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Prepare to reuse this code in transport.c for "git fetch".
While we're here, internationalize the existing error message.
Signed-off-by: Matt McCutchen <matt@mattmccutchen.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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Code clean-up.
* ws/request-pull-code-cleanup:
request-pull: drop old USAGE stuff
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request-pull uses OPTIONS_SPEC, so no need for (meanwhile incomplete)
USAGE and LONG_USAGE anymore.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Typing ^C to pager, which usually does not kill it, killed Git and
took the pager down as a collateral damage in certain process-tree
structure. This has been fixed.
* jk/execv-dashed-external:
execv_dashed_external: wait for child on signal death
execv_dashed_external: stop exiting with negative code
execv_dashed_external: use child_process struct
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When you hit ^C to interrupt a git command going to a pager,
this usually leaves the pager running. But when a dashed
external is in use, the pager ends up in a funny state and
quits (but only after eating one more character from the
terminal!). This fixes it.
Explaining the reason will require a little background.
When git runs a pager, it's important for the git process to
hang around and wait for the pager to finish, even though it
has no more data to feed it. This is because git spawns the
pager as a child, and thus the git process is the session
leader on the terminal. After it dies, the pager will finish
its current read from the terminal (eating the one
character), and then get EIO trying to read again.
When you hit ^C, that sends SIGINT to git and to the pager,
and it's a similar situation. The pager ignores it, but the
git process needs to hang around until the pager is done. We
addressed that long ago in a3da882120 (pager: do
wait_for_pager on signal death, 2009-01-22).
But when you have a dashed external (or an alias pointing to
a builtin, which will re-exec git for the builtin), there's
an extra process in the mix. For instance, running:
$ git -c alias.l=log l
will end up with a process tree like:
git (parent)
\
git-log (child)
\
less (pager)
If you hit ^C, SIGINT goes to all of them. The pager ignores
it, and the child git process will end up in wait_for_pager().
But the parent git process will die, and the usual EIO
trouble happens.
So we really want the parent git process to wait_for_pager(),
but of course it doesn't know anything about the pager at
all, since it was started by the child. However, we can
have it wait on the git-log child, which in turn is waiting
on the pager. And that's what this patch does.
There are a few design decisions here worth explaining:
1. The new feature is attached to run-command's
clean_on_exit feature. Partly this is convenience,
since that feature already has a signal handler that
deals with child cleanup.
But it's also a meaningful connection. The main reason
that dashed externals use clean_on_exit is to bind the
two processes together. If somebody kills the parent
with a signal, we propagate that to the child (in this
instance with SIGINT, we do propagate but it doesn't
matter because the original signal went to the whole
process group). Likewise, we do not want the parent
to go away until the child has done so.
In a traditional Unix world, we'd probably accomplish
this binding by just having the parent execve() the
child directly. But since that doesn't work on Windows,
everything goes through run_command's more spawn-like
interface.
2. We do _not_ automatically waitpid() on any
clean_on_exit children. For dashed externals this makes
sense; we know that the parent is doing nothing but
waiting for the child to exit anyway. But with other
children, it's possible that the child, after getting
the signal, could be waiting on the parent to do
something (like closing a descriptor). If we were to
wait on such a child, we'd end up in a deadlock. So
this errs on the side of caution, and lets callers
enable the feature explicitly.
3. When we send children the cleanup signal, we send all
the signals first, before waiting on any children. This
is to avoid the case where one child might be waiting
on another one to exit, causing a deadlock. We inform
all of them that it's time to die before reaping any.
In practice, there is only ever one dashed external run
from a given process, so this doesn't matter much now.
But it future-proofs us if other callers start using
the wait_after_clean mechanism.
There's no automated test here, because it would end up racy
and unportable. But it's easy to reproduce the situation by
running the log command given above and hitting ^C.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we try to exec a git sub-command, we pass along the
status code from run_command(). But that may return -1 if we
ran into an error with pipe() or execve(). This tends to
work (and end up as 255 due to twos-complement wraparound
and truncation), but in general it's probably a good idea to
avoid negative exit codes for portability.
