Mail Archives: cygwin/2021/08/15/12:15:05
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| From: | Cygwin grep Co-Maintainer <Brian DOT Inglis AT SystematicSW DOT ab DOT ca>
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| To: | cygwin AT cygwin DOT com
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| Date: | Sun, 15 Aug 2021 10:12:46 -0600
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| Message-Id: | <announce.20210815101246.34436-1-Brian.Inglis@SystematicSW.ab.ca>
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| Subject: | [ANNOUNCEMENT] Test: grep 3.7 (TEST)
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--===============0973966080906514688==
Content-Type: text/plain
The following test packages have been uploaded to the Cygwin distribution:
* grep 3.7
GNU grep searches one or more input files for lines containing a match
to a specified pattern. By default, grep outputs the matching lines. The
GNU implementation includes several useful extensions over POSIX.
Please test this Base category utility as extensively as possible
(especially if you are a Cygwin package maintainer) as this package is
used in all installations and has not been upgraded for a few years.
I have it locally installed so it is getting used by commands, scripts,
cron jobs, and cygport builds, and has and is getting frequent exercise
with no apparent issues so far.
If no issues are reported within a couple of weeks the package will be
upgraded to current.
For more information see the project home pages:
https://www.gnu.org/software/grep/
https://sv.gnu.org/projects/grep/
For changes since the previous Cygwin release please see below or read
/usr/share/doc/grep/NEWS after installation; for complete details see:
/usr/share/doc/grep/ChangeLog
https://git.sv.gnu.org/gitweb/?p=grep.git;a=log;h=refs/tags/v3.6
Noteworthy changes in release 3.7 (2021-08-14) [stable]
* Changes in behavior
Use of the --unix-byte-offsets (-u) option now evokes a warning.
Since 3.1, this Windows-only option has had no effect.
* Bug fixes
Preprocessing N patterns would take at least O(N^2) time when too many
patterns hashed to too few buckets. This now takes seconds, not days:
: | grep -Ff <(seq 6400000 | tr 0-9 A-J)
[Bug#44754 introduced in grep 3.5]
Noteworthy changes in release 3.6 (2020-11-08) [stable]
* Changes in behavior
The GREP_OPTIONS environment variable no longer affects grep's behavior.
The variable was declared obsolescent in grep 2.21 (2014), and since
then any use had caused grep to issue a diagnostic.
* Bug fixes
grep's DFA matcher performed an invalid regex transformation
that would convert an ERE like a+a+a+ to a+a+, which would make
grep a+a+a+ mistakenly match "aa".
[Bug#44351 introduced in grep 3.2]
grep -P now reports the troublesome input filename upon PCRE execution
failure. Before, searching many files for something rare might fail with
just "exceeded PCRE's backtracking limit". Now, it also reports which file
triggered the failure.
Noteworthy changes in release 3.5 (2020-09-27) [stable]
* Changes in behavior
The message that a binary file matches is now sent to standard error
and the message has been reworded from "Binary file FOO matches" to
"grep: FOO: binary file matches", to avoid confusion with ordinary
output or when file names contain spaces and the like, and to be
more consistent with other diagnostics. For example, commands
like 'grep PATTERN FILE | wc' no longer add 1 to the count of
matching text lines due to the presence of the message. Like other
stderr messages, the message is now omitted if the --no-messages
(-s) option is given.
Two other stderr messages now use the typical form too. They are
now "grep: FOO: warning: recursive directory loop" and "grep: FOO:
input file is also the output".
The --files-without-match (-L) option has reverted to its behavior
in grep 3.1 and earlier. That is, grep -L again succeeds when a
line is selected, not when a file is listed. The behavior in grep
3.2 through 3.4 was causing compatibility problems.
* Bug fixes
grep -I no longer issues a spurious "Binary file FOO matches" line.
[Bug#33552 introduced in grep 2.23]
In UTF-8 locales, grep -w no longer ignores a multibyte word
constituent just before what would otherwise be a word match.
[Bug#43225 introduced in grep 2.28]
grep -i no longer mishandles ASCII characters that match multibyte
characters. For example, 'LC_ALL=tr_TR.utf8 grep -i i' no longer
dumps core merely because 'i' matches 'Ä°' (U+0130 LATIN CAPITAL
LETTER I WITH DOT ABOVE) in Turkish when ignoring case.
