Let's start implementing the `register` command. With this commit,
recommended settings are configured upon `scalar register`, and Git's
background maintenance is started.
The recommended config settings may very well change in the future. For
example, once the built-in FSMonitor is available, we will want to
enable it upon `scalar register`. For that reason, we explicitly support
running `scalar register` in an already-registered enlistment.
Co-authored-by: Victoria Dye <vdye@github.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To test the Scalar command, create a test script in contrib/scalar/t
that is executed as `make -C contrib/scalar test`. Since Scalar has no
meaningful capabilities yet, the only test is rather simple. We will add
more tests in subsequent commits that introduce corresponding, new
functionality.
Note: This test script is intended to test `scalar` only lightly, even
after all of the functionality is implemented.
A more comprehensive functional (or: integration) test suite can be
found at https://github.com/microsoft/scalar; It is used in the workflow
https://github.com/microsoft/git/blob/HEAD/.github/workflows/scalar-functional-tests.yml
in Microsoft's Git fork. This test suite performs end-to-end tests with
a real remote repository, and is run as part of the regular CI and PR
builds in that fork.
Since those tests require some functionality supported only by
Microsoft's Git fork ("GVFS protocol"), there is no intention to port
that fuller test suite to `contrib/scalar/`.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Let's build up the documentation for the Scalar command along with the
patches that implement its functionality.
Note: To discourage the feature-incomplete documentation from being
mistaken for the complete thing, we do not yet provide any way to build
HTML or manual pages from the text file.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The idea of Scalar (https://github.com/microsoft/scalar), and before
that, of VFS for Git, has always been to prove that Git _can_ scale, and
to upstream whatever strategies have been demonstrated to help.
With this patch, we start the journey from that C# project to move what
is left to Git's own `contrib/` directory, reimplementing it in pure C,
with the intention to facilitate integrating the functionality into core
Git all while maintaining backwards-compatibility for existing Scalar
users (which will be much easier when both live in the same worktree).
It has always been the plan to contribute all of the proven strategies
back to core Git.
For example, while the virtual filesystem provided by VFS for Git helped
the team developing the Windows operating system to move onto Git, while
trying to upstream it we realized that it cannot be done: getting the
virtual filesystem to work (which we only managed to implement fully on
Windows, but not on, say, macOS or Linux), and the required server-side
support for the GVFS protocol, made this not quite feasible.
The Scalar project learned from that and tackled the problem with
different tactics: instead of pretending to Git that the working
directory is fully populated, it _specifically_ teaches Git about
partial clone (which is based on VFS for Git's cache server), about
sparse checkout (which VFS for Git tried to do transparently, in the
file system layer), and regularly runs maintenance tasks to keep the
repository in a healthy state.
With partial clone, sparse checkout and `git maintenance` having been
upstreamed, there is little left that `scalar.exe` does which `git.exe`
cannot do. One such thing is that `scalar clone <url>` will
automatically set up a partial, sparse clone, and configure
known-helpful settings from the start.
So let's bring this convenience into Git's tree.
The idea here is that you can (optionally) build Scalar via
make -C contrib/scalar/
This will build the `scalar` executable and put it into the
contrib/scalar/ subdirectory.
The slightly awkward addition of the `contrib/scalar/*` bits to the
top-level `Makefile` are actually really required: we want to link to
`libgit.a`, which means that we will need to use the very same `CFLAGS`
and `LDFLAGS` as the rest of Git.
An early development version of this patch tried to replicate all the
conditional code in `contrib/scalar/Makefile` (e.g. `NO_POLL`) just like
`contrib/svn-fe/Makefile` used to do before it was retired. It turned
out to be quite the whack-a-mole game: the SHA-1-related flags, the
flags enabling/disabling `compat/poll/`, `compat/regex/`,
`compat/win32mmap.c` & friends depending on the current platform... To
put it mildly: it was a major mess.
Instead, this patch makes minimal changes to the top-level `Makefile` so
that the bits in `contrib/scalar/` can be compiled and linked, and
adds a `contrib/scalar/Makefile` that uses the top-level `Makefile` in a
most minimal way to do the actual compiling.
