It does not make much sense to build git whose behaviour is
different depending on the brokenness of diff implementation of
the platform because the brokenness of the patch that is applied
with the tool depends on brokenness of the diff the person who
generates the patch uses. So we do not use NO_ACCURATE_DIFF
anymore, but help people to apply patches that do not record
incomplete lines correctly with a runtime flag.
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
ANSI C99 doesn't allow void-pointer arithmetic. This patch fixes this in
various ways. Usually the strategy that required the least changes was used.
Signed-off-by: Florian Forster <octo@verplant.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
The framework to create lockfiles that are removed at exit is
first used to reliably write the index file, but it is
applicable to other things, so stop calling it "cache_file".
This also rewords a few remaining error message that called the
index file "cache file".
Signed-off-by: Junio C Hamano <junkio@cox.net>
The --cached mode does not deal with the working tree, so we
should not check it with lstat. An earlier code omitted the
call to lstat but forgot to omit the check for the errno.
Signed-off-by: Junio C Hamano <junkio@cox.net>
A new flag "--cached" takes the cached data, applies the patch
and stores the result in the index, without using the working
tree.
Signed-off-by: Junio C Hamano <junkio@cox.net>
When multiple patches are passed to git-apply, it will attempt
to open multiple file descriptors to an index, which means
multiple entries will be in the circular cache_file_list.
This change makes git-apply only open the index once and
write the index at exit.
Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This updates the user interface and generated diff data format.
* "diff --binary" is used to signal that we want an e-mailable
binary patch. It implies --full-index and -p.
* "apply --allow-binary-replacement" acquired a short synonym
"apply --binary".
* After the "GIT binary patch\n" header line there is a token
to record which binary patch mechanism was used, so that we
can extend it later. Currently there are two mechanisms
defined: "literal" and "delta". The former records the
deflated postimage and the latter records the deflated delta
from the preimage to postimage.
For purely implementation convenience, I added the deflated
length after these "literal/delta" tokens (otherwise the
decoding side needs to guess and reallocate the buffer while
inflating). Improvement patches are very welcomed.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This adds "binary patch" to the diff output and teaches apply
what to do with them.
On the diff generation side, traditionally, we said "Binary
files differ\n" without giving anything other than the preimage
and postimage object name on the index line. This was good
enough for applying a patch generated from your own repository
(very useful while rebasing), because the postimage would be
available in such a case. However, this was not useful when the
recipient of such a patch via e-mail were to apply it, even if
the preimage was available.
This patch allows the diff to generate "binary" patch when
operating under --full-index option. The binary patch follows
the usual extended git diff headers, and looks like this:
"GIT binary patch\n"
<length byte><data>"\n"
...
"\n"
Each line is prefixed with a "length-byte", whose value is upper
or lowercase alphabet that encodes number of bytes that the data
on the line decodes to (1..52 -- 'A' means 1, 'B' means 2, ...,
'Z' means 26, 'a' means 27, ...). <data> is 1 or more groups of
5-byte sequence, each of which encodes up to 4 bytes in base85
encoding. Because 52 / 4 * 5 = 65 and we have the length byte,
an output line is capped to 66 characters. The payload is the
same diff-delta as we use in the packfiles.
On the consumption side, git-apply now can decode and apply the
binary patch when --allow-binary-replacement is given, the diff
was generated with --full-index, and the receiving repository
has the preimage blob, which is the same condition as it always
required when accepting an "Binary files differ\n" patch.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This updates git-apply to maintain cache-tree information. With
this and the previous write-tree patch, repeated "apply --index"
followed by "write-tree" on a huge tree will hopefully become
faster.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Ok this really should be the good version. The option
handling has been reworked to be automation safe.
Currently to import the -mm tree I have to work around
git-apply by using patch. Because some of Andrews
patches in quilt will only apply with fuzz.
I started out implementing a --fuzz option and then I realized
fuzz is not a very safe concept for an automated system. What
you really want is a minimum number of context lines that must
match. This allows policy to be set without knowing how many
lines of context a patch actually provides. By default
the policy remains to match all provided lines of context.
Allowng git-apply to match a restricted set of context makes
it much easier to import the -mm tree into git. I am still only
processing 1.5 to 1.6 patches a second for the 692 patches in
2.6.17-rc1-mm2 is still painful but it does help.
