nextjob_is_free.sh

#!/bin/bash
#set +x
set +x -e
which jq || { 
echo jq not found ; exit 9 
}
which curl || { 
echo curl not found ; exit 9 
}

selfabort () {
	echo self $BUILD_URL terminate.
	curl -X POST -qs $BUILD_URL/stop
	exit 9
}

NEXTBASE=$( curl -qs "${JOB_URL}api/json" | jq -c -r .downstreamProjects[0].url )

echo next $NEXTBASE found.

COUNT=0
while :
do
	MUSTNULL=$( curl -qs ${NEXTBASE}api/json | jq -c -r .queueItem )
	if [ "x$MUSTNULL" \!= "xnull" ]
	then
		echo $NEXTBASE has queue
		selfabort
		exit 1
	fi
	NEWESTJOB=$( curl -qs ${NEXTBASE}api/json | jq -c -r .lastBuild.url )
	IS_BUILDING=$( curl -qs $NEWESTJOB/api/json | jq -c -r ".building" )
	if [ $IS_BUILDING == true ]
	then
		echo next $NEXTBASE is building on $NEWESTJOB
		selfabort
		exit 1
	fi
	COUNT=$(( $COUNT + 1 ))
	if [ $COUNT -gt 1 ]
	then
		break
	fi
	echo next $NEXTBASE is empty , but wait $COUNT
	sleep 5
	echo retry...
done
exit 0