fix considering base path when ignoring known bad unix paths (#2644)

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

syft/source/directory_source.go

@@ -197,7 +197,7 @@ func getDirectoryExclusionFunctions(root string, exclusions []string) ([]fileres
 	}
 
 	return []fileresolver.PathIndexVisitor{
-		func(path string, info os.FileInfo, _ error) error {
+		func(_, path string, info os.FileInfo, _ error) error {
 			for _, exclusion := range exclusions {
 				// this is required to handle Windows filepaths
 				path = filepath.ToSlash(path)

syft/source/directory_source_test.go

@@ -392,7 +392,7 @@ func Test_getDirectoryExclusionFunctions_crossPlatform(t *testing.T) {
 			require.NoError(t, err)
 
 			for _, f := range fns {
-				result := f(test.path, test.finfo, nil)
+				result := f("", test.path, test.finfo, nil)
 				require.Equal(t, test.walkHint, result)
 			}
 		})

syft/source/file_source.go

@@ -177,7 +177,7 @@ func (s FileSource) FileResolver(_ Scope) (file.Resolver, error) {
 		exclusionFunctions = append([]fileresolver.PathIndexVisitor{
 
 			// note: we should exclude these kinds of paths first before considering any other user-provided exclusions
-			func(p string, _ os.FileInfo, _ error) error {
+			func(_, p string, _ os.FileInfo, _ error) error {
 				if p == absParentDir {
 					// this is the root directory... always include it
 					return nil