fix(filesystem): skip cache files by extension

pkg/engine/provider/filesystem.go

@@ -29,6 +29,7 @@ type FileSystemSourceProvider struct {
 
 var (
 	queryRegexExcludeTerraCache = regexp.MustCompile(fmt.Sprintf(`^(.*?%s)?\.terra.*`, regexp.QuoteMeta(string(os.PathSeparator))))
+	queryRegexExcludeCacheFile  = regexp.MustCompile(`^.*\.cache\..+$`)
 	// ErrNotSupportedFile - error representing when a file format is not supported by KICS
 	ErrNotSupportedFile = errors.New("invalid file format")
 )
@@ -260,6 +261,11 @@ func (s *FileSystemSourceProvider) checkConditions(info os.FileInfo, extensions
 		log.Trace().Msgf("File ignored: %s", path)
 		return true, nil
 	}
+	// exclude cache files
+	if queryRegexExcludeCacheFile.MatchString(info.Name()) {
+		log.Trace().Msgf("File ignored: %s", path)
+		return true, nil
+	}
 	ext, _ := utils.GetExtension(path)
 	if !extensions.Include(ext) {
 		log.Trace().Msgf("File ignored: %s", path)

pkg/engine/provider/filesystem_test.go

@@ -283,6 +283,8 @@ func TestFileSystemSourceProvider_checkConditions(t *testing.T) {
 	checkStatErr(t, errTerraCache)
 	infoTerraCacheFolder, errTerraCacheFolder := os.Stat(filepath.FromSlash("test/fixtures/test_terra_cache/.terraform"))
 	checkStatErr(t, errTerraCacheFolder)
+	infoCacheFile, errCacheFile := os.Stat(filepath.FromSlash("test/fixtures/test_cache_file/test.cache.tf"))
+	checkStatErr(t, errCacheFile)
 
 	type fields struct {
 		paths    []string
@@ -597,6 +599,24 @@ func TestFileSystemSourceProvider_checkConditions(t *testing.T) {
 				err: filepath.SkipDir,
 			},
 		},
+		{
+			name: "check_condition_ignore_cache_file for file matching *.cache.* pattern",
+			fields: fields{
+				paths:    []string{filepath.FromSlash("test/fixtures/test_cache_file/test.cache.tf")},
+				excludes: nil,
+			},
+			args: args{
+				info: infoCacheFile,
+				extensions: model.Extensions{
+					".tf": dockerParser.Parser{},
+				},
+				path: filepath.FromSlash("test/fixtures/test_cache_file/test.cache.tf"),
+			},
+			want: want{
+				got: true,
+				err: nil,
+			},
+		},
 		{
 			name: "should_skip_terra_cache_folder",
 			fields: fields{