The inotifywait command 

~$ inotifywait --monitor ${WATCH_DIR}
Setting up watches.
Watches established.
/home/grant/bucket/ OPEN,ISDIR
/home/grant/bucket/ OPEN,ISDIR
/home/grant/bucket/ ACCESS,ISDIR
/home/grant/bucket/ ACCESS,ISDIR
/home/grant/bucket/ ACCESS,ISDIR
/home/grant/bucket/ ACCESS,ISDIR
/home/grant/bucket/ OPEN Changes since 2017-07-24.html
/home/grant/bucket/ ACCESS Changes since 2017-07-24.html
/home/grant/bucket/ CLOSE_NOWRITE,CLOSE Changes since 2017-07-24.html
/home/grant/bucket/ ACCESS,ISDIR
/home/grant/bucket/ CLOSE_NOWRITE,CLOSE,ISDIR
/home/grant/bucket/ CLOSE_NOWRITE,CLOSE,ISDIR
/home/grant/bucket/ OPEN Changes since 2017-07-24.html
/home/grant/bucket/ ACCESS Changes since 2017-07-24.html
/home/grant/bucket/ CLOSE_NOWRITE,CLOSE Changes since 2017-07-24.html
/home/grant/bucket/ OPEN,ISDIR
/home/grant/bucket/ ACCESS,ISDIR
/home/grant/bucket/ ACCESS,ISDIR
/home/grant/bucket/ CLOSE_NOWRITE,CLOSE,ISDIR
/home/grant/bucket/ CREATE staging-changelog.html
/home/grant/bucket/ OPEN staging-changelog.html
/home/grant/bucket/ MODIFY staging-changelog.html
... 92 more times
/home/grant/bucket/ MODIFY staging-changelog.html
/home/grant/bucket/ CLOSE_WRITE,CLOSE staging-changelog.html
/home/grant/bucket/ OPEN staging-changelog.html
/home/grant/bucket/ ACCESS staging-changelog.html
/home/grant/bucket/ CLOSE_NOWRITE,CLOSE staging-changelog.html
/home/grant/bucket/ OPEN staging-changelog.html
/home/grant/bucket/ ACCESS staging-changelog.html
... 23 more times
/home/grant/bucket/ ACCESS staging-changelog.html
/home/grant/bucket/ CLOSE_NOWRITE,CLOSE staging-changelog.html