If I just loop through all of Andrews patches in order
and run git-apply --index -C1 I process the entire patchset
in 1m53s or about 6 patches per second. So running
git-mailinfo, git-write-tree, git-commit-tree, and
git-update-ref everytime has a measurable impact,
and shows things can be speeded up even more.
All of these timings were taking on my poor 700Mhz Athlon
with 512MB of ram. So people with fast machiens should
see much better performance.
When a match is found after the number of context are reduced a
warning is generated. Since this is a rare event and possibly
dangerous this seems to make sense. Unless you are patching
a single file the error message is a little bit terse at
the moment, but it should be easy to go back and fix.
I have also updated the documentation for git-apply to reflect
the new -C option that sets the minimum number of context
lines that must match.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This replaces occurences of "blob", "commit", "tag", and "tree",
where they're really used as type specifiers, which we already
have defined global constants for.
Signed-off-by: Peter Eriksen <s022018@student.dtu.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This was triggered by me testing the "@@" numbering shorthand by GNU
patch, which not only showed that git-apply thought it meant the number
was duplicated (when it means that the second number is 1), but my tests
showed than when git-apply mis-understood the number, it would then not
raise an alarm about it if the patch ended early.
Now, this doesn't actually _matter_, since with a three-line context, the
only case that "x,1" will be shorthanded to "x" is when x itself is 1 (in
which case git-apply got it right), but the fact that git-apply would also
silently accept truncated patches was a missed opportunity for additional
sanity-checking.
So make git-apply refuse to look at a patch fragment that ends early.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Sometimes it is convient for a Porcelain to be able to checkout all
unmerged files in all stages so that an external merge tool can be
executed by the Porcelain or the end-user. Using git-unpack-file
on each stage individually incurs a rather high penalty due to the
need to fork for each file version obtained. git-checkout-index -a
--stage=all will now do the same thing, but faster.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
We were missing the --whitespace option in the usage string for
git-apply and git-am, so this commit adds them.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This changes the default --whitespace policy to nowarn when we
are only getting --stat, --summary etc. IOW when not applying
the patch. When applying the patch, the default is warn (spit
out warning message but apply the patch).
Signed-off-by: Junio C Hamano <junkio@cox.net>
This changes the default --whitespace policy to nowarn when we
are only getting --stat, --summary etc. IOW when not applying
the patch. When applying the patch, the default is warn (spit
out warning message but apply the patch).
Signed-off-by: Junio C Hamano <junkio@cox.net>
Andrew insists --whitespace=warn should be the default, and I
tend to agree. This introduces --whitespace=warn, so if your
project policy is more lenient, you can squelch them by having
apply.whitespace=nowarn in your configuration file.
Signed-off-by: Junio C Hamano <junkio@cox.net>
The new configuration option apply.whitespace can take one of
"warn", "error", "error-all", or "strip". When git-apply is run
to apply the patch to the index, they are used as the default
value if there is no command line --whitespace option.
Andrew can now tell people who feed him git trees to update to
this version and say:
git repo-config apply.whitespace error
Signed-off-by: Junio C Hamano <junkio@cox.net>
This by default makes --whitespace=warn, error, and strip to
warn only the first 5 additions of trailing whitespaces. A new
option --whitespace=error-all can be used to view all of them
before applying.
Signed-off-by: Junio C Hamano <junkio@cox.net>
In addition to fixing obvious command line parsing bugs in the
previous round, this changes the following:
* Adds "--whitespace=strip". This applies after stripping the
new trailing whitespaces introduced to the patch.
* The output error message format is changed to say
"patch-filename:linenumber:contents of the line". This makes
it similar to typical compiler error message format, and
helps C-x ` (next-error) in Emacs compilation buffer.
* --whitespace=error and --whitespace=warn do not stop at the
first error. We might want to limit the output to say first
20 such lines to prevent cluttering, but on the other hand if
you are willing to hand-fix after inspecting them, getting
everything with a single run might be easier to work with.
After all, somebody has to do the clean-up work somewhere.
Signed-off-by: Junio C Hamano <junkio@cox.net>
On Sat, 25 Feb 2006, Andrew Morton wrote:
>
> I'd suggest a) git will simply refuse to apply such a patch unless given a
> special `forcing' flag, b) even when thus forced, it will still warn and c)
> with a different flag, it will strip-then-apply, without generating a
> warning.
This doesn't do the "strip-then-apply" thing, but it allows you to make
git-apply generate a warning or error on extraneous whitespace.
