| Commit message (Collapse) | Author | Age | Files | Lines |
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A regression fix for 2.11 that made the code to read the list of
alternate object stores overrun the end of the string.
* jk/info-alternates-fix:
read_info_alternates: warn on non-trivial errors
read_info_alternates: read contents into strbuf
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When we fail to open $GIT_DIR/info/alternates, we silently
assume there are no alternates. This is the right thing to
do for ENOENT, but not for other errors.
A hard error is probably overkill here. If we fail to read
an alternates file then either we'll complete our operation
anyway, or we'll fail to find some needed object. Either
way, a warning is good idea. And we already have a helper
function to handle this pattern; let's just call
warn_on_fopen_error().
Note that technically the errno from strbuf_read_file()
might be from a read() error, not open(). But since read()
would never return ENOENT or ENOTDIR, and since it produces
a generic "unable to access" error, it's suitable for
handling errors from either.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jk/info-alternates-fix-2.11:
read_info_alternates: read contents into strbuf
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This patch fixes a regression in v2.11.1 where we might read
past the end of an mmap'd buffer. It was introduced in
cf3c635210.
The link_alt_odb_entries() function has always taken a
ptr/len pair as input. Until cf3c635210 (alternates: accept
double-quoted paths, 2016-12-12), we made a copy of those
bytes in a string. But after that commit, we switched to
parsing the input left-to-right, and we ignore "len"
totally, instead reading until we hit a NUL.
This has mostly gone unnoticed for a few reasons:
1. All but one caller passes a NUL-terminated string, with
"len" pointing to the NUL.
2. The remaining caller, read_info_alternates(), passes in
an mmap'd file. Unless the file is an exact multiple of
the page size, it will generally be followed by NUL
padding to the end of the page, which just works.
The easiest way to demonstrate the problem is to build with:
make SANITIZE=address NO_MMAP=Nope test
Any test which involves $GIT_DIR/info/alternates will fail,
as the mmap emulation (correctly) does not add an extra NUL,
and ASAN complains about reading past the end of the buffer.
One solution would be to teach link_alt_odb_entries() to
respect "len". But it's actually a bit tricky, since we
depend on unquote_c_style() under the hood, and it has no
ptr/len variant.
We could also just make a NUL-terminated copy of the input
bytes and operate on that. But since all but one caller
already is passing a string, instead let's just fix that
caller to provide NUL-terminated input in the first place,
by swapping out mmap for strbuf_read_file().
There's no advantage to using mmap on the alternates file.
It's not expected to be large (and anyway, we're copying its
contents into an in-memory linked list). Nor is using
git_open() buying us anything here, since we don't keep the
descriptor open for a long period of time.
Let's also drop the "len" parameter entirely from
link_alt_odb_entries(), since it's completely ignored. That
will avoid any new callers re-introducing a similar bug.
Reported-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git fetch <there> <src>:<dst>" allows an object name on the <src>
side when the other side accepts such a request since Git v2.5, but
the documentation was left stale.
* jc/fetch-refspec-doc-update:
fetch doc: src side of refspec could be full SHA-1
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Since a9d34933 ("Merge branch 'fm/fetch-raw-sha1'", 2015-06-01) we
allow to fetch by an object name when the other side accepts such a
request, but we never updated the documentation to match.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Many codepaths did not diagnose write failures correctly when disks
go full, due to their misuse of write_in_full() helper function,
which have been corrected.
* jk/write-in-full-fix:
read_pack_header: handle signed/unsigned comparison in read result
config: flip return value of store_write_*()
notes-merge: use ssize_t for write_in_full() return value
pkt-line: check write_in_full() errors against "< 0"
convert less-trivial versions of "write_in_full() != len"
avoid "write_in_full(fd, buf, len) != len" pattern
get-tar-commit-id: check write_in_full() return against 0
config: avoid "write_in_full(fd, buf, len) < len" pattern
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The result of read_in_full() may be -1 if we saw an error.
But in comparing it to a sizeof() result, that "-1" will be
promoted to size_t. In fact, the largest possible size_t
which is much bigger than our struct size. This means that
our "< sizeof(header)" error check won't trigger.
