.travis.yml: Prevent nightly jobs from timing out (again) (#7238)

* .travis.yml: Add tick() and retry() functions

* .travis.yml: Remove superfluous 'docker info' commands

The docker info command is ran during the install phase. There is no
need to run it again

* .travis.yml: Use the tick() function instead of travis_wait()

1 files changed, 27 insertions, 0 deletions

diff --git a/.travis/utils.sh b/.travis/utils.sh
new file mode 100644
index 0000000000..58ce47f0ae
--- /dev/null
+++ b/.travis/utils.sh
@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# Prevent travis from timing out after 10 minutes of no output
+tick() {
+	(while true; do sleep 300; echo; done) &
+	local PID=$!
+	disown
+
+	"$@"
+	local RET=$?
+
+	kill $PID
+	return $RET
+}
+
+retry() {
+	local tries=$1
+	shift
+
+	local i=0
+	while [ "$i" -lt "$tries" ]; do
+		"$@" && return 0
+		sleep $((2**((i++))))
+	done
+
+	return 1
+}