Filesystem cd refactor/cleanup.

src/shell/filesystem_shell.rs

@@ -185,29 +185,20 @@ impl Shell for FilesystemShell {
             },
             Some(v) => {
                 let target = v.as_path()?;
+
+                if PathBuf::from("-") == target {
+                    PathBuf::from(&self.last_path)
+                } else {
                     let path = PathBuf::from(self.path());
-                match dunce::canonicalize(path.join(&target).as_path()) {
+
+                    match dunce::canonicalize(path.join(&target)) {
                         Ok(p) => p,
                         Err(_) => {
-                        let error = Err(ShellError::labeled_error(
+                            return Err(ShellError::labeled_error(
                                 "Can not change to directory",
                                 "directory not found",
                                 v.span().clone(),
-                        ));
-
-                        if let Some(t) = target.to_str() {
-                            if t == "-" {
-                                match dunce::canonicalize(PathBuf::from(self.last_path.clone()).as_path()) {
-                                    Ok(p) => p,
-                                    Err(_) => {
-                                        return error;
-                                    }
-                                }
-                            } else {
-                                return error;
-                            }
-                        } else {
-                            return error;
+                            ))
                         }
                     }
                 }
@@ -215,23 +206,12 @@ impl Shell for FilesystemShell {
         };
 
         let mut stream = VecDeque::new();
-        match std::env::set_current_dir(&path) {
-            Ok(_) => {}
-            Err(_) => {
-                if let Some(directory) = args.nth(0) {
-                    return Err(ShellError::labeled_error(
-                        "Can not change to directory",
-                        "directory not found",
-                        directory.span(),
-                    ));
-                } else {
-                    return Err(ShellError::string("Can not change to directory"));
-                }
-            }
-        }
-        stream.push_back(ReturnSuccess::change_cwd(
+
+        stream.push_back(
+            ReturnSuccess::change_cwd(
             path.to_string_lossy().to_string(),
         ));
+        
         Ok(stream.into())
     }
 

tests/command_cd_tests.rs

@@ -1,6 +1,6 @@
 mod helpers;
 
-use helpers::Playground;
+use helpers::{Playground, Stub::*};
 use std::path::PathBuf;
 
 #[test]
@@ -53,9 +53,26 @@ fn filesystem_switch_back_to_previous_working_directory() {
     })
 }
 
+#[test]
+fn filesytem_change_from_current_directory_using_relative_path_and_dash() {
+    Playground::setup("cd_test_4", |dirs, sandbox| {
+        sandbox.within("odin").mkdir("-"); //
+
+        let actual = nu!(
+            cwd: dirs.test(),
+            r#"
+                cd odin/-
+                pwd | echo $it
+            "#
+        );
+
+        assert_eq!(PathBuf::from(actual), dirs.test().join("odin").join("-"));
+    })
+}
+
 #[test]
 fn filesystem_change_current_directory_to_parent_directory() {
-    Playground::setup("cd_test_4", |dirs, _| {
+    Playground::setup("cd_test_5", |dirs, _| {
         let actual = nu!(
             cwd: dirs.test(),
             r#"
@@ -70,7 +87,7 @@ fn filesystem_change_current_directory_to_parent_directory() {
 
 #[test]
 fn file_system_change_to_home_directory() {
-    Playground::setup("cd_test_5", |dirs, _| {
+    Playground::setup("cd_test_6", |dirs, _| {
         let actual = nu!(
             cwd: dirs.test(),
             r#"
@@ -85,7 +102,7 @@ fn file_system_change_to_home_directory() {
 
 #[test]
 fn filesystem_change_to_a_directory_containing_spaces() {
-    Playground::setup("cd_test_6", |dirs, sandbox| {
+    Playground::setup("cd_test_7", |dirs, sandbox| {
         sandbox.mkdir("robalino turner katz");
 
         let actual = nu!(