[PATCH -v2] report: add support for the xunit-quiet format

["Theodore Ts'o" <tytso@mit.edu>]

The xunit-quiet format exludes the NNN.{full,dmesg,bad} files in
<system-out> and <system-err> nodes.

For test runners that save the entire results directory to preserve
all of the test artifacts, capturing the NNN.{full,dmesg,bad} in the
results.xml file is redundant.  In addition, if the NNN.bad is too
large, it can cause the junitparser python library to refuse to parse
the XML file to prevent potential denial of service attacks[1].  A
simple way to avoid this problem is to simply to omit the <system-out>
and <system-err> nodes in the results.xml file.

[1] https://gitlab.com/gitlab-org/gitlab/-/issues/268035

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: David Disseldorp <ddiss@suse.de>
---
 check         |  2 +-
 common/report | 21 ++++++++++++++-------
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/check b/check
index 27ebb0c2..d4d436c0 100755
--- a/check
+++ b/check
@@ -75,7 +75,7 @@ check options
     -I <n>		iterate the test list <n> times, but stops iterating further in case of any test failure
     -d			dump test output to stdout
     -b			brief test summary
-    -R fmt[,fmt]	generate report in formats specified. Supported format: [xunit]
+    -R fmt[,fmt]	generate report in formats specified. Supported formats: xunit, xunit-quiet
     --large-fs		optimise scratch device for large filesystems
     -s section		run only specified section from config file
     -S section		exclude the specified section from the config file
diff --git a/common/report b/common/report
index 5ca41bc4..64f9c866 100644
--- a/common/report
+++ b/common/report
@@ -71,11 +71,16 @@ _xunit_make_testcase_report()
 	local test_name="$2"
 	local test_status="$3"
 	local test_time="$4"
+	local report_format="$5"
+	local quiet
+
+	if [ "$report_format" = xunit-quiet ]; then
+		quiet=yes
+	fi
 
 	# TODO: other places may also win if no-section mode will be named like 'default/global'
 	if [ $sect_name == '-no-sections-' ]; then
 		sect_name='global'
-
 	fi
 	local report=$tmp.report.xunit.$sect_name.xml
 
@@ -104,14 +109,16 @@ _xunit_make_testcase_report()
 			_err_msg="Test $test_name failed, reason unknown"
 		fi
 		echo -e "\t\t<failure message=\"$_err_msg\" type=\"TestFail\" />" >> $report
-		if [ -s "$full_file" ]; then
+		if [ -z "$quiet" -a -s "$full_file" ]; then
 			echo -e "\t\t<system-out>" >> $report
 			printf	'<![CDATA[\n' >>$report
 			cat "$full_file" | tr -dc '[:print:][:space:]' | encode_xml >>$report
 			printf ']]>\n'	>>$report
 			echo -e "\t\t</system-out>" >> $report
 		fi
-		if [ -f "$dmesg_file" ]; then
+		if [ -n "$quiet" ]; then
+		   :
+		elif [ -f "$dmesg_file" ]; then
 			echo -e "\t\t<system-err>" >> $report
 			printf	'<![CDATA[\n' >>$report
 			cat "$dmesg_file" | tr -dc '[:print:][:space:]' | encode_xml >>$report
@@ -144,7 +151,7 @@ _make_section_report()
 	local sect_time="$5"
 	for report in $REPORT_LIST; do
 		case "$report" in
-		"xunit")
+		"xunit"|"xunit-quiet")
 			_xunit_make_section_report "$sect_name" "$tests_count" \
 						   "$bad_count" "$notrun_count" \
 						   "$sect_time"
@@ -164,9 +171,9 @@ _make_testcase_report()
 	local test_time="$4"
 	for report in $REPORT_LIST; do
 		case "$report" in
-		"xunit")
+		"xunit"|"xunit-quiet")
 			_xunit_make_testcase_report "$sect_name" "$test_seq" \
-						    "$test_status" "$test_time"
+						    "$test_status" "$test_time" "$report"
 			;;
 		*)
 			_dump_err "report format '$report' is not supported"
@@ -178,7 +185,7 @@ _make_testcase_report()
 _assert_report_list() {
 	for report in $REPORT_LIST; do
 		case "$report" in
-		"xunit")
+		"xunit"|"xunit-quiet")
 			;;
 		*)
 			_fatal "report format '$report' is not supported"
-- 
2.31.0