Revert "debugger beta: Fix bug where debug Rust main running action f… (#31743)

…ailed (#31291)"

This reverts commit aab76208b5.

Closes #31737

I cannot repro the original issue that this commit was trying to solve
anymore.

Release Notes:

- N/A

crates/debugger_ui/src/session/running.rs

@@ -874,7 +874,6 @@ impl RunningState {
                     args,
                     ..task.resolved.clone()
                 };
-
                 let terminal = project
                     .update_in(cx, |project, window, cx| {
                         project.create_terminal(
@@ -919,6 +918,12 @@ impl RunningState {
             };
 
             if config_is_valid {
+                // Ok(DebugTaskDefinition {
+                //     label,
+                //     adapter: DebugAdapterName(adapter),
+                //     config,
+                //     tcp_connection,
+                // })
             } else if let Some((task, locator_name)) = build_output {
                 let locator_name =
                     locator_name.context("Could not find a valid locator for a build task")?;
@@ -937,7 +942,7 @@ impl RunningState {
 
                 let scenario = dap_registry
                     .adapter(&adapter)
-                    .context(format!("{}: is not a valid adapter name", &adapter))
+                    .ok_or_else(|| anyhow!("{}: is not a valid adapter name", &adapter))
                     .map(|adapter| adapter.config_from_zed_format(zed_config))??;
                 config = scenario.config;
                 Self::substitute_variables_in_config(&mut config, &task_context);

crates/task/src/task_template.rs

@@ -237,18 +237,6 @@ impl TaskTemplate {
             env
         };
 
-        // We filter out env variables here that aren't set so we don't have extra white space in args
-        let args = self
-            .args
-            .iter()
-            .filter(|arg| {
-                arg.starts_with('$')
-                    .then(|| env.get(&arg[1..]).is_some_and(|arg| !arg.trim().is_empty()))
-                    .unwrap_or(true)
-            })
-            .cloned()
-            .collect();
-
         Some(ResolvedTask {
             id: id.clone(),
             substituted_variables,
@@ -268,7 +256,7 @@ impl TaskTemplate {
                     },
                 ),
                 command,
-                args,
+                args: self.args.clone(),
                 env,
                 use_new_terminal: self.use_new_terminal,
                 allow_concurrent_runs: self.allow_concurrent_runs,
@@ -715,7 +703,6 @@ mod tests {
             label: "My task".into(),
             command: "echo".into(),
             args: vec!["$PATH".into()],
-            env: HashMap::from_iter([("PATH".to_owned(), "non-empty".to_owned())]),
             ..TaskTemplate::default()
         };
         let resolved_task = task
@@ -728,32 +715,6 @@ mod tests {
         assert_eq!(resolved.args, task.args);
     }
 
-    #[test]
-    fn test_empty_env_variables_excluded_from_args() {
-        let task = TaskTemplate {
-            label: "My task".into(),
-            command: "echo".into(),
-            args: vec![
-                "$EMPTY_VAR".into(),
-                "hello".into(),
-                "$WHITESPACE_VAR".into(),
-                "$UNDEFINED_VAR".into(),
-                "$WORLD".into(),
-            ],
-            env: HashMap::from_iter([
-                ("EMPTY_VAR".to_owned(), "".to_owned()),
-                ("WHITESPACE_VAR".to_owned(), "   ".to_owned()),
-                ("WORLD".to_owned(), "non-empty".to_owned()),
-            ]),
-            ..TaskTemplate::default()
-        };
-        let resolved_task = task
-            .resolve_task(TEST_ID_BASE, &TaskContext::default())
-            .unwrap();
-        let resolved = resolved_task.resolved;
-        assert_eq!(resolved.args, vec!["hello", "$WORLD"]);
-    }
-
     #[test]
     fn test_errors_on_missing_zed_variable() {
         let task = TaskTemplate {