The goal of the patch is to introduce the GNU diff
-B/--ignore-blank-lines as closely as possible. The short option is not
available because it's already used for "break-rewrites".
When this option is used, git-diff will not create hunks that simply
add or remove empty lines, but will still show empty lines
addition/suppression if they are close enough to "valuable" changes.
There are two differences between this option and GNU diff -B option:
- GNU diff doesn't have "--inter-hunk-context", so this must be handled
- The following sequence looks like a bug (context is displayed twice):
$ seq 5 >file1
$ cat <<EOF >file2
change
1
2
3
4
5
change
EOF
$ diff -u -B file1 file2
--- file1 2013-06-08 22:13:04.471517834 +0200
+++ file2 2013-06-08 22:13:23.275517855 +0200
@@ -1,5 +1,7 @@
+change
1
2
+
3
4
5
@@ -3,3 +5,4 @@
3
4
5
+change
So here is a more thorough description of the option:
- real changes are interesting
- blank lines that are close enough (less than context size) to
interesting changes are considered interesting (recursive definition)
- "context" lines are used around each hunk of interesting changes
- If two hunks are separated by less than "inter-hunk-context", they
will be merged into one.
The implementation does the "interesting changes selection" in a single
pass.
Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Normally it doesn't matter if we show the pre-image or th post-image
for the common parts of a diff because they are the same. If
white-space changes are ignored they can differ, though. The
new text after applying the diff is more interesting in that case,
so show that instead of the old contents.
Note: GNU diff shows the pre-image.
Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A new whitespace "rule" is added that sets the tab width to use for
whitespace checks and fix-ups and replaces the hard-coded constant 8.
Since the setting is part of the rules, it can be set per file using
.gitattributes.
The new configuration is backwards compatible because older git versions
simply ignore unknown whitespace rules.
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Breaks in a test assertion's && chain can potentially hide
failures from earlier commands in the chain.
Commands intended to fail should be marked with !, test_must_fail, or
test_might_fail. The examples in this patch do not require that.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When a line contains nothing but whitespace with at least one tab
and the core.whitespace config option contains blank-at-eol, the
whitespace on the line is being printed twice, once unhighlighted
(unless otherwise matched by one of the other core.whitespace values),
and a second time highlighted for blank-at-eol.
Update the leading indentation check to stop checking when it reaches
the trailing whitespace.
Signed-off-by: Kevin Ballard <kevin@sb.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A bug was introduced in 3e97c7c6af
(No diff -b/-w output for all-whitespace changes, Nov 19 2009)
that made the lines:
diff --git a/bar b/sub/bar
similarity index 100%
rename from bar
rename to sub/bar
disappear from "git show -C -C" output when file bar is a binary
file.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Change git-diff's whitespace-ignoring modes to generate
output only if a non-empty patch results, which git-apply
rejects.
Update the tests to look for the new behavior.
Signed-off-by: Greg Bacon <gbacon@dbresearch.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* 'jc/maint-1.6.0-blank-at-eof' (early part):
diff --whitespace: fix blank lines at end
core.whitespace: split trailing-space into blank-at-{eol,eof}
diff --color: color blank-at-eof
diff --whitespace=warn/error: fix blank-at-eof check
diff --whitespace=warn/error: obey blank-at-eof
diff.c: the builtin_diff() deals with only two-file comparison
apply --whitespace: warn blank but not necessarily empty lines at EOF
apply --whitespace=warn/error: diagnose blank at EOF
apply.c: split check_whitespace() into two
apply --whitespace=fix: detect new blank lines at eof correctly
apply --whitespace=fix: fix handling of blank lines at the eof
The "diff --check" logic used to share the same issue as the one fixed for
"git apply" earlier in this series, in that a patch that adds new blank
lines at end could appear as
@@ -l,5 +m,7 @@$
_context$
_context$
-deleted$
+$
+$
+$
_$
_$
where _ stands for SP and $ shows a end-of-line. Instead of looking at
each line in the patch in the callback, simply count the blank lines from
the end in two versions, and notice the presence of new ones.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The "diff --check" code used to conflate trailing-space whitespace error
class with this, but now we have a proper separate error class, we should
check it under blank-at-eof, not trailing-space.
The whitespace error is not about _having_ blank lines at end, but about
adding _new_ blank lines. To keep the message consistent with what is
given by "git apply", call whitespace_error_string() to generate it,
instead of using a hardcoded custom message.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The code used to misbehave when options to ignore certain whitespaces
(-w -b and --ignore-at-eol) were combined.
Signed-off-by: Keith Cascio <keith@cs.ucla.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are three flags involved (-w -b and --ignore-space-at-eol) which
makes 8 combinations possible in total, but only 3 cases are tested (none,
-w alone and -b alone).
This adds the other 5 cases.
Signed-off-by: Keith Cascio <keith@cs.ucla.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are three flags involved (-w -b and --ignore-space-at-eol) which
makes 8 combinations possible in total, but only 3 cases are tested (none,
-w alone and -b alone).
This adds the other 5 cases.
Signed-off-by: Keith Cascio <keith@cs.ucla.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix git-diff to make it produce useful 3-way diffs for merge conflicts in
repositories with autocrlf enabled. Otherwise it always reports that the
whole file was changed, because it uses the contents from the working tree
without necessary conversion.
Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The code remembered that the last diff output it saw was an empty line,
and tried to reset that state whenever it sees a context line, a non-blank
new line, or a new hunk. However, this codepath asks the underlying diff
engine to feed diff without any context, and the "just saw an empty line"
state was not reset if you added a new blank line in the last hunk of your
patch, even if it is not the last line of the file.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Many test scripts assumed that they will start in a 'trash' subdirectory
that is a single level down from the t/ directory, and referred to their
test vector files by asking for files like "../t9999/expect". This will
break if we move the 'trash' subdirectory elsewhere.
