fix(completion): quoted cell path completion

crates/nu-cli/src/completions/cell_path_completions.rs

@@ -24,7 +24,10 @@ fn prefix_from_path_member(member: &PathMember, pos: usize) -> (String, Span) {
         .get(..pos + 1 - start)
         .map(str::to_string)
         .unwrap_or(prefix_str);
-    (prefix_str, Span::new(start, pos + 1))
+    // strip wrapping quotes
+    let quotations = ['"', '\'', '`'];
+    let prefix_str = prefix_str.strip_prefix(quotations).unwrap_or(&prefix_str);
+    (prefix_str.to_string(), Span::new(start, pos + 1))
 }
 
 impl Completer for CellPathCompletion<'_> {
@@ -108,14 +111,23 @@ fn get_suggestions_by_value(
     value: &Value,
     current_span: reedline::Span,
 ) -> Vec<SemanticSuggestion> {
-    let to_suggestion = |s: String, v: Option<&Value>| SemanticSuggestion {
+    let to_suggestion = |s: String, v: Option<&Value>| {
+        // Check if the string needs quoting (has spaces or punctuation)
+        let value = if s.contains(|c: char| c.is_whitespace() || c.is_ascii_punctuation()) {
+            format!("{:?}", s)
+        } else {
+            s
+        };
+
+        SemanticSuggestion {
             suggestion: Suggestion {
-            value: s,
+                value,
                 span: current_span,
                 description: v.map(|v| v.get_type().to_string()),
                 ..Suggestion::default()
             },
             kind: Some(SuggestionKind::CellPath),
+        }
     };
     match value {
         Value::Record { val, .. } => val

crates/nu-cli/tests/completions/mod.rs

@@ -2007,6 +2007,33 @@ fn table_cell_path_completions() {
     match_suggestions(&expected, &suggestions);
 }
 
+#[test]
+fn quoted_cell_path_completions() {
+    let (_, _, mut engine, mut stack) = new_engine();
+    let command = r#"let foo = {'foo bar':1 'foo\\"bar"': 1 '.': 1 '|': 1}"#;
+    assert!(support::merge_input(command.as_bytes(), &mut engine, &mut stack).is_ok());
+    let mut completer = NuCompleter::new(Arc::new(engine), Arc::new(stack));
+
+    let expected: Vec<_> = vec![
+        "\".\"",
+        "\"foo bar\"",
+        "\"foo\\\\\\\\\\\"bar\\\"\"",
+        "\"|\"",
+    ];
+    let completion_str = "$foo.";
+    let suggestions = completer.complete(completion_str, completion_str.len());
+    match_suggestions(&expected, &suggestions);
+
+    let expected: Vec<_> = vec!["\"foo bar\"", "\"foo\\\\\\\\\\\"bar\\\"\""];
+    let completion_str = "$foo.`foo";
+    let suggestions = completer.complete(completion_str, completion_str.len());
+    match_suggestions(&expected, &suggestions);
+
+    let completion_str = "$foo.foo";
+    let suggestions = completer.complete(completion_str, completion_str.len());
+    match_suggestions(&expected, &suggestions);
+}
+
 #[test]
 fn alias_of_command_and_flags() {
     let (_, _, mut engine, mut stack) = new_engine();