Fixes exception handler for file_not_parseable under file_updater and fixes error handler for package not found error

common/lib/dependabot/errors.rb

@@ -161,6 +161,7 @@ def self.parser_error_details(error)
 
   # rubocop:disable Lint/RedundantCopDisableDirective
   # rubocop:disable Metrics/CyclomaticComplexity
+  # rubocop:disable Metrics/AbcSize
   sig { params(error: StandardError).returns(T.nilable(T::Hash[Symbol, T.untyped])) }
   def self.updater_error_details(error)
     case error
@@ -226,6 +227,14 @@ def self.updater_error_details(error)
           "error-message": error.message
         }
       }
+    when Dependabot::DependencyFileNotParseable
+      {
+        "error-type": "dependency_file_not_parseable",
+        "error-detail": {
+          message: error.message,
+          "file-path": error.file_path
+        }
+      }
     when Dependabot::OutOfDisk
       {
         "error-type": "out_of_disk",
@@ -281,6 +290,7 @@ def self.updater_error_details(error)
   end
   # rubocop:enable Metrics/MethodLength
   # rubocop:enable Metrics/CyclomaticComplexity
+  # rubocop:enable Metrics/AbcSize
   # rubocop:enable Lint/RedundantCopDisableDirective
 
   class DependabotError < StandardError

npm_and_yarn/lib/dependabot/npm_and_yarn/registry_parser.rb

@@ -46,7 +46,10 @@ def dependency_name
                    end
 
         package_name = url_base.gsub("%2F", "/").match(%r{@.*/})
-        "#{T.must(package_name)}#{T.must(url_base.gsub('%2F', '/').split('/').last)}"
+
+        return T.must(url_base.gsub("%2F", "/").split("/").last) unless package_name
+
+        "#{package_name}#{T.must(url_base.gsub('%2F', '/').split('/').last)}"
       end
 
       private

npm_and_yarn/spec/dependabot/npm_and_yarn/file_updater/pnpm_lockfile_updater_spec.rb

@@ -144,6 +144,15 @@
       end
     end
 
+    context "when there is a private registry and package name is not specified" do
+      let(:project_name) { "pnpm/private_package_access_no_package_name" }
+
+      it "raises a helpful error" do
+        expect { updated_pnpm_lock_content }
+          .to raise_error(Dependabot::DependencyNotFound)
+      end
+    end
+
     context "when there is a unsupported engine response (pnpm) from registry" do
       let(:dependency_name) { "eslint" }
       let(:version) { "9.9.0" }

npm_and_yarn/spec/fixtures/projects/pnpm/private_package_access_no_package_name/.npmrc

@@ -0,0 +1 @@
+registry=https://npm.pkg.github.com

npm_and_yarn/spec/fixtures/projects/pnpm/private_package_access_no_package_name/package.json

@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "dep-2": "1.0.3"
+  }
+}