| Commit message (Collapse) | Author | Age | Files | Lines |
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After a client has sent us the complete pack, we may spend
some time processing the data and running hooks. If the
client asked us to be quiet, receive-pack won't send any
progress data during the index-pack or connectivity-check
steps. And hooks may or may not produce their own progress
output. In these cases, the network connection is totally
silent from both ends.
Git itself doesn't care about this (it will wait forever),
but other parts of the system (e.g., firewalls,
load-balancers, etc) might hang up the connection. So we'd
like to send some sort of keepalive to let the network and
the client side know that we're still alive and processing.
We can use the same trick we did in 05e9515 (upload-pack:
send keepalive packets during pack computation, 2013-09-08).
Namely, we will send an empty sideband data packet every `N`
seconds that we do not relay any stderr data over the
sideband channel. As with 05e9515, this means that we won't
bother sending keepalives when there's actual progress data,
but will kick in when it has been disabled (or if there is a
lull in the progress data).
The concept is simple, but the details are subtle enough
that they need discussing here.
Before the client sends us the pack, we don't want to do any
keepalives. We'll have sent our ref advertisement, and we're
waiting for them to send us the pack (and tell us that they
support sidebands at all).
While we're receiving the pack from the client (or waiting
for it to start), there's no need for keepalives; it's up to
them to keep the connection active by sending data.
Moreover, it would be wrong for us to do so. When we are the
server in the smart-http protocol, we must treat our
connection as half-duplex. So any keepalives we send while
receiving the pack would potentially be buffered by the
webserver. Not only does this make them useless (since they
would not be delivered in a timely manner), but it could
actually cause a deadlock if we fill up the buffer with
keepalives. (It wouldn't be wrong to send keepalives in this
phase for a full-duplex connection like ssh; it's simply
pointless, as it is the client's responsibility to speak).
As soon as we've gotten all of the pack data, then the
client is waiting for us to speak, and we should start
keepalives immediately. From here until the end of the
connection, we send one any time we are not otherwise
sending data.
But there's a catch. Receive-pack doesn't know the moment
we've gotten all the data. It passes the descriptor to
index-pack, who reads all of the data, and then starts
resolving the deltas. We have to communicate that back.
To make this work, we instruct the sideband muxer to enable
keepalives in three phases:
1. In the beginning, not at all.
2. While reading from index-pack, wait for a signal
indicating end-of-input, and then start them.
3. Afterwards, always.
The signal from index-pack in phase 2 has to come over the
stderr channel which the muxer is reading. We can't use an
extra pipe because the portable run-command interface only
gives us stderr and stdout.
Stdout is already used to pass the .keep filename back to
receive-pack. We could also send a signal there, but then we
would find out about it in the main thread. And the
keepalive needs to be done by the async muxer thread (since
it's the one writing sideband data back to the client). And
we can't reliably signal the async thread from the main
thread, because the async code sometimes uses threads and
sometimes uses forked processes.
Therefore the signal must come over the stderr channel,
where it may be interspersed with other random
human-readable messages from index-pack. This patch makes
the signal a single NUL byte. This is easy to parse, should
not appear in any normal stderr output, and we don't have to
worry about any timing issues (like seeing half the signal
bytes in one read(), and half in a subsequent one).
This is a bit ugly, but it's simple to code and should work
reliably.
Another option would be to stop using an async thread for
muxing entirely, and just poll() both stderr and stdout of
index-pack from the main thread. This would work for
index-pack (because we aren't doing anything useful in the
main thread while it runs anyway). But it would make the
connectivity check and the hook muxers much more
complicated, as they need to simultaneously feed the
sub-programs while reading their stderr.
The index-pack phase is the only one that needs this
signaling, so it could simply behave differently than the
other two. That would mean having two separate
implementations of copy_to_sideband (and the keepalive
code), though. And it still doesn't get rid of the
signaling; it just means we can write a nicer message like
"END_OF_INPUT" or something on stdout, since we don't have
to worry about separating it from the stderr cruft.