Use --whitespace=warn to warn, and (surprise, surprise) --whitespace=error
to make it a fatal error to have whitespace at the end.
Totally untested, of course. But it compiles, so it must be fine.
HOWEVER! Note that this literally will check every single patch-line with
"+" at the beginning. Which means that if you fix a simple typo, and the
line had a space at the end before, and you didn't remove it, that's still
considered a "new line with whitespace at the end", even though obviously
the line wasn't really new.
I assume this is what you wanted, and there isn't really any sane
alternatives (you could make the warning activate only for _pure_
additions with no deletions at all in that hunk, but that sounds a bit
insane).
Linus
Andrew insists --whitespace=warn should be the default, and I
tend to agree. This introduces --whitespace=warn, so if your
project policy is more lenient, you can squelch them by having
apply.whitespace=nowarn in your configuration file.
Signed-off-by: Junio C Hamano <junkio@cox.net>
The new configuration option apply.whitespace can take one of
"warn", "error", "error-all", or "strip". When git-apply is run
to apply the patch to the index, they are used as the default
value if there is no command line --whitespace option.
Andrew can now tell people who feed him git trees to update to
this version and say:
git repo-config apply.whitespace error
Signed-off-by: Junio C Hamano <junkio@cox.net>
This by default makes --whitespace=warn, error, and strip to
warn only the first 5 additions of trailing whitespaces. A new
option --whitespace=error-all can be used to view all of them
before applying.
Signed-off-by: Junio C Hamano <junkio@cox.net>
In addition to fixing obvious command line parsing bugs in the
previous round, this changes the following:
* Adds "--whitespace=strip". This applies after stripping the
new trailing whitespaces introduced to the patch.
* The output error message format is changed to say
"patch-filename:linenumber:contents of the line". This makes
it similar to typical compiler error message format, and
helps C-x ` (next-error) in Emacs compilation buffer.
* --whitespace=error and --whitespace=warn do not stop at the
first error. We might want to limit the output to say first
20 such lines to prevent cluttering, but on the other hand if
you are willing to hand-fix after inspecting them, getting
everything with a single run might be easier to work with.
After all, somebody has to do the clean-up work somewhere.
Signed-off-by: Junio C Hamano <junkio@cox.net>
On Sat, 25 Feb 2006, Andrew Morton wrote:
>
> I'd suggest a) git will simply refuse to apply such a patch unless given a
> special `forcing' flag, b) even when thus forced, it will still warn and c)
> with a different flag, it will strip-then-apply, without generating a
> warning.
This doesn't do the "strip-then-apply" thing, but it allows you to make
git-apply generate a warning or error on extraneous whitespace.
Use --whitespace=warn to warn, and (surprise, surprise) --whitespace=error
to make it a fatal error to have whitespace at the end.
Totally untested, of course. But it compiles, so it must be fine.
HOWEVER! Note that this literally will check every single patch-line with
"+" at the beginning. Which means that if you fix a simple typo, and the
line had a space at the end before, and you didn't remove it, that's still
considered a "new line with whitespace at the end", even though obviously
the line wasn't really new.
I assume this is what you wanted, and there isn't really any sane
alternatives (you could make the warning activate only for _pure_
additions with no deletions at all in that hunk, but that sounds a bit
insane).
Linus
Some versions of diff do not correctly detect a missing new-line at the end
of the file under certain circumstances.
When defining NO_ACCURATE_DIFF, work around this bug.
Signed-off-by: Johannes E. Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This adds "assume unchanged" logic, started by this message in the list
discussion recently:
<Pine.LNX.4.64.0601311807470.7301@g5.osdl.org>
This is a workaround for filesystems that do not have lstat()
that is quick enough for the index mechanism to take advantage
of. On the paths marked as "assumed to be unchanged", the user
needs to explicitly use update-index to register the object name
to be in the next commit.
You can use two new options to update-index to set and reset the
CE_VALID bit:
git-update-index --assume-unchanged path...
git-update-index --no-assume-unchanged path...
These forms manipulate only the CE_VALID bit; it does not change
the object name recorded in the index file. Nor they add a new
entry to the index.
When the configuration variable "core.ignorestat = true" is set,
the index entries are marked with CE_VALID bit automatically
after:
- update-index to explicitly register the current object name to the
index file.
- when update-index --refresh finds the path to be up-to-date.
- when tools like read-tree -u and apply --index update the working
tree file and register the current object name to the index file.
The flag is dropped upon read-tree that does not check out the index
entry. This happens regardless of the core.ignorestat settings.
