From ed60d6666bf3f4d7506cda1c38757e16f70d0184 Mon Sep 17 00:00:00 2001
From: Nicolas MASSE <nicolas.masse@itix.fr>
Date: Fri, 7 Jan 2022 12:56:55 +0100
Subject: [PATCH] initial commit

---
 retries/retries.sh | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100755 retries/retries.sh

diff --git a/retries/retries.sh b/retries/retries.sh
new file mode 100755
index 0000000..9f5043a
--- /dev/null
+++ b/retries/retries.sh
@@ -0,0 +1,52 @@
+#!/bin/bash
+
+function retry () {
+    local i=5 delay=1
+    while [ $i -gt 0 ]; do
+	i="$((i-1))"
+
+	# save shell flags to restore them later
+	bash_flags="$-"
+        
+	# execute the given command
+	set +e
+        "$@"
+        ret=$?
+	
+	# restore flags since we modified them above
+	if [[ "$bash_flags" == *e* ]]; then
+          set -e
+	fi
+
+        if [ $ret -gt 0 ]; then
+            echo "$1 failed. Retrying in $delay seconds..."
+            sleep $delay
+            continue
+        else
+            return 0
+        fi
+    done
+
+    echo "Giving up..."
+    return 1
+}
+
+function fail () {
+    echo "$@"
+    exit 255
+}
+
+echo "Testcase: false"
+retry false
+[ $? -gt 0 ] || fail "assert failed"
+
+echo
+echo "Testcase: true"
+retry true
+[ $? -eq 0 ] || fail "assert failed"
+
+echo
+echo "Testcase: random"
+retry /bin/sh -c 'echo random; [ $RANDOM -lt 6000 ]'
+
+