This program moves files form one machine to another

mover.sh

#!/bin/bash

set -eu

#
# This program watches new files and moves them from one machine to another
#
# How it works
#
# mover.sh will recursively watch changes in a directory using inotifywait.
# When the file is closed (after a write), the file is rsynced to the
# destination directory and removed from the local filesystem.
#
# If a directory is created, inotifywait will be restarted so it creates
# watches in the newly created directories.
#
# Since files can be created in a new depp directory hierarchy, we make use of
# rsync's -R flag and 'dotted' path (hence the requirement for rsync 2.6.7).
#
# For instance, if you run:
#
#   mover.sh /tmp/a/ /tmp/b/ user@host
#
# and create a file 'foo' in /tmp/a/x/y/z/, hierarchy '/tmp/b/x/y/z/' might not
# exist on the remote system.
#
# This script takes care of this using the aformentioned options, and will
# execute:
#
# rsync -Ravz --remove-source-files /tmp/a/./x/y/z/foo [email protected]:/tmp/b/
#
# which will take care of 'mkdir -p /tmp/b/x/y/z' before syncing foo.
#

usage() {
  echo -e "Usage: $0 <SRC> <DST> [REMOTE]\n"
  echo -e "\tSRC: absolute path of source to check"
  echo -e "\tDST: absolute path of destination to copy to (on the remote if specified)"
  echo -e "\tREMOTE: remote machine to copy to (in ssh form, e.g. [email protected])"
}

move() {
  local src=$1
  local dst=$2
  local remote=$3

  # if we have a remote, prefix dst with it
  if [ -n "$remote" ]; then
    dst="$remote:$dst"
  fi

  # -R makes use of relative paths
  echo rsync -Ravz --remove-source-files $src $dst
  # Uncomment for real action
  # rsync -Ravz --remove-source-files $src $dst
}

monitor() {
  local src=$1
  local dst=$2
  local remote=$3

  while read res; do
    op=$(echo "$res" | cut -f1 -d' ')
    dir=$(echo "$res" | cut -f2 -d' ')
    file=$(echo "$res" | cut -f3 -d' ')
    pruned=${dir#${src}}

    echo "$res (pruned: ${pruned})"

    case $op in
      *ISDIR)
        echo "directory ${dir} created"
        break
        ;;
      CLOSE_WRITE*)
        echo "$op TRIGGERS => move ${src}./${pruned}${file} ${dst} ${remote}"
        move "${src}./${pruned}${file}" "${dst}" "${remote}"
        ;;
      *)
        echo "nothing to do for $op"
    esac
  done < <(inotifywait -r -m --format '%:e %w %f' -e create,close_write "$src")
}

source=$1
destination=$2
remote=${3:-}

if [ ! -r "$source" ]; then
  echo "ERROR: source $source does not exist"
  exit 1
fi

if [[ "$source" != /* ]]; then
  echo "ERROR: source $source path must be absolute"
  exit 1
fi

if [ ! -r "$destination" ]; then
  echo "ERROR: destination $destination does not exist"
  exit 1
fi

if [[ "$destination" != /* ]]; then
  echo "ERROR: destination $destination path must be absolute"
  exit 1
fi

if [ ! -r "$remote" ]; then
  echo "WARNING: no remote specified; will work locally"
fi

while true; do
    monitor "$source" "$destination" "$remote"
    echo "Directory created, respawning"
done