One final note: this signaling trick is only done with
index-pack, not with unpack-objects. There's no point in
doing it for the latter, because by definition it only kicks
in for a small number of objects, where keepalives are not
as useful (and this conveniently lets us avoid duplicating
the implementation).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we receive a large push, the server side of the
connection may spend a lot of time (30s or more for a full
push of linux.git) walking the object graph without
producing any output. Let's give the user some indication
that we're actually working.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If the connectivity check encounters a problem when
receiving a push, the error output goes to receive-pack's
stderr, whose destination depends on the protocol used
(ssh tends to send it to the user, though without a "remote"
prefix; http will generally eat it in the server's error
log).
The information should consistently go back to the user, as
there is a reasonable chance their client is buggy and
generating a bad pack.
We can do so by muxing it over the sideband as we do with
other sub-process stderr.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we receive a large push, the server side may have to
spend a lot of CPU processing the incoming packfile.
During the "receiving" phase, we are typically network
bound, and the client is writing its own progress to the
user. But during the delta resolution phase, we may spend
minutes (e.g., for a full push of linux.git) without
making any indication to the user that the connection has
not hung.
Let's ask index-pack to produce progress output for this
phase (unless the client asked us to be quiet, of course).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The index-pack command has two progress meters: one for
"receiving objects", and one for "resolving deltas". You get
neither by default, or both with "-v".
But for a push through receive-pack, we would want only the
"resolving deltas" phase, _not_ the "receiving objects"
progress. There are two reasons for this.
One is simply that existing clients are already printing
"writing objects" progress at the same time. Arguably
"receiving" from the far end is more useful, because it
tells you what has actually gotten there, as opposed to what
might be stuck in a buffer somewhere between the client and
server. But that would require a protocol extension to tell
clients not to print their progress. Possible, but
complexity for little gain.
The second reason is much more important. In a full-duplex
connection like git-over-ssh, we can print progress while
the pack is incoming, and it will immediately get to the
client. But for a half-duplex connection like git-over-http,
we should not say anything until we have received the full
request. Anything we write is subject to being stuck in a
buffer by the webserver. Worse, we can end up in a deadlock
if that buffer fills up.
So our best bet is to avoid writing anything that isn't a
small fixed size until we've received the full pack.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Because the initial connectivity check for a cloned
repository can be slow, 0781aa4 (clone: let the user know
when check_everything_connected is run, 2013-05-03) added a
"fake" progress meter; we simply say "Checking connectivity"
when it starts, and "done" at the end, with nothing between.
Since check_connected() now knows how to do a real progress
meter, we can drop our fake one and use that one instead.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Connectivity checks have to traverse the entire object graph
in the worst case (e.g., a full clone or a full push). For
large repositories like linux.git, this can take 30-60
seconds, during which time git may produce little or no
output.
Let's add the option of showing progress, which is taken
care of by rev-list.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Unless the "quiet" flag is given, check_connected sends any
errors to the stderr of the caller (because the child
rev-list inherits that descriptor). However, server-side
callers may want to send these over a sideband channel
instead. Let's make that possible.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The number of variants of check_everything_connected has
grown over the years, so that the "real" function takes
several possibly-zero, possibly-NULL arguments. We hid the
complexity behind some wrapper functions, but this doesn't
scale well when we want to add new options.
If we add more wrapper variants to handle the new options,
then we can get a combinatorial explosion when those options
might be used together (right now nobody wants to use both
"shallow" and "transport" together, so we get by with just a
few wrappers).
If instead we add new parameters to each function, each of
which can have a default value, then callers who want the
defaults end up with confusing invocations like:
check_everything_connected(fn, 0, data, -1, 0, NULL);
where it is unclear which parameter is which (and every
caller needs updated when we add new options).
Instead, let's add a struct to hold all of the optional
parameters. This is a little more verbose for the callers
(who have to declare the struct and fill it in), but it
makes their code much easier to follow, because every option
is named as it is set (and unused options do not have to be
mentioned at all).
Note that we could also stick the iteration function and its
callback data into the option struct, too. But since those
are required for each call, by avoiding doing so, we can let
very simple callers just pass "NULL" for the options and not
worry about the struct at all.
