The idiom (a + b < a) works fine for detecting that an unsigned
integer has overflowed, but a more explicit
unsigned_add_overflows(a, b)
might be easier to read.
Define such a macro, expanding roughly to ((a) < UINT_MAX - (b)).
Because the expansion uses each argument only once outside of sizeof()
expressions, it is safe to use with arguments that have side effects.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Here is a 'feature' command for streams to use to require support for
the notemodify (N) command.
When the 'feature' facility was introduced (v1.7.0-rc0~95^2~4,
2009-12-04), the notes import feature was old news (v1.6.6-rc0~21^2~8,
2009-10-09) and it was not obvious it deserved to be a named feature.
But now that is clear, since all major non-git fast-import backends
lack support for it.
Details: on git version with this patch applied, any "feature notes"
command in the features/options section at the beginning of a stream
will be treated as a no-op. On fast-import implementations without
the feature (and older git versions), the command instead errors out
with a message like
This version of fast-import does not support feature notes.
So by declaring use of notes at the beginning of a stream, frontends
can avoid wasting time and other resources when the backend does not
support notes. (This would be especially important for backends that
do not support rewinding history after a botched import.)
Improved-by: Thomas Rast <trast@student.ethz.ch> Improved-by: Sverre Rabbelier <srabbelier@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
fast-import: clarify documentation of "feature" command
The "feature" command allows streams to specify options for the import
that must not be ignored. Logically, they are part of the stream,
even though technically most supported features are synonyms to
command-line options.
Make this more obvious by being more explicit about how the analogy
between most "feature" commands and command-line options works. Treat
the feature (import-marks) that does not fit this analogy separately.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Acked-by: Sverre Rabbelier <srabbelier@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
pull: Document the "--[no-]recurse-submodules" options
In commits be254a0ea9 and 7dce19d374 the handling of the new fetch options
"--[no-]recurse-submodules" had been added to git-pull.sh. But they were
not documented as the pull options they now are, so let's fix that.
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Attempting to include quote.h without first including strbuf.h results
in warnings:
./quote.h:33:33: warning: ‘struct strbuf’ declared inside parameter list
./quote.h:33:33: warning: its scope is only this definition or declaration, which is probably not what you want
./quote.h:34:34: warning: ‘struct strbuf’ declared inside parameter list
...
Add a toplevel declaration for struct strbuf to avoid this.
While at it, stop including system headers from quote.h. git source
files already need to include git-compat-util.h sooner to ensure the
appropriate feature test macros are defined.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Cached object store was added in d66b37b (Add pretend_sha1_file()
interface. - 2007-02-04) as a way to temporarily inject some objects
to object store.
But only read_sha1_file() knows about this store. While it will return
an object from this store, sha1_object_info() will happily say
"object not found".
Teach sha1_object_info() about the cached store for consistency.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git diff --cached" (without revision) used to mean "git diff --cached
HEAD" (i.e. the user was too lazy to type HEAD). This "correctly"
failed when there was no commit yet. But was that correctness useful?
This patch changes the definition of what particular command means.
It is a request to show what _would_ be committed without further "git
add". The internal implementation is the same "git diff --cached HEAD"
when HEAD exists, but when there is no commit yet, it compares the index
with an empty tree object to achieve the desired result.
Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
t4120-apply-popt: help systems with core.filemode=false
A test case verifies that filemode-only patches work as expected. Help
systems where "test -x" does not work by applying the test patch also to
the index, where the effects can be verified even on such systems.
Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
start_command: flush buffers in the WIN32 code path as well
The POSIX code path did The Right Thing already, but we have to do the same
on Windows.
This bug caused failures in t5526-fetch-submodules, where the output of
'git fetch --recurse-submodules' was in the wrong order.
Debugged-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
git-bundle first appeared in 2e0afafe ("Add git-bundle") in Feb 2007,
and first shipped in Git 1.5.1.
However, OFS_DELTA is an even earlier invention, coming about in eb32d236 ("introduce delta objects with offset to base") in Sep 2006,
and first shipped in Git 1.4.4.5.
OFS_DELTA is smaller, about 3.2%-5% smaller, and is typically faster
to access than REF_DELTA because the exact location of the delta base
is available after parsing the object header. Since all bundle aware
versions of Git are also OFS_DELTA aware, just make it the default.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
When there is a random garbage file whose name happens to be 38-byte
long in a .git/objects/??/ directory, the loop terminated prematurely
without marking all the other files that it hasn't checked in the
readdir() loop.
Treat such a file just like any other garbage file, and do not break out
of the readdir() loop.
While at it, replace repeated sprintf() calls to a single one outside the
loop.
Don't pass "--xhtml" to hightlight in gitweb.perl script.
