Add patterns_dir configuration option (#2868)

* Add patterns_dir configuration option

* Update config.yaml

---------

Co-authored-by: mmetc <92726601+mmetc@users.noreply.github.com>

pkg/csconfig/config_paths.go

@@ -13,6 +13,7 @@ type ConfigurationPaths struct {
 	HubDir             string `yaml:"hub_dir,omitempty"`
 	PluginDir          string `yaml:"plugin_dir,omitempty"`
 	NotificationDir    string `yaml:"notification_dir,omitempty"`
+	PatternDir         string `yaml:"pattern_dir,omitempty"`
 }
 
 func (c *Config) loadConfigurationPaths() error {
@@ -33,6 +34,10 @@ func (c *Config) loadConfigurationPaths() error {
 		c.ConfigPaths.HubIndexFile = filepath.Clean(c.ConfigPaths.HubDir + "/.index.json")
 	}
 
+	if c.ConfigPaths.PatternDir == "" {
+		c.ConfigPaths.PatternDir = filepath.Join(c.ConfigPaths.ConfigDir, "patterns/")
+	}
+
 	var configPathsCleanup = []*string{
 		&c.ConfigPaths.HubDir,
 		&c.ConfigPaths.HubIndexFile,
@@ -41,6 +46,7 @@ func (c *Config) loadConfigurationPaths() error {
 		&c.ConfigPaths.SimulationFilePath,
 		&c.ConfigPaths.PluginDir,
 		&c.ConfigPaths.NotificationDir,
+		&c.ConfigPaths.PatternDir,
 	}
 	for _, k := range configPathsCleanup {
 		if *k == "" {

pkg/parser/unix_parser.go

@@ -98,7 +98,7 @@ func NewParsers(hub *cwhub.Hub) *Parsers {
 func LoadParsers(cConfig *csconfig.Config, parsers *Parsers) (*Parsers, error) {
 	var err error
 
-	patternsDir := filepath.Join(cConfig.ConfigPaths.ConfigDir, "patterns/")
+	patternsDir := cConfig.ConfigPaths.PatternDir
 	log.Infof("Loading grok library %s", patternsDir)
 	/* load base regexps for two grok parsers */
 	parsers.Ctx, err = Init(map[string]interface{}{"patterns": patternsDir,