While we're touching each site, let's also rename the
function to check_connected(). The existing name was quite
long, and not all of the wrappers even used the full name.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This avoids the magic "9" array-size which we must avoid
overflowing, making further patches simpler.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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It's easy to ask rev-list to do a traversal that may takes
many seconds (e.g., by calling "--objects --all"). In theory
you can monitor its progress by the output you get to
stdout, but this isn't always easy.
Some operations, like "--count", don't make any output until
the end.
And some callers, like check_everything_connected(), are
using it just for the error-checking of the traversal, and
throw away stdout entirely.
This patch adds a "--progress" option which can be used to
give some eye-candy for a user waiting for a long traversal.
This is just a rev-list option and not a regular traversal
option, because it needs cooperation from the callbacks in
builtin/rev-list.c to do the actual count.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The check_everything_connected function takes a "quiet"
parameter which does two things if non-zero:
1. redirect rev-list's stderr to /dev/null to avoid
showing errors to the user
2. pass "--quiet" to rev-list
Item (1) is obviously useful. But item (2) is
surprisingly not. For rev-list, "--quiet" does not have
anything to do with chattiness on stderr; it tells rev-list
not to bother writing the list of traversed objects to
stdout, for efficiency. And since we always redirect
rev-list's stdout to /dev/null in this function, there is no
point in asking it to ever write anything to stdout.
The efficiency gains are modest; a best-of-five run of "git
rev-list --objects --all" on linux.git dropped from 32.013s
to 30.502s when adding "--quiet". That's only about 5%, but
given how easy it is, it's worth doing.
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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"git p4" used a location outside $GIT_DIR/refs/ to place its
temporary branches, which has been moved to refs/git-p4-tmp/.
* ls/p4-tmp-refs:
git-p4: place temporary refs used for branch import under refs/git-p4-tmp
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Git-P4 used to place temporary refs under "git-p4-tmp". Since 3da1f37
Git checks that all refs are placed under "refs". Instruct Git-P4 to
place temporary refs under "refs/git-p4-tmp". There are no backwards
compatibility considerations as these refs are transient.
Use "git show-ref --verify" to check the (non-)existience of the refs
instead of file checks assuming the file-based ref backend.
All refs under "refs" are shared across all worktrees. This is not
desired for temporary Git-P4 refs and will be adressed in a later patch.
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Reviewed-by: Vitor Antunes <vitor.hda@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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One part of "git am" had an oddball helper function that called
stuff from outside "his" as opposed to calling what we have "ours",
which was not gender-neutral and also inconsistent with the rest of
the system where outside stuff is usuall called "theirs" in
contrast to "ours".
* js/am-call-theirs-theirs-in-fallback-3way:
am: counteract gender bias
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Since 47f0b6d5 (Fall back to three-way merge when applying a patch.,
2005-10-06), i.e. for almost 11 years already, we used a male form
to describe "the other tree".
While it was unintended, this gave the erroneous impression as if
the Git developers thought of users as male, and were unaware of the
important role in software development played by female actors such
as Ada Lovelace, Grace Hopper and Margaret Hamilton. In fact, the
first professional software developers were all female.
Let's change those unfortunate references to the gender neutral
"their tree". Doing so also makes the fallback_merge_recursive(),
which is an oddball, more in line with the other parts of the system
where we contrast what we have vs what we obtain from others by
saying "ours" vs "theirs". This inconsistency was also unintended.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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General code clean-up around a helper function to write a
single-liner to a file.
* jk/write-file:
branch: use write_file_buf instead of write_file
use write_file_buf where applicable
write_file: add format attribute
write_file: add pointer+len variant
write_file: use xopen
write_file: drop "gently" form
branch: use non-gentle write_file for branch description
am: ignore return value of write_file()
config: fix bogus fd check when setting up default config
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If we already have a strbuf, then using write_file_buf is a
little nicer to read (no wondering whether "%s" will eat
your NULs), and it's more efficient (no extra formatting
step).
