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A patch that contains no actual diff, and that doesn't change any
meta-data is bad. It shouldn't be a patch at all, and git-apply shouldn't
just accept it.
This caused a corrupted patch to be silently applied as an empty change in
the kernel, because the corruption ended up making the patch look empty.
An example of such a patch is one that contains the patch header, but
where the initial fragment header (the "@@ -nr,.." line) is missing,
causing us to not parse any fragments.
The real "patch" program will also flag such patches as bad, with the
message
patch: **** Only garbage was found in the patch input.
and we should do likewise.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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The message "\ No newline at end of file" used by diff(1) to mark
an incomplete line is locale dependent. We can't assume more than
that it begins with "\ ".
For example, given two files, "foo" and "bar", with appropriate
contents, 'diff -u foo bar' will produce the following output on
my system:
--- foo 2005-09-04 18:59:38.000000000 +0200
+++ bar 2005-09-04 18:59:16.000000000 +0200
@@ -1 +1 @@
-foobar
+foo
\ Ingen nyrad vid filslut
[jc: the check for the marker still uses the line length being no less
than 12 bytes for a sanity check, but I think it is safe to assume
that in other locales. I haven't checked the .po files from diff, tho'.]
Signed-off-by: Fredrik Kuivinen <freku045@student.liu.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Stop processing and return NULL if we encounter a '\n' character
before we have two matching names in the git header.
Signed-off-by: Robert Fitzsimons <robfitz@273k.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Omitting the first branch in ?: is a GNU extension. Cute,
but not supported by other compilers. Replaced mostly
by explicit tests. Calls to getenv() simply are repeated
on non-GNU compilers.
Signed-off-by: Jason Riedy <ejr@cs.berkeley.edu>
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Without this patch, git-apply does not retain the mode when renaming or
copying files.
[jc: Good catch, Johannes. I added a test case to demonstrate the
breackage in the original.]
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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GCC's format __attribute__ is good for checking errors, especially
with -Wformat=2 parameter. This fixes most of the reported problems
against 2005-08-09 snapshot.
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When git-apply was printing out long filenames, it used to just truncate
them to show the last "max_len" characters of the filename. Which can be
really quite ugly (note the two filenames that have just been silently
truncated from the beginning - it looks even worse when there are lots
of them, like there were in the current v2.6.13-rc4 cris arch update):
Documentation/video4linux/README.saa7134 | 9
Documentation/video4linux/bttv/Cards | 74
umentation/video4linux/hauppauge-wintv-cx88-ir.txt | 54
Documentation/video4linux/lifeview.txt | 42
mentation/video4linux/not-in-cx2388x-datasheet.txt | 41
Documentation/w1/w1.generic | 107
With this patch it now looks like so:
Documentation/video4linux/README.saa7134 | 9
Documentation/video4linux/bttv/Cards | 74
.../video4linux/hauppauge-wintv-cx88-ir.txt | 54
Documentation/video4linux/lifeview.txt | 42
.../video4linux/not-in-cx2388x-datasheet.txt | 41
Documentation/w1/w1.generic | 107
ie we've made it clear with an ellipsis that we've cut off something from
the beginning, and it also tries to do it cleanly at a subdirectory level.
Signed-off-by: Linus "good taste" Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Adds --exclude=pattern option to the "git-apply" command. This
was useful while reimporting the BKCVS patchset dump of the
Linux kernel, starting at 2.4.0 and ending at 2.6.12-rc2 Ingo
announced some time ago to exclude BitKeeper directory.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The parsing code had a bug that failed to recognize an
incomplete line at the end of a fragment, and the fragment
application code had a comparison bug to recognize such. Fix
them to handle incomplete lines correctly.
Add a test script for patches with various combinations of
complete and incomplete lines to make sure the fix works.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The more recent --apply option was not described.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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We write them under another name and rename them to their destination,
so that if something bad happens in the middle, we won't have caused any
bigger harm.
Also, this makes the writing be NFS "intr" safe, and as a side effects
makes sure that if the target is hardlinked (or symlinked) we will have
broken the link.
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apply.c: In function `show_rename_copy':
apply.c:1147: warning: field precision is not type int (arg 3)
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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IIRC our strategy was to let the users' umask take care of the
final mode bits. This patch fixes places that deviate from it.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Mainly making a lot of local functions and variables be marked "static",
but there was a "zero as NULL" warning in there too.
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diffstat
Also, remove debugging statement about applying a fragment at an offset.
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Typical expected usage is "git-apply --stat --summary" to show
diffstat plus dense description of information available in git
extended headers, such as creations, renames, and mode changes.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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When a patch is a git extended rename/copy patch, "git-apply
--stat" showed the old filename. Change it to show the new
filename, because most of the time we are interested in looking
at the resulting tree.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Applying Andrew's latest patch-bomb showed us failing miserably if a new
subdirectory needed to be created.. That said, it's uncommon enough
that it's worth optimistically assuming it won't be needed, and then
creating the subdirectories only on failure.