Note: With this commit, we only establish the infrastructure, no
Scalar functionality is implemented yet; We will do that incrementally
over the next few commits.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The Scalar command will be contributed incrementally, over a bunch of
patch series. Let's document what Scalar is about, and then describe the
patch series that are planned.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It has long been practice on this project for a command to emit its
primary output to stdout so that it can be captured to a file or sent
down a pipe, and to emit "chatty" messages (such as those reporting
progress) to stderr so that they don't interfere with the primary
output. However, this practice is not necessarily universal; another
common practice is to send only error messages to stderr, and all other
messages to stdout. Therefore, help newcomers out by documenting how
stdout and stderr are used on this project.
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are certain C99 features that might be nice to use in our code
base, but we've hesitated to do so in order to avoid breaking
compatibility with older compilers. But we don't actually know if
people are even using pre-C99 compilers these days.
One way to figure that out is to introduce a very small use of a
feature, and see if anybody complains, and we've done so to probe
the portability for a few features like "trailing comma in enum
declaration", "designated initializer for struct", and "designated
initializer for array". A few years ago, we tried to use a handy
for (int i = 0; i < n; i++)
use(i);
to introduce a new variable valid only in the loop, but found that
some compilers we cared about didn't like it back then. Two years
is a long-enough time, so let's try it again.
If this patch can survive a few releases without complaint, then we
can feel more confident that variable declaration in for() loop is
supported by the compilers our user base use. And if we do get
complaints, then we'll have gained some data and we can easily
revert this patch.
Helped-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
On iteration, the reflog message is always terminated by a newline. Trim it to
avoid clobbering the console with is this extra newline.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We have some tests that read from files in .git/logs/ hierarchy
when checking if correct reflog entries are created, but that is
too specific to the files backend. Other backends like reftable
may not store its reflog entries in such a "one line per entry"
format.
Update for-each-reflog-ent test helper to produce output that
is identical to lines in a reflog file files backend uses.
That way, (1) the current tests can be updated to use the test
helper to read the reflog entries instead of (parts of) reflog
files, and perform the same inspection for correctness, and (2)
when the ref backend is swapped to another backend, the updated
test can be used as-is to check the correctness.
Adapt t1400 to use the for-each-reflog-ent test helper.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If we are checking for a certain ordering, we should check that there are two
entries. Do this by mirroring the preceding test.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
By convention, reflog messages always end in '\n', so
before we would print blank lines between entries.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Before, --reflog option would look for '\t' in the reflog message. As refs.c
already parses the reflog line, the '\t' was never found, and show-branch
--reflog would always say "(none)" as reflog message
Add test.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It's possible to specify --simplify-by-decoration but not --decorate. In
this case we do respect the simplification, but we don't actually show
any decorations. However, it works by lazy-loading the decorations when
needed; this is discussed in more detail in 0cc7380d88 (log-tree: call
load_ref_decorations() in get_name_decoration(), 2019-09-08).
This works for basic cases, but will fail to respect any --decorate-refs
option (or its variants). Those are handled only when cmd_log_init()
loads the ref decorations up front, which is only when --decorate is
specified explicitly (or as of the previous commit, when the userformat
asks for %d or similar).
We can solve this by making sure to load the decorations if we're going
to simplify using them but they're not otherwise going to be displayed.
The new test shows a simple case that fails without this patch. Note
that we expect two commits in the output: the one we asked for by
--decorate-refs, and the initial commit. The latter is just a quirk of
how --simplify-by-decoration works. Arguably it may be a bug, but it's
unrelated to this patch (which is just about the loading of the
decorations; you get the same behavior before this patch with an
explicit --decorate).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In order to show ref decorations, we first have to load them. If you
run:
git log --decorate
then git-log will recognize the option and load them up front via
cmd_log_init(). Likewise if log.decorate is set.
If you don't say --decorate explicitly, but do mention "%d" or "%D" in
the output format, like so:
git log --format=%d
then this also works, because we lazy-load the ref decorations. This has
been true since 3b3d443feb (add '%d' pretty format specifier to show
decoration, 2008-09-04), though the lazy-load was later moved into
log-tree.c.
