefore we
have to duplicate environment values that are somehow involved in
spawning new processes (e.g. GIT_MAN_VIEWER in show_man_page()).
We do not have a chance to investigate, let address, all of those issues
in time for v2.21.0, so let's at least help Windows users by increasing
the number of getenv() calls' return values that are kept valid. The
number 64 was determined by looking at the average number of getenv()
calls per process in the entire test suite run on Windows (which is
around 40) and then adding a bit for good measure. And it is a power of
two (which would have hit yesterday's theme perfectly).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King [Thu, 14 Feb 2019 04:38:21 +0000 (23:38 -0500)]
prune: check SEEN flag for reachability
The git-prune command checks reachability by doing a traversal, and then
checking whether a given object exists in the global object hash. This
can yield false positives if any other part of the code had to create an
object struct for some reason. It's not clear whether this is even
possible, but it's more robust to rely on something a little more
concrete: the SEEN flag set by our traversal.
Note that there is a slight possibility of regression here, as we're
relying on mark_reachable_objects() to consistently set the flag.
However, it has always done so, and we're already relying on that fact
in prune_shallow(), which is called as part of git-prune. So this is
making these two parts of the prune operation more consistent.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King [Thu, 14 Feb 2019 04:37:43 +0000 (23:37 -0500)]
prune: use bitmaps for reachability traversal
Pruning generally has to traverse the whole commit graph in order to
see which objects are reachable. This is the exact problem that
reachability bitmaps were meant to solve, so let's use them (if they're
available, of course).
Here are timings on git.git:
Test HEAD^ HEAD
------------------------------------------------------------------------
5304.6: prune with bitmaps 3.65(3.56+0.09) 1.01(0.92+0.08) -72.3%
And on linux.git:
Test HEAD^ HEAD
--------------------------------------------------------------------------
5304.6: prune with bitmaps 35.05(34.79+0.23) 3.00(2.78+0.21) -91.4%
The tests show a pretty optimal case, as we'll have just repacked and
should have pretty good coverage of all refs with our bitmaps. But
that's actually pretty realistic: normally prune is run via "gc" right
after repacking.
A few notes on the implementation:
- the change is actually in reachable.c, so it would improve
reachability traversals by "reflog expire --stale-fix", as well.
Those aren't performed regularly, though (a normal "git gc" doesn't
use --stale-fix), so they're not really worth measuring. There's a
low chance of regressing that caller, since the use of bitmaps is
totally transparent from the caller's perspective.
- The bitmap case could actually get away without creating a "struct
object", and instead the caller could just look up each object id in
the bitmap result. However, this would be a marginal improvement in
runtime, and it would make the callers much more complicated. They'd
have to handle both the bitmap and non-bitmap cases separately, and
in the case of git-prune, we'd also have to tweak prune_shallow(),
which relies on our SEEN flags.
- Because we do create real object structs, we go through a few
contortions to create ones of the right type. This isn't strictly
necessary (lookup_unknown_object() would suffice), but it's more
memory efficient to use the correct types, since we already know
them.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King [Thu, 14 Feb 2019 04:35:22 +0000 (23:35 -0500)]
prune: lazily perform reachability traversal
The general strategy of "git prune" is to do a full reachability walk,
then for each loose object see if we found it in our walk. But if we
don't have any loose objects, we don't need to do the expensive walk in
the first place.
This patch postpones that walk until the first time we need to see its
results.
Note that this is really a specific case of a more general optimization,
which is that we could traverse only far enough to find the object under
consideration (i.e., stop the traversal when we find it, then pick up
again when asked about the next object, etc). That could save us in some
instances from having to do a full walk. But it's actually a bit tricky
to do with our traversal code, and you'd need to do a full walk anyway
if you have even a single unreachable object (which you generally do, if
any objects are actually left after running git-repack).
So in practice this lazy-load of the full walk catches one easy but
common case (i.e., you've just repacked via git-gc, and there's nothing
unreachable).
The perf script is fairly contrived, but it does show off the
improvement:
Test HEAD^ HEAD
-------------------------------------------------------------------------
5304.4: prune with no objects 3.66(3.60+0.05) 0.00(0.00+0.00) -100.0%
and would let us know if we accidentally regress this optimization.
Note also that we need to take special care with prune_shallow(), which
relies on us having performed the traversal. So this optimization can
only kick in for a non-shallow repository. Since this is easy to get
wrong and is not covered by existing tests, let's add an extra test to
t5304 that covers this case explicitly.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Elijah Newren [Thu, 14 Feb 2019 20:25:41 +0000 (12:25 -0800)]
git-rebase.txt: update to reflect merge now implemented on sequencer
Since commit 8fe9c3f21dff (Merge branch 'en/rebase-merge-on-sequencer',
2019-02-06), --merge now uses the interactive backend (and matches its
behavior) so there is no separate merge backend anymore. Fix an
oversight in the docs that should have been updated with the previous
change.
