Anilrgowda

I wanted to see if there was an easy way to use say the find command in linux to build a list of files that I can process with Imagemagick

Reason is I am periodically searching a folder e.g. /foo/* for jpg files that have not been processed. A processed file will have an accompanying with the same filename but different extension. This file denotes that the jpg was previously processed. I want to then ignore this file the next time I process the folder. So, I would like to be able to:

List all jpg files that do not have an accompanying file. E.g. in a folder, their contains files, a.jpg, b.jpg, c.jpg, d.jpg, d.mod. I would like a list of files in that folder that would exclude the d.jpg file, leaving a.jpg, b.jpg, c.jpg.

Want to be able to process a folder recursively.

Either throw all the files to a list file, to then process through with a loop or possibly execute the command inline with the search. E.g. the command I can run to process and replace the existing jpg file is mogrify quality 50 /path/to/foo.jpg > /path/to/foo.compressed

Any help would be greatly appreciated.

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Anilrgowda

>>>find . -name '*.jpg' \! -exec bash -c 'test -f `expr substr "$0" 1 \( length "$0" - 4 \)`.mod' {} \; -print
It might be overkill to call bash for each jpg found using exec, especially when there are many jpgs...

@OP, in bash, for one directory. I leave you to find a way for recursive.

for i in *.[jm][op][gd]
do
prefix=${i%%.*}
if [ -f ${prefix}.jpg -a -f ${prefix}.mod ];then
continue
else
echo "$i" #do your image processing here.
fi

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