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Normally we try to avoid bumps of the whole-repository
core.repositoryformatversion field. However, it is
unavoidable if we want to safely change certain aspects of
git in a backwards-incompatible way (e.g., modifying the set
of ref tips that we must traverse to generate a list of
unreachable, safe-to-prune objects).
If we were to bump the repository version for every such
change, then any implementation understanding version `X`
would also have to understand `X-1`, `X-2`, and so forth,
even though the incompatibilities may be in orthogonal parts
of the system, and there is otherwise no reason we cannot
implement one without the other (or more importantly, that
the user cannot choose to use one feature without the other,
weighing the tradeoff in compatibility only for that
particular feature).
This patch documents the existing repositoryformatversion
strategy and introduces a new format, "1", which lets a
repository specify that it must run with an arbitrary set of
extensions. This can be used, for example:
- to inform git that the objects should not be pruned based
only on the reachability of the ref tips (e.g, because it
has "clone --shared" children)
- that the refs are stored in a format besides the usual
"refs" and "packed-refs" directories
Because we bump to format "1", and because format "1"
requires that a running git knows about any extensions
mentioned, we know that older versions of the code will not
do something dangerous when confronted with these new
formats.
For example, if the user chooses to use database storage for
refs, they may set the "extensions.refbackend" config to
"db". Older versions of git will not understand format "1"
and bail. Versions of git which understand "1" but do not
know about "refbackend", or which know about "refbackend"
but not about the "db" backend, will refuse to run. This is
annoying, of course, but much better than the alternative of
claiming that there are no refs in the repository, or
writing to a location that other implementations will not
read.
Note that we are only defining the rules for format 1 here.
We do not ever write format 1 ourselves; it is a tool that
is meant to be used by users and future extensions to
provide safety with older implementations.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A hotfix for the topic already in 'master'.
* jk/stash-require-clean-index:
Revert "stash: require a clean index to apply"
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This reverts commit ed178ef13a26136d86ff4e33bb7b1afb5033f908.
That commit was an attempt to improve the safety of applying
a stash, because the application process may create
conflicted index entries, after which it is hard to restore
the original index state.
Unfortunately, this hurts some common workflows around "git
stash -k", like:
git add -p ;# (1) stage set of proposed changes
git stash -k ;# (2) get rid of everything else
make test ;# (3) make sure proposal is reasonable
git stash apply ;# (4) restore original working tree
If you "git commit" between steps (3) and (4), then this
just works. However, if these steps are part of a pre-commit
hook, you don't have that opportunity (you have to restore
the original state regardless of whether the tests passed or
failed).
It's possible that we could provide better tools for this
sort of workflow. In particular, even before ed178ef, it
could fail with a conflict if there were conflicting hunks
in the working tree and index (since the "stash -k" puts the
index version into the working tree, and we then attempt to
apply the differences between HEAD and the old working tree
on top of that). But the fact remains that people have been
using it happily for a while, and the safety provided by
ed178ef is simply not that great. Let's revert it for now.
In the long run, people can work on improving stash for this
sort of workflow, but the safety tradeoff is not worth it in
the meantime.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Recent Mac OS X updates breaks the logic to detect that the machine
is on the AC power in the sample pre-auto-gc script.
* pa/auto-gc-mac-osx:
hooks/pre-auto-gc: adjust power checking for newer OS X
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The output of "pmset -g batt" changed at some point from "Currently
drawing from 'AC Power'" to the slightly different "Now drawing from
'AC Power'". Starting the match from "drawing" makes the check work
in both old and new versions of OS X.
Signed-off-by: Panagiotis Astithas <pastith@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* pt/t0302-needs-sanity:
t0302: "unreadable" test needs SANITY prereq
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The test expects that "chmod -r ~/.git-credentials" would make it
unreadable to the user, and thus needs the SANITY prerequisite.
Reported-by: Jean-Yves LENHOF <jean-yves@lenhof.eu.org>
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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More Perforce row number limit workaround for "git p4".
* ld/p4-changes-block-size:
git-p4: fixing --changes-block-size handling
git-p4: add tests for non-numeric revision range
git-p4: test with limited p4 server results
git-p4: additional testing of --changes-block-size
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The --changes-block-size handling was intended to help when
a user has a limited "maxscanrows" (see "p4 group"). It used
"p4 changes -m $maxchanges" to limit the number of results.
Unfortunately, it turns out that the "maxscanrows" and "maxresults"
limits are actually applied *before* the "-m maxchanges" parameter
is considered (experimentally).
