Use top-level --isolated for uv run (#3431)

## Summary

We already have a global `--isolated`, which means "ignore any on-disk
configuration". I think we should reuse this for the "ignore the
workspace" setting in `uv run`, rather than `--no-workspace`.

I've also merged the existing `--isolated` and `--no-workspace`
behaviors in `uv run` into a single flag. We may not need separate flags
for this, since the current intent seems to be "ignore the workspace
environment"? Though we could always re-add later.

Closes #3421.

crates/uv/src/cli.rs

@@ -1827,10 +1827,6 @@ pub(crate) struct RunArgs {
     #[arg(allow_hyphen_values = true)]
     pub(crate) args: Vec<OsString>,
 
-    /// Always use a new virtual environment for execution.
-    #[arg(long)]
-    pub(crate) isolated: bool,
-
     /// Run with the given packages installed.
     #[arg(long)]
     pub(crate) with: Vec<String>,
@@ -1854,11 +1850,6 @@ pub(crate) struct RunArgs {
         group = "discovery"
     )]
     pub(crate) python: Option<String>,
-
-    /// Run without the current workspace installed.
-    #[arg(long)]
-    pub(crate) no_workspace: bool,
-    // TODO(zanieb): Consider alternative names like `--no-project` or `--without-project`
 }
 
 #[derive(Args)]

crates/uv/src/commands/run.rs

@@ -49,7 +49,6 @@ pub(crate) async fn run(
     mut requirements: Vec<RequirementsSource>,
     python: Option<String>,
     isolated: bool,
-    no_workspace: bool,
     preview: PreviewMode,
     cache: &Cache,
     printer: Printer,
@@ -80,7 +79,7 @@ pub(crate) async fn run(
     // cannot be applied to transitive dependencies.
     let overrides = requirements.clone();
 
-    if !no_workspace {
+    if !isolated {
         if let Some(workspace_requirements) = find_workspace_requirements()? {
             requirements.extend(workspace_requirements);
         }

crates/uv/src/main.rs

@@ -521,8 +521,7 @@ async fn run() -> Result<ExitStatus> {
                 args.args,
                 requirements,
                 args.python,
-                args.isolated,
-                args.no_workspace,
+                cli.isolated,
                 globals.preview,
                 &cache,
                 printer,

crates/uv/src/settings.rs

@@ -85,9 +85,7 @@ pub(crate) struct RunSettings {
     // CLI-only settings.
     pub(crate) target: Option<String>,
     pub(crate) args: Vec<OsString>,
-    pub(crate) isolated: bool,
     pub(crate) with: Vec<String>,
-    pub(crate) no_workspace: bool,
     pub(crate) python: Option<String>,
 }
 
@@ -98,19 +96,15 @@ impl RunSettings {
         let RunArgs {
             target,
             args,
-            isolated,
             with,
-            no_workspace,
             python,
         } = args;
 
         Self {
             // CLI-only settings.
             target,
             args,
-            isolated,
             with,
-            no_workspace,
             python,
         }
     }