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Full Discussion: Script to compare files in 2 folders and delete the large file
Top Forums Shell Programming and Scripting Script to compare files in 2 folders and delete the large file Post 302999860 by jim mcnamara on Thursday 29th of June 2017 12:58:03 AM
Old 06-29-2017
IF I understand:

You have one filename with several different extensions (or in windows, file types):
example filename.aa filename.qb filename.abcd and maybe more.

If this is correct you need to aggregate all of the complete filenames by just the part before the dot in the filename.

What you need for input is
Code:
 the filename with no directory name and without a type
 size of the file in bytes
 the full filename  (directory/filename.filetype)

Output has to be the full filename and maybe the size, but only for the largest file in bytes.

You then LOOK at the output to make sure you did not screw up somehow, right?

Then finally you feed the full filenames in the output file to the rm command.

So:
Code:
# get all the filenames in one place -> /tmp/list
find /path/to/directory1 /path/to/directory2 -type f > /tmp/list
#  you now have all the file names
#
# rewrite /tmp/list to have the correct values
while read fname   # fname is the complete file name
do
      shortfile=$(basename $fname)
      shortfile=${shortfile%%.*}
      size=(stat -c '%s' $fname)
      
      print " $shortfile $size $fname"
done < /tmp/list > /tmp/next

# /tmp/next has the data, so let's sort and aggregate it -  assuming no spaces in the shortfile name
# sort by shortfile

sort -k1 -k2n -o /tmp/next /tmp/next

# aggregate
# awk fields are $1 - shortfile, $2 - size,  $3 - fullname
awk '{ 
         arr($1)=$3 " " $2  # note that the last values to be stored for shortfile
                                   # come from  the last time shortfile is in the file
                                   
        }
         END { for (i in arr) {print arr(i)} }
        ' /tmp/next > /tmp/final
        
# delete ONLY after you check /tmp/final
while read fname
do 
     rm $fname
done < /tmp/final

This code is meant more to learn from than production. Others will show you how to make it more efficient. You need to understand this one first.
This User Gave Thanks to jim mcnamara For This Post:
drl
 

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LEARN ABOUT FREEBSD

dh_movefiles

DH_MOVEFILES(1) 						     Debhelper							   DH_MOVEFILES(1)

NAME

       dh_movefiles - move files out of debian/tmp into subpackages

SYNOPSIS

       dh_movefiles [debhelperoptions] [--sourcedir=dir] [-Xitem] [file...]

DESCRIPTION

       dh_movefiles is a debhelper program that is responsible for moving files out of debian/tmp or some other directory and into other package
       build directories. This may be useful if your package has a Makefile that installs everything into debian/tmp, and you need to break that
       up into subpackages.

       Note: dh_install is a much better program, and you are recommended to use it instead of dh_movefiles.

FILES

       debian/package.files
	   Lists the files to be moved into a package, separated by whitespace. The filenames listed should be relative to debian/tmp/. You can
	   also list directory names, and the whole directory will be moved.

OPTIONS

       --sourcedir=dir
	   Instead of moving files out of debian/tmp (the default), this option makes it move files out of some other directory. Since the entire
	   contents of the sourcedir is moved, specifying something like --sourcedir=/ is very unsafe, so to prevent mistakes, the sourcedir must
	   be a relative filename; it cannot begin with a `/'.

       -Xitem, --exclude=item
	   Exclude files that contain item anywhere in their filename from being installed.

       file ...
	   Lists files to move. The filenames listed should be relative to debian/tmp/. You can also list directory names, and the whole directory
	   will be moved. It is an error to list files here unless you use -p, -i, or -a to tell dh_movefiles which subpackage to put them in.

NOTES

       Note that files are always moved out of debian/tmp by default (even if you have instructed debhelper to use a compatibility level higher
       than one, which does not otherwise use debian/tmp for anything at all). The idea behind this is that the package that is being built can be
       told to install into debian/tmp, and then files can be moved by dh_movefiles from that directory. Any files or directories that remain are
       ignored, and get deleted by dh_clean later.

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Joey Hess <joeyh@debian.org>

11.1.6ubuntu2							    2018-05-10							   DH_MOVEFILES(1)
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