In practice, we'd go on to read uninitialized memory and
compare it to the PACK signature, which is likely to fail.
But we shouldn't get there.
We can fix this by making a direct "!=" comparison to the
requested size, rather than "<". This means that errors get
lumped in with short reads, but that's sufficient for our
purposes here. There's no PH_ERROR tp represent our case.
And anyway, this function reads from pipes and network
sockets. A network error may racily appear as EOF to us
anyway if there's data left in the socket buffers.
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The store_write_section() and store_write_pairs() functions
are basically high-level wrappers around write(). But their
return values are flipped from our usual convention, using
"1" for success and "0" for failure.
Let's flip them to follow the usual write() conventions and
update all callers. As these are local to config.c, it's
unlikely that we'd have new callers in any topics in flight
(which would be silently broken by our change). But just to
be on the safe side, let's rename them to just
write_section() and write_pairs(). That also accentuates
their relationship with write().
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We store the return value of write_in_full() in a long,
though the return is actually an ssize_t. This probably
doesn't matter much in practice (since the buffer size is
alredy an unsigned long), but it might if the size if
between what can be represented in "long" and "unsigned
long", and if your size_t is larger than a "long" (as it is
on 64-bit Windows).
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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As with the previous two commits, we prefer to check
write_in_full()'s return value to see if it is negative,
rather than comparing it to the input length.
These cases actually flip the logic to check for success,
making conversion a little different than in other cases. We
could of course write:
if (write_in_full(...) >= 0)
return 0;
return error(...);
But our usual method of spelling write() error checks is
just "< 0". So let's flip the logic for each of these
conditionals to our usual style.
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The prior commit converted many sites to check the return
value of write_in_full() for negativity, rather than a
mismatch with the input length. This patch covers similar
cases, but where the return value is stored in an
intermediate variable. These should get the same treatment,
but they need to be reviewed more carefully since it would
be a bug if the return value is stored in an unsigned type
(which indeed, it is in one of the cases).
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The return value of write_in_full() is either "-1", or the
requested number of bytes[1]. If we make a partial write
before seeing an error, we still return -1, not a partial
value. This goes back to f6aa66cb95 (write_in_full: really
write in full or return error on disk full., 2007-01-11).
So checking anything except "was the return value negative"
is pointless. And there are a couple of reasons not to do
so:
1. It can do a funny signed/unsigned comparison. If your
"len" is signed (e.g., a size_t) then the compiler will
promote the "-1" to its unsigned variant.
This works out for "!= len" (unless you really were
trying to write the maximum size_t bytes), but is a
bug if you check "< len" (an example of which was fixed
recently in config.c).
We should avoid promoting the mental model that you
need to check the length at all, so that new sites are
not tempted to copy us.
2. Checking for a negative value is shorter to type,
especially when the length is an expression.
3. Linus says so. In d34cf19b89 (Clean up write_in_full()
users, 2007-01-11), right after the write_in_full()
semantics were changed, he wrote:
I really wish every "write_in_full()" user would just
check against "<0" now, but this fixes the nasty and
stupid ones.
Appeals to authority aside, this makes it clear that
writing it this way does not have an intentional
benefit. It's a historical curiosity that we never
bothered to clean up (and which was undoubtedly
cargo-culted into new sites).
So let's convert these obviously-correct cases (this
includes write_str_in_full(), which is just a wrapper for
write_in_full()).
[1] A careful reader may notice there is one way that
write_in_full() can return a different value. If we ask
write() to write N bytes and get a return value that is
_larger_ than N, we could return a larger total. But
besides the fact that this would imply a totally broken
version of write(), it would already invoke undefined
behavior. Our internal remaining counter is an unsigned
size_t, which means that subtracting too many byte will
wrap it around to a very large number. So we'll instantly
begin reading off the end of the buffer, trying to write
gigabytes (or petabytes) of data.
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We ask to write 41 bytes and make sure that the return value
is at least 41. This is the same "dangerous" pattern that
was fixed in the prior commit (wherein a negative return
value is promoted to unsigned), though it is not dangerous
here because our "41" is a constant, not an unsigned
variable.
