Revert "util: Check whether discovered powershell is actually executable" (#43247)

Reverts zed-industries/zed#43044
Closes https://github.com/zed-industries/zed/issues/43224

This slows down startup on windows significantly

Release Notes:

- Fixed slow startup on Windows

crates/askpass/src/askpass.rs

@@ -250,7 +250,6 @@ impl PasswordProxy {
             .await
             .with_context(|| format!("creating askpass script at {askpass_script_path:?}"))?;
         make_file_executable(&askpass_script_path).await?;
-        // todo(shell): There might be no powershell on the system
         #[cfg(target_os = "windows")]
         let askpass_helper = format!(
             "powershell.exe -ExecutionPolicy Bypass -File {}",

crates/gpui/src/platform/windows/platform.rs

@@ -390,12 +390,10 @@ impl Platform for WindowsPlatform {
             clippy::disallowed_methods,
             reason = "We are restarting ourselves, using std command thus is fine"
         )]
-        // todo(shell): There might be no powershell on the system
-        let restart_process =
-            util::command::new_std_command(util::shell::get_windows_system_shell())
-                .arg("-command")
-                .arg(script)
-                .spawn();
+        let restart_process = util::command::new_std_command("powershell.exe")
+            .arg("-command")
+            .arg(script)
+            .spawn();
 
         match restart_process {
             Ok(_) => self.quit(),

crates/util/src/shell.rs

@@ -2,8 +2,6 @@ use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use std::{borrow::Cow, fmt, path::Path, sync::LazyLock};
 
-use crate::command::new_std_command;
-
 /// Shell configuration to open the terminal with.
 #[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq, Eq, JsonSchema, Hash)]
 #[serde(rename_all = "snake_case")]
@@ -110,12 +108,16 @@ pub fn get_windows_system_shell() -> String {
     use std::path::PathBuf;
 
     fn find_pwsh_in_programfiles(find_alternate: bool, find_preview: bool) -> Option<PathBuf> {
+        #[cfg(target_pointer_width = "64")]
         let env_var = if find_alternate {
-            if cfg!(target_pointer_width = "64") {
-                "ProgramFiles(x86)"
-            } else {
-                "ProgramW6432"
-            }
+            "ProgramFiles(x86)"
+        } else {
+            "ProgramFiles"
+        };
+
+        #[cfg(target_pointer_width = "32")]
+        let env_var = if find_alternate {
+            "ProgramW6432"
         } else {
             "ProgramFiles"
         };
@@ -163,19 +165,23 @@ pub fn get_windows_system_shell() -> String {
         } else {
             "Microsoft.PowerShell_"
         };
-        msix_app_dir.read_dir().ok()?.find_map(|entry| {
-            let entry = entry.ok()?;
-            if !matches!(entry.file_type(), Ok(ft) if ft.is_dir()) {
-                return None;
-            }
+        msix_app_dir
+            .read_dir()
+            .ok()?
+            .filter_map(|entry| {
+                let entry = entry.ok()?;
+                if !matches!(entry.file_type(), Ok(ft) if ft.is_dir()) {
+                    return None;
+                }
 
-            if !entry.file_name().to_string_lossy().starts_with(prefix) {
-                return None;
-            }
+                if !entry.file_name().to_string_lossy().starts_with(prefix) {
+                    return None;
+                }
 
-            let exe_path = entry.path().join("pwsh.exe");
-            exe_path.exists().then_some(exe_path)
-        })
+                let exe_path = entry.path().join("pwsh.exe");
+                exe_path.exists().then_some(exe_path)
+            })
+            .next()
     }
 
     fn find_pwsh_in_scoop() -> Option<PathBuf> {
@@ -184,37 +190,15 @@ pub fn get_windows_system_shell() -> String {
         pwsh_exe.exists().then_some(pwsh_exe)
     }
 
-    // check whether the found powershell is executable for us
     static SYSTEM_SHELL: LazyLock<String> = LazyLock::new(|| {
-        let can_execute_pwsh = |p: &PathBuf| {
-            #[allow(clippy::disallowed_methods)]
-            let status = new_std_command(p).arg("-NoProfile").arg("-Help").status();
-            let success = status.as_ref().is_ok_and(|status| status.success());
-            if !success {
-                log::warn!(
-                    "Powershell found at `{}` is not executable: {status:?}",
-                    p.display()
-                );
-            }
-            success
-        };
-
-        let locations = [
-            || find_pwsh_in_programfiles(false, false),
-            || find_pwsh_in_programfiles(true, false),
-            || find_pwsh_in_msix(false),
-            || find_pwsh_in_programfiles(false, true),
-            || find_pwsh_in_msix(true),
-            || find_pwsh_in_programfiles(true, true),
-            || find_pwsh_in_scoop(),
-            || which::which_global("pwsh.exe").ok(),
-            || which::which_global("powershell.exe").ok(),
-        ];
-        locations
-            .into_iter()
-            .filter_map(|f| f())
-            .find(|p| can_execute_pwsh(&p))
-            .map(|p| p.to_string_lossy().trim().to_owned())
+        find_pwsh_in_programfiles(false, false)
+            .or_else(|| find_pwsh_in_programfiles(true, false))
+            .or_else(|| find_pwsh_in_msix(false))
+            .or_else(|| find_pwsh_in_programfiles(false, true))
+            .or_else(|| find_pwsh_in_msix(true))
+            .or_else(|| find_pwsh_in_programfiles(true, true))
+            .or_else(find_pwsh_in_scoop)
+            .map(|p| p.to_string_lossy().into_owned())
             .inspect(|shell| log::info!("Found powershell in: {}", shell))
             .unwrap_or_else(|| {
                 log::warn!("Powershell not found, falling back to `cmd`");