We don't care about the newline magic of write_file(), as we
have our own multi-line content.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are several places where we open a file, write some
content from a strbuf, and close it. These can be simplified
with write_file_buf(). As a bonus, many of these did not
catch write problems at close() time.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This gives us compile-time checking of our format strings,
which is a good thing.
I had also hoped it would help with confusing write_file()
and write_file_buf(), since the former's "..." can make it
match the signature of the latter. But given that the buffer
for write_file_buf() is generally not a string literal, the
compiler won't complain unless -Wformat-nonliteral is on,
and that creates a ton of false positives elsewhere in the
code base.
While we're there, let's also give the function a docstring,
which it never had.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are many callsites which could use write_file, but for
which it is a little awkward because they have a strbuf or
other pointer/len combo. Specifically:
1. write_file() takes a format string, so we have to use
"%s" or "%.*s", which are ugly.
2. Using any form of "%s" does not handle embedded NULs in
the output. That probably doesn't matter for our
call-sites, but it's nicer not to have to worry.
3. It's less efficient; we format into another strbuf
just to do the write. That's probably not measurably
slow for our uses, but it's simply inelegant.
We can fix this by providing a helper to write out the
formatted buffer, and just calling it from write_file().
Note that we don't do the usual "complete with a newline"
that write_file does. If the caller has their own buffer,
there's a reasonable chance they're doing something more
complicated than a single line, and they can call
strbuf_complete_line() themselves.
We could go even further and add strbuf_write_file(), but it
doesn't save much:
- write_file_buf(path, sb.buf, sb.len);
+ strbuf_write_file(&sb, path);
It would also be somewhat asymmetric with strbuf_read_file,
which actually returns errors rather than dying (and the
error handling is most of the benefit of write_file() in the
first place).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This simplifies the code a tiny bit, and provides consistent
error messages with other users of xopen().
While we're here, let's also switch to using O_WRONLY. We
know we're only going to open/write/close the file, so
there's no point in asking for O_RDWR.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are no callers left of write_file_gently(). Let's drop
it, as it doesn't seem likely for new callers to be added
(since its inception, the only callers who wanted the gentle
form generally just died immediately themselves, and have
since been converted).
While we're there, let's also drop the "int" return from
write_file, as it is never meaningful (in the non-gentle
form, we always either die or return 0).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We use write_file_gently() to do this job currently.
However, if we see an error, we simply complain via
error_errno() and then end up exiting with an error code.
By switching to the non-gentle form, the function will die
for us, with a better error. It is more specific about which
syscall caused the error, and that mentions the
actual filename we're trying to write.
Our exit code for the error case does switch from "1" to
"128", but that's OK; it wasn't a meaningful documented code
(and in fact it was odd that it was a different exit code
than most other error conditions).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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write_file() either returns 0 or dies, so there is no point in checking
its return value. The callers of the wrappers write_state_text(),
write_state_count() and write_state_bool() consequently already ignore
their return values. Stop pretending we care and make them void.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Since 9830534 (config --global --edit: create a template
file if needed, 2014-07-25), an edit of the global config
file will try to open() it with O_EXCL, and wants to handle
three cases:
1. We succeeded; the user has no config file, and we
should fill in the default template.
2. We got EEXIST; they have a file already, proceed as usual.
3. We got another error; we should complain.
However, the check for case 1 does "if (fd)", which will
generally _always_ be true (except for the oddball case that
somehow our stdin got closed and opening really did give us
a new descriptor 0).
So in the EEXIST case, we tried to write the default config
anyway! Fortunately, this turns out to be a noop, since we
just end up writing to and closing "-1", which does nothing.
But in case 3, we would fail to notice any other errors, and
just silently continue (given that we don't actually notice
write errors for the template either, it's probably not that
big a deal; we're about to spawn the editor, so it would
notice any problems. But the code is clearly _trying_ to hit
cover this case and failing).
We can fix it easily by using "fd >= 0" for case 1.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code clean-up to avoid using a variable string that compilers may
feel untrustable as printf-style format given to write_file()
helper function.