We can easily translate to the normal generic "128" code we
get when syscalls cause us to die.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we run a dashed external, we use the one-liner
run_command_v_opt() to do so. Let's switch to using a
child_process struct, which has two advantages:
1. We can drop all of the allocation and cleanup code for
building our custom argv array, and just rely on the
builtin argv_array (at the minor cost of doing a few
extra mallocs).
2. We have access to the complete range of child_process
options, not just the ones that the "_opt()" form can
forward.
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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Documentation and in-code comments updates.
* sb/in-core-index-doc:
documentation: retire unfinished documentation
cache.h: document add_[file_]to_index
cache.h: document remove_index_entry_at
cache.h: document index_name_pos
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When looking for documentation for a specific function, you may be tempted
to run
git -C Documentation grep index_name_pos
only to find the file technical/api-in-core-index.txt, which doesn't
help for understanding the given function. It would be better to not find
these functions in the documentation, such that people directly dive into
the code instead.
In the previous patches we have documented
* index_name_pos()
* remove_index_entry_at()
* add_[file_]to_index()
in cache.h
We already have documentation for:
* add_index_entry()
* read_index()
Which leaves us with a TODO for:
* cache -> the_index macros
* refresh_index()
* discard_index()
* ie_match_stat() and ie_modified(); how they are different and when to
use which.
* write_index() that was renamed to write_locked_index
* cache_tree_invalidate_path()
* cache_tree_update()
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Do this by moving the existing documentation from
read-cache.c to cache.h.
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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An update to a topic that is already in 'master'.
* js/mingw-isatty:
mingw: follow-up to "replace isatty() hack"
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The version of the "replace isatty() hack" that got merged a few
weeks ago did not actually reflect the latest iteration of the patch
series: v3 was sent out with these changes, as requested by the
reviewer Johannes Sixt:
- reworded the comment about "recycling handles"
- moved the reassignment of the `console` variable before the dup2()
call so that it is valid at all times
- removed the "handle = INVALID_HANDLE_VALUE" assignment, as the local
variable `handle` is not used afterwards anyway
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Developer doc update.
* jk/coding-guidelines-update:
CodingGuidelines: clarify multi-line brace style
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There are some "gray areas" around when to omit braces from
a conditional or loop body. Since that seems to have
resulted in some arguments, let's be a little more clear
about our preferred style.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code cleanup.
* js/exec-path-coverity-workaround:
git_exec_path: do not return the result of getenv()
git_exec_path: avoid Coverity warning about unfree()d result
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The result of getenv() is not guaranteed by POSIX to last
beyond another call to getenv(), or setenv(), etc. We
should duplicate the string before returning to the caller
to avoid any surprises.
We already keep a cached pointer to avoid repeatedly leaking
the result of system_path(). We can use the same pointer
here to avoid allocating and leaking for each call.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Technically, it is correct that git_exec_path() returns a possibly
malloc()ed string returned from system_path(), and it is sometimes
not allocated. Cache the result in a static variable and make sure
that we call system_path() only once, which plugs a potential leak.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Documentation fix.
* ad/bisect-terms:
Documentation/bisect: improve on (bad|new) and (good|bad)
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The following part of the description:
git bisect (bad|new) [<rev>]
git bisect (good|old) [<rev>...]
may be a bit confusing, as a reader may wonder if instead it should be:
git bisect (bad|good) [<rev>]
git bisect (old|new) [<rev>...]
Of course the difference between "[<rev>]" and "[<rev>...]" should hint
that there is a good reason for the way it is.
But we can further clarify and complete the description by adding
"<term-new>" and "<term-old>" to the "bad|new" and "good|old"
alternatives.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Tighten a test to avoid mistaking an extended ERE regexp engine as
a PRE regexp engine.
