refactor: add Debug to FsCachedPath (#478)

Author: Boshen

src/cache.rs

@@ -8,8 +8,8 @@ use crate::{Ctx, PackageJson, ResolveError, ResolveOptions, TsConfig};
 
 #[allow(clippy::missing_errors_doc)] // trait impls should be free to return any typesafe error
 pub trait Cache: Sized {
-    type Cp: CachedPath + Clone;
-    type Pj: PackageJson;
+    type Cp: CachedPath + Clone + Debug;
+    type Pj: PackageJson + Debug;
     type Tc: TsConfig + Debug;
 
     /// Clears the cache.

src/fs_cache.rs

@@ -2,6 +2,7 @@ use std::{
     borrow::Cow,
     cell::RefCell,
     convert::AsRef,
+    fmt,
     hash::{BuildHasherDefault, Hash, Hasher},
     io,
     ops::Deref,
@@ -455,6 +456,12 @@ impl PartialEq for FsCachedPath {
 
 impl Eq for FsCachedPath {}
 
+impl fmt::Debug for FsCachedPath {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("FsCachedPath").field("path", &self.path).finish()
+    }
+}
+
 struct BorrowedCachedPath<'a> {
     hash: u64,
     path: &'a Path,