But we should convert it anyway to avoid modeling a
dangerous construct.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The return type of write_in_full() is a signed ssize_t,
because we may return "-1" on failure (even if we succeeded
in writing some bytes). But "len" itself is may be an
unsigned type (the function takes a size_t, but of course we
may have something else in the calling function). So while
it seems like:
if (write_in_full(fd, buf, len) < len)
die_errno("write error");
would trigger on error, it won't if "len" is unsigned. The
compiler sees a signed/unsigned comparison and promotes the
signed value, resulting in (size_t)-1, the highest possible
size_t (or again, whatever type the caller has). This cannot
possibly be smaller than "len", and so the conditional can
never trigger.
I scoured the code base for cases of this, but it turns out
that these two in git_config_set_multivar_in_file_gently()
are the only ones. Here our "len" is the difference between
two size_t variables, making the result an unsigned size_t.
We can fix this by just checking for a negative return value
directly, as write_in_full() will never return any value
except -1 or the full count.
There's no addition to the test suite here, since you need
to convince write() to fail in order to see the problem. The
simplest reproduction recipe I came up with is to trigger
ENOSPC:
# make a limited-size filesystem
dd if=/dev/zero of=small.disk bs=1M count=1
mke2fs small.disk
mkdir mnt
sudo mount -o loop small.disk mnt
cd mnt
sudo chown $USER:$USER .
# make a config file with some content
git config --file=config one.key value
git config --file=config two.key value
# now fill up the disk
dd if=/dev/zero of=fill
# and try to delete a key, which requires copying the rest
# of the file to config.lock, and will fail on write()
git config --file=config --unset two.key
That final command should (and does after this patch)
produce an error message due to the failed write, and leave
the file intact. Instead, it silently ignores the failure
and renames config.lock into place, leaving you with a
totally empty config file!
Reported-by: demerphq <demerphq@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Many codepaths have been updated to squelch -Wsign-compare
warnings.
* rj/no-sign-compare:
ALLOC_GROW: avoid -Wsign-compare warnings
cache.h: hex2chr() - avoid -Wsign-compare warnings
commit-slab.h: avoid -Wsign-compare warnings
git-compat-util.h: xsize_t() - avoid -Wsign-compare warnings
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Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Assorted bugfixes and clean-ups.
* ma/ts-cleanups:
ThreadSanitizer: add suppressions
strbuf_setlen: don't write to strbuf_slopbuf
pack-objects: take lock before accessing `remaining`
convert: always initialize attr_action in convert_attrs
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Add a file .tsan-suppressions and list two functions in it: want_color()
and transfer_debug(). Both of these use the pattern
static int foo = -1;
if (foo < 0)
foo = bar();
where bar always returns the same non-negative value. This can cause
ThreadSanitizer to diagnose a race when foo is written from two threads.
That is indeed a race, although it arguably doesn't matter in practice
since it's always the same value that is written.
Add NEEDSWORK-comments to the functions so that this problem is not
forever swept way under the carpet.
The suppressions-file is used by setting the environment variable
TSAN_OPTIONS to, e.g., "suppressions=$(pwd)/.tsan-suppressions". Observe
that relative paths such as ".tsan-suppressions" might not work.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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strbuf_setlen(., 0) writes '\0' to sb.buf[0], where buf is either
allocated and unique to sb, or the global slopbuf. The slopbuf is meant
to provide a guarantee that buf is not NULL and that a freshly
initialized buffer contains the empty string, but it is not supposed to
be written to. That strbuf_setlen writes to slopbuf has at least two
implications:
First, it's wrong in principle. Second, it might be hiding misuses which
are just waiting to wreak havoc. Third, ThreadSanitizer detects a race
when multiple threads write to slopbuf at roughly the same time, thus
potentially making any more critical races harder to spot.
Avoid writing to strbuf_slopbuf in strbuf_setlen. Let's instead assert
on the first byte of slopbuf being '\0', since it helps ensure the
promised invariant of buf[len] == '\0'. (We know that "len" was already
0, or someone has messed with "alloc". If someone has fiddled with the
fields that much beyond the correct interface, they're on their own.)
This is a function which is used in many places, possibly also in hot
code paths. There are two branches in strbuf_setlen already, and we are
adding a third and possibly a fourth (in the assert). In hot code paths,
we hopefully reuse the buffer in order to avoid continous reallocations.