* jk/printf-format:
commit.c: remove print_commit_list()
avoid using sha1_to_hex output as printf format
walker: let walker_say take arbitrary formats
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The helper function tries to offer a way to conveniently show the
last one differently from others, presumably to allow you to say
something like
A, B, and C.
while iterating over a list that has these three elements.
However, there is only one caller, and it passes the same format
string "%s\n" for both the last one and the other ones. Retire the
helper function and update the caller with a simplified version.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We know that it should not contain any percent-signs, but
it's a good habit not to feed non-literals to printf
formatters.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We take a printf-style format and a single "char *"
parameter, and the format must therefore have at most one
"%s" in it. Besides being error-prone (and tickling
-Wformat-nonliteral), this is unnecessarily restrictive. We
can just provide the usual varargs interface.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The .c/.h sources are marked as such in our .gitattributes file so
that "git diff -W" and friends would work better.
* rs/help-c-source-with-gitattributes:
.gitattributes: set file type for C files
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Set the diff attribute for C source file to "cpp" in order to improve
git's ability to determine hunk headers. In particular it helps avoid
showing unindented labels in hunk headers. That in turn is useful for
git diff -W and git grep -W, which show whole functions now instead of
stopping at a label.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Improve the look of the way "git fetch" reports what happened to
each ref that was fetched.
* nd/fetch-ref-summary:
fetch: reduce duplicate in ref update status lines with placeholder
fetch: align all "remote -> local" output
fetch: change flag code for displaying tag update and deleted ref
fetch: refactor ref update status formatting code
git-fetch.txt: document fetch output
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In the "remote -> local" line, if either ref is a substring of the
other, the common part in the other string is replaced with "*". For
example
abc -> origin/abc
refs/pull/123/head -> pull/123
become
abc -> origin/*
refs/*/head -> pull/123
Activated with fetch.output=compact.
For the record, this output is not perfect. A single giant ref can
push all refs very far to the right and likely be wrapped around. We
may have a few options:
- exclude these long lines smarter
- break the line after "->", exclude it from column width calculation
- implement a new format, { -> origin/}foo, which makes the problem
go away at the cost of a bit harder to read
- reverse all the arrows so we have "* <- looong-ref", again still
hard to read.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We do align "remote -> local" output by allocating 10 columns to
"remote". That produces aligned output only for short refs. An extra
pass is performed to find the longest remote ref name (that does not
produce a line longer than terminal width) to produce better aligned
output.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This makes the fetch flag code consistent with push, where '-' means
deleted ref.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This makes it easier to change the formatting later. And it makes sure
translators cannot mess up format specifiers and break Git.
There are a couple call sites where the length of the second column is
TRANSPORT_SUMMARY_WIDTH instead of calculated by TRANSPORT_SUMMARY(),
which is enforced now. The result should be the same because these call
sites do not contain characters outside ASCII range.
The two strbuf_addf() calls instead of one is mostly to reduce
diff-noise in a future patch where "ref -> ref" is reformatted
differently.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This documents the ref update status of fetch. The structure of this
output is defined in [1]. The ouput content is refined a bit in [2]
[3] [4].
This patch is a copy from git-push.txt, modified a bit because the
flag '-' means different things in push (delete) and fetch (tag
update).
PS. For code archaeologists, the discussion mentioned in [1] is
probably [5].
[1] 165f390 (git-fetch: more terse fetch output - 2007-11-03)
[2] 6315472 (fetch: report local storage errors ... - 2008-06-26)
[3] f360d84 (builtin-fetch: add --prune option - 2009-11-10)
[4] 0997ada (fetch: describe new refs based on where... - 2012-04-16)
[5] http://thread.gmane.org/gmane.comp.version-control.git/61657
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The test framework learned a new helper test_match_signal to
check an exit code from getting killed by an expected signal.
* jk/test-match-signal:
t/lib-git-daemon: use test_match_signal
test_must_fail: use test_match_signal
t0005: use test_match_signal as appropriate
tests: factor portable signal check out of t0005
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When git-daemon exits, we expect it to be with the SIGTERM
we just sent it. If we see anything else, we'll complain.
