uv run: List available scripts when a script is not specified

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

crates/uv-cli/src/lib.rs

@@ -2449,7 +2449,7 @@ pub struct RunArgs {
     /// If the path to a Python script (i.e., ending in `.py`), it will be
     /// executed with the Python interpreter.
     #[command(subcommand)]
-    pub command: ExternalCommand,
+    pub command: Option<ExternalCommand>,
 
     /// Run with the given packages installed.
     ///

crates/uv-python/src/lib.rs

@@ -37,7 +37,7 @@ mod python_version;
 mod target;
 mod version_files;
 mod virtualenv;
-mod which;
+pub mod which;
 
 #[cfg(not(test))]
 pub(crate) fn current_dir() -> Result<std::path::PathBuf, std::io::Error> {

crates/uv-python/src/which.rs

@@ -3,7 +3,7 @@ use std::path::Path;
 /// Check whether a path in PATH is a valid executable.
 ///
 /// Derived from `which`'s `Checker`.
-pub(crate) fn is_executable(path: &Path) -> bool {
+pub fn is_executable(path: &Path) -> bool {
     #[cfg(any(unix, target_os = "wasi", target_os = "redox"))]
     {
         if rustix::fs::access(path, rustix::fs::Access::EXEC_OK).is_err() {

crates/uv/src/commands/project/run.rs

@@ -21,6 +21,7 @@ use uv_distribution::LoweredRequirement;
 use uv_fs::{PythonExt, Simplified};
 use uv_installer::{SatisfiesResult, SitePackages};
 use uv_normalize::PackageName;
+use uv_python::which::is_executable;
 use uv_python::{
     EnvironmentPreference, Interpreter, PythonDownloads, PythonEnvironment, PythonInstallation,
     PythonPreference, PythonRequest, PythonVersionFile, VersionRequest,
@@ -717,6 +718,39 @@ pub(crate) async fn run(
         .as_ref()
         .map_or_else(|| &base_interpreter, |env| env.interpreter());
 
+    // Check if any run command is given.
+    // If not, print the available scripts for the current interpreter.
+    if let RunCommand::Empty = command {
+        println!(
+            "available scripts path: {}",
+            interpreter.scripts().display()
+        );
+
+        interpreter
+            .scripts()
+            .read_dir()
+            .ok()
+            .into_iter()
+            .flatten()
+            .filter_map(|entry| match entry {
+                Ok(entry) => Some(entry),
+                Err(err) => {
+                    warn!("Failed to read entry: {}", err);
+                    None
+                }
+            })
+            .filter(|entry| {
+                entry
+                    .file_type()
+                    .is_ok_and(|file_type| file_type.is_file() || file_type.is_symlink())
+            })
+            .map(|entry| entry.path())
+            .filter(|path| is_executable(path))
+            .for_each(|path| println!("{}", path.display()));
+
+        return Ok(ExitStatus::Success);
+    };
+
     debug!("Running `{command}`");
     let mut process = command.as_command(interpreter);
 

crates/uv/src/lib.rs

@@ -148,7 +148,10 @@ async fn run(cli: Cli) -> Result<ExitStatus> {
     // Parse the external command, if necessary.
     let run_command = if let Commands::Project(command) = &*cli.command {
         if let ProjectCommand::Run(uv_cli::RunArgs { command, .. }) = &**command {
-            Some(RunCommand::try_from(command)?)
+            match command {
+                Some(command) => Some(RunCommand::try_from(command)?),
+                None => Some(RunCommand::Empty),
+            }
         } else {
             None
         }