* jk/grep-e-could-be-extended-beyond-posix:
t7810: avoid assumption about invalid regex syntax
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A few of the tests want to check that "git grep -P -E" will
override -P with -E, and vice versa. To do so, we use a
regex with "\x{..}", which is valid in PCRE but not defined
by POSIX (for basic or extended regular expressions).
However, POSIX declares quite a lot of syntax, including
"\x", as "undefined". That leaves implementations free to
extend the standard if they choose. At least one, musl libc,
implements "\x" in the same way as PCRE. Our tests check
that "-E" complains about "\x", which fails with musl.
We can fix this by finding some construct which behaves
reliably on both PCRE and POSIX, but differently in each
system.
One such construct is the use of backslash inside brackets.
In PCRE, "[\d]" interprets "\d" as it would outside the
brackets, matching a digit. Whereas in POSIX, the backslash
must be treated literally, and we match either it or a
literal "d". Moreover, implementations are not free to
change this according to POSIX, so we should be able to rely
on it.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git <cmd> @{push}" on a detached HEAD used to segfault; it has
been corrected to error out with a message.
* km/branch-get-push-while-detached:
branch_get_push: do not segfault when HEAD is detached
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Move the detached HEAD check from branch_get_push_1() to
branch_get_push() to avoid setting branch->push_tracking_ref when
branch is NULL.
Signed-off-by: Kyle Meyer <kyle@kyleam.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git rebase -i" with a recent update started showing an incorrect
count when squashing more than 10 commits.
* jk/rebase-i-squash-count-fix:
rebase--interactive: count squash commits above 10 correctly
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We generate the squash commit message incrementally running
a sed script once for each commit. It parses "This is
a combination of <N> commits" from the first line of the
existing message, adds one to <N>, and uses the result as
the number of our current message.
Since f2d17068fd (i18n: rebase-interactive: mark comments of
squash for translation, 2016-06-17), the first line may be
localized, and sed uses a pretty liberal regex, looking for:
/^#.*([0-9][0-9]*)/
The "[0-9][0-9]*" tries to match double digits, but it
doesn't quite work. The first ".*" is greedy, so if you
have:
This is a combination of 10 commits.
it will eat up "This is a combination of 1", leaving "0" to
match the first "[0-9]" digit, and then skipping the
optional match of "[0-9]*".
As a result, the count resets every 10 commits, and a
15-commit squash would end up as:
# This is a combination of 5 commits.
# This is the 1st commit message:
...
# This is the commit message #2:
... and so on ..
# This is the commit message #10:
...
# This is the commit message #1:
...
# This is the commit message #2:
... etc, up to 5 ...
We can fix this by making the ".*" less greedy. Instead of
depending on ".*?" working portably, we can just limit the
match to non-digit characters, which accomplishes the same
thing.
Reported-by: Brandon Tolsch <btolsch@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git blame --porcelain" misidentified the "previous" <commit, path>
pair (aka "source") when contents came from two or more files.
* jk/blame-fixes:
blame: output porcelain "previous" header for each file
blame: handle --no-abbrev
blame: fix alignment with --abbrev=40
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It's possible for content currently found in one file to
have originated in two separate files, each of which may
have been modified in some single older commit. The
--porcelain output generates an incorrect "previous" header
in this case, whereas --line-porcelain gets it right. The
problem is that the porcelain output tries to omit repeated
details of commits, and treats "previous" as a property of
the commit, when it is really a property of the blamed block
of lines.
Let's look at an example. In a case like this, you might see
this output from --line-porcelain:
SOME_SHA1 1 1 1
author ...
committer ...
previous SOME_SHA1^ file_one
filename file_one
...some line content...
SOME_SHA1 2 1 1
author ...
committer ...
previous SOME_SHA1^ file_two
filename file_two
...some different content....
The "filename" fields tell us that the two lines are from
two different files. But notice that the filename also
appears in the "previous" field, which tells us where to
start a re-blame. The second content line never appeared in
file_one at all, so we would obviously need to re-blame from
file_two (or possibly even some other file, if had just been
renamed to file_two in SOME_SHA1).