But our check against exit code "143" is not portable. For
example:
$ ksh93 t5570-git-daemon.sh
[...]
error: git daemon exited with status: 271
We can fix this by using test_match_signal.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In 8bf4bec (add "ok=sigpipe" to test_must_fail and use it to
fix flaky tests, 2015-11-27), test_must_fail learned to
recognize "141" as a sigpipe failure. However, testing for
a signal is more complicated than that; we should use
test_match_signal to implement more portable checking.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The first test already uses this more portable construct
(that was where it was factored from initially), but the
later tests do a raw comparison against 141 to look for
SIGPIPE, which can fail on some shells and platforms.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In POSIX shells, a program which exits due to a signal
generally has an exit code of 128 plus the signal number.
However, ksh uses 256 plus the signal number. We've
accounted for that in t0005, but not in other tests. Let's
pull out the logic so we can use it elsewhere.
It would be nice for debugging if this additionally printed
errors to stderr, like our other test_* helpers. But we're
going to need to use it in other places besides the innards
of a test_expect block. So let's leave it as generic as
possible.
Note that we also leave the magic "3" for Windows out of the
generic helper. This is an artifact of the way we use
raise() to kill ourselves in test-sigchain.c, and will not
necessarily apply to all programs. So it's better to keep it
out of the helper, to reduce the chance of confusing it with
a real call to exit(3).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are certain house-keeping tasks that need to be performed at
the very beginning of any Git program, and programs that are not
built-in commands had to do them exactly the same way as "git"
potty does. It was easy to make mistakes in one-off standalone
programs (like test helpers). A common "main()" function that
calls cmd_main() of individual program has been introduced to
make it harder to make mistakes.
* jk/common-main:
mingw: declare main()'s argv as const
common-main: call git_setup_gettext()
common-main: call restore_sigpipe_to_default()
common-main: call sanitize_stdfds()
common-main: call git_extract_argv0_path()
add an extra level of indirection to main()
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* jk/common-main-2.8:
mingw: declare main()'s argv as const
common-main: call git_setup_gettext()
common-main: call restore_sigpipe_to_default()
common-main: call sanitize_stdfds()
common-main: call git_extract_argv0_path()
add an extra level of indirection to main()
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In 84d32bf (sparse: Fix mingw_main() argument number/type errors,
2013-04-27), we addressed problems identified by the 'sparse' tool where
argv was declared inconsistently. The way we addressed it was by casting
from the non-const version to the const-version.
This patch is long overdue, fixing compat/mingw.h's declaration to
make the "argv" parameter const. This also allows us to lose the
"const" trickery introduced earlier to common-main.c:main().
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This should be part of every program, as otherwise users do
not get translated error messages. However, some external
commands forgot to do so (e.g., git-credential-store). This
fixes them, and eliminates the repeated code in programs
that did remember to use it.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This is another safety/sanity setup that should be in force
everywhere, but which we only applied in git.c. This did
catch most cases, since even external commands are typically
run via "git ..." (and the restoration applies to
sub-processes, too). But there were cases we missed, such as
somebody calling git-upload-pack directly via ssh, or
scripts which use dashed external commands directly.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This is setup that should be done in every program for
safety, but we never got around to adding it everywhere (so
builtins benefited from the call in git.c, but any external
commands did not). Putting it in the common main() gives us
this safety everywhere.
Note that the case in daemon.c is a little funny. We wait
until we know whether we want to daemonize, and then either:
- call daemonize(), which will close stdio and reopen it to
/dev/null under the hood
- sanitize_stdfds(), to fix up any odd cases
But that is way too late; the point of sanitizing is to give
us reliable descriptors on 0/1/2, and we will already have
executed code, possibly called die(), etc. The sanitizing
should be the very first thing that happens.
With this patch, git-daemon will sanitize first, and can
remove the call in the non-daemonize case. It does mean that
daemonize() may just end up closing the descriptors we
opened, but that's not a big deal (it's not wrong to do so,
nor is it really less optimal than the case where our parent
process redirected us from /dev/null ahead of time).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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