SZEDER Gábor [Thu, 27 Jun 2019 13:42:48 +0000 (15:42 +0200)]
rebase: fix garbled progress display with '-x'
When running a command with the 'exec' instruction during an
interactive rebase session, or for a range of commits using 'git
rebase -x', the output can be a bit garbled when the name of the
command is short enough:
Note the ')' at the end of the last line. It gets more garbled as the
range of commits increases:
$ git rebase -x true HEAD~50
Executing: true)
[ repeated 3 more times ]
Executing: true0)
[ repeated 44 more times ]
Executing: true00)
Successfully rebased and updated refs/heads/master.
Those extra numbers and ')' are remnants of the previously displayed
"Rebasing (N/M)" progress lines that are usually completely
overwritten by the "Executing: <cmd>" lines, unless 'cmd' is short and
the "N/M" part is long.
Make sure that the previously displayed "Rebasing (N/M)" line is
cleared by using the term_clear_line() helper function added in the
previous patch. Do so only when not being '--verbose', because in
that case these "Rebasing (N/M)" lines are not printed as progress
(i.e. as lines with '\r' at the end), but as "regular" output (with
'\n' at the end).
A couple of other rebase commands print similar messages, e.g.
"Stopped at <abbrev-oid>... <subject>" for the 'edit' or 'break'
commands, or the "Successfully rebased and updated <full-ref>." at the
very end. These are so long that they practically always overwrite
that "Rebasing (N/M)" progress line, but let's be prudent, and clear
the last line before printing these, too.
In 't3420-rebase-autostash.sh' two helper functions prepare the
expected output of four tests that check the full output of 'git
rebase' and thus are affected by this change, so adjust their
expectations to account for the new line clearing.
Note that this patch doesn't completely eliminate the possibility of
similar garbled outputs, e.g. some error messages from rebase or the
"Auto-merging <file>" message from within the depths of the merge
machinery might not be long enough to completely cover the last
"Rebasing (N/M)" line. This patch doesn't do anything about them,
because dealing with them individually would result in way too much
churn, while having a catch-all term_clear_line() call in the common
code path of pick_commits() would hide the "Rebasing (N/M)" line way
too soon, and it would either flicker or be invisible.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Many Win32 API functions actually exist in two variants: one with
the `A` suffix that takes ANSI parameters (`char *` or `const char *`)
and one with the `W` suffix that takes Unicode parameters (`wchar_t *`
or `const wchar_t *`).
The ANSI variant assumes that the strings are encoded according to
whatever is the current locale. This is not what Git wants to use on
Windows: we assume that `char *` variables point to strings encoded in
UTF-8.
There is a pseudo UTF-8 locale on Windows, but it does not work
as one might expect. In addition, if we overrode the user's locale, that
would modify the behavior of programs spawned by Git (such as editors,
difftools, etc), therefore we cannot use that pseudo locale.
Further, it is actually highly encouraged to use the Unicode versions
instead of the ANSI versions, so let's do precisely that.
Note: when calling the Win32 API functions _without_ any suffix, it
depends whether the `UNICODE` constant is defined before the relevant
headers are #include'd. Without that constant, the ANSI variants are
used. Let's be explicit and avoid that ambiguity.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
mingw: embed a manifest to trick UAC into Doing The Right Thing
On Windows >= Vista, not having an application manifest with a
requestedExecutionLevel can cause several kinds of confusing behavior.
The first and more obvious behavior is "Installer Detection" of the
"User Account Control" (also known as "UAC") feature, where Windows
sometimes decides (by looking at things like the file name and even
sequences of bytes within the executable) that an executable is an
installer and should run elevated (causing the well-known popup dialog
to appear). In Git's context, subcommands such as "git patch-id" or "git
update-index" fall prey to this behavior.
The second and more confusing behavior is "File Virtualization". It
means that when files are written without having write permission, it
does not fail (as expected), but they are instead redirected to
somewhere else. When the files are read, the original contents are
returned, though, not the ones that were just written somewhere else.
Even more confusing, not all write accesses are redirected; Trying to
write to write-protected .exe files, for example, will fail instead of
redirecting.
In addition to being unwanted behavior, File Virtualization causes
dramatic slowdowns in Git (see for instance
http://code.google.com/p/msysgit/issues/detail?id=320).
A third unwanted behavior of Windows >= Vista is that it lies about the
Windows version when calling `GetWindowsVersionEx()`.
There are two ways to prevent these unwanted behaviors: Either you embed
an application manifest (which really is an XML document conforming to a
specific schema) within all your executables, or you add an external
manifest (a file with the same name followed by `.manifest`) to all your
executables. Since Git's builtins are hardlinked (or copied), it is
simpler and more robust to embed a manifest.
Recent enough MSVC compilers already embed a working internal manifest,
and building with mingw-w64 (which is the case in Git for Windows' SDK)
does it, too, but for MinGW you have to do so by hand.
In any case, it is better to be explicit about this manifest, that way
changes in the compiler toolchain won't surprise us (as mingw-w64 once
did when it broke `GetWindowsVersionEx()` by mistake).
References:
- New UAC Technologies for Windows Vista
http://msdn.microsoft.com/en-us/library/bb756960.aspx
- Create and Embed an Application Manifest (UAC)
http://msdn.microsoft.com/en-us/library/bb756929.aspx
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
To reduce Git for Windows' attack surface, we started using the Address
Space Layout Randomization and Data Execution Prevention features in ce6a158561f9 (mingw: enable DEP and ASLR, 2019-05-08).