But there's one problem: that lazy-load just uses the defaults; it
doesn't take into account any --decorate-refs options (or its exclude
variant, or their config). So this does not work:
git log --decorate-refs=whatever --format=%d
It will decorate using all refs, not just the specified ones. This has
been true since --decorate-refs was added in 65516f586b (log: add option
to choose which refs to decorate, 2017-11-21). Adding further confusion
is that it _may_ work because of the auto-decoration feature. If that's
in use (and it often is, as it's the default), then if the output is
going to stdout, we do enable decorations early (and so load them up
front, respecting the extra options). But otherwise we do not. So:
git log --decorate-refs=whatever --format=%d >some-file
would typically behave differently than it does when the output goes to
the pager or terminal!
The solution is simple: we should recognize in cmd_log_init() that we're
going to show decorations, and make sure we load them there. We already
check userformat_find_requirements(), so we can couple this with our
existing code there.
There are two new tests. The first shows off the actual fix. The second
makes sure that our fix doesn't cause us to stomp on an existing
--decorate option (see the new comment in the code, as well).
Reported-by: Josh Rampersad <josh.rampersad@voiceflow.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Refuse to force-move a branch over the currently checked out branch of
any working tree, not just the current one.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A bare repository won’t have a working tree at "..", but it may still
have separate working trees created with git worktree. We should protect
the current branch of such working trees from being updated or deleted,
according to receive.denyCurrentBranch.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
update_worktree() can only be called with a non-NULL worktree parameter,
because that’s the only case where we set do_update_worktree = 1.
worktree->path is always initialized to non-NULL.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Refuse to fetch into the currently checked out branch of any working
tree, not just the current one.
Fixes this previously reported bug:
https://lore.kernel.org/git/cb957174-5e9a-5603-ea9e-ac9b58a2eaad@mathema.de/
As a side effect of using find_shared_symref, we’ll also refuse the
fetch when we’re on a detached HEAD because we’re rebasing or bisecting
on the branch in question. This seems like a sensible change.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Storing the worktrees list in a static variable meant that
find_shared_symref() had to rebuild the list on each call (which is
inefficient when the call site is in a loop), and also that each call
invalidated the pointer returned by the previous call (which is
confusing).
Instead, make it the caller’s responsibility to pass in the worktrees
list and manage its lifetime.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/CodingGuidelines says “do not end error messages with a
full stop” and “do not capitalize the first word”. Clean up existing
messages, some of which we will be touching in later steps in the
series, that deviate from these rules in this file, as a preparation for
the main part of the topic.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/CodingGuidelines says “do not end error messages with a
full stop” and “do not capitalize the first word”. Clean up existing
messages, some of which we will be touching in later steps in the
series, that deviate from these rules in this file, as a preparation for
the main part of the topic.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/CodingGuidelines says “do not end error messages with a
full stop” and “do not capitalize the first word”. Clean up existing
messages, some of which we will be touching in later steps in the
series, that deviate from these rules in this file, as a preparation for
the main part of the topic.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
BAIL_OUT() is meant to abort the whole test run and print a message with
a standard prefix that can be parsed to stdout. Since for every test the
normal fd`s are redirected in test_eval_ this output would not be seen
when used within the context of a test or prereq like we do in
test_have_prereq(). To make this function work in these contexts we move
the setup of the fd aliases a few lines up before the first use of
BAIL_OUT() and then have this function always print to the alias.
Signed-off-by: Fabian Stelzer <fs@gigacodes.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The C99 standard was released in January 1999, now 22 years ago. It
provides a variety of useful features, including variadic arguments for
macros, declarations after statements, designated initializers, and a
wide variety of other useful features, many of which we already use.
We'd like to take advantage of these features, but we want to be
cautious. As far as we know, all major compilers now support C99 or a
later C standard, such as C11 or C17. POSIX has required C99 support as
a requirement for the 2001 revision, so we can safely assume any POSIX
system which we are interested in supporting has C99.
Even MSVC, long a holdout against modern C, now supports both C11 and
C17 with an appropriate update. Moreover, even if people are using an
older version of MSVC on these systems, they will generally need some
implementation of the standard Unix utilities for the testsuite, and GNU
coreutils, the most common option, has required C99 since 2009.
Therefore, we can safely assume that a suitable version of GCC or clang
is available to users even if their version of MSVC is not sufficiently
capable.