The "--xhtml" option is supported only in highlight < 3.0. There is no option
to enforce (X)HTML output format compatible with both highlight < 3.0 and
highlight >= 3.0. However default output format is HTML so we don't need to
explicitly specify it.
Signed-off-by: Adam Tkac <atkac@redhat.com> Helped-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* maint:
rebase -i: clarify in-editor documentation of "exec"
tests: sanitize more git environment variables
fast-import: treat filemodify with empty tree as delete
rebase: give a better error message for bogus branch
rebase: use explicit "--" with checkout
rebase -i: clarify in-editor documentation of "exec"
The hints in the current "instruction sheet" template look like so:
# Rebase 3f14246..a1d7e01 onto 3f14246
#
# Commands:
# p, pick = use commit
# r, reword = use commit, but edit the commit message
# e, edit = use commit, but stop for amending
# s, squash = use commit, but meld into previous commit
# f, fixup = like "squash", but discard this commit's log message
# x <cmd>, exec <cmd> = Run a shell command <cmd>, and stop if it fails
#
# If you remove a line here THAT COMMIT WILL BE LOST.
# However, if you remove everything, the rebase will be aborted.
#
This does not make it clear that the format of each line is
<insn> <commit id> <explanatory text that will be printed>
but the reader will probably infer that from the automatically
generated pick examples above it.
What about the "exec" instruction? By analogy, I might imagine that
the format of that line is "exec <command> <explanatory text>", and
the "x <cmd>" hint does not address that question (at first I read it
as taking an argument <cmd> that is the name of a shell). Meanwhile,
the mention of <cmd> makes the hints harder to scan as a table.
So remove the <cmd> and add some words to remind the reader that
"exec" runs a command named by the rest of the line. To make room, it
is left to the manpage to explain that that command is run using
$SHELL and that nonzero status from that command will pause the
rebase.
Wording from Junio.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
fast-import: treat filemodify with empty tree as delete
Normal git processes do not allow one to build a tree with an empty
subtree entry without trying hard at it. This is in keeping with the
general UI philosophy: git tracks content, not empty directories.
v1.7.3-rc0~75^2 (2010-06-30) changed that by making it easy to include
an empty subtree in fast-import's active commit:
One can trigger this by reading an empty tree (for example, the tree
corresponding to an empty root commit) and trying to move it to a
subtree. It is better and more closely analogous to 'git read-tree
--prefix' to treat such commands as requests to remove the subtree.
Noticed-by: David Barr <david.barr@cordelta.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
rebase: give a better error message for bogus branch
When you give a non-existent branch to git-rebase, it spits
out the usage. This can be confusing, since you may
understand the usage just fine, but simply have made a
mistake in the branch name.
Before:
$ git rebase origin bogus
Usage: git rebase ...
After:
$ git rebase origin bogus
fatal: no such branch: bogus
Usage: git rebase ...
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
In the case of a ref/pathname conflict, checkout will
already do the right thing and checkout the ref. However,
for a non-existant ref, this has two advantages:
1. If a file with that pathname exists, rebase will
refresh the file from the index and then rebase the
current branch instead of producing an error.
2. If no such file exists, the error message using an
explicit "--" is better:
# before
$ git rebase -i origin bogus
error: pathspec 'bogus' did not match any file(s) known to git.
Could not checkout bogus
# after
$ git rebase -i origin bogus
fatal: invalid reference: bogus
Could not checkout bogus
The problems seem to be trigger-able only through "git
rebase -i", as regular git-rebase checks the validity of the
branch parameter as a ref very early on. However, it doesn't
hurt to be defensive.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* jn/setup-fixes:
t1510: fix typo in the comment of a test
Documentation updates for 'GIT_WORK_TREE without GIT_DIR' historical usecase
Subject: setup: officially support --work-tree without --git-dir
tests: compress the setup tests
tests: cosmetic improvements to the repo-setup test
t/README: hint about using $(pwd) rather than $PWD in tests
Fix expected values of setup tests on Windows
Subject: setup: officially support --work-tree without --git-dir
The original intention of --work-tree was to allow people to work in a
subdirectory of their working tree that does not have an embedded .git
directory. Because their working tree, which their $cwd was in, did not
have an embedded .git, they needed to use $GIT_DIR to specify where it is,
and because this meant there was no way to discover where the root level
of the working tree was, so we needed to add $GIT_WORK_TREE to tell git
where it was.
However, this facility has long been (mis)used by people's scripts to
start git from a working tree _with_ an embedded .git directory, let git
find .git directory, and then pretend as if an unrelated directory were
the associated working tree of the .git directory found by the discovery
process. It happens to work in simple cases, and is not worth causing
"regression" to these scripts.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation: do not treat reset --keep as a special case
The current treatment of "git reset --keep" emphasizes how it
differs from --hard (treatment of local changes) and how it breaks
down into plumbing (git read-tree -m -u HEAD <commit> followed by git
update-ref HEAD <commit>). This can discourage people from using
it, since it might seem to be a complex or niche option.