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Diffs with only mode changes didn't pass through git-apply --stat.
[ Linus' note: they did for me, on my ppc64, where division by zero just
silently returns zero. Duh. ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Pure mode changes won't have the file-name in the extended header lines,
so make sure we pick it up from the default name from the "diff --git"
line.
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Sine git only saves the 'x' bit, we shouldn't compare the stat contents
directly.
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Missing argument for error() function. We should really use the
gcc printf format checking capabilities.
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A meaningful (ie non-empty) git patch always has more information in the
header than just the "diff --git" line itself: it needs to have either a
patch associated with it (which implies "---" and "+++" lines in the
header) or it needs to have rename/copy/delete/create information in it.
Just ignore git patches which have no change information. Otherwise we'll
end up with a patch that doesn't have filenames etc filled in, and we'll
be unhappy.
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(but it will result in a warning)
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Clearly even Junio felt git "rename" header lines should say "from/to"
instead of "old/new", since he wrote the documentation that way.
This way it also matches "copy".
git-apply will accept both versions, at least for a while.
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A "--stat" or a "--check" will just be quiet, but if
you try to apply something with no changes, that's an
error.
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It's not "rename from" and "rename to", it's "rename old" and "rename new".
Which is illogical and doesn't match the "copy from/to" case, but that's
life. Maybe Junio will fix it up one of these days.
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We update the index only if the "--index" flag is given,
so you can actually use this as a strange kind of "patch"
program even for non-git usage. Not that you'd likely
want to, but it comes in handy for testing.
This _should_ more or less get everythign right, but as
usual I leave the testing to the usrs..
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(And fix name handling for when we have an implied
create or delete event from a traditional diff).
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This applies the fragments in memory, but doesn't actually
write the results out to the files yet. But we now do all the
difficult parts, the rest is just basically writing the
results out and updating the index.
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Right now it requires that the fragment offsets be exact,
and it doesn't actually apply the fragment yet, but it
does find where it goes and verify the data.
Next step: actually applying the fragment changes.
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It had already tried to do that, but with the independent
rounding of the number of '+' and '-' characters, it would
sometimes do 80-char lines after all.
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It just causes things like "git-apply --stat" to parse traditional
patch headers differently depending on what your index is, which
is nasty.
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The way broken deletes and creates are shown in the -p
(diff-patch) output format has become consistent with how
rename/copy edits are shown. They will show "dissimilarity
index" value, immediately following the "deleted file mode" and
"new file mode" lines.
The git-apply is taught to grok such an extended header.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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It currently only verifies the index against the working directory,
it doesn't actually verify the diff fragments themselves yet.
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This means that filenames are totally unambiguous even if they
have spaces or tabs in them.
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Pure mode changes, and deletes or creates of empty files won't have this
information anywhere else.
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Slowly this is takign the form of a program that we'd actually
use. Now "git-apply --stat" basically ends up being a perfectly
useful diffstat.
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Hey, it's almost free by now, and it's a good way to see that
we parse the patches correctly.
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Make it a clear two-phase thing: first a read-only parse of
the patch itself (which is independent of any current index
information), and then the second phase actually uses the patch.
The second phase might not be a real apply, it could be just a
diffstat, for example. Which is trivial to do once the patch is
parsed.
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Not important but I am a bit annoyed by gcc complaining about the
control falling out of the function without returning value.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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There's some duplication of filenames when doing filename operations
(creates, deletes, renames and copies), and this makes us verify that
the pathnames match when they should.
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Right now we only use it to figure out what the filename might
be when that is ambiguous, but we'll get there..
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This makes it act more like a traditional UNIX thing (eg "cat").
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.. and print out the information. This sets up all the pathname
information, and whether it's a new file, deleted file, rename,
copy or whatever.
It's slowly getting to the point where it all comes together,
and we can actually apply all the information that we've gathered.
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In particular, give line numbers when detecting corrupt patches.
This makes the tool a lot more friendly (indeed, much more so
than regular "patch", I think).
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Don't just stop at them and look for the next header. Die,
die, die!
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This applies git patches (and old-style unified diffs)
in the index, rather than doing it in the working directory.
That allows for a lot more flexibility, and means that if a
patch fails, we aren't going to mess up the working directory.
NOTE! This is just the first cut at it, and right now it only
parses the incoming patch, it doesn't actually apply it yet.
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Linus Torvalds
Fredrik Kuivinen
Junio C Hamano
Robert Fitzsimons
Jason Riedy
Johannes Schindelin
Timo Sirainen
Linus Torvalds
Tony Luck
Linus Torvalds
Sven Verdoolaege