Thus, after a start-up phase, we should always take the same path,
which might help branch prediction, and we would never make the assert.
If a hot code path continuously reallocates, we probably have bigger
performance problems than this new safety-check.
Simple measurements do not contradict this reasoning. 100000000 times
resetting a buffer and adding the empty string takes 5.29/5.26 seconds
with/without this patch (best of three). Releasing at every iteration
yields 18.01/17.87. Adding a 30-character string instead of the empty
string yields 5.61/5.58 and 17.28/17.28(!).
This patch causes the git binary emitted by gcc 5.4.0 -O2 on my machine
to grow from 11389848 bytes to 11497184 bytes, an increase of 0.9%.
I also tried to piggy-back on the fact that we already check alloc,
which should already tell us whether we are using the slopbuf:
if (sb->alloc) {
if (len > sb->alloc - 1)
die("BUG: strbuf_setlen() beyond buffer");
sb->buf[len] = '\0';
} else {
if (len)
die("BUG: strbuf_setlen() beyond buffer");
assert(!strbuf_slopbuf[0]);
}
sb->len = len;
That didn't seem to be much slower (5.38, 18.02, 5.70, 17.32 seconds),
but it does introduce some minor code duplication. The resulting git
binary was 11510528 bytes large (another 0.1% increase).
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When checking the conditional of "while (me->remaining)", we did not
hold the lock. Calling find_deltas would still be safe, since it checks
"remaining" (after taking the lock) and is able to handle all values. In
fact, this could (currently) not trigger any bug: a bug could happen if
`remaining` transitioning from zero to non-zero races with the evaluation
of the while-condition, but these are always separated by the
data_ready-mechanism.
Make sure we have the lock when we read `remaining`. This does mean we
release it just so that find_deltas can take it immediately again. We
could tweak the contract so that the lock should be taken before calling
find_deltas, but let's defer that until someone can actually show that
"unlock+lock" has a measurable negative impact.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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convert_attrs contains an "if-else". In the "if", we set attr_action
twice, and the first assignment has no effect. In the "else", we do not
set it at all. Since git_check_attr always returns the same value, we'll
always end up in the "if", so there is no problem right now. But
convert_attrs is obviously trying not to rely on such an
implementation-detail of another component.
Make the initialization of attr_action after the if-else. Remove the
earlier assignments.
Suggested-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The scripts to drive TravisCI has been reorganized and then an
optimization to avoid spending cycles on a branch whose tip is
tagged has been implemented.
* ls/travis-scriptify:
travis-ci: fix "skip_branch_tip_with_tag()" string comparison
travis: dedent a few scripts that are indented overly deeply
travis-ci: skip a branch build if equal tag is present
travis-ci: move Travis CI code into dedicated scripts
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09f5e97 ("travis-ci: skip a branch build if equal tag is present",
2017-09-17) introduced the "skip_branch_tip_with_tag" function with
a broken string comparison. Fix it!
Reported-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
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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If we push a branch and a tag pointing to the HEAD of this branch,
then Travis CI would run the build twice. This wastes resources and
slows the testing.
Add a function to detect this situation and skip the build the branch
if appropriate. Invoke this function on every build.
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Most of the Travis CI commands are in the '.travis.yml'. The yml format
does not support functions and therefore code duplication is necessary
to run commands across all builds.
To fix this, add a library for common CI functions. Move all Travis CI
code into dedicated scripts and make them call the library first.
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The checkpoint command "git fast-import" did not flush updates to
refs and marks unless at least one object was created since the
last checkpoint, which has been corrected, as these things can
happen without any new object getting created.
* er/fast-import-dump-refs-on-checkpoint:
fast-import: checkpoint: dump branches/tags/marks even if object_count==0
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The checkpoint command cycles packfiles if object_count != 0, a sensible
test or there would be no pack files to write. Since 820b931012, the
command also dumps branches, tags and marks, but still conditionally.
However, it is possible for a command stream to modify refs or create
marks without creating any new objects.
For example, reset a branch (and keep fast-import running):
$ git fast-import
reset refs/heads/master
from refs/heads/master^
checkpoint
but refs/heads/master remains unchanged.
