feat: Azure backend implementation

cmd/versitygw/azure.go

@@ -36,13 +36,13 @@ func azureCommand() *cli.Command {
 				Name:        "account",
 				Usage:       "azure account name",
 				EnvVars:     []string{"AZ_ACCESS_KEY"},
-				Aliases:     []string{"s"},
+				Aliases:     []string{"a"},
 				Destination: &azAccount,
 			},
 			&cli.StringFlag{
-				Name:        "secret",
-				Usage:       "azure secret key",
-				EnvVars:     []string{"AZ_SECRET_KEY"},
+				Name:        "account-key",
+				Usage:       "azure account key",
+				EnvVars:     []string{"AZ_ACCOUNT_KEY"},
 				Aliases:     []string{"s"},
 				Destination: &azKey,
 			},
@@ -58,10 +58,6 @@ func azureCommand() *cli.Command {
 }
 
 func runAzure(ctx *cli.Context) error {
-	if ctx.NArg() == 0 {
-		return fmt.Errorf("no directory provided for operation")
-	}
-
 	if azServiceURL == "" {
 		// if not otherwise specified, use the typical form: http(s)://<account>.blob.core.windows.net/
 		azServiceURL = fmt.Sprintf("https://%s.blob.core.windows.net/", azAccount)
@@ -69,7 +65,7 @@ func runAzure(ctx *cli.Context) error {
 
 	be, err := azure.New(azAccount, azKey, azServiceURL)
 	if err != nil {
-		return fmt.Errorf("init posix: %v", err)
+		return fmt.Errorf("init azure: %v", err)
 	}
 
 	return runGateway(ctx.Context, be)