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grep searches for .gitattributes using "name" field in struct
grep_source but that field is not real on-disk path name. For example,
"grep pattern rev" fills the field with "rev:path", and Git looks for
.gitattributes in the (non-existent but exploitable) path "rev:path"
instead of "path".
This patch passes real paths down to grep_source_load_driver() when:
- grep on work tree
- grep on the index
- grep a commit (or a tag if it points to a commit)
so that these cases look up .gitattributes at proper paths.
.gitattributes lookup is disabled in all other cases.
Initial-work-by: Jeff King <peff@peff.net>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There is currently no way for users to tell git-grep that a
particular path is or is not a binary file; instead, grep
always relies on its auto-detection (or the user specifying
"-a" to treat all binary-looking files like text).
This patch teaches git-grep to use the same attribute lookup
that is used by git-diff. We could add a new "grep" flag,
but that is unnecessarily complex and unlikely to be useful.
Despite the name, the "-diff" attribute (or "diff=foo" and
the associated diff.foo.binary config option) are really
about describing the contents of the path. It's simply
historical that diff was the only thing that cared about
these attributes in the past.
And if this simple approach turns out to be insufficient, we
still have a backwards-compatible path forward: we can add a
separate "grep" attribute, and fall back to respecting
"diff" if it is unset.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Benchmarks for the hot cache case:
before:
$ perf stat --repeat=5 git grep qwerty > /dev/null
Performance counter stats for 'git grep qwerty' (5 runs):
3,478,085 cache-misses # 2.322 M/sec ( +- 2.690% )
11,356,177 cache-references # 7.582 M/sec ( +- 2.598% )
3,872,184 branch-misses # 0.363 % ( +- 0.258% )
1,067,367,848 branches # 712.673 M/sec ( +- 2.622% )
3,828,370,782 instructions # 0.947 IPC ( +- 0.033% )
4,043,832,831 cycles # 2700.037 M/sec ( +- 0.167% )
8,518 page-faults # 0.006 M/sec ( +- 3.648% )
847 CPU-migrations # 0.001 M/sec ( +- 3.262% )
6,546 context-switches # 0.004 M/sec ( +- 2.292% )
1497.695495 task-clock-msecs # 3.303 CPUs ( +- 2.550% )
0.453394396 seconds time elapsed ( +- 0.912% )
after:
$ perf stat --repeat=5 git grep qwerty > /dev/null
Performance counter stats for 'git grep qwerty' (5 runs):
2,989,918 cache-misses # 3.166 M/sec ( +- 5.013% )
10,986,041 cache-references # 11.633 M/sec ( +- 4.899% ) (scaled from 95.06%)
3,511,993 branch-misses # 1.422 % ( +- 0.785% )
246,893,561 branches # 261.433 M/sec ( +- 3.967% )
1,392,727,757 instructions # 0.564 IPC ( +- 0.040% )
2,468,142,397 cycles # 2613.494 M/sec ( +- 0.110% )
7,747 page-faults # 0.008 M/sec ( +- 3.995% )
897 CPU-migrations # 0.001 M/sec ( +- 2.383% )
6,535 context-switches # 0.007 M/sec ( +- 1.993% )
944.384228 task-clock-msecs # 3.177 CPUs ( +- 0.268% )
0.297257643 seconds time elapsed ( +- 0.450% )
So we gain about 35% by using the kwset code.
As a side effect of using kwset two grep tests are fixed by this
patch. The first is fixed because kwset can deal with case-insensitive
search containing NULs, something strcasestr cannot do. The second one
is fixed because we consider patterns containing NULs as fixed strings
(regcomp cannot accept patterns with NULs).
Signed-off-by: Fredrik Kuivinen <frekui@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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On IRIX 6.5, the printf utility in /usr/bin does not appear to handle the
\ddd notation according to POSIX. This printf appears to halt processing
of the string argument and ignore any additional characters in the string.
Work around this flaw by replacing the \000's with 'Q' and using the
q_to_nul helper function provided by test-lib.sh
This problem with printf is not apparent when using the Bash shell since
Bash implements a POSIX compatible printf function internally.
Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Now that we have a regex engine that supports REG_STARTEND this test
should fail if "git grep" can't grep NULL characters.
Platforms that don't have a POSIX regex engine which supports
REG_STARTEND should always define NO_REGEX=YesPlease when compiling.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Search patterns in a file specified with -f can contain NUL characters.
The current code ignores all characters on a line after a NUL.
Pass the actual length of the line all the way from the pattern file to
fixmatch() and use it for case-sensitive fixed string matching.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Refactor REG_STARTEND handling inlook_ahead() into a new helper,
regmatch(), and use it for line matching, too. This allows regex
matching beyond NUL characters if regexec() supports the flag. NUL
characters themselves are not matched in any way, though.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Functions for C strings, like strcasestr(), can't see beyond NUL
characters. Check if there is such an obstacle on the line and try
again behind it.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Allow searching beyond NUL characters by using memmem() instead of
strstr().
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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As with the option -c/--count, git grep with the option -l/--name-only
should work the same with binary files as with text files because
there is no danger of messing up the terminal with control characters
from the contents of matching files. GNU grep does the same.
Move the check for ->name_only before the one for binary_match_only,
thus making the latter irrelevant for git grep -l.
Reported-by: Dmitry Potapov <dpotapov@gmail.com>
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The intent of showing the message "Binary file xyz matches" for
binary files is to avoid annoying users by potentially messing up
their terminals by printing control characters. In --count mode,
this precaution isn't necessary.
Display counts of matches if -c/--count was specified, even if -a
was not given. GNU grep does the same.
Moving the check for ->count before the code for handling binary
file also avoids printing context lines if --count and -[ABC] were
used together, so we can remove the part of the comment that
mentions this behaviour. Again, GNU grep does the same.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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