Index entries marked with CE_VALID bit are assumed to be
unchanged most of the time. However, there are cases that
CE_VALID bit is ignored for the sake of safety and usability:
- while "git-read-tree -m" or git-apply need to make sure
that the paths involved in the merge do not have local
modifications. This sacrifices performance for safety.
- when git-checkout-index -f -q -u -a tries to see if it needs
to checkout the paths. Otherwise you can never check
anything out ;-).
- when git-update-index --really-refresh (a new flag) tries to
see if the index entry is up to date. You can start with
everything marked as CE_VALID and run this once to drop
CE_VALID bit for paths that are modified.
Most notably, "update-index --refresh" honours CE_VALID and does
not actively stat, so after you modified a file in the working
tree, update-index --refresh would not notice until you tell the
index about it with "git-update-index path" or "git-update-index
--no-assume-unchanged path".
This version is not expected to be perfect. I think diff
between index and/or tree and working files may need some
adjustment, and there probably needs other cases we should
automatically unmark paths that are marked to be CE_VALID.
But the basics seem to work, and ready to be tested by people
who asked for this feature.
Signed-off-by: Junio C Hamano <junkio@cox.net>
As far as I can see, create_subdirectories() in apply.c just
duplicates the functionality of safe_create_leading_directories() from
sha1_file.c. The former has a warm, fuzzy const parameter, but that's
not important.
The potential problem with EEXIST and creating directories should
never occur here, but will be removed by future
safe_create_leading_directories() changes. Other uses of EEXIST in
apply.c should be fine barring intentionally malicious behavior.
Signed-off-by: Jason Riedy <ejr@cs.berkeley.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This only applies to traditional diffs, not to git diffs.
Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
It can happen if the temporary file already exists (i.e. after a panic
and reboot).
Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
We had errno==EINTR check after read(2)/write(2) sprinkled all
over the places, always doing continue. Consolidate them into
xread()/xwrite() wrapper routines.
Credits for suggestion goes to HPA -- bugs are mine.
Signed-off-by: Junio C Hamano <junkio@cox.net>
When applying a patch to index file, we need to know where GIT_DIR is;
use setup_git_directory() to find it out. This also allows us to work
from a subdirectory if we wanted to.
When git-apply is run from a subdirectory, it applies the given patch
only to the files under the current directory and below.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Some vintage of diff says just "Files X and Y differ\n", instead
of "Binary files X and Y differ\n", so catch both patterns.
Signed-off-by: Junio C Hamano <junkio@cox.net>
A new option, --allow-binary-replacement, is introduced.
When you feed a diff that records full SHA1 name of pre- and
post-image blob on its index line to git-apply with this option,
the post-image blob replaces the path if what you have in the
working tree matches the pre-image _and_ post-image blob is
already available in the object directory.
Later we _might_ want to enhance the diff output to also include
the full binary data of the post-image, to make this more
useful, but this is good enough for local rebasing application.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Recently we fixed 'git-apply --stat' not to barf on a binary
differences. But it accidentally broke the error detection when
we actually attempt to apply them.
This commit fixes the problem and adds test cases.
Signed-off-by: Junio C Hamano <junkio@cox.net>
The comparison to find "Binary files " string was looking at a
wrong place when offset != 0.
Also, we may have the full 40-byte textual sha1 on the index
line; two off-by-one errors prevented it.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This is a specialized hack to help no-base merges, but other
people might find it useful, so let's document it.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Unlike the previous round that merged the path added differently
in each branches using emptiness as the base, compute a common
version and use it as input to 'merge' program.
This would show the resulting (still conflicting) file left in
the working tree as:
common file contents...
<<<<<< FILENAME
version from our branch...
======
version from their branch...
>>>>>> .merge_file_XXXXXX
more common file contents...
when both sides added similar contents.
Signed-off-by: Junio C Hamano <junkio@cox.net>
We run git-apply with --stat and --summary at the end of the pull
by default, which causes it to barf when the pull brought in changes
to binary files. Just mark them as binary patch and proceed when
not applying nor checking.
[jc: I almost missed --check until I saw Linus did something similar.]
Signed-off-by: Junio C Hamano <junkio@cox.net>
The new option, --numstat, shows number of inserted and deleted
lines for each path. It is similar to --stat output but is
meant to be more machine friendly by giving number of added and
deleted lines and unabbreviated paths.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Johannes Schindelin