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grep/pcre2: fix an edge case concerning ascii patterns and UTF-8 data 

If we attempt to grep non-ascii log message text with an ascii pattern, we
run into the following issue:

    $ git log --color --author='.var.*Bjar' -1 origin/master | grep ^Author
    grep: (standard input): binary file matches

So, to fix this teach the grep code to use PCRE2_UTF, as long as the log
output is encoded in UTF-8.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Hamza Mahfooz 2021-10-15 12:13:56 -04:00 committed by Junio C Hamano
parent 6a5c337922
commit ae39ba431a
2 changed files with 52 additions and 2 deletions
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6
grep.c
View File

@ -382,8 +382,10 @@ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt
}
options |= PCRE2_CASELESS;
}
if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern) &&
!(!opt->ignore_case && (p->fixed || p->is_fixed)))
if ((!opt->ignore_locale && !has_non_ascii(p->pattern)) ||
(!opt->ignore_locale && is_utf8_locale() &&
has_non_ascii(p->pattern) && !(!opt->ignore_case &&
(p->fixed || p->is_fixed))))
options |= (PCRE2_UTF | PCRE2_MATCH_INVALID_UTF);

#ifdef GIT_PCRE2_VERSION_10_36_OR_HIGHER

48
t/t7812-grep-icase-non-ascii.sh
View File

@ -53,6 +53,54 @@ test_expect_success REGEX_LOCALE 'pickaxe -i on non-ascii' '
test_cmp expected actual
'

test_expect_success GETTEXT_LOCALE,PCRE 'log --author with an ascii pattern on UTF-8 data' '
cat >expected <<-\EOF &&
Author: <BOLD;RED>À Ú Thor<RESET> <author@example.com>
EOF
test_write_lines "forth" >file4 &&
git add file4 &&
git commit --author="À Ú Thor <author@example.com>" -m sécond &&
git log -1 --color=always --perl-regexp --author=".*Thor" >log &&
grep Author log >actual.raw &&
test_decode_color <actual.raw >actual &&
test_cmp expected actual
'

test_expect_success GETTEXT_LOCALE,PCRE 'log --committer with an ascii pattern on ISO-8859-1 data' '
cat >expected <<-\EOF &&
Commit: Ç<BOLD;RED> O Mîtter <committer@example.com><RESET>
EOF
test_write_lines "fifth" >file5 &&
git add file5 &&
GIT_COMMITTER_NAME="Ç O Mîtter" &&
GIT_COMMITTER_EMAIL="committer@example.com" &&
git -c i18n.commitEncoding=latin1 commit -m thïrd &&
git -c i18n.logOutputEncoding=latin1 log -1 --pretty=fuller --color=always --perl-regexp --committer=" O.*" >log &&
grep Commit: log >actual.raw &&
test_decode_color <actual.raw >actual &&
test_cmp expected actual
'

test_expect_success GETTEXT_LOCALE,PCRE 'log --grep with an ascii pattern on UTF-8 data' '
cat >expected <<-\EOF &&
sé<BOLD;RED>con<RESET>d
EOF
git log -1 --color=always --perl-regexp --grep="con" >log &&
grep con log >actual.raw &&
test_decode_color <actual.raw >actual &&
test_cmp expected actual
'

test_expect_success GETTEXT_LOCALE,PCRE 'log --grep with an ascii pattern on ISO-8859-1 data' '
cat >expected <<-\EOF &&
<BOLD;RED>thïrd<RESET>
EOF
git -c i18n.logOutputEncoding=latin1 log -1 --color=always --perl-regexp --grep="th.*rd" >log &&
grep "th.*rd" log >actual.raw &&
test_decode_color <actual.raw >actual &&
test_cmp expected actual
'

test_expect_success GETTEXT_LOCALE,LIBPCRE2 'PCRE v2: setup invalid UTF-8 data' '
printf "\\200\\n" >invalid-0x80 &&
echo "ævar" >expected &&