Refactor to consistently use resolved cwd

Author: maxmynter

crates/ruff/src/resolve.rs

@@ -24,10 +24,12 @@ pub fn resolve(
     let Ok(cwd) = std::env::current_dir() else {
         bail!("Working directory does not exist")
     };
+    let cwd = cwd.parse_dot()?;
+
     // First priority: if we're running in isolated mode, use the default settings.
     if config_arguments.isolated {
         let config = config_arguments.transform(Configuration::default());
-        let settings = config.into_settings(&cwd.parse_dot()?)?;
+        let settings = config.into_settings(&cwd)?;
         debug!("Isolated mode, not reading any pyproject.toml");
         return Ok(PyprojectConfig::new(
             PyprojectDiscoveryStrategy::Fixed,
@@ -62,7 +64,7 @@ pub fn resolve(
     // the "closest" `pyproject.toml` file for every Python file later on,
     // so these act as the "default" settings.)
     if let Some(pyproject) =
-        pyproject::find_settings_toml(stdin_filename.as_ref().unwrap_or(&cwd.as_path()))?
+        pyproject::find_settings_toml(stdin_filename.as_ref().unwrap_or(&cwd.as_ref()))?
     {
         debug!(
             "Using configuration file (via parent) at: {}",
@@ -132,13 +134,13 @@ pub fn resolve(
         // However, there may be a `pyproject.toml` with a `requires-python`
         // specified, and that is what we look for in this step.
         let fallback =
-            find_fallback_target_version(stdin_filename.as_ref().unwrap_or(&cwd.as_path()));
+            find_fallback_target_version(stdin_filename.as_ref().unwrap_or(&cwd.as_ref()));
         if let Some(version) = fallback {
             debug!("Derived `target-version` from found `requires-python`: {version:?}");
         }
         config.target_version = fallback.map(ast::PythonVersion::from);
     }
-    let settings = config.into_settings(&cwd.parse_dot()?)?;
+    let settings = config.into_settings(&cwd)?;
     Ok(PyprojectConfig::new(
         PyprojectDiscoveryStrategy::Hierarchical,
         settings,