[PATCH v4 3/4] git-p4: retry kill/cleanup operations in tests with timeout

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From: Lars Schneider <larsxschneider@xxxxxxxxx>

In rare cases kill/cleanup operations in tests fail. Retry these
operations with a timeout to make the test less flaky.

Signed-off-by: Lars Schneider <larsxschneider@xxxxxxxxx>
---
 t/lib-git-p4.sh | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/t/lib-git-p4.sh b/t/lib-git-p4.sh
index b1660f6..9043b51 100644
--- a/t/lib-git-p4.sh
+++ b/t/lib-git-p4.sh
@@ -10,6 +10,10 @@ TEST_NO_CREATE_REPO=NoThanks
 # the defined timeout in seconds.
 P4D_TIMEOUT=300
 
+# Some operations require multiple attempts to be successful. Define
+# here the maximal retry timeout in seconds.
+RETRY_TIMEOUT=60
+
 . ./test-lib.sh
 
 if ! test_have_prereq PYTHON
@@ -138,14 +142,24 @@ p4_add_user() {
 	EOF
 }
 
+retry_until_success() {
+    timeout=$(($(date +%s) + $RETRY_TIMEOUT))
+    until "$@" 2>/dev/null || test $(date +%s) -gt $timeout
+    do :
+    done
+}
+
+retry_until_fail() {
+    timeout=$(($(date +%s) + $RETRY_TIMEOUT))
+    until ! "$@" 2>/dev/null || test $(date +%s) -gt $timeout
+    do :
+    done
+}
+
 kill_p4d() {
 	pid=$(cat "$pidfile")
-	# it had better exist for the first kill
-	kill $pid &&
-	for i in 1 2 3 4 5 ; do
-		kill $pid >/dev/null 2>&1 || break
-		sleep 1
-	done &&
+	retry_until_fail kill $pid
+	retry_until_fail kill -9 $pid
 	# complain if it would not die
 	test_must_fail kill $pid >/dev/null 2>&1 &&
 	rm -rf "$db" "$cli" "$pidfile" &&
@@ -153,8 +167,9 @@ kill_p4d() {
 }
 
 cleanup_git() {
-	rm -rf "$git" &&
-	mkdir "$git"
+	retry_until_success rm -r "$git"
+	test_must_fail test -d "$git" &&
+	retry_until_success mkdir "$git"
 }
 
 marshal_dump() {
-- 
2.5.1

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