To remove yet another attack vector, let's make use of gcc's stack
smashing protector that helps detect stack buffer overruns early.
Rather than using -fstack-protector, we use -fstack-protector-strong
because on Windows: The latter appears to strike a better balance
between the performance impact and the provided safety.
In a non-scientific test (time git log --grep=is -p), best of 5 timings
went from 23.009s to 22.997s, i.e. the performance impact was *well*
lost in the noise.
This fixes https://github.com/git-for-windows/git/issues/501
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
an apparent typo for the environment variable was included with 81567caf87
("trace2: update docs to describe system/global config settings",
2019-04-15), and was missed when renamed variables by e4b75d6a1d
("trace2: rename environment variables to GIT_TRACE2*", 2019-05-19)
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Phillip Wood [Thu, 27 Jun 2019 14:12:46 +0000 (07:12 -0700)]
status: do not report errors in sequencer/todo
commit 4a72486de9 ("fix cherry-pick/revert status after commit",
2019-04-16) used parse_insn_line() to parse the first line of the todo
list to check if it was a pick or revert. However if the todo list is
left over from an old cherry-pick or revert and references a commit that
no longer exists then parse_insn_line() prints an error message which is
confusing for users [1]. Instead parse just the command name so that the
user is alerted to the presence of stale sequencer state by status
reporting that a cherry-pick or revert is in progress.
Note that we should not be leaving stale sequencer state lying around
(or at least not as often) after commit b07d9bfd17 ("commit/reset: try
to clean up sequencer state", 2019-04-16). However the user may still
have stale state that predates that commit.
Also avoid printing an error message if for some reason the user has a
file called `sequencer` in $GIT_DIR.
Phillip Wood [Thu, 27 Jun 2019 14:12:45 +0000 (07:12 -0700)]
sequencer: factor out todo command name parsing
Factor out the code that parses the name of the command at the start of
each line in the todo file into its own function so that it can be used
in the next commit.
As I don't want to burden other callers with having to pass in a pointer
to the end of the line the test for an abbreviated command is
changed. This change should not affect the behavior. Instead of testing
`eol == bol + 1` the new code checks for the end of the line by testing
for '\n', '\r' or '\0' following the abbreviated name. To avoid reading
past the end of an empty string it also checks that there is actually a
single character abbreviation before testing if it matches. This
prevents it from matching '\0' as the abbreviated name and then trying
to read another character.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Phillip Wood [Thu, 27 Jun 2019 14:12:44 +0000 (07:12 -0700)]
sequencer: always allow tab after command name
The code that parses the todo list allows an unabbreviated command name
to be followed by a space or a tab, but if the command name is
abbreviated it only allows a space after it. Fix this inconsistency.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jonathan Tan [Wed, 5 Jun 2019 19:26:24 +0000 (12:26 -0700)]
t5551: test usage of chunked encoding explicitly
When run using GIT_TEST_PROTOCOL_VERSION=2, a test in t5551 fails
because 4 POSTs (probe, ls-refs, probe, fetch) are sent instead of 2
(probe, fetch).
One way to resolve this would be to relax the condition (from "= 2" to
greater than 1, say), but upon further inspection, the test probably
shouldn't be counting the number of POSTs. This test states that large
requests are split across POSTs, but this is not correct; the main
change is that chunked transfer encoding is used, but the request is
still contained within one POST. (The test coincidentally works because
Git indeed sends 2 POSTs in the case of a large request, but that is
because, as stated above, the first POST is a probing RPC - see
post_rpc() in remote-curl.c for more information.)
Therefore, instead of counting POSTs, check that chunked transfer
encoding is used. This also has the desirable side effect of passing
with GIT_TEST_PROTOCOL_VERSION=2.
Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Acked-by: Derrick Stolee <dstolee@microsoft.com> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:39 +0000 (15:40 +0200)]
Move core_partial_clone_filter_default to promisor-remote.c
Now that we can have a different default partial clone filter for
each promisor remote, let's hide core_partial_clone_filter_default
as a static in promisor-remote.c to avoid it being use for
anything other than managing backward compatibility.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:38 +0000 (15:40 +0200)]
Move repository_format_partial_clone to promisor-remote.c
Now that we have has_promisor_remote() and can use many
promisor remotes, let's hide repository_format_partial_clone
as a static in promisor-remote.c to avoid it being use
for anything other than managing backward compatibility.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:37 +0000 (15:40 +0200)]
Remove fetch-object.{c,h} in favor of promisor-remote.{c,h}
As fetch_objects() is now used only in promisor-remote.c
and should't be used outside it, let's move it into
promisor-remote.c, make it static there, and remove
fetch-object.{c,h}.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:35 +0000 (15:40 +0200)]
partial-clone: add multiple remotes in the doc
While at it, let's remove a reference to ODB effort as the ODB
effort has been replaced by directly enhancing partial clone
and promisor remote features.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:34 +0000 (15:40 +0200)]
t0410: test fetching from many promisor remotes
This shows that it is now possible to fetch objects from more
than one promisor remote, and that fetching from a new
promisor remote can configure it as one.
Helped-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
As the infrastructure for more than one promisor remote
has been introduced in previous patches, we can remove
code that forbids the registration of more than one
promisor remote.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:31 +0000 (15:40 +0200)]
Use promisor_remote_get_direct() and has_promisor_remote()
Instead of using the repository_format_partial_clone global
and fetch_objects() directly, let's use has_promisor_remote()
and promisor_remote_get_direct().
This way all the configured promisor remotes will be taken
into account, not only the one specified by
extensions.partialClone.