Other example: a commit command that re-creates an object that already
exists in the object database.
The man page also states that checkpoint "updates the refs" and that
"placing a progress command immediately after a checkpoint will inform
the reader when the checkpoint has been completed and it can safely
access the refs that fast-import updated". This wasn't always true
without this patch.
This fix unconditionally calls dump_{branches,tags,marks}() for all
checkpoint commands. dump_branches() and dump_tags() are cheap to call
in the case of a no-op.
Add tests to t9300 that observe the (non-packfiles) effects of
checkpoint.
Signed-off-by: Eric Rannaud <e@nanocritical.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git fast-export" with -M/-C option issued "copy" instruction on a
path that is simultaneously modified, which was incorrect.
* jt/fast-export-copy-modify-fix:
fast-export: do not copy from modified file
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When run with the "-C" option, fast-export writes 'C' commands in its
output whenever the internal diff mechanism detects a file copy,
indicating that fast-import should copy the given existing file to the
given new filename. However, the diff mechanism works against the
prior version of the file, whereas fast-import uses whatever is current.
This causes issues when a commit both modifies a file and uses it as the
source for a copy.
Therefore, teach fast-export to refrain from writing 'C' when it has
already written a modification command for a file.
An existing test in t9350-fast-export is also fixed in this patch. The
existing line "C file6 file7" copies the wrong version of file6, but it
has coincidentally worked because file7 was subsequently overridden.
Reported-by: Juraj Oršulić <juraj.orsulic@fer.hr>
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git branch -M a b" while on a branch that is completely unrelated
to either branch a or branch b misbehaved when multiple worktree
was in use. This has been fixed.
* nd/worktree-kill-parse-ref:
branch: fix branch renaming not updating HEADs correctly
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There are two bugs that sort of work together and cause
problems. Let's start with one in replace_each_worktree_head_symref.
Before fa099d2322 (worktree.c: kill parse_ref() in favor of
refs_resolve_ref_unsafe() - 2017-04-24), this code looks like this:
if (strcmp(oldref, worktrees[i]->head_ref))
continue;
set_worktree_head_symref(...);
After fa099d2322, it is possible that head_ref can be NULL. However,
the updated code takes the wrong exit. In the error case (NULL
head_ref), we should "continue;" to the next worktree. The updated
code makes us _skip_ "continue;" and update HEAD anyway.
The NULL head_ref is triggered by the second bug in add_head_info (in
the same commit). With the flag RESOLVE_REF_READING, resolve_ref_unsafe()
will abort if it cannot resolve the target ref. For orphan checkouts,
HEAD always points to an unborned branch, resolving target ref will
always fail. Now we have NULL head_ref. Now we always update HEAD.
Correct the logic in replace_ function so that we don't accidentally
update HEAD on error. As it turns out, correcting the logic bug above
breaks branch renaming completely, thanks to the second bug.
"git branch -[Mm]" does two steps (on a normal checkout, no orphan!):
- rename the branch on disk (e.g. refs/heads/abc to refs/heads/def)
- update HEAD if it points to the branch being renamed.
At the second step, since the branch pointed to by HEAD (e.g. "abc") no
longer exists on disk, we run into a temporary orphan checkout situation
that has been just corrected to _not_ update HEAD. But we need to update
HEAD since it's not actually an orphan checkout. We need to update HEAD
to move out of that orphan state.
Correct add_head_info(), remove RESOLVE_REF_READING flag. With the flag
gone, we should always return good "head_ref" in orphan checkouts (either
temporary or permanent). With good head_ref, things start to work again.
Noticed-by: Nish Aravamudan <nish.aravamudan@canonical.com>
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: Junio C Hamano <gitster@pobox.com>
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This is the "theoretically more correct" approach of simply
stepping back to the state before plumbing commands started paying
attention to "color.ui" configuration variable.