Fix the block-size handling so that it gets blocks of changes
limited by revision number ($Start..$Start+$N, etc). This limits
the number of results early enough that both sets of tests pass.
Note that many other Perforce operations can fail for the same
reason (p4 print, p4 files, etc) and it's probably not possible
to workaround this. In the real world, this is probably not
usually a problem.
Signed-off-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Test that git-p4 can handle a sync with a non-numeric revision
range (e.g. a date).
Signed-off-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Change the --changes-block-size git-p4 test to use an account with
limited "maxresults" and "maxscanrows" values.
These conditions are applied in the server *before* the "-m maxchanges"
parameter to "p4 changes" is applied, and so the strategy that git-p4
uses for limiting the number of changes does not work. As a result,
the tests all fail.
Note that "maxscanrows" is set quite high, as it appears to not only
limit results from "p4 changes", but *also* limits results from
"p4 print". Files that have more than "maxscanrows" changes seem
(experimentally) to be impossible to print. There's no good way to
work around this.
Signed-off-by: Luke Diamand <luke@diamand.org>
Acked-by: Lex Spoon <lex@lexspoon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add additional tests of some corner-cases of the
--changes-block-size git-p4 parameter.
Also reduce the number of p4 changes created during the
tests, so that they complete faster.
Signed-off-by: Luke Diamand <luke@diamand.org>
Acked-by: Lex Spoon <lex@lexspoon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Docfix.
* fk/doc-format-patch-vn:
doc: format-patch: fix typo
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reroll count documentation states that v<n> will be pretended to the
filename. Judging by the examples that should have been 'prepended'.
Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git commit --cleanup=scissors" was not careful enough to protect
against getting fooled by a line that looked like scissors.
* sg/commit-cleanup-scissors:
commit: cope with scissors lines in commit message
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The diff and submodule shortlog appended to the commit message template
by 'git commit --verbose' are not stripped when the commit message
contains an indented scissors line.
When cleaning up a commit message with 'git commit --verbose' or
'--cleanup=scissors' the code is careful and triggers only on a pure
scissors line, i.e. a line containing nothing but a comment character, a
space, and the scissors cut. This is good, because people can embed
scissors lines in the commit message while using 'git commit --verbose',
and the text they write after their indented scissors line doesn't get
deleted.
While doing so, however, the cleanup function only looks at the first
line matching the scissors pattern and if it doesn't start at the
beginning of the line, then the function just returns without performing
any cleanup. This is wrong, because a "real" scissors line added by
'git commit --verbose' might follow, and in that case the diff and
submodule shortlog get included in the commit message.
Fix this by changing the scissors pattern to match only at the beginning
of the line, yet be careful to catch scissors on the first line as well.
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Disable "have we lost a race with competing repack?" check while
receiving a huge object transfer that runs index-pack.
* jk/index-pack-reduce-recheck:
index-pack: avoid excessive re-reading of pack directory
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Since 45e8a74 (has_sha1_file: re-check pack directory before
giving up, 2013-08-30), we spend extra effort for
has_sha1_file to give the right answer when somebody else is
repacking. Usually this effort does not matter, because
after finding that the object does not exist, the next step
is usually to die().
However, some code paths make a large number of
has_sha1_file checks which are _not_ expected to return 1.
The collision test in index-pack.c is such a case. On a
local system, this can cause a performance slowdown of
around 5%. But on a system with high-latency system calls
(like NFS), it can be much worse.
This patch introduces a "quick" flag to has_sha1_file which
callers can use when they would prefer high performance at
the cost of false negatives during repacks. There may be
other code paths that can use this, but the index-pack one
is the most obviously critical, so we'll start with
switching that one.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The tcsh completion writes a bash scriptlet but that would have
failed for users with noclobber set.
* af/tcsh-completion-noclobber:
git-completion.tcsh: fix redirect with noclobber
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tcsh users who happen to have 'set noclobber' elsewhere in their
~/.tcshrc or ~/.cshrc startup files get a 'File exist' error, and
the tcsh completion file doesn't get generated/updated.
Adding a `!` in the redirect works correctly for both clobber (default)
and 'set noclobber' users.
Reviewed-by: Christian Couder <christian.couder@gmail.com>
Signed-off-by: Ariel Faigon <github.2009@yendor.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git for-each-ref" reported "missing object" for 0{40} when it
encounters a broken ref. The lack of object whose name is 0{40} is
not the problem; the ref being broken is.