So far so good. Now here's what --porcelain looks like:
SOME_SHA1 1 1 1
author ...
committer ...
previous SOME_SHA1^ file_one
filename file_one
...some line content...
SOME_SHA1 2 1 1
filename file_two
...some different content....
We've dropped the author and committer fields from the
second line, as they would just be repeats. But we can't
omit "filename", because it depends on the actual block of
blamed lines, not just the commit. This is handled by
emit_porcelain_details(), which will show the filename
either if it is the first mention of the commit _or_ if the
commit has multiple paths in it.
But we don't give "previous" the same handling. It's written
inside emit_one_suspect_detail(), which bails early if we've
already seen that commit. And so the output above is wrong;
a reader would assume that the correct place to re-blame
line two is from file_one, but that's obviously nonsense.
Let's treat "previous" the same as "filename", and show it
fresh whenever we know we are in a confusing case like this.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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You can already ask blame for full sha1s with "-l" or with
"--abbrev=40". But for consistency with other parts of Git,
we should support "--no-abbrev".
Worse, blame already accepts --no-abbrev, but it's totally
broken. When we see --no-abbrev, the abbrev variable is set
to 0, which is then used as a printf precision. For regular
sha1s, that means we print nothing at all (which is very
wrong). For boundary commits we decrement it to "-1", which
printf interprets as "no limit" (which is almost correct,
except it misses the 39-length magic explained in the
previous commit).
Let's detect --no-abbrev and behave as if --abbrev=40 was
given.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The blame command internally adds 1 to any requested sha1
abbreviation length, and then subtracts it when outputting a
boundary commit. This lets regular and boundary sha1s line
up visually, but it misses one corner case.
When the requested length is 40, we bump the value to 41.
But since we only have 40 characters, that's all we can show
(fortunately the truncation is done by a printf precision
field, so it never tries to read past the end of the
buffer). So a normal sha1 shows 40 hex characters, and a
boundary sha1 shows "^" plus 40 hex characters. The result
is misaligned.
The "-l" option to show long sha1s gets around this by
skipping the "abbrev" variable entirely and just always
using GIT_SHA1_HEXSZ. This avoids the "+1" issue, but it
does mean that boundary commits only have 39 characters
printed. This is somewhat odd, but it does look good
visually: the results are aligned and left-justified. The
alternative would be to allocate an extra column that would
contain either an extra space or the "^" boundary marker.
As this is by definition the human-readable view, it's
probably not that big a deal either way (and of course
--porcelain, etc, correctly produce correct 40-hex sha1s).
But for consistency, this patch teaches --abbrev=40 to
produce the same output as "-l" (always left-aligned, with
40-hex for normal sha1s, and "^" plus 39-hex for
boundaries).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git archive" did not read the standard configuration files, and
failed to notice a file that is marked as binary via the userdiff
driver configuration.
* jk/archive-zip-userdiff-config:
archive-zip: load userdiff config
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Since 4aff646d17 (archive-zip: mark text files in archives,
2015-03-05), the zip archiver will look at the userdiff
driver to decide whether a file is text or binary. This
usually doesn't need to look any further than the attributes
themselves (e.g., "-diff", etc). But if the user defines a
custom driver like "diff=foo", we need to look at
"diff.foo.binary" in the config. Prior to this patch, we
didn't actually load it.
Signed-off-by: Jeff King <peff@peff.net>
Acked-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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It is natural that "git gc --auto" may not attempt to pack
everything into a single pack, and there is no point in warning
when the user has configured the system to use the pack bitmap,
leading to disabling further "gc".
* dt/disable-bitmap-in-auto-gc:
repack: die on incremental + write-bitmap-index
auto gc: don't write bitmaps for incremental repacks
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The bitmap index only works for single packs, so requesting an
incremental repack with bitmap indexes makes no sense.