* jk/ref-filter-colors-fix:
tag: respect color.ui config
Revert "color: check color.ui in git_default_config()"
Revert "t6006: drop "always" color config tests"
Revert "color: make "always" the same as "auto" in config"
color: make "always" the same as "auto" in config
provide --color option for all ref-filter users
t3205: use --color instead of color.branch=always
t3203: drop "always" color test
t6006: drop "always" color config tests
t7502: use diff.noprefix for --verbose test
t7508: use test_terminal for color output
t3701: use test-terminal to collect color output
t4015: prefer --color to -c color.diff=always
test-terminal: set TERM=vt100
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Since 11b087adfd (ref-filter: consult want_color() before
emitting colors, 2017-07-13), we expect that setting
"color.ui" to "always" will enable color tag formats even
without a tty. As that commit was built on top of
136c8c8b8f (color: check color.ui in git_default_config(),
2017-07-13) from the same series, we didn't need to touch
tag's config parsing at all.
However, since we reverted 136c8c8b8f, we now need to
explicitly call git_color_default_config() to make this
work.
Let's do so, and also restore the test dropped in 0c88bf5050
(provide --color option for all ref-filter users,
2017-10-03). That commit swapped out our "color.ui=always"
test for "--color" in preparation for "always" going away.
But since it is here to stay, we should test both cases.
Note that for-each-ref also lost its color.ui support as
part of reverting 136c8c8b8f. But as a plumbing command, it
should _not_ respect the color.ui config. Since it also
gained a --color option in 0c88bf5050, that's the correct
way to ask it for color. We'll continue to test that, and
confirm that "color.ui" is not respected.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This reverts commit 136c8c8b8fa39f1315713248473dececf20f8fe7.
That commit was trying to address a bug caused by 4c7f1819b3
(make color.ui default to 'auto', 2013-06-10), in which
plumbing like diff-tree defaulted to "auto" color, but did
not respect a "color.ui" directive to disable it.
But it also meant that we started respecting "color.ui" set
to "always". This was a known problem, but 4c7f1819b3 argued
that nobody ought to be doing that. However, that turned out
to be wrong, and we got a number of bug reports related to
"add -p" regressing in v2.14.2.
Let's revert 136c8c8b8, fixing the regression to "add -p".
This leaves the problem from 4c7f1819b3 unfixed, but:
1. It's a pretty obscure problem in the first place. I
only noticed it while working on the color code, and we
haven't got a single bug report or complaint about it.
2. We can make a more moderate fix on top by respecting
"never" but not "always" for plumbing commands. This
is just the minimal fix to go back to the working state
we had before v2.14.2.
Note that this isn't a pure revert. We now have a test in
t3701 which shows off the "add -p" regression. This can be
flipped to success.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This reverts commit c5bdfe677cfab5b2e87771c35565d44d3198efda.
That commit was done primarily to prepare for the weakening
of "always" in 6be4595edb (color: make "always" the same as
"auto" in config, 2017-10-03). But since we've now reverted
6be4595edb, there's no need for us to remove "-c
color.ui=always" from the tests. And in fact it's a good
idea to restore these tests, to make sure that "always"
continues to work.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This reverts commit 6be4595edb8e5b616c6e8b9fbc78b0f831fa2a87.
That commit weakened the "always" setting of color config so
that it acted as "auto". This was meant to solve regressions
in v2.14.2 in which setting "color.ui=always" in the on-disk
config broke scripts like add--interactive, because the
plumbing diff commands began to generate color output.
This was due to 136c8c8b8f (color: check color.ui in
git_default_config(), 2017-07-13), which was in turn trying
to fix issues caused by 4c7f1819b3 (make color.ui default to
'auto', 2013-06-10). But in weakening "always", we created
even more problems, as people expect to be able to use "git
-c color.ui=always" to force color (especially because some
commands don't have their own --color flag). We can fix that
by special-casing the command-line "-c", but now things are
getting pretty confusing.
Instead of piling hacks upon hacks, let's start peeling off
the hacks. The first step is dropping the weakening of
"always", which this revert does.
Note that we could actually revert the whole series merged
in by da15b78e52642bd45fd5513ab0000fdf2e58a6f4. Most of that
series consists of preparations to the tests to handle the
weakening of "-c color.ui=always". But it's worth keeping
for a few reasons:
- there are some other preparatory cleanups, like
e433749d86 (test-terminal: set TERM=vt100, 2017-10-03)
- it adds "--color" options more consistently in
0c88bf5050 (provide --color option for all ref-filter
users, 2017-10-03)
- some of the cases dropping "-c" end up being more robust
and realistic tests, as in 01c94e9001 (t7508: use
test_terminal for color output, 2017-10-03)
- the preferred tool for overriding config is "--color",
and we should be modeling that consistently
We can individually revert the few commits necessary to
restore some useful tests (which will be done on top of this
patch).