Better to emphasize what the --keep flag is intended for --- moving
the index and worktree from one commit to another, like "git checkout"
would --- so the reader can make a more informed decision about the
appropriate situations in which to use it.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The errno check added in commit 3ba7a06 "A loose object is not corrupt
if it cannot be read due to EMFILE" only checked for whether errno is
not ENOENT and thus incorrectly treated "no error" as an error
condition.
Because of that, it never reached the code path that would report that
the object is corrupted and instead caused funny errors like:
- setup_repo, to initialize a repository or gitfile pointing to a
repository, with core.bare and core.worktree set as specified;
- try_case, to run setup from a given directory and validate the
result, with GIT_DIR and GIT_WORK_TREE set as specified;
- try_repo, to initialize a repository and call "try_case" from the
toplevel and a subdirectory;
- run_wt_tests, to run a battery of tests that check for sane
behavior when GIT_WORK_TREE is set to various positions relative to
the .git dir and cwd.
Use these helpers to make the test shorter, less repetitive, and (one
hopes) easier to understand and modify.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* rj/maint-test-fixes:
t9501-*.sh: Fix a test failure on Cygwin
lib-git-svn.sh: Add check for mis-configured web server variables
lib-git-svn.sh: Avoid setting web server variables unnecessarily
t9142: Move call to start_httpd into the setup test
t3600-rm.sh: Don't pass a non-existent prereq to test #15
* ak/describe-exact:
describe: Delay looking up commits until searching for an inexact match
describe: Store commit_names in a hash table by commit SHA1
describe: Do not use a flex array in struct commit_name
describe: Use for_each_rawref
Documentation/fast-import: put explanation of M 040000 <dataref> "" in context
Omit needless words ("Additionally ... <path> may also" is redundant).
While at it, place the explanation of this special case after the
general rules for paths to provide the reader with some context.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
In particular, on systems that define uint32_t as an unsigned long,
gcc complains as follows:
CC vcs-svn/svndump.o
vcs-svn/svndump.c: In function `svndump_read':
vcs-svn/svndump.c:215: warning: int format, uint32_t arg (arg 2)
In order to suppress the warning we use the C99 format specifier
macro PRIu32 from <inttypes.h>.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Acked-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Instead of stripping space characters past the beginning of the
line and overflowing a buffer, stop at the beginning of the line
(mimicking the corresponding fix in remote-fd).
The argument to isspace does not need to be cast explicitly because
git isspace takes care of that already.
Noticed-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
- first data
- then functions
- then test assertions
Mark up inline test vectors as
cat >vector <<-\EOF
data
data
EOF
for visual scannability. Use words like "set up" for tests that set
up for other tests, to make it obvious which tests are safe to skip.
Use repeated function calls instead of a loop for the
language-specific tests, so the invocations can be easily tweaked
individually (for example if one starts to fail).
This means if you add a new subdirectory to t4034/, it will not be
automatically used. I think that's worth it for the added
explicitness.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
git's diff-words support has a detail that can be a little dangerous:
any text not matched by a given language's tokenization pattern is
treated as whitespace and changes in such text would go unnoticed.
Therefore each of the built-in regexes allows a special token type
consisting of a single non-whitespace character [^[:space:]].
To make sure UTF-8 sequences remain human readable, the builtin
regexes also have a special token type for runs of bytes with the high
bit set. In English, non-ASCII characters are usually isolated so
this is analogous to the [^[:space:]] pattern, except it matches a
single _multibyte_ character despite use of the C locale.
Unfortunately it is easy to make typos or forget entirely to include
these catch-all token types when adding support for new languages (see
v1.7.3.5~16, userdiff: fix typo in ruby and python word regexes,
2010-12-18). Avoid this by including them automatically within the
PATTERNS and IPATTERN macros.
While at it, change the UTF-8 sequence token type to match exactly one
non-ASCII multi-byte character, rather than an arbitrary run of them.
Suggested-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The builtin word regexes should be tested with some simple examples
against simple issues. Do this in bulk.
Mainly due to a lack of language knowledge and inspiration, most of
the test cases (cpp, csharp, java, objc, pascal, php, python, ruby)
are directly based off a C operator precedence table to verify that
all operators are split correctly. This means that they are probably
incomplete or inaccurate except for 'cpp' itself.
Still, they are good enough to already have uncovered a typo in the
python and ruby patterns.
'fortran' is based on my anecdotal knowledge of the DO10I parsing
rules, and thus probably useless. The rest (bibtex, html, tex) are an
ad-hoc test of what I consider important splits in those languages.
Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
When a frontend uses a marks file to ensure its state persists between
runs, it may represent "clean slate" when bootstrapping with "no marks
yet". In such a case, feeding the last state with --import-marks and
saving the state after the current run with --export-marks would be a
natural thing to do.