[Bug#43577 introduced partly in grep 2.28 and partly in grep 3.4]
A performance regression with -E and many patterns has been mostly fixed.
"Mostly" as there is a performance tradeoff between Bug#22357 and Bug#40634.
[Bug#40634 introduced in grep 2.28]
A performance regression with many duplicate patterns has been fixed.
[Bug#43040 introduced in grep 3.4]
An N^2 RSS performance regression with many patterns has been fixed
in common cases (no backref, and no use of -o or --color).
With only 80,000 lines of /usr/share/dict/linux.words, the following
would use 100GB of RSS and take 3 minutes. With the fix, it used less
than 400MB and took less than one second:
head -80000 /usr/share/dict/linux.words > w; grep -vf w w
[Bug#43527 introduced in grep 3.4]
* Build-related
"make dist" builds .tar.gz files again, as they are still used in
some barebones builds.
Noteworthy changes in release 3.4 (2020-01-02) [stable]
* New features
The new --no-ignore-case option causes grep to observe case
distinctions, overriding any previous -i (--ignore-case) option.
* Bug fixes
'.' no longer matches some invalid byte sequences in UTF-8 locales.
[bug introduced in grep 2.7]
grep -Fw can no longer false match in non-UTF-8 multibyte locales
For example, this command would erroneously print its input line:
echo ab | LC_CTYPE=ja_JP.eucjp grep -Fw b
[Bug#38223 introduced in grep 2.28]
The exit status of 'grep -L' is no longer incorrect when standard
output is /dev/null.
[Bug#37716 introduced in grep 3.2]
A performance bug has been fixed when grep is given many patterns,
each with no back-reference.
[Bug#33249 introduced in grep 2.5]
A performance bug has been fixed for patterns like '01.2' that
cause grep to reorder tokens internally.
[Bug#34951 introduced in grep 3.2]
* Build-related
The build procedure no longer relies on any already-built src/grep
that might be absent or broken. Instead, it uses the system 'grep'
to bootstrap, and uses src/grep only to test the build. On Solaris
/usr/bin/grep is broken, but you can install GNU or XPG4 'grep' from
the standard Solaris distribution before building GNU Grep yourself.
[bug introduced in grep 2.8]
Noteworthy changes in release 3.3 (2018-12-20) [stable]
* Bug fixes
Some uses of \b in the C locale and with the DFA matcher would fail, e.g.,
the following would print nothing (it should print the input line):
echo 123-x|LC_ALL=C grep '.\bx'
Using a multibyte locale, using certain regexp constructs (some ranges,
back-references), or forcing use of the PCRE matcher via --perl-regexp (-P)
would avoid the bug.
[bug introduced in grep 3.2]
Noteworthy changes in release 3.2 (2018-12-20) [stable]
* Changes in behavior
The --files-without-match (-L) option now causes grep to succeed
when a file is listed, instead of when a line is selected. This
resembles what git-grep does.
* Bug fixes
The --recursive (-r) option no longer fails on MS-Windows.
[bug introduced in grep 2.11]
* Improvements
An over-30x performance improvement when many 'or'd expressions
share a common prefix, thanks to improvements in gnulib's dfa.c,
by Norihiro Tanaka. See gnulib commits v0.1-2110-ge648401be,
v0.1-2111-g4299106ce, v0.1-2117-g617a60974
An additional 3-23% speed-up when searching large files, via
increased initial buffer size.
grep now diagnoses stack overflow. Before grep-2.6, the included
regexp code would detect it. Since 2.6, grep defaulted to using
glibc's regexp, which lost that capability.
Noteworthy changes in release 3.1 (2017-07-02) [stable]
* Improvements
grep '[0-9]' is now just as fast as grep '[[:digit:]]' when run
in a multi-byte locale. Before, it was several times slower.
* Changes in behavior
Context no longer excludes selected lines omitted because of -m.
For example, 'grep "^" -m1 -A1' now outputs the first two input
lines, not just the first line. This fixes a glitch that has been
present since -m was added in grep 2.5.
The following changes affect only MS-Windows platforms. First, the
--binary (-U) option now governs whether binary I/O is used, instead
of a heuristic that was sometimes incorrect. Second, the
--unix-byte-offsets (-u) option now has no effect on MS-Windows too.
--===============0973966080906514688==
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