Note that this isn't a pure revert; we'll keep the test
added in t3701, but mark it as failure for now.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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jk/ref-filter-colors-fix-maint
* 'jk/ui-color-always-to-auto-maint' (early part):
color: make "always" the same as "auto" in config
provide --color option for all ref-filter users
t3205: use --color instead of color.branch=always
t3203: drop "always" color test
t6006: drop "always" color config tests
t7502: use diff.noprefix for --verbose test
t7508: use test_terminal for color output
t3701: use test-terminal to collect color output
t4015: prefer --color to -c color.diff=always
test-terminal: set TERM=vt100
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It can be handy to use `--color=always` (or it's synonym
`--color`) on the command-line to convince a command to
produce color even if it's stdout isn't going to the
terminal or a pager.
What's less clear is whether it makes sense to set config
variables like color.ui to `always`. For a one-shot like:
git -c color.ui=always ...
it's potentially useful (especially if the command doesn't
directly support the `--color` option). But setting `always`
in your on-disk config is much muddier, as you may be
surprised when piped commands generate colors (and send them
to whatever is consuming the pipe downstream).
Some people have done this anyway, because:
1. The documentation for color.ui makes it sound like
using `always` is a good idea, when you almost
certainly want `auto`.
2. Traditionally not every command (and especially not
plumbing) respected color.ui in the first place. So
the confusion came up less frequently than it might
have.
The situation changed in 136c8c8b8f (color: check color.ui
in git_default_config(), 2017-07-13), which negated point
(2): now scripts using only plumbing commands (like
add-interactive) are broken by this setting.
That commit was fixing real issues (e.g., by making
`color.ui=never` work, since `auto` is the default), so we
don't want to just revert it. We could turn `always` into a
noop in plumbing commands, but that creates a hard-to-explain
inconsistency between the plumbing and other commands.
Instead, let's just turn `always` into `auto` for all config.
This does break the "one-shot" config shown above, but again,
we're probably better to have simple and consistent rules than
to try to special-case command-line config.
There is one place where `always` should retain its meaning:
on the command line, `--color=always` should continue to be
the same as `--color`, overriding any isatty checks. Since the
command-line parser also depends on git_config_colorbool(), we
can use the existence of the "var" string to deterine whether
we are serving the command-line or the config.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When ref-filter learned about want_color() in 11b087adfd
(ref-filter: consult want_color() before emitting colors,
2017-07-13), it became useful to be able to turn colors off
and on for specific commands. For git-branch, you can do so
with --color/--no-color.
But for git-for-each-ref and git-tag, the other users of
ref-filter, you have no option except to tweak the
"color.ui" config setting. Let's give both of these commands
the usual color command-line options.
This is a bit more obvious as a method for overriding the
config. And it also prepares us for the behavior of "always"
changing (so that we are still left with a way of forcing
color when our output goes to a non-terminal).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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To test the color output, we must convince "git branch" to
write colors to a non-terminal. We do that now by setting
the color config to "always". In preparation for the
behavior of "always" changing, let's switch to using the
"--color" command-line option, which is more direct.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In preparation for the behavior of "always" changing to
match "auto", we can simply drop this test. We already check
other forms (like "--color") independently.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We test the %C() format placeholders with a variety of
color-inducing options, including "--color" and
"-c color.ui=always". In preparation for the behavior of
"always" changing, we need to do something with those
"always" tests.
We can drop ones that expect "always" to turn on color even
to a file, as that will become a synonym for "auto", which
is already tested.
For the "--no-color" test, we need to make sure that color
would otherwise be shown. To do this, we can use
test_terminal, which enables colors in the default setup.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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To check that "status -v" respects diff config, we set
"color.diff" and look at the output of "status". We could
equally well use any diff config. Since color output depends
on a lot of other factors (like whether stdout is a tty, and
how we interpret "always"), let's use a more mundane option.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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