Let's add a test balloon to git-compat-util.h to see if anyone is using
an older compiler. We'll add a comment telling people how to enable
this functionality on GCC and Clang, even though modern versions of both
will automatically do the right thing, and ask people still experiencing
a problem to report that to us on the list.
Note that C89 compilers don't provide the __STDC_VERSION__ macro, so we
use a well-known hack of using "- 0". On compilers with this macro, it
doesn't change the value, and on C89 compilers, the macro will be
replaced with nothing, and our value will be 0.
For sparse, we explicitly request the gnu99 style because we've
traditionally taken advantage of some GCC- and clang-specific extensions
when available and we'd like to retain the ability to do that. sparse
also defaults to C89 without it, so things will fail for us if we don't.
Update the cmake configuration to require C11 for MSVC. We do this
because this will make MSVC to use C11, since it does not explicitly
support C99. We do this with a compiler options because setting the
C_STANDARD option does not work in our CI on MSVC and at the moment, we
don't want to require C11 for Unix compilers.
In the Makefile, don't set any compiler flags for the compiler itself,
since on some systems, such as FreeBSD, we actually need C11, and asking
for C99 causes things to fail to compile. The error message should make
it obvious what's going wrong and allow a user to set the appropriate
option when building in the event they're using a Unix compiler that
doesn't support it by default.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Visual Studio reports C4334 "was 64-bit shift intended" warning because
of size miss-match.
Promote unity to the matching type to fit with the assignment.
Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Visual Studio reports C4334 "was 64-bit shift intended" warning
because of size miss-match.
Promote unity to the matching type to fit with its subsequent operation.
Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Visual Studio reports C4334 "was 64-bit shift intended" warning
because of size mismatch.
Promote unity to the matching type to fit with the `&` operator.
Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"zdiff3" is identical to ordinary diff3 except that it allows compaction
of common lines on the two sides of history at the beginning or end of
the conflict hunk. For example, the following diff3 conflict:
1
2
3
4
<<<<<<
A
B
C
D
E
||||||
5
6
======
A
X
C
Y
E
>>>>>>
7
8
9
has common lines 'A', 'C', and 'E' on the two sides. With zdiff3, one
would instead get the following conflict:
1
2
3
4
A
<<<<<<
B
C
D
||||||
5
6
======
X
C
Y
>>>>>>
E
7
8
9
Note that the common lines, 'A', and 'E' were moved outside the
conflict. Unlike with the two-way conflicts from the 'merge'
conflictStyle, the zdiff3 conflict is NOT split into multiple conflict
regions to allow the common 'C' lines to be shown outside a conflict,
because zdiff3 shows the base version too and the base version cannot be
reasonably split.
Note also that the removing of lines common to the two sides might make
the remaining text inside the conflict region match the base text inside
the conflict region (for example, if the diff3 conflict had '5 6 E' on
the right side of the conflict, then the common line 'E' would be moved
outside and both the base and right side's remaining conflict text would
be the lines '5' and '6'). This has the potential to surprise users and
make them think there should not have been a conflict, but there
definitely was a conflict and it should remain.
Based-on-patch-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Co-authored-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `--exec <cmd>` is documented as
Append "exec <cmd>" after each line creating a commit in the final
history.
...
If --autosquash is used, "exec" lines will not be appended for the
intermediate commits, and will only appear at the end of each
squash/fixup series.
Unfortunately, it would also add exec commands after non-pick
operations, such as 'no-op', which could be seen for example with
git rebase -i --exec true HEAD
todo_list_add_exec_commands() intent was to insert exec commands after
each logical pick, while trying to consider a chains of fixup and squash
commits to be part of the pick before it. So it would keep an 'insert'
boolean tracking if it had seen a pick or merge, but not write the exec
command until it saw the next non-fixup/squash command. Since that
would make it miss the final exec command, it had some code that would
check whether it still needed to insert one at the end, but instead of a
simple
if (insert)
it had a
if (insert || <condition that is always true>)
That's buggy; as per the docs, we should only add exec commands for
lines that create commits, i.e. only if insert is true. Fix the
conditional.
