Do not show warning if local dir is pointing to global dir. (#2315)

Author: fnando

cmd/soroban-cli/src/config/locator.rs

@@ -457,6 +457,12 @@ impl Args {
 pub fn print_deprecation_warning(dir: &Path) {
     let print = Print::new(false);
     let global_dir = global_config_path().expect("Couldn't retrieve global directory.");
+    let global_dir = fs::canonicalize(&global_dir).expect("Couldn't expand global directory.");
+
+    // No warning if local and global dirs are the same (e.g., both set to STELLAR_CONFIG_HOME)
+    if dir == global_dir {
+        return;
+    }
 
     print.warnln(format!("A local config was found at {dir:?}."));
     print.blankln(" Local config is deprecated and will be removed in the future.".to_string());
@@ -558,6 +564,7 @@ impl KeyType {
     pub fn list_paths(&self, paths: &[Location]) -> Result<Vec<(String, Location)>, Error> {
         Ok(paths
             .iter()
+            .unique_by(|p| location_to_string(p))
             .flat_map(|p| self.list(p, true).unwrap_or_default())
             .collect())
     }
@@ -662,6 +669,15 @@ fn global_config_path() -> Result<PathBuf, Error> {
     Ok(stellar_dir)
 }
 
+fn location_to_string(location: &Location) -> String {
+    match location {
+        Location::Local(p) | Location::Global(p) => fs::canonicalize(AsRef::<Path>::as_ref(p))
+            .unwrap_or(p.clone())
+            .display()
+            .to_string(),
+    }
+}
+
 // Use locator.global_config_path() to save configurations.
 // This is only to be used to fetch global Stellar config (e.g. to use for defaults)
 pub fn cli_config_file() -> Result<PathBuf, Error> {