Integrate try-runtime into cumulus (#793)

* almost integrate

* revert branch changes

* remove extra deps

* some review comments'

* Fix a bunch of stuff

* Update parachain-template/node/Cargo.toml

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

* Fix

* Fix

* fix benchmark

* fmt

* Remove wrong bench test

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

parachain-template/node/src/command.rs

@@ -13,7 +13,10 @@ use sc_cli::{
 	ChainSpec, CliConfiguration, DefaultConfigurationValues, ImportParams, KeystoreParams,
 	NetworkParams, Result, RuntimeVersion, SharedParams, SubstrateCli,
 };
-use sc_service::config::{BasePath, PrometheusConfig};
+use sc_service::{
+	config::{BasePath, PrometheusConfig},
+	TaskManager,
+};
 use sp_core::hexdisplay::HexDisplay;
 use sp_runtime::traits::Block as BlockT;
 use std::{io::Write, net::SocketAddr};
@@ -237,6 +240,22 @@ pub fn run() -> Result<()> {
 				You can enable it with `--features runtime-benchmarks`."
 					.into())
 			},
+		Some(Subcommand::TryRuntime(cmd)) =>
+			if cfg!(feature = "try-runtime") {
+				let runner = cli.create_runner(cmd)?;
+
+				// grab the task manager.
+				let registry = &runner.config().prometheus_config.as_ref().map(|cfg| &cfg.registry);
+				let task_manager =
+					TaskManager::new(runner.config().tokio_handle.clone(), *registry)
+						.map_err(|e| format!("Error: {:?}", e))?;
+
+				runner.async_run(|config| {
+					Ok((cmd.run::<Block, TemplateRuntimeExecutor>(config), task_manager))
+				})
+			} else {
+				Err("Try-runtime must be enabled by `--features try-runtime`.".into())
+			},
 		None => {
 			let runner = cli.create_runner(&cli.run.normalize())?;