[PATCH] t4210: detect REG_ILLSEQ dynamically

* [PATCH] t4210: detect REG_ILLSEQ dynamically
@ 2020-05-13 11:16 Carlo Marcelo Arenas Belón
  2020-05-13 15:44 ` Eric Sunshine
                   ` (2 more replies)
  0 siblings, 3 replies; 17+ messages in thread
From: Carlo Marcelo Arenas Belón @ 2020-05-13 11:16 UTC (permalink / raw)
  To: git; +Cc: emaste, Carlo Marcelo Arenas Belón

7187c7bbb8 (t4210: skip i18n tests that don't work on FreeBSD, 2019-11-27)
adds a REG_ILLSEQ prerequisite to avoid failures from the tests added with
4e2443b181 (log tests: test regex backends in "--encode=<enc>" tests,
2019-06-28), but hardcodes it to be only enabled for FreeBSD.

Instead of hardcoding the affected platform, add a test using test-tool to
make sure it can be dynamically detected in other affected systems (like
DragonFlyBSD or macOS), and while at it, enhance the tool so it can report
better on the cause of failure and be silent when needed.

To minimize changes, it is assumed the compilation error is because of the
right type since we control the only caller, and is also assumed to affect
both basic and extended syntax (only extended is tested).  The description
of the first test which wasn't accurate has been also corrected, and the
suppressed tests restricted to the two affected engines only.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
---
 t/helper/test-regex.c | 21 +++++++++++++++++----
 t/t4210-log-i18n.sh   | 24 ++++++++++++++++--------
 t/test-lib.sh         |  6 ------
 3 files changed, 33 insertions(+), 18 deletions(-)

diff --git a/t/helper/test-regex.c b/t/helper/test-regex.c
index 10284cc56f..985fcb0f75 100644
--- a/t/helper/test-regex.c
+++ b/t/helper/test-regex.c
@@ -41,16 +41,21 @@ int cmd__regex(int argc, const char **argv)
 {
 	const char *pat;
 	const char *str;
-	int flags = 0;
+	int ret, opt_s = 0, flags = 0;
 	regex_t r;
 	regmatch_t m[1];
+	char errbuf[64];
 
 	if (argc == 2 && !strcmp(argv[1], "--bug"))
 		return test_regex_bug();
 	else if (argc < 3)
 		usage("test-tool regex --bug\n"
-		      "test-tool regex <pattern> <string> [<options>]");
+		      "test-tool regex [--silent] <pattern> <string> [<options>]");
 
+	if (!strcmp(argv[1], "--silent")) {
+		opt_s++;
+		argv++;
+	}
 	argv++;
 	pat = *argv++;
 	str = *argv++;
@@ -67,8 +72,16 @@ int cmd__regex(int argc, const char **argv)
 	}
 	git_setup_gettext();
 
-	if (regcomp(&r, pat, flags))
-		die("failed regcomp() for pattern '%s'", pat);
+	ret = regcomp(&r, pat, flags);
+	if (ret) {
+		if (opt_s)
+			return 1;
+		else {
+			regerror(ret, &r, errbuf, sizeof(errbuf));
+			die("failed regcomp() for pattern '%s' (%s)",
+				pat, errbuf);
+		}
+	}
 	if (regexec(&r, str, 1, m, 0))
 		return 1;
 
diff --git a/t/t4210-log-i18n.sh b/t/t4210-log-i18n.sh
index c3792081e6..24b9e7e72b 100755
--- a/t/t4210-log-i18n.sh
+++ b/t/t4210-log-i18n.sh
@@ -56,21 +56,29 @@ test_expect_success !MINGW 'log --grep does not find non-reencoded values (latin
 	test_must_be_empty actual
 '
 
+test_have_prereq GETTEXT_LOCALE &&
+! LC_ALL=$is_IS_locale test-tool regex --silent $latin1_e $latin1_e EXTENDED &&
+test_set_prereq REGEX_ILLSEQ
+
 for engine in fixed basic extended perl
 do
+	ireq=
 	prereq=
-	if test $engine = "perl"
-	then
-		prereq="PCRE"
-	else
-		prereq=""
-	fi
+	case $engine in
+	basic|extended)
+		ireq=!REGEX_ILLSEQ,
+		;;
+	perl)
+		prereq=PCRE
+		;;
+	esac
 	force_regex=
 	if test $engine != "fixed"
 	then
 	    force_regex=.*
 	fi
-	test_expect_success !MINGW,!REGEX_ILLSEQ,GETTEXT_LOCALE,$prereq "-c grep.patternType=$engine log --grep does not find non-reencoded values (latin1 + locale)" "
+
+	test_expect_success !MINGW,GETTEXT_LOCALE,$ireq$prereq "-c grep.patternType=$engine log --grep searches in log output encoding (latin1 + locale)" "
 		cat >expect <<-\EOF &&
 		latin1
 		utf8
@@ -84,7 +92,7 @@ do
 		test_must_be_empty actual
 	"
 
-	test_expect_success !MINGW,!REGEX_ILLSEQ,GETTEXT_LOCALE,$prereq "-c grep.patternType=$engine log --grep does not die on invalid UTF-8 value (latin1 + locale + invalid needle)" "
+	test_expect_success !MINGW,GETTEXT_LOCALE,$ireq$prereq "-c grep.patternType=$engine log --grep does not die on invalid UTF-8 value (latin1 + locale + invalid needle)" "
 		LC_ALL=\"$is_IS_locale\" git -c grep.patternType=$engine log --encoding=ISO-8859-1 --format=%s --grep=\"$force_regex$invalid_e\" >actual &&
 		test_must_be_empty actual
 	"
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 0ea1e5a05e..81473fea1d 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -1454,12 +1454,6 @@ case $uname_s in
 	test_set_prereq SED_STRIPS_CR
 	test_set_prereq GREP_STRIPS_CR
 	;;
-FreeBSD)
-	test_set_prereq REGEX_ILLSEQ
-	test_set_prereq POSIXPERM
-	test_set_prereq BSLASHPSPEC
-	test_set_prereq EXECKEEPSPID
-	;;
 *)
 	test_set_prereq POSIXPERM
 	test_set_prereq BSLASHPSPEC
-- 
2.26.2.737.gf3227dd3d3


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