fix: Don't add the new package to workspace.members if there is no existing workspace in Cargo.toml.

Author: linyihai

src/cargo/ops/cargo_new.rs

@@ -15,7 +15,7 @@ use std::io::{BufRead, BufReader, ErrorKind};
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 use std::{fmt, slice};
-use toml_edit::{Array, Value};
+use toml_edit::Value;
 
 #[derive(Clone, Copy, Debug, PartialEq)]
 pub enum VersionControl {
@@ -992,11 +992,6 @@ fn update_manifest_with_new_member(
         if was_sorted {
             members.sort_by(|lhs, rhs| lhs.as_str().cmp(&rhs.as_str()));
         }
-    } else {
-        let mut array = Array::new();
-        array.push(display_path);
-
-        workspace_document["workspace"]["members"] = toml_edit::value(array);
     }
 
     write_atomic(

tests/testsuite/cargo_new/add_lib_into_non_workspace/out/Cargo.toml

@@ -1,4 +1,3 @@
-workspace = { members = ["bar"] }
 [package]
 name = "foo"
 version = "0.1.0"