fix: won't compile with azblob off

Cargo.toml

@@ -62,14 +62,15 @@ url = "2.5.2"
 unftp-auth-pam = { version = "0.2.5", optional = true }
 
 [features]
-default = ["rest_auth", "cloud_storage", "jsonfile_auth"]
+default = ["rest_auth", "cloud_storage", "jsonfile_auth", "opendal"]
 all_extentions = ["pam_auth", "rest_auth", "jsonfile_auth", "cloud_storage"]
 cloud_storage = ["unftp-sbe-gcs"]
 jsonfile_auth = ["unftp-auth-jsonfile"]
 pam_auth = ["unftp-auth-pam"]
 rest_auth = ["unftp-auth-rest"]
 tokio_console = ["console-subscriber", "tokio/tracing"]
-azblob = ["dep:unftp-sbe-opendal", "dep:opendal", "opendal/services-azblob"]
+opendal = ["dep:unftp-sbe-opendal", "dep:opendal"]
+azblob = ["opendal/services-azblob"]
 
 # With this we link dynamically to libc and pam
 gnu = ["all_extentions"]

src/main.rs

@@ -359,7 +359,8 @@ fn gcs_storage_backend(log: &Logger, m: &clap::ArgMatches) -> Result<VfsProducer
     }))
 }
 
-fn azblob_storage_backend(log: &Logger, m: &clap::ArgMatches) -> Result<VfsProducer, String> {
+#[cfg(feature = "azblob")]
+pub fn azblob_storage_backend(log: &Logger, m: &clap::ArgMatches) -> Result<VfsProducer, String> {
     let mut b = opendal::services::Azblob::default();
     if let Some(val) = m.value_of(args::AZBLOB_ROOT) {
         b.root(val);
@@ -417,6 +418,7 @@ fn start_ftp(
     match m.value_of(args::STORAGE_BACKEND_TYPE) {
         None | Some("filesystem") => svc(fs_storage_backend(root_log, m)),
         Some("gcs") => svc(gcs_storage_backend(root_log, m)?),
+        #[cfg(feature = "azblob")]
         Some("azblob") => svc(azblob_storage_backend(root_log, m)?),
         Some(x) => Err(format!("unknown storage back-end type {}", x)),
     }