fix: change ResolveError::NotFound(PathBuf) to report specifier

src/error.rs

@@ -20,9 +20,9 @@ pub enum ResolveError {
     #[error("Path is ignored {0}")]
     Ignored(PathBuf),
 
-    /// Path not found
-    #[error("Path not found {0}")]
-    NotFound(PathBuf),
+    /// Module not found
+    #[error("Cannot find module '{0}'")]
+    NotFound(/* specifier */ String),
 
     /// Tsconfig not found
     #[error("Tsconfig not found {0}")]

src/lib.rs

@@ -250,7 +250,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
             if let Some(path) = self.load_as_file_or_directory(&path, specifier, ctx)? {
                 return Ok(path);
             }
-            Err(ResolveError::NotFound(cached_path.to_path_buf()))
+            Err(ResolveError::NotFound(specifier.to_string()))
         } else {
             for root in &self.options.roots {
                 let cached_path = self.cache.value(root);
@@ -260,7 +260,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
                     return Ok(path);
                 }
             }
-            Err(ResolveError::NotFound(cached_path.to_path_buf()))
+            Err(ResolveError::NotFound(specifier.to_string()))
         }
     }
 
@@ -279,7 +279,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
             return Ok(path);
         }
         // c. THROW "not found"
-        Err(ResolveError::NotFound(path))
+        Err(ResolveError::NotFound(specifier.to_string()))
     }
 
     fn require_hash(
@@ -353,7 +353,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
             return Ok(path);
         }
         // 7. THROW "not found"
-        Err(ResolveError::NotFound(cached_path.to_path_buf()))
+        Err(ResolveError::NotFound(specifier.to_string()))
     }
 
     /// LOAD_PACKAGE_IMPORTS(X, DIR)
@@ -374,9 +374,9 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
             return Ok(None);
         }
         // 4. let MATCH = PACKAGE_IMPORTS_RESOLVE(X, pathToFileURL(SCOPE), ["node", "require"]) defined in the ESM resolver.
-        let path = self.package_imports_resolve(&package_json, specifier, ctx)?;
+        let path = self.package_imports_resolve(specifier, &package_json, ctx)?;
         // 5. RESOLVE_ESM_MATCH(MATCH).
-        self.resolve_esm_match(&path, &package_json, ctx)
+        self.resolve_esm_match(specifier, &path, &package_json, ctx)
     }
 
     fn load_as_file(&self, cached_path: &CachedPath, ctx: &mut Ctx) -> ResolveResult {
@@ -571,7 +571,9 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
                     // Try foo/node_modules/package_name
                     if cached_path.is_dir(&self.cache.fs) {
                         // a. LOAD_PACKAGE_EXPORTS(X, DIR)
-                        if let Some(path) = self.load_package_exports(subpath, &cached_path, ctx)? {
+                        if let Some(path) =
+                            self.load_package_exports(specifier, subpath, &cached_path, ctx)?
+                        {
                             return Ok(Some(path));
                         }
                     } else {
@@ -620,6 +622,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
 
     fn load_package_exports(
         &self,
+        specifier: &str,
         subpath: &str,
         cached_path: &CachedPath,
         ctx: &mut Ctx,
@@ -646,7 +649,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
                 ctx,
             )? {
                 // 6. RESOLVE_ESM_MATCH(MATCH)
-                return self.resolve_esm_match(&path, &package_json, ctx);
+                return self.resolve_esm_match(specifier, &path, &package_json, ctx);
             };
         }
         Ok(None)
@@ -691,7 +694,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
                 ctx,
             )? {
                 // 6. RESOLVE_ESM_MATCH(MATCH)
-                return self.resolve_esm_match(&cached_path, &package_json, ctx);
+                return self.resolve_esm_match(specifier, &cached_path, &package_json, ctx);
             }
         }
         Ok(None)
@@ -700,24 +703,23 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
     /// RESOLVE_ESM_MATCH(MATCH)
     fn resolve_esm_match(
         &self,
+        specifier: &str,
         cached_path: &CachedPath,
         package_json: &PackageJson,
         ctx: &mut Ctx,
     ) -> ResolveResult {
         if let Some(path) = self.load_browser_field(cached_path, None, package_json, ctx)? {
             return Ok(Some(path));
         }
-
         // 1. let RESOLVED_PATH = fileURLToPath(MATCH)
         // 2. If the file at RESOLVED_PATH exists, load RESOLVED_PATH as its extension format. STOP
         //
         // Non-compliant ESM can result in a directory, so directory is tried as well.
         if let Some(path) = self.load_as_file_or_directory(cached_path, "", ctx)? {
             return Ok(Some(path));
         }
-
         // 3. THROW "not found"
-        Err(ResolveError::NotFound(cached_path.to_path_buf()))
+        Err(ResolveError::NotFound(specifier.to_string()))
     }
 
