Failed to exclude missing files from scan

[liorj-orca]

when you have a symbolic link to a file that is either missing(removed for some reason) or link to a file that is out of the attached docker volume, kics stops the scan and throw some error such as:

Preparing Scan Assets: Done
Error: failed to read sources: failed to walk directory: failed to open file: open blabla.json: no such file or directory

I would prefer that in that case, we will just show a log that the file is missing and continue with the scan.
In addition, the bug is when I tried to exclude that file from the scan using '-e' flag I get the same error like it wasn't affecting at all.

for example, let's say we have a file named a.yaml and we create a symlink to that file called b.yaml(in the same directory). if for some reason a.yaml is removed and we run kics like:
kics scan --disable-secrets -p $PWD -e $PWD/b.yaml
then we are getting the error like above.

[kaplanlior]

Thanks @liorj-orca for reporting. I agree we should ignore broken symlinks,
except for the case it's the only scan target.

Notice that in your in both a.yaml & b.yaml are in the same dir,
exclude only one of them would mean the other still gets scanned.

Can I challenge you to also suggest the code fix for the symlink traversal?
(we'll be happy to help if needed)