Change the container to be a general inotify container.

monitor.sh

@@ -0,0 +1,133 @@
+#!/bin/bash
+
+CONFIG_FILE=$1
+NAME=$(basename $CONFIG_FILE .conf)
+
+function ts {
+  echo [`date '+%b %d %X' $NAME: `]
+}
+
+echo "$(ts) Starting monitor for $CONFIG_FILE"
+
+tr -d '\r' < $CONFIG_FILE > /tmp/$NAME.conf
+
+. /tmp/$NAME.conf
+
+if [[ ! -d "$WATCH_DIR" ]]; then
+  echo "$(ts) WATCH_DIR specified in $CONFIG_FILE must be a directory."
+  exit 1
+fi
+
+if [[ ! "$SETTLE_DURATION" =~ ^([0-9]{1,2}:){0,2}[0-9]{1,2}$ ]]; then
+  echo "$(ts) SETTLE_DURATION must be defined in $CONFIG_FILE as HH:MM:SS or MM:SS or SS."
+  exit 1
+fi
+
+if [[ ! "$MAX_WAIT_TIME" =~ ^([0-9]{1,2}:){0,2}[0-9]{1,2}$ ]]; then
+  echo "$(ts) MAX_WAIT_TIME must be defined in $CONFIG_FILE as HH:MM:SS or MM:SS or SS."
+  exit 1
+fi
+
+if [[ ! "$MIN_PERIOD" =~ ^([0-9]{1,2}:){0,2}[0-9]{1,2}$ ]]; then
+  echo "$(ts) MIN_PERIOD must be defined in $CONFIG_FILE as HH:MM:SS or MM:SS or SS."
+  exit 1
+fi
+
+if [ -z "$COMMAND" ]; then
+  echo "$(ts) COMMAND must be defined in $CONFIG_FILE"
+  exit 1
+fi
+
+to_seconds () {
+  readarray elements < <(echo $1 | sed 's/:/\n/g' | tac)
+
+  SECONDS=0
+  POWER=1
+
+  for (( i=0 ; i<${#elements[@]}; i++ )) ; do
+    SECONDS=$(( 10#$SECONDS + 10#${elements[i]} * 10#$POWER ))
+    POWER=$(( 10#$POWER * 60 ))
+  done
+
+  echo "$SECONDS"
+}
+
+SETTLE_DURATION=$(to_seconds $SETTLE_DURATION)
+MAX_WAIT_TIME=$(to_seconds $MAX_WAIT_TIME)
+MIN_PERIOD=$(to_seconds $MIN_PERIOD)
+
+pipe=$(mktemp -u)
+mkfifo $pipe
+
+echo "$(ts) Waiting for changes..."
+inotifywait -m -q --format '%e %f' /media >$pipe &
+
+last_run_time=0
+
+while true
+do
+  if read RECORD
+  then
+    EVENT=$(echo "$RECORD" | cut -d' ' -f 1)
+    FILE=$(echo "$RECORD" | cut -d' ' -f 2-)
+
+#    echo "$RECORD"
+#    echo "  EVENT=$EVENT"
+#    echo "  FILE=$FILE"
+
+    if [ "$EVENT" == "CREATE,ISDIR" ]
+    then
+      echo "$(ts) Detected new directory: $FILE"
+    elif [ "$EVENT" == "CLOSE_WRITE,CLOSE" ]
+    then
+      echo "$(ts) Detected new file: $FILE"
+    elif [ "$EVENT" == "MOVED_TO" ]
+    then
+      echo "$(ts) Detected moved file: $FILE"
+    else
+      continue
+    fi
+
+    # Monster up as many events as possible, until we hit the either the settle duration, or the max wait threshold.
+    start_time=$(date +"%s")
+
+    while true
+    do
+      if read -t $SETTLE_DURATION RECORD
+      then
+        end_time=$(date +"%s")
+
+        if [ $(($end_time-$start_time)) -gt $MAX_WAIT_TIME ]
+        then
+          echo "$(ts) Input directory didn't stabilize after $MAX_WAIT_TIME seconds. Triggering command anyway."
+          break
+        fi
+      else
+        echo "$(ts) Input directory stabilized for $SETTLE_DURATION seconds. Triggering command."
+        break
+      fi
+    done
+
+    time_since_last_run=$(($(date +"%s")-$last_run_time))
+    if [ $time_since_last_run -lt $MIN_PERIOD ]
+    then
+      remaining_time=$(($MIN_PERIOD-$time_since_last_run))
+
+      echo "$(ts) Waiting an additional $remaining_time seconds before running command"
+    fi
+
+    # Process events while we wait for $MIN_PERIOD to expire
+    while [ $time_since_last_run -lt $MIN_PERIOD ]
+    do
+      remaining_time=$(($MIN_PERIOD-$time_since_last_run))
+
+      read -t $remaining_time RECORD
+
+      time_since_last_run=$(($(date +"%s")-$last_run_time))
+    done
+
+    echo "$(ts) Running command"
+    $COMMAND
+    last_run_time=$(date +"%s")
+  fi
+done <$pipe