Add new storage backend: Dropbox (#103)

cmd/backup/config.go

@@ -70,6 +70,8 @@ type Config struct {
 	AzureStorageContainerName     string          `split_words:"true"`
 	AzureStoragePath              string          `split_words:"true"`
 	AzureStorageEndpoint          string          `split_words:"true" default:"https://{{ .AccountName }}.blob.core.windows.net/"`
+	DropboxToken                  string          `split_words:"true"`
+	DropboxRemotePath             string          `split_words:"true"`
 }
 
 func (c *Config) resolveSecret(envVar string, secretPath string) (string, error) {

cmd/backup/script.go

@@ -19,6 +19,7 @@ import (
 
 	"github.com/offen/docker-volume-backup/internal/storage"
 	"github.com/offen/docker-volume-backup/internal/storage/azure"
+	"github.com/offen/docker-volume-backup/internal/storage/dropbox"
 	"github.com/offen/docker-volume-backup/internal/storage/local"
 	"github.com/offen/docker-volume-backup/internal/storage/s3"
 	"github.com/offen/docker-volume-backup/internal/storage/ssh"
@@ -70,11 +71,12 @@ func newScript() (*script, error) {
 			StartTime: time.Now(),
 			LogOutput: logBuffer,
 			Storages: map[string]StorageStats{
-				"S3":     {},
-				"WebDAV": {},
-				"SSH":    {},
-				"Local":  {},
-				"Azure":  {},
+				"S3":      {},
+				"WebDAV":  {},
+				"SSH":     {},
+				"Local":   {},
+				"Azure":   {},
+				"Dropbox": {},
 			},
 		},
 	}
@@ -218,6 +220,18 @@ func newScript() (*script, error) {
 		s.storages = append(s.storages, azureBackend)
 	}
 
+	if s.c.DropboxToken != "" {
+		dropboxConfig := dropbox.Config{
+			Token:      s.c.DropboxToken,
+			RemotePath: s.c.DropboxRemotePath,
+		}
+		dropboxBackend, err := dropbox.NewStorageBackend(dropboxConfig, logFunc)
+		if err != nil {
+			return nil, err
+		}
+		s.storages = append(s.storages, dropboxBackend)
+	}
+
 	if s.c.EmailNotificationRecipient != "" {
 		emailURL := fmt.Sprintf(
 			"smtp://%s:%s@%s:%d/?from=%s&to=%s",