fix(npm): improve error message importing non-existent file in a node_modules npm package (#19835)

cli/npm/resolvers/local.rs

@@ -14,6 +14,7 @@ use std::sync::Arc;
 use crate::cache::CACHE_PERM;
 use crate::npm::cache::mixed_case_package_name_decode;
 use crate::util::fs::atomic_write_file;
+use crate::util::fs::canonicalize_path_maybe_not_exists_with_fs;
 use crate::util::fs::symlink_dir;
 use crate::util::fs::LaxSingleProcessFsFlag;
 use crate::util::progress_bar::ProgressBar;
@@ -112,9 +113,13 @@ impl LocalNpmPackageResolver {
     match self.maybe_resolve_folder_for_specifier(specifier) {
       // Canonicalize the path so it's not pointing to the symlinked directory
       // in `node_modules` directory of the referrer.
-      Some(path) => {
+      Some(path) => canonicalize_path_maybe_not_exists_with_fs(&path, |path| {
-        Ok(deno_core::strip_unc_prefix(self.fs.realpath_sync(&path)?))
+        self
-      }
+          .fs
+          .realpath_sync(path)
+          .map_err(|err| err.into_io_error())
+      })
+      .map_err(|err| err.into()),
       None => bail!("could not find npm package for '{}'", specifier),
     }
   }

cli/tests/integration/npm_tests.rs

@@ -286,6 +286,16 @@ itest!(nonexistent_file {
   exit_code: 1,
 });
 
+itest!(nonexistent_file_node_modules_dir {
+  // there was a bug where the message was different when using a node_modules dir
+  args: "run -A --quiet --node-modules-dir npm/nonexistent_file/main.js",
+  output: "npm/nonexistent_file/main.out",
+  copy_temp_dir: Some("npm/nonexistent_file/"),
+  envs: env_vars_for_npm_tests(),
+  http_server: true,
+  exit_code: 1,
+});
+
 itest!(invalid_package_name {
   args: "run -A --quiet npm/invalid_package_name/main.js",
   output: "npm/invalid_package_name/main.out",

cli/tests/testdata/npm/nonexistent_file/main.js

@@ -1 +1,2 @@
-import hmacSHA512 from "npm:crypto-js/hmac-sha512";
+import hmacSHA512 from "npm:crypto-js/non-existent";
+console.log(hmacSHA512);

cli/tests/testdata/npm/nonexistent_file/main.out

@@ -1,4 +1,4 @@
-error: Unable to load [WILDCARD]hmac-sha512 imported from [WILDCARD]/testdata/npm/nonexistent_file/main.js
+error: Unable to load [WILDCARD]non-existent imported from [WILDCARD]main.js
 
 Caused by:
 [WILDCARD]