Signed-off-by: David Turner <dturner@twosigma.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When git gc --auto does an incremental repack of loose objects, we do
not expect to be able to write a bitmap; it is very likely that
objects in the new pack will have references to objects outside of the
pack. So we shouldn't try to write a bitmap, because doing so will
likely issue a warning.
This warning was making its way into gc.log. When the gc.log was
present, future auto gc runs would refuse to run.
Patch by Jeff King.
Bug report, test, and commit message by David Turner.
Signed-off-by: David Turner <dturner@twosigma.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Leakage of lockfiles in the config subsystem has been fixed.
* nd/config-misc-fixes:
config.c: handle lock file in error case in git_config_rename_...
config.c: rename label unlock_and_out
config.c: handle error case for fstat() calls
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We could rely on atexit() to clean up everything, but let's be
explicit when we can. And it's good anyway because the function is
called the second time in the same process, we're in trouble.
This function should not affect the successful case because after
commit_lock_file() is called, rollback_lock_file() becomes no-op,
as long as it is initialized.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are two ways to unlock a file: commit, or revert. Rename it to
commit_and_out to avoid confusion.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Recent update to the default abbreviation length that auto-scales
lacked documentation update, which has been corrected.
* jc/abbrev-autoscale-config:
config.abbrev: document the new default that auto-scales
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We somehow forgot to update the "default is 7" in the
documentation. Also give a way to explicitly ask the auto-scaling
by setting config.abbrev to "auto".
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git fast-import" sometimes mishandled while rebalancing notes
tree, which has been fixed.
* mh/fast-import-notes-fix-new:
fast-import: properly fanout notes when tree is imported
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In typical uses of fast-import, trees are inherited from a parent
commit. In that case, the tree_entry for the branch looks like:
.versions[1].sha1 = $some_sha1
.tree = <tree structure loaded from $some_sha1>
However, when trees are imported, rather than inherited, that is not the
case. One can import a tree with a filemodify command, replacing the
root tree object.
e.g.
"M 040000 $some_sha1 \n"
In this case, the tree_entry for the branch looks like:
.versions[1].sha1 = $some_sha1
.tree = NULL
When adding new notes with the notemodify command, do_change_note_fanout
is called to get a notes count, and to do so, it loops over the
tree_entry->tree, but doesn't do anything when the tree is NULL.
In the latter case above, it means do_change_note_fanout thinks the tree
contains no notes, and new notes are added with no fanout.
Interestingly, do_change_note_fanout does check whether subdirectories
have a NULL .tree, in which case it uses load_tree(). Which means the
right behaviour happens when using the filemodify command to import
subdirectories.
This change makes do_change_note_fanount call load_tree() whenever the
tree_entry it is given has no tree loaded, making all cases handled
equally.
Signed-off-by: Mike Hommey <mh@glandium.org>
Reviewed-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Compression setting for producing packfiles were spread across
three codepaths, one of which did not honor any configuration.
Unify these so that all of them honor core.compression and
pack.compression variables the same way.
* jc/compression-config:
compression: unify pack.compression configuration parsing
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There are three codepaths that use a variable whose name is
pack_compression_level to affect how objects and deltas sent to a
packfile is compressed. Unlike zlib_compression_level that controls
the loose object compression, however, this variable was static to
each of these codepaths. Two of them read the pack.compression
configuration variable, using core.compression as the default, and
one of them also allowed overriding it from the command line.
The other codepath in bulk-checkin did not pay any attention to the
configuration.
Unify the configuration parsing to git_default_config(), where we
implement the parsing of core.loosecompression and core.compression
and make the former override the latter, by moving code to parse
pack.compression and also allow core.compression to give default to
this variable.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Meant eventually for 'maint'.
* ew/svn-fixes:
git-svn: document useLogAuthor and addAuthorFrom config keys
git-svn: allow "0" in SVN path components
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We've always supported these config keys in git-svn,
so document them so users won't have to respecify them
on every invocation.
Reported-by: Juergen Kosel <juergen.kosel@gmx.de>
Signed-off-by: Eric Wong <e@80x24.org>
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