Tame overeager wallet manager (solana-labs#9262)

* Add helper fn to check for usb cli args

* Use helper fn to prevent wallet_manager connecting unnecessarily

* Review improvements

clap-utils/src/keypair.rs

@@ -47,6 +47,13 @@ pub fn parse_keypair_path(path: &str) -> KeypairUrl {
     }
 }
 
+pub fn check_for_usb<S>(mut items: impl Iterator<Item = S>) -> bool
+where
+    S: Into<String>,
+{
+    items.any(|arg| matches!(parse_keypair_path(&arg.into()), KeypairUrl::Usb(_)))
+}
+
 pub fn presigner_from_pubkey_sigs(
     pubkey: &Pubkey,
     signers: &[(Pubkey, Signature)],
@@ -256,4 +263,20 @@ mod tests {
             sanitize_seed_phrase(seed_phrase)
         );
     }
+
+    #[test]
+    fn test_check_for_usb() {
+        let args: Vec<&str> = vec![];
+        assert_eq!(check_for_usb(args.into_iter()), false);
+        let args = vec!["usb://"];
+        assert_eq!(check_for_usb(args.into_iter()), true);
+        let args = vec!["other"];
+        assert_eq!(check_for_usb(args.into_iter()), false);
+        let args = vec!["other", "usb://", "another"];
+        assert_eq!(check_for_usb(args.into_iter()), true);
+        let args = vec!["other", "another"];
+        assert_eq!(check_for_usb(args.into_iter()), false);
+        let args = vec!["usb://", "usb://"];
+        assert_eq!(check_for_usb(args.into_iter()), true);
+    }
 }

cli/src/main.rs

@@ -2,7 +2,9 @@ use clap::{crate_description, crate_name, AppSettings, Arg, ArgGroup, ArgMatches
 use console::style;
 
 use solana_clap_utils::{
-    input_validators::is_url, keypair::SKIP_SEED_PHRASE_VALIDATION_ARG, offline::SIGN_ONLY_ARG,
+    input_validators::is_url,
+    keypair::{check_for_usb, SKIP_SEED_PHRASE_VALIDATION_ARG},
+    offline::SIGN_ONLY_ARG,
     DisplayError,
 };
 use solana_cli::{
@@ -233,12 +235,20 @@ fn main() -> Result<(), Box<dyn error::Error>> {
     )
     .get_matches();
 
-    do_main(&matches).map_err(|err| DisplayError::new_as_boxed(err).into())
+    do_main(&matches, check_for_usb(std::env::args()))
+        .map_err(|err| DisplayError::new_as_boxed(err).into())
 }
 
-fn do_main(matches: &ArgMatches<'_>) -> Result<(), Box<dyn error::Error>> {
+fn do_main(
+    matches: &ArgMatches<'_>,
+    need_wallet_manager: bool,
+) -> Result<(), Box<dyn error::Error>> {
     if parse_settings(&matches)? {
-        let wallet_manager = maybe_wallet_manager()?;
+        let wallet_manager = if need_wallet_manager {
+            maybe_wallet_manager()?
+        } else {
+            None
+        };
 
         let (mut config, signers) = parse_args(&matches, wallet_manager)?;
         config.signers = signers.iter().map(|s| s.as_ref()).collect();

keygen/src/keygen.rs

@@ -8,7 +8,7 @@ use num_cpus;
 use solana_clap_utils::{
     input_validators::is_derivation,
     keypair::{
-        keypair_from_seed_phrase, prompt_passphrase, signer_from_path,
+        check_for_usb, keypair_from_seed_phrase, prompt_passphrase, signer_from_path,
         SKIP_SEED_PHRASE_VALIDATION_ARG,
     },
     DisplayError,
@@ -407,7 +407,11 @@ fn do_main(matches: &ArgMatches<'_>) -> Result<(), Box<dyn error::Error>> {
         Config::default()
     };
 
-    let wallet_manager = maybe_wallet_manager()?;
+    let wallet_manager = if check_for_usb(std::env::args()) {
+        maybe_wallet_manager()?
+    } else {
+        None
+    };
 
     match matches.subcommand() {
         ("pubkey", Some(matches)) => {