     /// enhanced-resolve: AliasFieldPlugin for [ResolveOptions::alias_fields]
@@ -743,7 +745,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
                 return if cached_path.is_file(&self.cache.fs) {
                     Ok(Some(cached_path.clone()))
                 } else {
-                    Err(ResolveError::NotFound(cached_path.path().to_path_buf()))
+                    Err(ResolveError::NotFound(new_specifier.to_string()))
                 };
             }
             return Err(ResolveError::Recursion);
@@ -1015,7 +1017,7 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
             }
         }
 
-        Err(ResolveError::NotFound(cached_path.to_path_buf()))
+        Err(ResolveError::NotFound(specifier.to_string()))
     }
 
     /// PACKAGE_EXPORTS_RESOLVE(packageURL, subpath, exports, conditions)
@@ -1124,8 +1126,8 @@ impl<Fs: FileSystem + Default> ResolverGeneric<Fs> {
     /// PACKAGE_IMPORTS_RESOLVE(specifier, parentURL, conditions)
     fn package_imports_resolve(
         &self,
-        package_json: &PackageJson,
         specifier: &str,
+        package_json: &PackageJson,
         ctx: &mut Ctx,
     ) -> Result<CachedPath, ResolveError> {
         // 1. Assert: specifier begins with "#".

src/tests/browser_field.rs

@@ -82,9 +82,9 @@ fn recurse_fail() {
 
     #[rustfmt::skip]
     let data = [
-        ("recurse non existent", f.clone(), "./lib/non-existent.js", ResolveError::NotFound(f.join("lib/non-existent.js"))),
-        ("path partial match 1", f.clone(), "./xyz.js", ResolveError::NotFound(f.join("xyz.js"))),
-        ("path partial match 2", f.clone(), "./lib/xyz.js", ResolveError::NotFound(f.join("lib/xyz.js"))),
+        ("recurse non existent", f.clone(), "./lib/non-existent.js", ResolveError::NotFound("./lib/non-existent.js".into())),
+        ("path partial match 1", f.clone(), "./xyz.js", ResolveError::NotFound("./xyz.js".into())),
+        ("path partial match 2", f.clone(), "./lib/xyz.js", ResolveError::NotFound("./lib/xyz.js".into())),
     ];
 
     for (comment, path, request, expected) in data {

src/tests/builtins.rs

@@ -1,4 +1,4 @@
-use std::path::{Path, PathBuf};
+use std::path::Path;
 
 use crate::{ResolveError, ResolveOptions, Resolver};
 
@@ -7,7 +7,7 @@ fn builtins_off() {
     let f = Path::new("/");
     let resolver = Resolver::default();
     let resolved_path = resolver.resolve(f, "zlib").map(|r| r.full_path());
-    assert_eq!(resolved_path, Err(ResolveError::NotFound(PathBuf::from("/"))));
+    assert_eq!(resolved_path, Err(ResolveError::NotFound("zlib".into())));
 }
 
 #[test]

src/tests/exports_field.rs

@@ -63,7 +63,7 @@ fn test() {
         // ("throw error if extension not provided", f2.clone(), "exports-field/dist/main", ResolveError::NotFound(f2.join("node_modules/exports-field/lib/lib2/main"))),
         ("resolver should respect query parameters #2. Direct matching", f2.clone(), "exports-field?foo", ResolveError::PackagePathNotExported("./?foo".into(), p2.clone())),
         ("resolver should respect fragment parameters #2. Direct matching", f2, "exports-field#foo", ResolveError::PackagePathNotExported("./#foo".into(), p2.clone())),
-        ("relative path should not work with exports field", f.clone(), "./node_modules/exports-field/dist/main.js", ResolveError::NotFound(f.join("node_modules/exports-field/dist/main.js"))),
+        ("relative path should not work with exports field", f.clone(), "./node_modules/exports-field/dist/main.js", ResolveError::NotFound("./node_modules/exports-field/dist/main.js".into())),
         ("backtracking should not work for request", f.clone(), "exports-field/dist/../../../a.js", ResolveError::InvalidPackageTarget("./lib/../../../a.js".to_string(), "/dist/".to_string(), p.clone())),
         ("backtracking should not work for exports field target", f.clone(), "exports-field/dist/a.js", ResolveError::InvalidPackageTarget("./../../a.js".to_string(), "/dist/a.js".to_string(), p.clone())),
         ("not exported error", f.clone(), "exports-field/anything/else", ResolveError::PackagePathNotExported("./anything/else".to_string(), p.clone())),

src/tests/extensions.rs

@@ -29,7 +29,7 @@ fn extensions() {
 
     #[rustfmt::skip]
     let fail = [
-        ("not resolve to file when request has a trailing slash (relative)", "./foo.js/", f.join("foo.js"))
+        ("not resolve to file when request has a trailing slash (relative)", "./foo.js/", "./foo.js/".into())
     ];
 
     for (comment, request, expected_error) in fail {
@@ -93,7 +93,7 @@ fn multi_dot_extension() {
 
