What's the most compact version of "match everything but these strings" in the shell or regex?

Question

Linux: I want to list all the files in a directory and within its subdirectories, except some strings. For that, I've been using a combination of find/grep/shell globbing. For instance, I want to list all files except those in the directories

./bin
./lib
./resources

I understand this can be done as shown in this question and this other. But both versions are not solving the case "everything, but this pattern" in general terms.

It seems that it is much easier to use a conditional for filtering the results, but I wonder if there is any compact and elegant way of describing this in regexp or in the shell extended globbing.

Thanks.

Answer 1

yourcommand | egrep -v "pattern1|pattern2|pattern3"

Answer 2

Use prune option of find.

find . -path './bin' -prune -o -path './lib' -prune -o -path './resources' -prune -o «rest of your find params»

Answer 3

With bash's extglob shopt setting enabled, you can exclude files with ! in your wildcard pattern. Some examples:

• Everything except bin, lib, and resources

  shopt -s extglob
  ls -Rl !(bin|lib|resources)
  

• Everything with an i in it, except bin and lib

  ls -Rl !(bin|lib|!(*i*))
  

  (Everything that has an i in it is the same as everything except the things that don't have i's in them.)