To solve this, we earlier introduced "$TEST_DIRECTORY" so that they can
refer to t/ directory reliably. This finally makes all the tests use
it to refer to the outside environment.
With this patch, and a one-liner not included here (because it would
contradict with what Dscho really wants to do):
| diff --git a/t/test-lib.sh b/t/test-lib.sh
| index 70ea7e0..60e69e4 100644
| --- a/t/test-lib.sh
| +++ b/t/test-lib.sh
| @@ -485,7 +485,7 @@ fi
| . ../GIT-BUILD-OPTIONS
|
| # Test repository
| -test="trash directory"
| +test="trash directory/another level/yet another"
| rm -fr "$test" || {
| trap - exit
| echo >&5 "FATAL: Cannot prepare test area"
all the tests still pass, but we would want extra sets of eyeballs on this
type of change to really make sure.
[jc: with help from Stephan Beyer on http-push tests I do not run myself;
credits for locating silly quoting errors go to Olivier Marin.]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This patch changes every occurrence of "! git" -- with the meaning
that a git call has to gracefully fail -- into "test_must_fail git".
This is useful to
- make sure the test does not fail because of a signal,
e.g. SIGSEGV, and
- advertise the use of "test_must_fail" for new tests.
Signed-off-by: Stephan Beyer <s-beyer@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When a patch adds new blank lines at the end, "git apply --whitespace"
warns. This teaches "diff --check" to do the same.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
All of these violations are necessary parts of the tests
(which are generally checking the behavior of trailing
whitespace, or contain diff fragments with empty lines).
Our solution is two-fold:
1. Process input with whitespace problems using tr. This
has the added bonus that it becomes very obvious where
the bogus whitespace is intended to go.
2. Move large diff fragments into their own supplemental
files. This gets rid of the whitespace problem, since
supplemental files are not checked, and it also makes
the test script a bit easier to read.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As a general principle, we should not use "git diff" to validate the
results of what git command that is being tested has done. We would not
know if we are testing the command in question, or locating a bug in the
cute hack of "git diff --no-index".
Rather use test_cmp for that purpose.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
c1795bb (Unify whitespace checking) incorrectly made the
checking function return without incrementing the line numbers
when there is no whitespace problem is found on a '+' line.
This resurrects the earlier behaviour.
Noticed and reported by Jay Soffian. The test script was stolen
from Jay's independent fix.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
After this patch, "written" counts the number of bytes up to and
including the most recently seen tab. This allows us to detect (and
count) spaces by comparing to "i".
This allows catching initial indents like '\t ' (a tab followed
by 8 spaces), while previously indent-with-non-tab caught only indents
that consisted entirely of spaces.
This also allows fixing an indent-with-non-tab regression, so we can
again detect indents like '\t \t'.
Also update tests to catch these cases.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If there were no tabs, and the last space was at position 7, then
positions 0..7 had spaces, so there were 8 spaces.
Update test to check exactly this case.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The initial version of the whitespace_error_string() function took the
messages from builtin-apply.c rather than the shorter messages from
diff.c.
This commit addresses Junio's concern that these messages might be too
long (now that we can emit multiple warnings per line).
Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Make sure that "git diff --check" does the right thing when the
core.whitespace options are set.
While we are at it, correct many uses of test_expect_failure that
ran sequence of commands.
Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit unifies three separate places where whitespace checking was
performed:
- the whitespace checking previously done in builtin-apply.c is
extracted into a function in ws.c
- the equivalent logic in "git diff" is removed
- the emit_line_with_ws() function is also removed because that also
rechecks the whitespace, and its functionality is rolled into ws.c
The new function is called check_and_emit_line() and it does two things:
checks a line for whitespace errors and optionally emits it. The checking
is based on lines of content rather than patch lines (in other words, the
caller must strip the leading "+" or "-"); this was suggested by Junio on
the mailing list to allow for a future extension to "git show" to display
whitespace errors in blobs.
At the same time we teach it to report all classes of whitespace errors
found for a given line rather than reporting only the first found error.
Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There is no reason --exit-code and --check-diff must be mutually
exclusive, so assign different bits to different results and allow them
to be returned from the command. Introduce diff_result_code() to factor
out the common code to decide final status code based on diffopt
settings and use it everywhere.
Update tests to match the above fix.
Turning pager off when "diff --check" is used is a regression.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git diff" has a --check option that can be used to check for whitespace
problems but it only reported by printing warnings to the
console.
Now when the --check option is used we give a non-zero exit status,
making "git diff --check" nicer to use in scripts and hooks.
Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"diff --check" would only detect spaces before tabs if a tab was the
last character in the leading indent. Fix that and add a test case to
make sure the bug doesn't regress in the future.
Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Now that "git diff" handles stdin and relative paths outside the
working tree correctly, we can convert all instances of "diff -u"
to "git diff".
This commit is really the result of
$ perl -pi.bak -e 's/diff -u/git diff/' $(git grep -l "diff -u" t/)
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
(cherry picked from commit c699a40d68215c7e44a5b26117a35c8a56fbd387)
This is _not_ the same as "treat eol as whitespace", since that would mean
that multiple empty lines would be treated as equal to e.g. a space.
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
When whitespace or whitespace change was ignored, the function
xdl_recmatch() returned memcmp() style differences, which is wrong,
since it should return 0 on non-match.
Also, there were three horrible off-by-one bugs, even leading to wrong
hashes in the whitespace special handling.
The issue was noticed by Ray Lehtiniemi.
For good measure, this commit adds a test.
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