The --import-marks option however errors out when the specified marks file
doesn't exist; this makes bootstrapping a bit difficult. The location of
the marks file becomes backend-dependent when --relative-marks is in
effect, and the frontend cannot check for the existence of the file in
such a case.
The --import-marks-if-exists option does the same thing as --import-marks
but does not flag an error if the named file does not exist yet to help
these frontends.
Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
As long as sizeof(struct ll_merge_options) is small, there is not
much reason not to keep a copy of the default merge options in the BSS
section. In return, we get clearer code and one less stack frame in
the opts == NULL case.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* rj/test-fixes:
t4135-*.sh: Skip the "backslash" tests on cygwin
t3032-*.sh: Do not strip CR from line-endings while grepping on MinGW
t3032-*.sh: Pass the -b (--binary) option to sed on cygwin
t6038-*.sh: Pass the -b (--binary) option to sed on cygwin
t0000 contains two snippets of actual test output. This causes
problems when passing -v to the test[*]: the test infrastructure
echoes the tests before running them, and the TAP parser then sees
this test output and concludes that two tests failed and that the TAP
output was badly formatted.
Guard against this by quoting the output in the source.
[*] either by running 'make smoke' with GIT_TEST_OPTS=-v, or with
prove ./t0000-basic.sh :: -v
Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
unpack-trees: handle lstat failure for existing file
When check_leading_path notices a file in the way of a new entry to be
checked out, verify_absent uses (1) the mode to determine whether it
is a directory (2) the rest of the stat information to check if this
is actually an old entry, disguised by a change in filename (e.g.,
README -> Readme) that is significant to git but insignificant to the
underlying filesystem. If lstat fails, these checks are performed
with an uninitialied stat structure, producing essentially random
results.
Better to just error out when lstat fails.
The easiest way to reproduce this is to remove a file after the
check_leading_path call and before the lstat in verify_absent. An
lstat failure other than ENOENT in check_leading_path would also
trigger the same code path.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
unpack-trees: handle lstat failure for existing directory
When check_leading_path notices no file in the way of the new entry to
be checked out, verify_absent checks whether there is a directory
there or nothing at all. If that lstat call fails (for example due to
ENOMEM), it assumes ENOENT, meaning a directory with untracked files
would be clobbered in that case.
Check errno after calling lstat, and for conditions other than ENOENT,
just error out.
This is a theoretical race condition. lstat has to succeed moments
before it fails for there to be trouble.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
commit: suggest --amend --reset-author to fix commiter identity
Since the message advises to fix the configuration first, the
advantage of using this command is that it is cut-and-paste ready,
while using --author='...' requires the user to type his name and
email again.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
t9157-*.sh: Make the svn version check more precise
These tests require an svn version 1.5 or newer to run correctly.
In particular, all 1.4.x versions and earlier are too old, so fix
up the case label regex to cover this range exactly.
[Fix provided by Anders Kaseorg <andersk@MIT.EDU>]
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
On Windows, bash stores absolute path names in shell variables in POSIX
format that begins with a slash, rather than in drive-letter format; such
a value is converted to the latter format when it is passed to a non-MSYS
program such as git.
When an expected test value is constructed, it must contain the value that
will be produced by git, which will be in the drive-letter format. But
TRASH_DIRECTORY is in POSIX format. Fix this by using $(pwd), which
produces drive-letter format since 4114156a (Tests on Windows: $(pwd) must
return Windows-style paths).
The change in t1510 is a straight seach-and-replace, except for the first
hunk of the diff.
Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This was added long ago as part of the userdiff refactoring
for textconv, as internally it made the code simpler and
cleaner. However, there was never a concrete use case for
actually using the config variable.
Now that Matthieu Moy has provided such a use case, it's
easy to explain it using his example.
Signed-off-by: Jeff King <peff@peff.net> Acked-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
If svn is built against one version of SQLite and run against another,
libsvn_subr needlessly errors out in operations that need to make a
commit.
That is clearly not a bug in git but let us consider the ramifications for
the test suite. git-svn uses libsvn directly and is probably broken by
that bug; it is right for git-svn tests to fail. The vcs-svn lib, on the
other hand, does not use libsvn and the test t9010 only uses svn to check
its work. This points to two possible improvements:
- do not disable most vcs-svn tests if svn is missing.
- skip validation rather than failing it when svn fails.
Bring about both by putting the svn invocations into a single test that
builds a repo to compare the test-svn-fe result against. The test will
always pass but only will set the new SVNREPO test prereq if svn succeeds;
and validation using that repo gets an SVNREPO prerequisite so it only
runs with working svn installations.
Works-around: http://bugs.debian.org/608925 Noticed-by: A Large Angry SCM <gitzilla@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>