There was one testcase in the testsuite that we tweak for this change;
it was introduced in 54fd3243da ("rebase -i: reread the todo list if
`exec` touched it", 2017-04-26), and was merely testing that after an
exec had fired that the todo list would be re-read. The test at the
time would have worked given any revision at all, though it would only
work with 'HEAD' as a side-effect of this bug. Since we're fixing this
bug, choose something other than 'HEAD' for that test.
Finally, add a testcase that verifies when we have no commits to pick,
that we get no exec lines in the generated todo list.
Reported-by: Nikita Bobko <nikitabobko@gmail.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The clean/smudge conversion code path has been prepared to better
work on platforms where ulong is narrower than size_t.
* mc/clean-smudge-with-llp64:
clean/smudge: allow clean filters to process extremely large files
odb: guard against data loss checking out a huge file
git-compat-util: introduce more size_t helpers
odb: teach read_blob_entry to use size_t
t1051: introduce a smudge filter test for extremely large files
test-lib: add prerequisite for 64-bit platforms
test-tool genzeros: generate large amounts of data more efficiently
test-genzeros: allow more than 2G zeros in Windows
Make a few helper functions unused and then lose them.
* ab/sh-retire-helper-functions:
git-sh-setup: remove "sane_grep", it's not needed anymore
git-sh-setup: remove unused sane_egrep() function
git-instaweb: unconditionally assume that gitweb is mod_perl capable
Makefile: remove $(NO_CURL) from $(SCRIPT_DEFINES)
Makefile: remove $(GIT_VERSION) from $(SCRIPT_DEFINES)
Makefile: move git-SCRIPT-DEFINES adjacent to $(SCRIPT_DEFINES)
The command line complation for "git send-email" options have been
tweaked to make it easier to keep it in sync with the command itself.
* tp/send-email-completion:
send-email docs: add format-patch options
send-email: programmatically generate bash completions
The compatibility implementation for unsetenv(3) were written to
mimic ancient, non-POSIX, variant seen in an old glibc; it has been
changed to return an integer to match the more modern era.
* jc/unsetenv-returns-an-int:
unsetenv(3) returns int, not void
Things like "git -c branch.sort=bogus branch new HEAD", i.e. the
operation modes of the "git branch" command that do not need the
sort key information, no longer errors out by seeing a bogus sort
key.
* jc/fix-ref-sorting-parse:
for-each-ref: delay parsing of --sort=<atom> options
"git stash" learned the "--staged" option to stash away what has
been added to the index (and nothing else).
* so/stash-staged:
stash: get rid of unused argument in stash_staged()
stash: implement '--staged' option for 'push' and 'save'
Teach and encourage first-time contributors to this project to
state the base commit when they submit their topic.
* jc/tutorial-format-patch-base:
MyFirstContribution: teach to use "format-patch --base=auto"
The "remainder" of hn/refs-errno-cleanup topic.
* ab/refs-errno-cleanup: (21 commits)
refs API: post-migration API renaming [2/2]
refs API: post-migration API renaming [1/2]
refs API: don't expose "errno" in run_transaction_hook()
refs API: make expand_ref() & repo_dwim_log() not set errno
refs API: make resolve_ref_unsafe() not set errno
refs API: make refs_ref_exists() not set errno
refs API: make refs_resolve_refdup() not set errno
refs tests: ignore ignore errno in test-ref-store helper
refs API: ignore errno in worktree.c's find_shared_symref()
refs API: ignore errno in worktree.c's add_head_info()
refs API: make files_copy_or_rename_ref() et al not set errno
refs API: make loose_fill_ref_dir() not set errno
refs API: make resolve_gitlink_ref() not set errno
refs API: remove refs_read_ref_full() wrapper
refs/files: remove "name exist?" check in lock_ref_oid_basic()
reflog tests: add --updateref tests
refs API: make refs_rename_ref_available() static
refs API: make parse_loose_ref_contents() not set errno
refs API: make refs_read_raw_ref() not set errno
refs API: add a version of refs_resolve_ref_unsafe() with "errno"
...
Allow "git status --porcelain=v2" to show the number of stash
entries with --show-stash like the normal output does.
* ow/stash-count-in-status-porcelain-output:
status: print stash info with --porcelain=v2 --show-stash
status: count stash entries in separate function
Treat "_" as any other URL-valid characters in an URL when matching
the per-URL configuration variable names.
