fn build()

in core/src/services/azdls/backend.rs [160:251]
77 lines of code
3 McCabe index (conditional complexity)

    fn build(self) -> Result<impl Access> {
        debug!("backend build started: {:?}", &self);

        let root = normalize_root(&self.config.root.unwrap_or_default());
        debug!("backend use root {}", root);

        // Handle endpoint, region and container name.
        let filesystem = match self.config.filesystem.is_empty() {
            false => Ok(&self.config.filesystem),
            true => Err(Error::new(ErrorKind::ConfigInvalid, "filesystem is empty")
                .with_operation("Builder::build")
                .with_context("service", Scheme::Azdls)),
        }?;
        debug!("backend use filesystem {}", &filesystem);

        let endpoint = match &self.config.endpoint {
            Some(endpoint) => Ok(endpoint.clone()),
            None => Err(Error::new(ErrorKind::ConfigInvalid, "endpoint is empty")
                .with_operation("Builder::build")
                .with_context("service", Scheme::Azdls)),
        }?;
        debug!("backend use endpoint {}", &endpoint);

        let config_loader = AzureStorageConfig {
            account_name: self
                .config
                .account_name
                .clone()
                .or_else(|| infer_storage_name_from_endpoint(endpoint.as_str())),
            account_key: self.config.account_key.clone(),
            sas_token: None,
            ..Default::default()
        };

        let cred_loader = AzureStorageLoader::new(config_loader);
        let signer = AzureStorageSigner::new();
        Ok(AzdlsBackend {
            core: Arc::new(AzdlsCore {
                info: {
                    let am = AccessorInfo::default();
                    am.set_scheme(Scheme::Azdls)
                        .set_root(&root)
                        .set_name(filesystem)
                        .set_native_capability(Capability {
                            stat: true,
                            stat_has_cache_control: true,
                            stat_has_content_length: true,
                            stat_has_content_type: true,
                            stat_has_content_encoding: true,
                            stat_has_content_range: true,
                            stat_has_etag: true,
                            stat_has_content_md5: true,
                            stat_has_last_modified: true,
                            stat_has_content_disposition: true,

                            read: true,

                            write: true,
                            write_can_append: true,
                            write_with_if_none_match: true,
                            write_with_if_not_exists: true,

                            create_dir: true,
                            delete: true,
                            rename: true,

                            list: true,
                            list_has_etag: true,
                            list_has_content_length: true,
                            list_has_last_modified: true,

                            shared: true,

                            ..Default::default()
                        });

                    // allow deprecated api here for compatibility
                    #[allow(deprecated)]
                    if let Some(client) = self.http_client {
                        am.update_http_client(|_| client);
                    }

                    am.into()
                },
                filesystem: self.config.filesystem.clone(),
                root,
                endpoint,
                loader: cred_loader,
                signer,
            }),
        })
    }