* mh/reporting-broken-refs-from-for-each-ref:
read_loose_refs(): treat NULL_SHA1 loose references as broken
read_loose_refs(): simplify function logic
for-each-ref: report broken references correctly
t6301: new tests of for-each-ref error handling
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NULL_SHA1 is used to indicate an "invalid object name" throughout our
code (and the code of other git implementations), so it is vastly more
likely that an on-disk reference was set to this value due to a
software bug than that NULL_SHA1 is the legitimate SHA-1 of an actual
object. Therefore, if a loose reference has the value NULL_SHA1,
consider it to be broken.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Make it clearer that there are two possible ways to read the
reference, but that we handle read errors uniformly regardless of
which way it was read.
This refactoring also makes the following change easier to implement.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If there is a loose reference file with invalid contents, "git
for-each-ref" incorrectly reports the problem as being a missing
object with name NULL_SHA1:
$ echo '12345678' >.git/refs/heads/nonsense
$ git for-each-ref
fatal: missing object 0000000000000000000000000000000000000000 for refs/heads/nonsense
With an explicit "--format" string, it can even report that the
reference validly points at NULL_SHA1:
$ git for-each-ref --format='%(objectname) %(refname)'
0000000000000000000000000000000000000000 refs/heads/nonsense
$ echo $?
0
This has been broken since
b7dd2d2 for-each-ref: Do not lookup objects when they will not be used (2009-05-27)
, which changed for-each-ref from using for_each_ref() to using
git_for_each_rawref() in order to avoid looking up the referred-to
objects unnecessarily. (When "git for-each-ref" is given a "--format"
string that doesn't include information about the pointed-to object,
it does not look up the object at all, which makes it considerably
faster. Iterating with DO_FOR_EACH_INCLUDE_BROKEN is essential to this
optimization because otherwise for_each_ref() would itself need to
check whether the object exists as part of its brokenness test.)
But for_each_rawref() includes broken references in the iteration, and
"git for-each-ref" doesn't itself reject references with REF_ISBROKEN.
The result is that broken references are processed *as if* they had
the value NULL_SHA1, which is the value stored in entries for broken
references.
Change "git for-each-ref" to emit warnings for references that are
REF_ISBROKEN but to otherwise skip them.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add tests that for-each-ref correctly reports broken loose reference
files and references that point at missing objects. In fact, two of
these tests fail, because (1) NULL_SHA1 is not recognized as an
invalid reference value, and (2) for-each-ref doesn't respect
REF_ISBROKEN. Fixes to come.
Note that when for-each-ref is run with a --format option that doesn't
require the object to be looked up, then we should still notice if a
loose reference file is corrupt or contains NULL_SHA1, but we don't
notice if it points at a missing object because we don't do an object
lookup. This is OK.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* sg/completion-commit-cleanup:
completion: teach 'scissors' mode to 'git commit --cleanup='
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Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Various fixes around "git am" that applies a patch to a history
that is not there yet.
* pt/am-abort-fix:
am --abort: keep unrelated commits on unborn branch
am --abort: support aborting to unborn branch
am --abort: revert changes introduced by failed 3way merge
am --skip: support skipping while on unborn branch
am -3: support 3way merge on unborn branch
am --skip: revert changes introduced by failed 3way merge
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Since 7b3b7e3 (am --abort: keep unrelated commits since the last failure
and warn, 2010-12-21), git-am would refuse to rewind HEAD if commits
were made since the last git-am failure. This check was implemented in
safe_to_abort(), which checked to see if HEAD's hash matched the
abort-safety file.
However, this check was skipped if the abort-safety file was empty,
which can happen if git-am failed while on an unborn branch. As such, if
any commits were made since then, they would be discarded. Fix this by
carrying on the abort safety check even if the abort-safety file is
empty.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When git-am is first run on an unborn branch, no ORIG_HEAD is created.
As such, any applied commits will remain even after a git am --abort.
To be consistent with the behavior of git am --abort when it is not run
from an unborn branch, we empty the index, and then destroy the branch
pointed to by HEAD if there is no ORIG_HEAD.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Even when a merge conflict occurs with am --3way, the index will be
modified with the results of any successfully merged files. These
changes to the index will not be reverted with a
"git read-tree --reset -u HEAD ORIG_HEAD", as git read-tree will not be
aware of how the current index differs from HEAD or ORIG_HEAD.
To fix this, we first reset any conflicting entries in the index. The
resulting index will contain the results of successfully merged files
introduced by the failed merge. We write this index to a tree, and then
use git read-tree to fast-forward this "index tree" back to ORIG_HEAD,
thus undoing all the changes from the failed merge.