Also when cloning or fetching using a partial clone filter,
remote.origin.promisor will be set to "true" instead of
setting extensions.partialClone to "origin". This makes it
possible to use many promisor remote just by fetching from
them.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:30 +0000 (15:40 +0200)]
promisor-remote: use repository_format_partial_clone
A remote specified using the extensions.partialClone config
option should be considered a promisor remote too.
For simplicity and to make things predictable, this promisor
remote should be either always the last one we try to get
objects from, or the first one. So it should always be either
at the end of the promisor remote list, or at its start.
We decided to make it the last one we try, because it is
likely that someone using many promisor remotes is doing so
because the other promisor remotes are better for some reason
(maybe they are closer or faster for some kind of objects)
than the origin, and the origin is likely to be the remote
specified by extensions.partialClone.
This justification is not very strong, but one choice had to
be made, and anyway the long term plan should be to make the
order somehow fully configurable.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This is implemented for now by calling fetch_objects(). It fetches
from all the promisor remotes.
Helped-by: Ramsay Jones <ramsay@ramsayjones.plus.com> Helped-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:27 +0000 (15:40 +0200)]
Add initial support for many promisor remotes
The promisor-remote.{c,h} files will contain functions to
manage many promisor remotes.
We expect that there will not be a lot of promisor remotes,
so it is ok to use a simple linked list to manage them.
Helped-by: Jeff King <peff@peff.net> Helped-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Tue, 25 Jun 2019 13:40:25 +0000 (15:40 +0200)]
t0410: remove pipes after git commands
Let's not run a git command, especially one with "verify" in its
name, upstream of a pipe, because the pipe will hide the git
command's exit code.
While at it, let's also avoid a useless `cat` command piping
into `sed`.
Helped-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
SZEDER Gábor [Mon, 24 Jun 2019 12:44:46 +0000 (14:44 +0200)]
t5551: use 'test_i18ngrep' to check translated output
The two tests 'invalid Content-Type rejected' and 'server-side error
detected' in 't5551-http-fetch-smart.sh' use "plain" 'grep' to check
that 'git clone' failed with the expected error message, but the
messages they are checking are translated, and, consequently, these
tests fail when the test script is run with GIT_TEST_GETTEXT_POISON
enabled.
Use 'test_i18ngrep' instead.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
leads to an error stating that the option --<option> is unknown to
submodule--helper. That is of course only, when <option> is not a valid
option for git submodule foreach.
The reason for this is, that above call is internally translated into a
call to submodule--helper:
This call starts by executing the subcommand with its option inside the
first level submodule and continues by calling the next iteration of
the submodule foreach call
inside the first level submodule. Note that the double dash in front of
the subcommand is missing.
This problem starts to arise only recently, as the
PARSE_OPT_KEEP_UNKNOWN flag for the argument parsing of git submodule
foreach was removed in commit a282f5a906. Hence, the unknown option is
complained about now, as the argument parsing is not properly ended by
the double dash.
This commit fixes the problem by adding the double dash in front of the
subcommand during the recursion.
Signed-off-by: Morian Sonnet <moriansonnet@googlemail.com> Acked-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Tue, 25 Jun 2019 14:49:42 +0000 (07:49 -0700)]
msvc: ignore .dll and incremental compile output
Ignore .dll files copied into the top-level directory.
Ignore MSVC incremental compiler output files.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
For regular debugging, it is pretty helpful when a debug assertion in a
running application triggers a window that offers to start the debugger.
However, when running the test suite, it is not so helpful, in
particular when the debug assertions are then suppressed anyway because
we disable the invalid parameter checking (via invalidcontinue.obj, see
the comment in config.mak.uname about that object for more information).
So let's simply disable that window in Debug Mode (it is already
disabled in Release Mode).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Tue, 25 Jun 2019 14:49:41 +0000 (07:49 -0700)]
msvc: do not pretend to support all signals
This special-cases various signals that are not supported on Windows,
such as SIGPIPE. These cause the UCRT to throw asserts (at least in
debug mode).
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Philip Oakley [Tue, 25 Jun 2019 14:49:40 +0000 (07:49 -0700)]
msvc: add pragmas for common warnings
MSVC can be overzealous about some warnings. Disable them.
Signed-off-by: Philip Oakley <philipoakley@iee.org> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Tue, 25 Jun 2019 14:49:40 +0000 (07:49 -0700)]
msvc: add a compile-time flag to allow detailed heap debugging
MS Visual C comes with a few neat features we can use to analyze the
heap consumption (i.e. leaks, max memory, etc).
With this patch, we introduce support via the build-time flag
`USE_MSVC_CRTDBG`.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Tue, 25 Jun 2019 14:49:39 +0000 (07:49 -0700)]
msvc: support building Git using MS Visual C++
With this patch, Git can be built using the Microsoft toolchain, via:
make MSVC=1 [DEBUG=1]
Third party libraries are built from source using the open source
"vcpkg" tool set. See https://github.com/Microsoft/vcpkg
On a first build, the vcpkg tools and the third party libraries are
automatically downloaded and built. DLLs for the third party libraries
are copied to the top-level (and t/helper) directory to facilitate
debugging. See compat/vcbuild/README.
A series of .bat files are invoked by the Makefile to find the location
of the installed version of Visual Studio and the associated compiler
tools (essentially replicating the environment setup performed by a
"Developer Command Prompt"). This should find the most recent VS2015 or
VS2017 installation. Output from these scripts are used by the Makefile
to define compiler and linker pathnames and -I and -L arguments.