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Todd Zullinger [Thu, 14 Feb 2019 06:35:13 +0000 (01:35 -0500)]
t/lib-httpd: pass GIT_TEST_SIDEBAND_ALL through Apache
07c3c2aa16 ("tests: define GIT_TEST_SIDEBAND_ALL", 2019-01-16) added
GIT_TEST_SIDEBAND_ALL to the apache.conf PassEnv list. Avoid warnings
from Apache when the variable is unset, as we do for GIT_VALGRIND* and
GIT_TRACE, from f628825481 ("t/lib-httpd: handle running under
--valgrind", 2012-07-24) and 89c57ab3f0 ("t: pass GIT_TRACE through
Apache", 2015-03-13), respectively.
Signed-off-by: Todd Zullinger <tmz@pobox.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Thu, 14 Feb 2019 20:16:20 +0000 (12:16 -0800)]
t1404: do not rely on the exact phrasing of strerror()
Not even in C locale, it is wrong to expect that the exact phrasing
"File exists" is used to show EEXIST.
Reported-by: Randall S. Becker <rsbecker@nexbridge.com> Helped-by: Duy Nguyen <pclouds@gmail.com> Helped-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Thu, 14 Feb 2019 02:18:43 +0000 (18:18 -0800)]
Merge branch 'rb/no-dev-zero-in-test'
* rb/no-dev-zero-in-test:
t5562: replace /dev/zero with a pipe from generate_zero_bytes
t5318: replace use of /dev/zero with generate_zero_bytes
test-lib-functions.sh: add generate_zero_bytes function
Junio C Hamano [Thu, 14 Feb 2019 02:18:41 +0000 (18:18 -0800)]
Merge branch 'bc/utf16-portability-fix'
The code and tests assume that the system supplied iconv() would
always use BOM in its output when asked to encode to UTF-16 (or
UTF-32), but apparently some implementations output big-endian
without BOM. A compile-time knob has been added to help such
systems (e.g. NonStop) to add BOM to the output to increase
portability.
* bc/utf16-portability-fix:
utf8: handle systems that don't write BOM for UTF-16
rebase: fix regression in rebase.useBuiltin=false test mode
Fix a recently introduced regression in c762aada1a ("rebase -x: sanity
check command", 2019-01-29) triggered when running the tests with
GIT_TEST_REBASE_USE_BUILTIN=false. See 62c23938fa ("tests: add a
special setup where rebase.useBuiltin is off", 2018-11-14) for how
that test mode works.
As discussed on-list[1] it's not worth it to implement the sanity
check in the legacy rebase code, we plan to remove it after the 2.21
release. So let's do the bare minimum to make the tests pass under the
GIT_TEST_REBASE_USE_BUILTIN=false special setup.
mingw: use a more canonical method to fix the CPU reporting
In `git version --build-options`, we report also the CPU, but in Git for
Windows we actually cross-compile the 32-bit version in a 64-bit Git for
Windows, so we cannot rely on the auto-detected value.
In 3815f64b0dd9 (mingw: fix CPU reporting in `git version
--build-options`, 2019-02-07), we fixed this by a Windows-only
workaround, making use of magic pre-processor constants, which works in
GCC, but most likely not all C compilers.
As pointed out by Eric Sunshine, there is a better way, anyway: to set
the Makefile variable HOST_CPU explicitly for cross-compiled Git. So
let's do that!
Avoid a bug in dash that's been fixed ever since its ec2c84d ("[PARSER] Fix clobbering of checkkwd", 2011-03-15)[1] first
released with dash v0.5.7 in July 2011. This failing test was
introduced in 5f9674243d ("config: add --expiry-date", 2017-11-18).
This fixes 1/2 tests failing on Debian Lenny & Squeeze. The other
failure is due to 1b42f45255 ("git-svn: apply "svn.pathnameencoding"
before URL encoding", 2016-02-09).
The dash bug is triggered by this test because the heredoc contains a
command embedded in "$()" with a "{}" block coming right after
it. Refactoring the "$()" to e.g. be a variable that was set earlier
will also work around it, but let's instead break up the "EOF" and the
"{}".
An earlier version of this patch[2] mitigated the issue by breaking
the "$()" out of the "{}" block, that worked, but just because it
broke up the "EOF" and "{}" block. Putting e.g. "echo &&" between the
two would also work.
projects / thirdparty / git.git / log
