Linux how to remove files in one folder where prefixes don’t match another folder?

I want to remove extra files in one folder where the prefix file names don’t match those in the other. A simple example will show:

folderA
    - frame0001.jpg
    - frame0002.jpg
    - frame0003.jpg
    - frame0004.jpg
    - frame0005.jpg
    - frame0006.jpg
    - frame0007.jpg

folderB
    - frame0001_test.jpg
    - frame0003_test.jpg
    - frame0004_test.jpg
    - frame0005_test.jpg
    - frame0007_test.jpg

From folderA I want to remove frame0002.jpg and frame0006.jpg because those frameXXXX prefixes don’t exist in folderB.

How can I do this automatically in 1 command line statement? Assume that the frameXXXX format will be the same for all files between both.

Cheers

Answer

You can use find together with the -exec option.

A basic format would be find . -exec sh -c 'echo {} | grep frame' ;.

Search with find in the folderA and execute a rm if your condition match (or not match). Useful commands are: sed, grep and && rm {}, || rm {}.

EDIT:

find folderA -type f -exec sh -c 'find folderB -type f | grep $(echo {} | grep -Po "frame[0-9]{4}") > /dev/null || echo rm {}' ;

Remove the last echo to invoke the delete if you like the output.

EDIT: Fixed and/or, if grep does not match with the second find than remove the file.