[badger] Create directory paths automatically and make default dirs work in (#1653)

Windows also, fixes issue #1652

Signed-off-by: Michael Burman <[email protected]>

Author: burmanm

Diff for: plugin/storage/badger/factory.go

@@ -96,6 +96,10 @@ func (f *Factory) Initialize(metricsFactory metrics.Factory, logger *zap.Logger)
 		f.Options.primary.KeyDirectory = f.tmpDir
 		f.Options.primary.ValueDirectory = f.tmpDir
 	} else {
+		// Errors are ignored as they're catched in the Open call
+		initializeDir(f.Options.primary.KeyDirectory)
+		initializeDir(f.Options.primary.ValueDirectory)
+
 		opts.SyncWrites = f.Options.primary.SyncWrites
 		opts.Dir = f.Options.primary.KeyDirectory
 		opts.ValueDir = f.Options.primary.ValueDirectory
@@ -121,6 +125,13 @@ func (f *Factory) Initialize(metricsFactory metrics.Factory, logger *zap.Logger)
 	return nil
 }
 
+// initializeDir makes the directory and parent directories if the path doesn't exists yet.
+func initializeDir(path string) {
+	if _, err := os.Stat(path); err != nil && os.IsNotExist(err) {
+		os.MkdirAll(path, 0700)
+	}
+}
+
 // CreateSpanReader implements storage.Factory
 func (f *Factory) CreateSpanReader() (spanstore.Reader, error) {
 	return badgerStore.NewTraceReader(f.store, f.cache), nil

Diff for: plugin/storage/badger/options.go

@@ -52,23 +52,24 @@ const (
 	suffixSpanstoreTTL        = ".span-store-ttl"
 	suffixSyncWrite           = ".consistency"
 	suffixMaintenanceInterval = ".maintenance-interval"
-	defaultValueDir           = "/data/values"
-	defaultKeysDir            = "/data/keys"
+	defaultDataDir            = string(os.PathSeparator) + "data"
+	defaultValueDir           = defaultDataDir + string(os.PathSeparator) + "values"
+	defaultKeysDir            = defaultDataDir + string(os.PathSeparator) + "keys"
 )
 
 // NewOptions creates a new Options struct.
 func NewOptions(primaryNamespace string, otherNamespaces ...string) *Options {
 
-	defaultDataDir := getCurrentExecutableDir()
+	defaultBadgerDataDir := getCurrentExecutableDir()
 
 	options := &Options{
 		primary: &NamespaceConfig{
 			namespace:           primaryNamespace,
 			SpanStoreTTL:        defaultTTL,
 			SyncWrites:          false, // Performance over durability
 			Ephemeral:           true,  // Default is ephemeral storage
-			ValueDirectory:      defaultDataDir + defaultValueDir,
-			KeyDirectory:        defaultDataDir + defaultKeysDir,
+			ValueDirectory:      defaultBadgerDataDir + defaultValueDir,
+			KeyDirectory:        defaultBadgerDataDir + defaultKeysDir,
 			MaintenanceInterval: defaultMaintenanceInterval,
 		},
 	}