SC2144

-e doesn't work with globs. Use a for loop.

Problematic code:

if [ -e dir/*.mp3 ]
then
  echo "There are mp3 files."
fi

Correct code:

for file in dir/*.mp3
do
  if [ -e "$file" ]
  then
    echo "There are mp3 files"
    break
  fi
done

Rationale:

[ -e file* ] only works if there's 0 or 1 matches. If there are multiple, it becomes [ -e file1 file2 ], and the test fails.

[[ -e file* ]] doesn't work at all.

Instead, use a for loop to expand the glob and check each result individually.

Exceptions

None.