no-config flag

parity/cli/mod.rs

@@ -68,6 +68,7 @@ usage! {
 
 		// -- Miscellaneous Options
 		flag_version: bool,
+		flag_no_config: bool,
 	}
 	{
 		// -- Operating Options

parity/cli/usage.rs

@@ -125,6 +125,12 @@ macro_rules! usage {
 
 			pub fn parse<S: AsRef<str>>(command: &[S]) -> Result<Self, ArgsError> {
 				let raw_args = try!(RawArgs::parse(command));
+
+				// Skip loading config file if no_config flag is specified
+				if raw_args.flag_no_config {
+					return Ok(raw_args.into_args(Config::default()));
+				}
+
 				let config_file = raw_args.flag_config.clone().unwrap_or_else(|| raw_args.clone().into_args(Config::default()).flag_config);
 				let config_file = replace_home(&config_file);
 				let config = match (fs::File::open(&config_file), raw_args.flag_config.is_some()) {

parity/cli/usage.txt

@@ -279,6 +279,7 @@ Miscellaneous Options:
                            format as RUST_LOG. (default: {flag_logging:?})
   --log-file FILENAME      Specify a filename into which logging should be
                            directed. (default: {flag_log_file:?})
+  --no-config              Don't load a configuration file.
   --no-color               Don't use terminal color codes in output. (default: {flag_no_color})
   -v --version             Show information about version.
   -h --help                Show this screen.