The build produces .pdb files for both debug and release builds.
Note: This commit was squashed from an organic series of commits
developed between 2016 and 2018 in Git for Windows' `master` branch.
This combined commit eliminates the obsolete commits related to fetching
NuGet packages for third party libraries. It is difficult to use NuGet
packages for C/C++ sources because they may be built by earlier versions
of the MSVC compiler and have CRT version and linking issues.
Additionally, the C/C++ NuGet packages that we were using tended to not
be updated concurrently with the sources. And in the case of cURL and
OpenSSL, this could expose us to security issues.
Helped-by: Yue Lin Ho <b8732003@student.nsysu.edu.tw> Helped-by: Philip Oakley <philipoakley@iee.org> Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
SZEDER Gábor [Mon, 24 Jun 2019 18:13:16 +0000 (20:13 +0200)]
pager: add a helper function to clear the last line in the terminal
There are a couple of places where we want to clear the last line on
the terminal, e.g. when a progress bar line is overwritten by a
shorter line, then the end of that progress line would remain visible,
unless we cover it up.
In 'progress.c' we did this by always appending a fixed number of
space characters to the next line (even if it was not shorter than the
previous), but as it turned out that fixed number was not quite large
enough, see the fix in 9f1fd84e15 (progress: clear previous progress
update dynamically, 2019-04-12). From then on we've been keeping
track of the length of the last displayed progress line and appending
the appropriate number of space characters to the next line, if
necessary, but, alas, this approach turned out to be error prone, see
the fix in 1aed1a5f25 (progress: avoid empty line when breaking the
progress line, 2019-05-19). The next patch in this series is about to
fix a case where we don't clear the last line, and on occasion do end
up with such garbage at the end of the line. It would be great if we
could do that without the need to deal with that without meticulously
computing the necessary number of space characters.
So add a helper function to clear the last line on the terminal using
an ANSI escape sequence, which has the advantage to clear the whole
line no matter how wide it is, even after the terminal width changed.
Such an escape sequence is not available on dumb terminals, though, so
in that case fall back to simply print a whole terminal width (as
reported by term_columns()) worth of space characters.
In 'editor.c' launch_specified_editor() already used this ANSI escape
sequence, so replace it with a call to this function.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
SZEDER Gábor [Mon, 24 Jun 2019 18:13:15 +0000 (20:13 +0200)]
t3404: make the 'rebase.missingCommitsCheck=ignore' test more focused
The test 'rebase -i respects rebase.missingCommitsCheck = warn' is
mainly interested in the warning about the dropped commits, but it
checks the whole output of 'git rebase', including progress lines and
what not that are not at all relevant to 'rebase.missingCommitsCheck',
but make it necessary to update this test whenever e.g. the way we
show progress is updated (as it will happen in one of the later
patches of this series).
Modify the test to verify only the first four lines of 'git rebase's
output that contain all the important lines, notably the line
containing the "Warning:" itself and the oneline log of the dropped
commit.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
SZEDER Gábor [Mon, 24 Jun 2019 18:13:14 +0000 (20:13 +0200)]
t3404: modernize here doc style
In 't3404-rebase-interactive.sh' the expected output of several tests
is prepared from here documents, which are outside of
'test_expect_success' blocks and have spaces around redirection
operators.
Move these here documents into the corresponding 'test_expect_success'
block and avoid spaces between filename and redition operators.
Furthermore, quote the here docs' delimiter word to prevent parameter
expansions and what not, where applicable.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
René Scharfe [Sat, 22 Jun 2019 10:03:40 +0000 (12:03 +0200)]
config: simplify parsing of unit factors
Just return the value of the factor or zero for unrecognized strings
instead of using an output reference and a separate return value to
indicate success. This is shorter and simpler.
It basically reverts that function to before c8deb5a146 ("Improve error
messages when int/long cannot be parsed from config", 2007-12-25), while
keeping the better messages, so restore its old name, get_unit_factor(),
as well.
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
René Scharfe [Sat, 22 Jun 2019 10:03:36 +0000 (12:03 +0200)]
config: don't multiply in parse_unit_factor()
parse_unit_factor() multiplies the number that is passed to it with the
value of a recognized unit factor (K, M or G for 2^10, 2^20 and 2^30,
respectively). All callers pass in 1 as a number, though, which allows
them to check the actual multiplication for overflow before they are
doing it themselves.
Ignore the passed in number and don't multiply, as this feature of
parse_unit_factor() is not used anymore. Rename the output parameter to
reflect that it's not about the end result anymore, but just about the
unit factor.
Suggested-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
René Scharfe [Sat, 22 Jun 2019 10:03:30 +0000 (12:03 +0200)]
config: use unsigned_mult_overflows to check for overflows
parse_unit_factor() checks if a K, M or G is present after a number and
multiplies it by 2^10, 2^20 or 2^30, respectively. One of its callers
checks if the result is smaller than the number alone to detect
overflows. The other one passes 1 as the number and does multiplication
and overflow check itself in a similar manner.
This works, but is inconsistent, and it would break if we added support
for a bigger unit factor. E.g. 16777217T is 2^64 + 2^40, i.e. too big
for a 64-bit number. Modulo 2^64 we get 2^40 == 1TB, which is bigger
than the raw number 16777217 == 2^24 + 1, so the overflow would go
undetected by that method.
Let both callers pass 1 and handle overflow check and multiplication
themselves. Do the check before the multiplication, using
unsigned_mult_overflows, which is simpler and can deal with larger unit
factors.
