inotifydo

#!/usr/bin/env bash
# credit: chrstphr

# initialize the last time we synced (seconds since 1970-01-01)
last_synced_time=0
inotifywait --exclude '.git' -mrq -e modify -e create -e delete --timefmt '%s' --format '%T %e:%w%f' $2 | while read timestamp event; do
    echo Event: "$event"
    echo Timestamp: "$timestamp"
    # Give the file system time to properly handle the file changes that occurred
    sleep 0.2

    # if the timestamp is more than 10 seconds ago, we're not syncing it. We don't sync because this means that the server is extremely slow to respond and we need to clear the event queue.
    current_time="$(date +%s)"
    if [ $(("$current_time" - "$timestamp")) -gt 10 ]; then
      echo "Ignoring event because it happened far in the past"
      continue
    fi

    # only if the last update is more than 1 second ago do we want to handle this event
    if [ $(("$timestamp" - "$last_synced_time")) -gt 1 ]; then
        last_synced_time="$timestamp"
        echo Calling git_upd
        "$@" 2>&1 | awk '{print " ",$0}'
        echo Finished syncing at "$(date)"
    else
        echo Event skipped because it occurred less than the wait time after the previous handled event
    fi;
done;