cli overhaul (#1600)

* cli commands

* cleanup parity/signer

* cleanup parity/signer

* remove redundant import of signer crate from main.rs

* cli cleanup in progress

* cli cleanup in progress

* moved few commonly used functions to separate methods with tests

* cleaning up blockchain import in progress

* cleaning up blockchain import in progress2

* cleaning up blockchain import in progress3

* tests for database compaction profile parsing

* cleaning up blockchain import in progress4

* cleaning up blockchain import in progress5

* blockchain import

* export blockchain in progress

* cleanup execute_export

* Configuration::to_duration cleaned up

* removed unused code, tests for to_duration

* cleanup Configuration::mode function

* parsing some of the cli params in params.rs

* rpc and signer are no longer optional

* move importing extern crates to main.rs file

* swipe dies from rpc module

* swipe dies from dapps

* finding deprecated

* several tests and fixes for parity

* parity cleanup in progress

* cleanup price parsing

* parity cleanup in progress

* swiped all dies

* parity cleanup in progress

* replace usages of from_str with parse() in parity/params.rs

* removed few more from_str

* split parity/params.rs into params and helpers

* removed wildcard import from configuration.rs

* cleanup directories/path creation

* cleaning up run cmd

* moved LoggerConfig

* defaults for cli params

* fixed indention in raise_fd_limit

* tests for rpc_apis

* tests for default ipc and rpc settings

* ipc socket

* cleanup in progress

* account service

* cleanup miner config

* BlockChain commands use Directiores structure now

* client_config

* network settings and dapps configuration

* removing warnings

* default logger config

* fixed client_path

* overhaul

* fixing export && import

* default export DataFormat

* import and export also upgrade db

* fixed export && import

* polishing pr

* polishing pr

* fixed custom bootnodes

* fixed daemonize on windows

* fixed setting up enable network

* finished pr

* fixed compiling on windows

* Fixed warning; windows build

* Better cache management

* Fixed tests on windows

* Fixed test

* Restored pruning method names

* --cache alias

* Fixed more tests

* Ensure default options actually listed as valid

[ci:skip]

ethcore/src/trace/config.rs

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Traces config.
+use std::str::FromStr;
 use bloomchain::Config as BloomConfig;
 use trace::Error;
 
@@ -29,6 +30,25 @@ pub enum Switch {
 	Auto,
 }
 
+impl Default for Switch {
+	fn default() -> Self {
+		Switch::Auto
+	}
+}
+
+impl FromStr for Switch {
+	type Err = String;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		match s {
+			"on" => Ok(Switch::On),
+			"off" => Ok(Switch::Off),
+			"auto" => Ok(Switch::Auto),
+			other => Err(format!("Invalid switch value: {}", other))
+		}
+	}
+}
+
 impl Switch {
 	/// Tries to turn old switch to new value.
 	pub fn turn_to(&self, to: Switch) -> Result<bool, Error> {
@@ -41,7 +61,7 @@ impl Switch {
 }
 
 /// Traces config.
-#[derive(Debug, Clone)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct Config {
 	/// Indicates if tracing should be enabled or not.
 	/// If it's None, it will be automatically configured.
@@ -55,7 +75,7 @@ pub struct Config {
 impl Default for Config {
 	fn default() -> Self {
 		Config {
-			enabled: Switch::Auto,
+			enabled: Switch::default(),
 			blooms: BloomConfig {
 				levels: 3,
 				elements_per_index: 16,
@@ -64,3 +84,20 @@ impl Default for Config {
 		}
 	}
 }
+
+#[cfg(test)]
+mod tests {
+	use super::Switch;
+
+	#[test]
+	fn test_switch_parsing() {
+		assert_eq!(Switch::On, "on".parse().unwrap());
+		assert_eq!(Switch::Off, "off".parse().unwrap());
+		assert_eq!(Switch::Auto, "auto".parse().unwrap());
+	}
+
+	#[test]
+	fn test_switch_default() {
+		assert_eq!(Switch::default(), Switch::Auto);
+	}
+}