Support uv run --script

[tfsingh]

This PR adds support for executing a script with uv run, even when the script does not have a .py extension. Addresses #7396.

[zanieb]

I think I'd explore something like this instead?

diff --git a/crates/uv/src/commands/project/run.rs b/crates/uv/src/commands/project/run.rs
index 2dc660e34..a375d126e 100644
--- a/crates/uv/src/commands/project/run.rs
+++ b/crates/uv/src/commands/project/run.rs
@@ -862,6 +862,17 @@ impl RunCommand {
         }
     }
 
+    pub(crate) fn force_python_script(self) -> anyhow::Result<Self> {
+        match self {
+            Self::Empty => Ok(self),
+            Self::PythonScript(..) | Self::PythonGuiScript(..) => Ok(self),
+            Self::PythonPackage(..) => {
+                bail!("Target is a directory and cannot be executed as a script")
+            }
+            _ => todo!(),
+        }
+    }
+
     /// Convert a [`RunCommand`] into a [`Command`].
     fn as_command(&self, interpreter: &Interpreter) -> Command {
         match self {
diff --git a/crates/uv/src/lib.rs b/crates/uv/src/lib.rs
index 68efb85b1..b0de789fc 100644
--- a/crates/uv/src/lib.rs
+++ b/crates/uv/src/lib.rs
@@ -135,17 +135,12 @@ async fn run(cli: Cli) -> Result<ExitStatus> {
             command, script, ..
         }) = &**command
         {
-            if *script {
-                let (target, args) = command.split();
-                if let Some(target) = target {
-                    let path = PathBuf::from(&target);
-                    Some(RunCommand::PythonScript(path, args.to_vec()))
-                } else {
-                    anyhow::bail!("Script path must be supplied when using `uv run --script`");
-                }
+            let command = RunCommand::try_from(command)?;
+            Some(if *script {
+                command.force_python_script()?
             } else {
-                Some(RunCommand::try_from(command)?)
-            }
+                command
+            })
         } else {
             None
         }

[zanieb]

Looks like RunComand::from_args was added for --module support, which is also a pretty reasonable approach and simplifies your problem here.

[zanieb]

Thanks!