Restoring files which were bulk copied from a complex folder hierarchy to a flat structure in My Pictures

restore-files.sh

#!/bin/bash

# where the files went missing from
LIBRARY1="/Volumes/Image_Library/Clients"
LIBRARY2='/Volumes/Image_Library/CLIENTNAME'
# where the files ended up
RECOVERED="/Volumes/My Pictures"

# files to output reports to
REPORT_MISSING=report-missing.txt
REPORT_FOUND=report-found.txt

# blow away the old reports
for ii in $REPORT_MISSING $REPORT_FOUND ; do
  if [ -e $ii ] ; then
    rm $ii
  fi
done

# iterate through libraries
for LIBRARY in $LIBRARY1 $LIBRARY2 ; do
  # find all dot-underscore files
  find "$LIBRARY" -name '._*' | while read DOTFILE ; do
    # extrapolate the proper path + filename
    REALFILE=$( echo $DOTFILE | sed -e 's#\._##g' )
    # and just the filename
    FILENAME=$( basename "$REALFILE" )
    # if the proper doesn't exist
    if ! [ -e "$REALFILE" ] ; then
      # don't bother with this file, there are billions
      if [ "$FILENAME" != ".DS_Store" ] ; then
        # if there is a copy in the $RECOVERED dir
        if [ -e "$RECOVERED/$FILENAME" ] ; then
          # copy it back to the desired location
          cp -av "$RECOVERED/$FILENAME" "$REALFILE" >> $REPORT_FOUND 2>&1
        else
          echo "Can't find $RECOVERED/$FILENAME" >> $REPORT_MISSING
        fi
      fi
    fi
  done
done

# tell us how it worked out
if [ -e $REPORT_MISSING ] ; then
  echo "Unable to find the following files"
  cat $REPORT_MISSING
fi