fix: some unexpected behavior of pixi global update

src/cli/global/update.rs

@@ -28,7 +28,14 @@ pub async fn execute(args: Args) -> miette::Result<()> {
         project: &mut Project,
     ) -> miette::Result<StateChanges> {
         // See what executables were installed prior to update
-        let env_binaries = project.executables_of_direct_dependencies(env_name).await?;
+        let env_binaries = match project.executables_of_direct_dependencies(env_name).await {
+            Ok(env_binaries) => env_binaries,
+            // try to install env if env is not existed.
+            Err(_) => {
+                let _ = project.install_environment(env_name).await?;
+                project.executables_of_direct_dependencies(env_name).await?
+            }
+        };
 
         // Get the exposed binaries from mapping
         let exposed_mapping_binaries = &project

src/global/project/mod.rs

@@ -746,8 +746,14 @@ impl Project {
             .iter()
             .filter_map(|mapping| {
                 // If the executable isn't requested, remove the mapping
+                // Use file name of executable relname here for custom exposed path.
+                // `exposed = {dotnet = 'dotnet\dotnet' }`, file_name will be `dotnet`, eg.
                 if execs_all.iter().all(|executable| {
-                    executable_from_path(&executable.path) != mapping.executable_relname()
+                    executable_from_path(&executable.path)
+                        != PathBuf::from(mapping.executable_relname())
+                            .file_name()
+                            .unwrap_or(OsStr::new(""))
+                            .to_string_lossy()
                 }) {
                     Some(mapping.exposed_name().clone())
                 } else {