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-rw-r--r--taskcluster/docker/recipes/xvfb.sh75
1 files changed, 75 insertions, 0 deletions
diff --git a/taskcluster/docker/recipes/xvfb.sh b/taskcluster/docker/recipes/xvfb.sh
new file mode 100644
index 0000000000..6e0e79f7d4
--- /dev/null
+++ b/taskcluster/docker/recipes/xvfb.sh
@@ -0,0 +1,75 @@
+#! /bin/bash -x
+
+set -x
+
+fail() {
+ echo # make sure error message is on a new line
+ echo "[xvfb.sh:error]" "${@}"
+ exit 1
+}
+
+cleanup_xvfb() {
+ # When you call this script with START_VNC or TASKCLUSTER_INTERACTIVE
+ # we make sure we do not kill xvfb so you do not lose your connection
+ local xvfb_pid=`pidof Xvfb`
+ local vnc=${START_VNC:-false}
+ local interactive=${TASKCLUSTER_INTERACTIVE:-false}
+ if [ -n "$xvfb_pid" ] && [[ $vnc == false ]] && [[ $interactive == false ]] ; then
+ kill $xvfb_pid || true
+ screen -XS xvfb quit || true
+ fi
+}
+
+# Attempt to start xvfb in a screen session with the given resolution and display
+# number. Up to 5 attempts will be made to start xvfb with a short delay
+# between retries
+try_xvfb() {
+ screen -dmS xvfb Xvfb :$2 -nolisten tcp -screen 0 $1 \
+ > ~/artifacts/xvfb/xvfb.log 2>&1
+ export DISPLAY=:$2
+
+ # Only error code 255 matters, because it signifies that no
+ # display could be opened. As long as we can open the display
+ # tests should work. We'll retry a few times with a sleep before
+ # failing.
+ local retry_count=0
+ local max_retries=5
+ xvfb_test=0
+ until [ $retry_count -gt $max_retries ]; do
+ xvinfo || xvfb_test=$?
+ if [ $xvfb_test != 255 ]; then
+ retry_count=$(($max_retries + 1))
+ else
+ retry_count=$(($retry_count + 1))
+ echo "Failed to start Xvfb, retry: $retry_count"
+ sleep 2
+ fi
+ done
+ if [ $xvfb_test == 255 ]; then
+ return 1
+ else
+ return 0
+ fi
+}
+
+start_xvfb() {
+ set +e
+ mkdir -p ~/artifacts/xvfb
+ local retry_count=0
+ local max_retries=2
+ local success=1
+ until [ $retry_count -gt $max_retries ]; do
+ try_xvfb $1 $2
+ success=$?
+ if [ $success -eq 0 ]; then
+ retry_count=$(($max_retries + 1))
+ else
+ retry_count=$(($retry_count + 1))
+ sleep 10
+ fi
+ done
+ set -e
+ if [ $success -eq 1 ]; then
+ fail "Could not start xvfb after ${max_retries} attempts"
+ fi
+}