CLI: Add missing feature checking and check if someone passes a file (#3283)

polkadot/cli/src/command.rs

@@ -82,7 +82,7 @@ impl SubstrateCli for Cli {
 			#[cfg(feature = "kusama-native")]
 			"kusama-staging" => Box::new(service::chain_spec::kusama_staging_testnet_config()?),
 			#[cfg(not(feature = "kusama-native"))]
-			name if name.starts_with("kusama-") =>
+			name if name.starts_with("kusama-") && !name.ends_with(".json") =>
 				Err(format!("`{}` only supported with `kusama-native` feature enabled.", name))?,
 			"polkadot" => Box::new(service::chain_spec::polkadot_config()?),
 			"polkadot-dev" | "dev" => Box::new(service::chain_spec::polkadot_development_config()?),
@@ -95,7 +95,8 @@ impl SubstrateCli for Cli {
 			"rococo-local" => Box::new(service::chain_spec::rococo_local_testnet_config()?),
 			#[cfg(feature = "rococo-native")]
 			"rococo-staging" => Box::new(service::chain_spec::rococo_staging_testnet_config()?),
-			name if name.starts_with("rococo-") =>
+			#[cfg(not(feature = "rococo-native"))]
+			name if name.starts_with("rococo-") && !name.ends_with(".json") =>
 				Err(format!("`{}` only supported with `rococo-native` feature enabled.", name))?,
 			"westend" => Box::new(service::chain_spec::westend_config()?),
 			#[cfg(feature = "westend-native")]
@@ -105,7 +106,7 @@ impl SubstrateCli for Cli {
 			#[cfg(feature = "westend-native")]
 			"westend-staging" => Box::new(service::chain_spec::westend_staging_testnet_config()?),
 			#[cfg(not(feature = "westend-native"))]
-			name if name.starts_with("westend-") =>
+			name if name.starts_with("westend-") && !name.ends_with(".json") =>
 				Err(format!("`{}` only supported with `westend-native` feature enabled.", name))?,
 			"wococo" => Box::new(service::chain_spec::wococo_config()?),
 			#[cfg(feature = "rococo-native")]