fix: don't crash when cwd is not found

Helix is crashing in a few places when it cannot
find the current working directory. Instead of
crashing, this commit ensures it will rely on a
default PathBuffer or display an appropriate
error message in the editor.

This fix the behavior on the global search,
file picker and using the open command.

helix-loader/src/lib.rs

@@ -217,7 +217,7 @@ pub fn merge_toml_values(left: toml::Value, right: toml::Value, merge_depth: usi
 /// If no workspace was found returns (CWD, true).
 /// Otherwise (workspace, false) is returned
 pub fn find_workspace() -> (PathBuf, bool) {
-    let current_dir = std::env::current_dir().expect("unable to determine current directory");
+    let current_dir = std::env::current_dir().unwrap_or_default();
     for ancestor in current_dir.ancestors() {
         if ancestor.join(".git").exists() || ancestor.join(".helix").exists() {
             return (ancestor.to_owned(), false);

helix-term/src/commands.rs

@@ -2068,8 +2068,12 @@ fn global_search(cx: &mut Context) {
                     .binary_detection(BinaryDetection::quit(b'\x00'))
                     .build();
 
-                let search_root = std::env::current_dir()
-                    .expect("Global search error: Failed to get current dir");
+                let search_root = std::env::current_dir();
+                if search_root.is_err() {
+                    _editor.set_error("Global search error: Failed to get current dir");
+                    return;
+                }
+                let search_root = search_root.unwrap();
                 let dedup_symlinks = file_picker_config.deduplicate_links;
                 let absolute_root = search_root
                     .canonicalize()
@@ -2141,7 +2145,9 @@ fn global_search(cx: &mut Context) {
         let call: job::Callback = Callback::EditorCompositor(Box::new(
             move |editor: &mut Editor, compositor: &mut Compositor| {
                 if all_matches.is_empty() {
-                    editor.set_status("No matches found");
+                    if !editor.is_err() {
+                        editor.set_status("No matches found");
+                    }
                     return;
                 }
 

helix-term/src/ui/mod.rs

@@ -476,7 +476,7 @@ pub mod completers {
                 match path.parent() {
                     Some(path) if !path.as_os_str().is_empty() => path.to_path_buf(),
                     // Path::new("h")'s parent is Some("")...
-                    _ => std::env::current_dir().expect("couldn't determine current directory"),
+                    _ => std::env::current_dir().unwrap_or_default(),
                 }
             };