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
On a case-insensitive filesystem, such as HFS+ or NTFS, it is possible
that the idea Bash has of the current directory differs in case from
what Git thinks it is. That's totally okay, though, and we should not
expect otherwise.
On Windows, for example, when you call
cd C:\GIT-SDK-64
in a PowerShell and there exists a directory called `C:\git-sdk-64`, the
current directory will be reported in all upper-case. Even in a Bash
that you might call from that PowerShell. Git, however, will have
normalized this via `GetFinalPathByHandle()`, and the expectation in
t0001 that the recorded gitdir will match what `pwd` says will be
violated.
Let's address this by comparing these paths in a case-insensitive
manner when `core.ignoreCase` is `true`.
Reported by Jameson Miller.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Christian Couder [Sat, 22 Jun 2019 06:10:35 +0000 (08:10 +0200)]
doc: improve usage string in MyFirstContribution
We implement a command called git-psuh which accept arguments, so let's
show that it accepts arguments in the doc and the usage string.
While at it, we need to prepare "a NULL-terminated array of usage strings",
not just "a NULL-terminated usage string".
Helped-by: Emily Shaffer <emilyshaffer@google.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix a couple of tests that would potentially fail under
GIT_TEST_FAIL_PREREQS=true.
I missed these when annotating other tests in dfe1a17df9 ("tests: add
a special setup where prerequisites fail", 2019-05-13) because on my
system I can only reproduce this failure when I run the tests as
"root", since the tests happen to depend on whether we can fall back
on GECOS info or not. I.e. they'd usually fail to look up the ident
info anyway, but not always.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Fri, 21 Jun 2019 18:24:11 +0000 (11:24 -0700)]
Merge branch 'an/ignore-doc-update'
The description about slashes in gitignore patterns (used to
indicate things like "anchored to this level only" and "only
matches directories") has been revamped.
* an/ignore-doc-update:
gitignore.txt: make slash-rules more readable
Junio C Hamano [Fri, 21 Jun 2019 18:24:09 +0000 (11:24 -0700)]
Merge branch 'md/list-objects-filter-memfix'
The filter_data used in the list-objects-filter (which manages a
lazily sparse clone repository) did not use the dynamic array API
correctly---'nr' is supposed to point at one past the last element
of the array in use. This has been corrected.
* md/list-objects-filter-memfix:
list-objects-filter: correct usage of ALLOC_GROW
"git fetch" into a lazy clone forgot to fetch base objects that are
necessary to complete delta in a thin packfile, which has been
corrected.
* jt/partial-clone-missing-ref-delta-base:
t5616: cover case of client having delta base
t5616: use correct flag to check object is missing
index-pack: prefetch missing REF_DELTA bases
t5616: refactor packfile replacement
Change the GIT_TEST_FAIL_PREREQS variable from being "non-empty?" to
being a more standard boolean variable. I recently added the variable
in dfe1a17df9 ("tests: add a special setup where prerequisites fail",
2019-05-13), having to add another "non-empty?" special-case is what
prompted me to write the "git env--helper" utility being used here.
Converting this one is a bit tricky since we use it so early and
frequently in the guts of the test code itself, so let's set a
GIT_TEST_FAIL_PREREQS_INTERNAL which can be tested with the old "test
-n" for the purposes of the shell code, and change the user-exposed
and documented GIT_TEST_FAIL_PREREQS variable to a boolean.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
tests: replace test_tristate with "git env--helper"
The test_tristate helper introduced in 83d842dc8c ("tests: turn on
network daemon tests by default", 2014-02-10) can now be better
implemented with "git env--helper" to give the variables in question
the standard boolean behavior.
The reason for the "tristate" was to have all of false/true/auto,
where "auto" meant either "false" or "true" depending on what the
fallback was. With the --default option to "git env--helper" we can
simply have e.g. GIT_TEST_HTTPD where we know if it's true because the
user asked explicitly ("true"), or true implicitly ("auto").
This breaks backwards compatibility for explicitly setting "auto" for
these variables, but I don't think anyone cares. That was always
intended to be internal.
This means the test_normalize_bool() code in test-lib-functions.sh
goes away in addition to test_tristate(). We still need the
test_skip_or_die() helper, but now it takes the variable name instead
of the value, and uses "git env--bool" to distinguish a default "true"
from an explicit "true" (in those "explicit true" cases we want to
fail the test in question).
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
tests README: re-flow a previously changed paragraph
A previous change to the "GIT_TEST_GETTEXT_POISON" variable left this
paragraph needing to be re-flowed. Let's do that in this separate
change to make it easy to see that there's no change here when viewed
with "--word-diff".
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Change the GIT_TEST_GETTEXT_POISON variable from being "non-empty?" to
being a more standard boolean variable.
Since it needed to be checked in both C code and shellscript (via test
-n) it was one of the remaining shellscript-like variables. Now that
we have "env--helper" we can change that.
There's a couple of tricky edge cases that arise because we're using
git_env_bool() early, and the config-reading "env--helper".
If GIT_TEST_GETTEXT_POISON is set to an invalid value die_bad_number()
will die, but to do so it would usually call gettext(). Let's detect
the special case of GIT_TEST_GETTEXT_POISON and always emit that
message in the C locale, lest we infinitely loop.
As seen in the updated tests in t0017-env-helper.sh there's also a
caveat related to "env--helper" needing to read the config for trace2
purposes.
Since the C_LOCALE_OUTPUT prerequisite is lazy and relies on
"env--helper" we could get invalid results if we failed to read the
config (e.g. because we'd loop on includes) when combined with
e.g. "test_i18ngrep" wanting to check with "env--helper" if
GIT_TEST_GETTEXT_POISON was true or not.