When we are on an unborn branch, HEAD and ORIG_HEAD will not point to
valid trees. In this case, use an empty tree.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When git am --skip is run, git am will copy HEAD's tree entries to the
index with "git reset HEAD". However, on an unborn branch, HEAD does not
point to a tree, so "git reset HEAD" will fail.
Fix this by treating HEAD as en empty tree when we are on an unborn
branch.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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While on an unborn branch, git am -3 will fail to do a threeway merge as
it references HEAD as "our tree", but HEAD does not point to a valid
tree.
Fix this by using an empty tree as "our tree" when we are on an unborn
branch.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Even when a merge conflict occurs with am --3way, the index will be
modified with the results of any succesfully merged files (such as a new
file). These changes to the index will not be reverted with a
"git read-tree --reset -u HEAD HEAD", as git read-tree will not be aware
of how the current index differs from HEAD.
To fix this, we first reset any conflicting entries from the index. The
resulting index will contain the results of successfully merged files.
We write the index to a tree, then use git read-tree -m to fast-forward
the "index tree" back to HEAD, thus undoing all the changes from the
failed merge.
Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Hotfix for the 'untracked-cache' topic that is already in 'master'.
* nd/untracked-cache:
read-cache: fix untracked cache invalidation when split-index is used
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Before this change, t7063.17 fails. The actual action though happens at
t7063.16 where the entry "two" is added back to index after being
removed in the .13. Here we expect a directory invalidate at .16 and
none at .17 where untracked cache is refreshed. But things do not go as
expected when GIT_TEST_SPLIT_INDEX is set.
The different behavior that happens at .16 when split index is used: the
entry "two", when deleted at .13, is simply marked "deleted". When .16
executes, the entry resurfaces from the version in base index. This
happens in merge_base_index() where add_index_entry() is called to add
"two" back from the base index.
This is where the bug comes from. The add_index_entry() is called with
ADD_CACHE_KEEP_CACHE_TREE flag because this version of "two" is not new,
it does not break either cache-tree or untracked cache. The code should
check this flag and not invalidate untracked cache. This causes a second
invalidation violates test expectation. The fix is obvious.
Noticed-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git fsck" used to ignore missing or invalid objects recorded in reflog.
* mh/fsck-reflog-entries:
fsck: report errors if reflog entries point at invalid objects
fsck_handle_reflog_sha1(): new function
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Previously, if a reflog entry's old or new SHA-1 was not resolvable to
an object, that SHA-1 was silently ignored. Instead, report such cases
as errors.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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New function, extracted from fsck_handle_reflog_ent(). The extra
is_null_sha1() test for the new reference is currently unnecessary, as
reflogs are deleted when the reference itself is deleted. But it
doesn't hurt, either.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Portability fix.
* js/sleep-without-select:
lockfile: wait using sleep_millisec() instead of select()
lockfile: convert retry timeout computations to millisecond
help.c: wrap wait-only poll() invocation in sleep_millisec()
lockfile: replace random() by rand()
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Use the new function sleep_millisec() to delay execution for a short
time. This avoids the invocation of select() with just a timeout, but
no file descriptors. Such a use of select() is quit with EINVAL on
Windows, leading to no delay at all.
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When the goal is to wait for some random amount of time up to one
second, it is not necessary to compute with microsecond precision.
This is a preparation to re-use sleep_millisec().
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We want to use the new function elsewhere in a moment.
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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On Windows, we do not have functions srandom() and random(). Use srand()
and rand(). These functions produce random numbers of lesser quality,
but for the purpose (a retry time-out) they are still good enough.
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A compilation workaround.
* es/utf8-stupid-compiler-workaround:
utf8: NO_ICONV: silence uninitialized variable warning
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The last argument of reencode_string_len() is an 'int *' which is
assigned the length of the converted string. When NO_ICONV is defined,
however, reencode_string_len() is stubbed out by the macro:
#define reencode_string_len(a,b,c,d,e) NULL
which never assigns a value to the final argument. When called like
this:
int n;
char *s = reencode_string_len(..., &n);
if (s)
do_something(s, n);
some compilers complain that 'n' is used uninitialized within the
conditional.
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git am" learned am.threeWay configuration variable.
* rl/am-3way-config:
git-am: add am.threeWay config variable
t4150-am: refactor am -3 tests
git-am.sh: fix initialization of the threeway variable
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Add the am.threeWay configuration variable to use the -3 or --3way
option of git am by default. When am.threeway is set and not desired
for a specific git am command, the --no-3way option can be used to
override it.
Signed-off-by: Remi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Create a setup for git am -3 in a separate test instead of creating
this setup each time.
This prepares for the next commit which will use this setup as well.
Signed-off-by: Remi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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