Renaming strategy for cautious renamers

Cautiously RENAME a comma delim list of files.txt

#################################
###
### Cautiously RENAME a comma delim list of files
###
#################################

### ASSIGN variable to input file
thisKey="Key_Renaming_26Aug2016_hb2.txt" 

### All functions require a file containing renaming information
## The input file should be a plain text file containing a full source path and file name location followed by a comma and the full destination path and file name
# example line from input file:
# /home/bonzo/oldFileName.txt,/home/ballet/dogs/newFileName.txt

# note: new directories are not created

## Gotchas to look out for
# Any line that does not contain a file source and destination must start with a pound symbol (#). 
# If you are exporting from excel, try "export csv (windows)" instead of MS-DOS. Exporting as CSV MS-DOS can generate line breaks incompatible with linux. If nothing happens when you run the command, it can be because the content is viewed as a single line.
# If you are exporting from excel, make sure there is no content in cells beneath the current lines. Excel likes to export extra lines.

#################################
###
### STEP 1: check that source files exist
###
#################################
#
# Requires: 
#  variable "$thisKey" containing the name of file describing the files to be renamed
#
# Returns:
# text file named *.sourceExistenceTestResults.txt indicating whether each source file is absent or found
# 
# Purpose: 
# Review the output to make sure that source files have been correctly specified

cat $thisKey | grep -v ^# | while read LINE
do oldName=${LINE/,*}
if [ ! -f  $oldName ] 
then echo "absent: " $oldName
else echo "found: " $oldName 
fi 
done > ${thisKey}.sourceExistenceTestResults.txt

#################################
###
### FUNCTION: check whether destination files ALREADY exist
###
#################################
#
# Input: 
# set variable with name of file containing renaming contents
#
# Returns:
# text file named *.destinationExistenceTestResults.txt indicating whether each source file is absent or found
# 
# Purpose: 
# Review the output to make sure that destination files have been correctly specified

cat $thisKey | grep -v ^# | while read LINE
do newName=${LINE/*,}
if [ ! -f  "$newName" ] 
then echo "absent: " $newName
else echo "found: " $newName 
fi 
done > ${thisKey}.destinationExistenceTestResults.txt



#################################
###
### FUNCTION: rename files with logging (yet to come)
###
#################################
#
# Input: 
# set variable with name of file containing renaming contents
#
# Returns:
# text file named *.RenamingResultsLog.txt indicating whether each  file was copied or not
# 
# Purpose: 
# Review the output to make sure that source files have been correctly moved and address any errors