     #[rustfmt::skip]
     let fail = [
-        ("not resolve to file", "./index.", f.join("index."))
+        ("not resolve to file", "./index.", "./index.".into())
     ];
 
     for (comment, request, expected_error) in fail {

src/tests/incorrect_description_file.rs

@@ -55,5 +55,5 @@ fn no_description_file() {
     // without description file
     let resolver =
         Resolver::new(ResolveOptions { description_files: vec![], ..ResolveOptions::default() });
-    assert_eq!(resolver.resolve(&f, "."), Err(ResolveError::NotFound(f)));
+    assert_eq!(resolver.resolve(&f, "."), Err(ResolveError::NotFound(".".into())));
 }

src/tests/resolve.rs

@@ -1,6 +1,6 @@
 //! <https://github.com/webpack/enhanced-resolve/blob/main/test/resolve.test.js>
 
-use crate::{ResolveOptions, Resolver};
+use crate::{ResolveError, ResolveOptions, Resolver};
 
 #[test]
 fn resolve() {
@@ -109,3 +109,11 @@ fn resolve_to_context() {
         assert_eq!(resolved_path, Ok(expected), "{comment} {path:?} {request}");
     }
 }
+
+#[test]
+fn resolve_hash_as_module() {
+    let f = super::fixture();
+    let resolver = Resolver::new(ResolveOptions::default());
+    let resolution = resolver.resolve(&f, "#a");
+    assert_eq!(resolution, Err(ResolveError::NotFound("#a".into())));
+}

src/tests/roots.rs

@@ -35,7 +35,7 @@ fn roots() {
 
     #[rustfmt::skip]
     let fail = [
-        ("should not work with relative path", "fixtures/b.js", ResolveError::NotFound(f.clone()))
+        ("should not work with relative path", "fixtures/b.js", ResolveError::NotFound("fixtures/b.js".into()))
     ];
 
     for (comment, request, expected) in fail {

src/tests/tsconfig_paths.rs

@@ -444,6 +444,11 @@ OneTest {
     for test in fail {
         let resolved_path =
             test.resolver(&root).resolve(&root, test.requested_module).map(|f| f.full_path());
-        assert_eq!(resolved_path, Err(ResolveError::NotFound("/root".into())), "{}", test.name);
+        assert_eq!(
+            resolved_path,
+            Err(ResolveError::NotFound(test.requested_module.into())),
+            "{}",
+            test.name
+        );
     }
 }

src/tests/tsconfig_project_references.rs

@@ -51,8 +51,8 @@ fn disabled() {
         (f.join("app"), "@/index.ts", Ok(f.join("app/aliased/index.ts"))),
         (f.join("app"), "@/../index.ts", Ok(f.join("app/index.ts"))),
         // Test project reference
-        (f.join("project_a"), "@/index.ts", Err(ResolveError::NotFound(f.join("project_a")))),
-        (f.join("project_b/src"), "@/index.ts", Err(ResolveError::NotFound(f.join("project_b/src")))),
+        (f.join("project_a"), "@/index.ts", Err(ResolveError::NotFound("@/index.ts".into()))),
+        (f.join("project_b/src"), "@/index.ts", Err(ResolveError::NotFound("@/index.ts".into()))),
         // Does not have paths alias
         (f.join("project_a"), "./index.ts", Ok(f.join("project_a/index.ts"))),
         (f.join("project_c"), "./index.ts", Ok(f.join("project_c/index.ts"))),
@@ -83,7 +83,7 @@ fn manual() {
         (f.join("app"), "@/../index.ts", Ok(f.join("app/index.ts"))),
         // Test project reference
         (f.join("project_a"), "@/index.ts", Ok(f.join("project_a/aliased/index.ts"))),
-        (f.join("project_b/src"), "@/index.ts", Err(ResolveError::NotFound(f.join("project_b/src")))),
+        (f.join("project_b/src"), "@/index.ts", Err(ResolveError::NotFound("@/index.ts".into()))),
         // Does not have paths alias
         (f.join("project_a"), "./index.ts", Ok(f.join("project_a/index.ts"))),
         (f.join("project_c"), "./index.ts", Ok(f.join("project_c/index.ts"))),