* jk/loosen-urlmatch:
urlmatch: add underscore to URL_HOST_CHARS
The files backend uses file system locking on individual refs, which means a
directory/file conflict can prevent locks being taken. For example, in a repo
with just the ref "foo", an update
(DELETE "foo") + (ADD "foo/bar")
cannot be executed in the files backend, as one cannot take a lock on foo/bar.
The current reftable proof-of-concept integration supports these tranactions, as
the result is a repo with just "foo/bar", which has no directory/file conflict.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* vd/sparse-reset:
unpack-trees: improve performance of next_cache_entry
reset: make --mixed sparse-aware
reset: make sparse-aware (except --mixed)
reset: integrate with sparse index
reset: expand test coverage for sparse checkouts
sparse-index: update command for expand/collapse test
reset: preserve skip-worktree bit in mixed reset
reset: rename is_missing to !is_in_reset_tree
To find the first non-unpacked cache entry, `next_cache_entry` iterates
through index, starting at `cache_bottom`. The performance of this in full
indexes is helped by `cache_bottom` advancing with each invocation of
`mark_ce_used` (called by `unpack_index_entry`). However, the presence of
sparse directories can prevent the `cache_bottom` from advancing in a sparse
index case, effectively forcing `next_cache_entry` to search from the
beginning of the index each time it is called.
The `cache_bottom` must be preserved for the sparse index (see 17a1bb570b
(unpack-trees: preserve cache_bottom, 2021-07-14)). Therefore, to retain the
benefit `cache_bottom` provides in non-sparse index cases, a separate `hint`
position indicates the first position `next_cache_entry` should search,
updated each execution with a new position.
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Remove the `ensure_full_index` guard on `read_from_tree` and update `git
reset --mixed` to ensure it can use sparse directory index entries wherever
possible. Sparse directory entries are reset using `diff_tree_oid`, which
requires `change` and `add_remove` functions to process the internal
contents of the sparse directory. The `recursive` diff option handles cases
in which `reset --mixed` must diff/merge files that are nested multiple
levels deep in a sparse directory.
The use of pathspecs with `git reset --mixed` introduces scenarios in which
internal contents of sparse directories may be matched by the pathspec. In
order to reset *all* files in the repo that may match the pathspec, the
following conditions on the pathspec require index expansion before
performing the reset:
* "magic" pathspecs
* wildcard pathspecs that do not match only in-cone files or entire sparse
directories
* literal pathspecs matching something outside the sparse checkout
definition
Helped-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Remove `ensure_full_index` guard on `prime_cache_tree` and update
`prime_cache_tree_rec` to correctly reconstruct sparse directory entries in
the cache tree. While processing a tree's entries, `prime_cache_tree_rec`
must determine whether a directory entry is sparse or not by searching for
it in the index (*without* expanding the index). If a matching sparse
directory index entry is found, no subtrees are added to the cache tree
entry and the entry count is set to 1 (representing the sparse directory
itself). Otherwise, the tree is assumed to not be sparse and its subtrees
are recursively added to the cache tree.
Helped-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Disable `command_requires_full_index` repo setting and add
`ensure_full_index` guards around code paths that cannot yet use sparse
directory index entries. `reset --soft` does not modify the index, so no
compatibility changes are needed for it to function without expanding the
index. For all other reset modes (`--mixed`, `--hard`, `--keep`, `--merge`),
the full index is expanded to prevent cache tree corruption and invalid
variable accesses.
Additionally, the `read_cache()` check verifying an uncorrupted index is
moved after argument parsing and preparing the repo settings. The index is
not used by the preceding argument handling, but `read_cache()` must be run
*after* enabling sparse index for the command (so that the index is not
expanded unnecessarily) and *before* using the index for reset (so that it
is verified as uncorrupted).
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add new tests for `--merge` and `--keep` modes, as well as mixed reset with
pathspecs. New performance test cases exercise various execution paths for
`reset`.
Co-authored-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The previous change modified GIT_TRACE2_EVENT_NESTING by default within
test-lib.sh. These custom assignments throughout the test suite are no
longer necessary.
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Derrick Stolee