I'm crossing my fingers and hoping that a test similar to the one I
removed in the earlier "config tests: simplify include cycle test"
change in this series won't happen again, and testing for this
explicitly in "env--helper"'s own tests.
This change breaks existing uses of
e.g. GIT_TEST_GETTEXT_POISON=YesPlease, which we've documented in
po/README and other places. As noted in [1] we might want to consider
also accepting "YesPlease" in "env--helper" as a special-case.
But as the lack of uproar over 6cdccfce1e ("i18n: make GETTEXT_POISON
a runtime option", 2018-11-08) demonstrates the audience for this
option is a really narrow set of git developers, who shouldn't have
much trouble modifying their test scripts, so I think it's better to
deal with that minor headache now and make all the relevant GIT_TEST_*
variables boolean in the same way than carry the "YesPlease"
special-case forward.
Change test code added in c0234b2ef6 ("stat_tracking_info(): clear
object flags used during counting", 2008-07-03) to stop using the
"script" variable also used for lazy prerequisites in
test-lib-functions.sh.
Since this test uses test_i18ncmp and expects to use its own "script"
variable twice it implicitly depends on the C_LOCALE_OUTPUT
prerequisite not being a lazy prerequisite. A follow-up change will
make it a lazy prerequisite, so we must remove this landmine before
inadvertently stepping on it as we make that change.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
config.c: refactor die_bad_number() to not call gettext() early
Prepare die_bad_number() for a change to specially handle
GIT_TEST_GETTEXT_POISON calling git_env_bool() by making
die_bad_number() not call gettext() early, which would in turn call
git_env_bool().
There's no meaningful change here yet, just a re-arrangement of the
current code to make that subsequent change easier to read.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
env--helper: new undocumented builtin wrapping git_env_*()
We have many GIT_TEST_* variables that accept a <boolean> because
they're implemented in C, and then some that take <non-empty?> because
they're implemented at least partially in shellscript.
Add a helper that wraps git_env_bool() and git_env_ulong() as the
first step in fixing this. This isn't being added as a test-tool mode
because some of these are used outside the test suite.
Part of what this tool does can be done via a trick with "git config"
added in 83d842dc8c ("tests: turn on network daemon tests by default",
2014-02-10) for test_tristate(), i.e.:
But as subsequent changes will show being able to pass along the
default value makes all the difference, and we'll be able to replace
test_tristate() itself with that.
The --type=bool option will be used by subsequent patches, but not
--type=ulong. I figured it was easy enough to add it & test for it so
I left it in so we'd have wrappers for both git_env_*() functions, and
to have a template to make it obvious how we'd add --type=int etc. if
it's needed in the future.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Derrick Stolee [Tue, 18 Jun 2019 20:25:28 +0000 (13:25 -0700)]
pull: add --[no-]show-forced-updates passthrough
The 'git fetch' command can avoid calculating forced updates, so
allow users of 'git pull' to provide that option. This is particularly
necessary when the advice to use '--no-show-forced-updates' is given
at the end of the command.
Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Derrick Stolee [Tue, 18 Jun 2019 20:25:27 +0000 (13:25 -0700)]
fetch: warn about forced updates in branch listing
The --[no-]show-forced-updates option in 'git fetch' can be confusing
for some users, especially if it is enabled via config setting and not
by argument. Add advice to warn the user that the (forced update)
messages were not listed.
Additionally, warn users when the forced update check takes longer
than ten seconds, and recommend that they disable the check. These
messages can be disabled by the advice.fetchShowForcedUpdates config
setting.
Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Derrick Stolee [Tue, 18 Jun 2019 20:25:26 +0000 (13:25 -0700)]
fetch: add --[no-]show-forced-updates argument
After updating a set of remove refs during a 'git fetch', we walk the
commits in the new ref value and not in the old ref value to discover
if the update was a forced update. This results in two things happening
during the command:
1. The line including the ref update has an additional "(forced-update)"
marker at the end.
2. The ref log for that remote branch includes a bit saying that update
is a forced update.
For many situations, this forced-update message happens infrequently, or
is a small bit of information among many ref updates. Many users ignore
these messages, but the calculation required here slows down their fetches
significantly. Keep in mind that they do not have the opportunity to
calculate a commit-graph file containing the newly-fetched commits, so
these comparisons can be very slow.
Add a '--[no-]show-forced-updates' option that allows a user to skip this
calculation. The only permanent result is dropping the forced-update bit
in the reflog.
Include a new fetch.showForcedUpdates config setting that allows this
behavior without including the argument in every command. The config
setting is overridden by the command-line arguments.
Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Tue, 18 Jun 2019 20:21:28 +0000 (13:21 -0700)]
status: ignore status.aheadbehind in porcelain formats
Teach porcelain V[12] formats to ignore the status.aheadbehind
config setting. They only respect the --[no-]ahead-behind
command line argument. This is for backwards compatibility
with existing scripts.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Tue, 18 Jun 2019 20:21:27 +0000 (13:21 -0700)]
status: warn when a/b calculation takes too long
The ahead/behind calculation in 'git status' can be slow in some
cases. Users may not realize that there are ways to avoid this
computation, especially if they are not using the information.
