Companion PR for #6564 (#1350)

* Add log_rotation_opt

* Update Cargo lock

* Use SubstrateCli's log-directory instead of re-defining it

polkadot/cli/src/cli.rs

@@ -84,11 +84,9 @@ pub struct RunCmd {
 #[allow(missing_docs)]
 #[derive(Debug, StructOpt)]
 pub struct Cli {
-	#[allow(missing_docs)]
 	#[structopt(subcommand)]
 	pub subcommand: Option<Subcommand>,
 
-	#[allow(missing_docs)]
 	#[structopt(flatten)]
 	pub run: RunCmd,
 }

polkadot/cli/src/command.rs

@@ -19,7 +19,7 @@ use log::info;
 use service::{IdentifyVariant, self};
 #[cfg(feature = "service-rewr")]
 use service_new::{IdentifyVariant, self as service};
-use sc_cli::{SubstrateCli, Result, RuntimeVersion, Role};
+use sc_cli::{CliConfiguration, SubstrateCli, Result, RuntimeVersion, Role};
 use crate::cli::{Cli, Subcommand};
 
 fn get_exec_name() -> Option<String> {
@@ -198,7 +198,7 @@ pub fn run() -> Result<()> {
 			}
 		},
 		Some(Subcommand::ValidationWorker(cmd)) => {
-			sc_cli::init_logger("");
+			sc_cli::init_logger("", cli.run.base.log_rotation_opt()?)?;
 
 			if cfg!(feature = "browser") {
 				Err(sc_cli::Error::Input("Cannot run validation worker in browser".into()))