Add a warning that appears if this calculation takes more than
two seconds. The warning can be disabled through the new config
setting advice.statusAheadBehind.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Tue, 18 Jun 2019 20:21:25 +0000 (13:21 -0700)]
status: add status.aheadbehind setting
The --[no-]ahead-behind option was introduced in fd9b544a
(status: add --[no-]ahead-behind to status and commit for V2
format, 2018-01-09). This is a necessary change of behavior
in repos where the remote tracking branches can move very
quickly ahead of the local branches. However, users need to
remember to provide the command-line argument every time.
Add a new "status.aheadBehind" config setting to change the
default behavior of all git status formats.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
John Lin [Tue, 4 Jun 2019 14:02:21 +0000 (07:02 -0700)]
status: remove the empty line after hints
Before this patch, there is inconsistency between the status
messages with hints and the ones without hints: there is an
empty line between the title and the file list if hints are
presented, but there isn't one if there are no hints.
This patch remove the inconsistency by removing the empty
lines even if hints are presented.
Signed-off-by: John Lin <johnlinp@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Simplify an overly verbose test added in 9b25a0b52e ("config: add
include directive", 2012-02-06). The "expect" file was never used, and
by using .gitconfig it's not as intuitive to reproduce this manually
with "-d" as some other tests, since HOME needs to be set in the
environment.
Also remove the use of test_i18ngrep added in a769bfc74f ("config.c:
mark more strings for translation", 2018-07-21) in favor of overriding
the GIT_TEST_GETTEXT_POISON value.
Using the i18n test wrappers hasn't been needed since my 6cdccfce1e ("i18n: make GETTEXT_POISON a runtime option", 2018-11-08).
As a follow-up change to the yet-to-be-added t0017-env-helper.sh will
show, doing it this way can hide a regression when combined with
trace2's early config reading. That early config reading was added in bce9db6de9 ("trace2: use system/global config for default trace2
settings", 2019-04-15).
So let's remove the testing for that potential regression here, I'll
instead add it explicitly to t0017-env-helper.sh in a follow-up
change.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Wed, 19 Jun 2019 21:06:06 +0000 (14:06 -0700)]
msvc: update Makefile to allow for spaces in the compiler path
It is quite common that MS Visual C++ is installed into a location whose
path contains spaces, therefore we need to quote it.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Wed, 19 Jun 2019 21:06:05 +0000 (14:06 -0700)]
msvc: fix detect_msys_tty()
The ntstatus.h header is only available in MINGW.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Wed, 19 Jun 2019 21:06:04 +0000 (14:06 -0700)]
msvc: define ftello()
It is just called differently in MSVC's headers.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Wed, 19 Jun 2019 21:06:03 +0000 (14:06 -0700)]
msvc: do not re-declare the timespec struct
VS2015's headers already declare that struct.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Wed, 19 Jun 2019 21:06:02 +0000 (14:06 -0700)]
msvc: mark a variable as non-const
VS2015 complains when using a const pointer in memcpy()/free().
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Philip Oakley [Wed, 19 Jun 2019 21:06:02 +0000 (14:06 -0700)]
msvc: define O_ACCMODE
This constant is not defined in MSVC's headers.
In UCRT's fcntl.h, _O_RDONLY, _O_WRONLY and _O_RDWR are defined as 0, 1
and 2, respectively. Yes, that means that UCRT breaks with the tradition
that O_RDWR == O_RDONLY | O_WRONLY.
It is a perfectly legal way to define those constants, though, therefore
we need to take care of defining O_ACCMODE accordingly.
This is particularly important in order to keep our "open() can set
errno to EISDIR" emulation working: it tests that (flags & O_ACCMODE) is
not identical to O_RDONLY before going on to test specifically whether
the file for which open() reported EACCES is, in fact, a directory.
Signed-off-by: Philip Oakley <philipoakley@iee.org> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Philip Oakley [Wed, 19 Jun 2019 21:06:01 +0000 (14:06 -0700)]
msvc: include sigset_t definition
On MSVC (VS2008) sigset_t is not defined.
Signed-off-by: Philip Oakley <philipoakley@iee.org> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git for Windows has special code to retrieve the command-line parameters
(and even the environment) in UTF-16 encoding, so that they can be
converted to UTF-8. This is necessary because Git for Windows wants to
use UTF-8 encoded strings throughout its code, and the main() function
does not get the parameters in that encoding.
To do that, we used the __wgetmainargs() function, which is not even a
Win32 API function, but provided by the MINGW "runtime" instead.
Obviously, this method would not work with any compiler other than GCC,
and in preparation for compiling with Visual C++, we would like to avoid
precisely that.
Lucky us, there is a much more elegant way: we can simply implement the
UTF-16 variant of `main()`: `wmain()`.
To make that work, we need to link with -municode. The command-line
parameters are passed to `wmain()` encoded in UTF-16, as desired, and
this method also works with GCC, and also with Visual C++ after
adjusting the MSVC linker flags to force it to use `wmain()`.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler [Wed, 19 Jun 2019 21:05:58 +0000 (14:05 -0700)]
cache-tree/blame: avoid reusing the DEBUG constant
In MS Visual C, the `DEBUG` constant is set automatically whenever
compiling with debug information.
This is clearly not what was intended in `cache-tree.c` nor in
`builtin/blame.c`, so let's use a less ambiguous name there.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Just like the natural line ending for Unix shell scripts consist of a
single Line Feed, the natural line ending for (DOS) Batch scripts
consists of a Carriage Return followed by a Line Feed.
It seems that both Unix shell script interpreters and the interpreter
for Batch scripts (`cmd.exe`) are keen on seeing the "right" line
endings.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The msysGit project (i.e. Git for Windows 1.x' SDK) is safely dead for
*years* already. This is probably the reason why nobody caught this typo
until Carlo Arenas spotted a copy-edited version of it nearby.
It is probably about time to rip out the remainders of msysGit/MSys1
support, but that can safely wait a bit longer, and we can at least fix
the typo for now.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
fetch-pack: print server version at the top in -v -v
Before the previous patch, the server version is printed after all the
"Server supports" lines. The previous one puts the version in the middle
of "Server supports" group.
Instead of moving it to the bottom, I move it to the top. Version may
stand out more at the top as we will have even more debug out after
capabilities.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
fetch-pack: print all relevant supported capabilities with -v -v
When we check if some capability is supported, we do print something in
verbose mode. Some capabilities are not printed though (and it made me
think it's not supported; I was more used to GIT_TRACE_PACKET) so let's
print them all.
It's a bit more code. And one could argue for printing all supported
capabilities the server sends us. But I think it's still valuable this
way because we see the capabilities that the client cares about.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
fetch-pack: move capability names out of i18n strings
This reduces the work on translators since they only have one string to
translate (and I think it's still enough context to translate). It also
makes sure no capability name is translated by accident.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Barret Rhoden [Thu, 20 Jun 2019 16:38:19 +0000 (12:38 -0400)]
blame: use the fingerprint heuristic to match ignored lines
This commit integrates the fuzzy fingerprint heuristic into
guess_line_blames().
We actually make two passes. The first pass uses the fuzzy algorithm to
find a match within the current diff chunk. If that fails, the second
pass searches the entire parent file for the best match.
For an example of scanning the entire parent for a match, consider:
That's because commit X actually consists of two chunks: one chunk is
removing sys/header_a.h, then some context, and the second chunk is
adding sys/header_a.h.
Michael Platings [Thu, 20 Jun 2019 16:38:18 +0000 (12:38 -0400)]
blame: add a fingerprint heuristic to match ignored lines
This algorithm will replace the heuristic used to identify lines from
ignored commits with one that finds likely candidate lines in the
parent's version of the file. The actual replacement occurs in an
upcoming commit.
The old heuristic simply assigned lines in the target to the same line
number (plus offset) in the parent. The new function uses a
fingerprinting algorithm to detect similarity between lines.
The new heuristic is designed to accurately match changes made
mechanically by formatting tools such as clang-format and clang-tidy.
These tools make changes such as breaking up lines to fit within a
character limit or changing identifiers to fit with a naming convention.
The heuristic is not intended to match more extensive refactoring
changes and may give misleading results in such cases.
In most cases formatting tools preserve line ordering, so the heuristic
is optimised for such cases. (Some types of changes do reorder lines
e.g. sorting keep the line content identical, the git blame -M option
can already be used to address this). The reason that it is advantageous
to rely on ordering is due to source code repeating the same character
sequences often e.g. declaring an identifier on one line and using that
identifier on several subsequent lines. This means that lines can look
very similar to each other which presents a problem when doing fuzzy
matching. Relying on ordering gives us extra clues to point towards the
true match.
The heuristic operates on a single diff chunk change at a time. It
creates a “fingerprint” for each line on each side of the change.
Fingerprints are described in detail in the comment for `struct
fingerprint`, but essentially are a multiset of the character pairs in a
line. The heuristic first identifies the line in the target entry whose
fingerprint is most clearly matched to a line fingerprint in the parent
entry. Where fingerprints match identically, the position of the lines
is used as a tie-break. The heuristic locks in the best match, and
subtracts the fingerprint of the line in the target entry from the
fingerprint of the line in the parent entry to prevent other lines being
matched on the same parts of that line. It then repeats the process
recursively on the section of the chunk before the match, and then the
section of the chunk after the match.
Here's an example of the difference the fingerprinting makes. Consider
a file with two commits:
Note line 2 could be matched with either commit-a or commit-b as it is
equally similar to both lines, but is matched with commit-a because its
position as a fraction of the new line range is more similar to commit-a
as a fraction of the old line range. Line 4 is also equally similar to
both lines, but as it appears after line 3 which will be matched first
it cannot be matched with an earlier line.
For many more examples, see t/t8014-blame-ignore-fuzzy.sh which contains
example parent and target files and the line numbers in the parent that
must be matched.
Signed-off-by: Michael Platings <michael@platin.gs> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Even though dwim is enabled by default, it will never be done when
--detached is specified. If you force "-d --guess" you will get an error
because --guess then implies -c which cannot be used with -d. So we can
disable dwim in "switch -d". It makes the completion list in this case a
bit shorter.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
In c45f0f525d (switch: reject if some operation is in progress,
2019-03-29), a check is added to prevent switching when some operation
is in progress. The reason is it's often not safe to do so.
This is true for merge, am, rebase, cherry-pick and revert, but not so
much for bisect because bisecting is basically jumping/switching between
a bunch of commits to pin point the first bad one. git-bisect suggests
the next commit to test, but it's not wrong for the user to test a
different commit because git-bisect cannot have the knowledge to know
better.
For this reason, allow to switch when bisecting (*). I considered if we
should still prevent switching by default and allow it with
--ignore-in-progress. But I don't think the prevention really adds
anything much.
If the user switches away by mistake, since we print the previous HEAD
value, even if they don't know about the "-" shortcut, switching back is
still possible.
The warning will be printed on every switch while bisect is still
ongoing, not the first time you switch away from bisect's suggested
commit, so it could become a bit annoying.
(*) of course when it's safe to do so, i.e. no loss of local changes and
stuff.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
projects / thirdparty / git.git / log
