Update form to properly set the path

Also includes a change in allowing uploaded files, as there was a
mismatch in object_id between classes, disallowing params[:file], which
is a UploadedFile, newly loaded. The params checked against the older
version.

Fixes gitlab-org/gitlab-ce#36519

app/views/import/gitlab_projects/new.html.haml

@@ -25,7 +25,7 @@
             = hidden_field_tag :namespace_id, value: current_user.namespace_id
     .form-group.col-xs-12.col-sm-6.project-path
       = label_tag :path, 'Project name', class: 'label-light'
-      = text_field_tag :path, nil, placeholder: "my-awesome-project", class: "js-path-name form-control", tabindex: 2, autofocus: true, required: true
+      = text_field_tag :path, @path, placeholder: "my-awesome-project", class: "js-path-name form-control", tabindex: 2, autofocus: true, required: true
 
   .row
     .form-group.col-md-12
@@ -33,7 +33,6 @@
   .row
     .form-group.col-sm-12
       = hidden_field_tag :namespace_id, @namespace.id
-      = hidden_field_tag :path, @path
       = label_tag :file, 'GitLab project export', class: 'label-light'
       .form-group
         = file_field_tag :file, class: ''

config/initializers/workhorse_multipart.rb

@@ -10,10 +10,8 @@ end
 #
 module Gitlab
   module StrongParameterScalars
-    GITLAB_PERMITTED_SCALAR_TYPES = [::UploadedFile].freeze
-
     def permitted_scalar?(value)
-      super || GITLAB_PERMITTED_SCALAR_TYPES.any? { |type| value.is_a?(type) }
+      super || value.is_a?(::UploadedFile)
     end
   end
 end

spec/features/projects/import_export/import_file_spec.rb

@@ -3,11 +3,13 @@ require 'spec_helper'
 feature 'Import/Export - project import integration test', js: true do
   include Select2Helper
 
+  let(:user) { create(:user) }
   let(:file) { File.join(Rails.root, 'spec', 'features', 'projects', 'import_export', 'test_project_export.tar.gz') }
   let(:export_path) { "#{Dir.tmpdir}/import_file_spec" }
 
   background do
     allow_any_instance_of(Gitlab::ImportExport).to receive(:storage_path).and_return(export_path)
+    gitlab_sign_in(user)
   end
 
   after do
@@ -18,57 +20,67 @@ feature 'Import/Export - project import integration test', js: true do
     let(:user) { create(:admin) }
     let!(:namespace) { create(:namespace, name: "asd", owner: user) }
 
-    before do
-      gitlab_sign_in(user)
+    context 'prefilled the path' do
+      scenario 'user imports an exported project successfully' do
+        visit new_project_path
+
+        select2(namespace.id, from: '#project_namespace_id')
+        fill_in :project_path, with: 'test-project-path', visible: true
+        click_link 'GitLab export'
+
+        expect(page).to have_content('Import an exported GitLab project')
+        expect(URI.parse(current_url).query).to eq("namespace_id=#{namespace.id}&path=test-project-path")
+        expect(Gitlab::ImportExport).to receive(:import_upload_path).with(filename: /\A\h{32}_test-project-path\z/).and_call_original
+
+        attach_file('file', file)
+
+        expect { click_on 'Import project' }.to change { Project.count }.by(1)
+
+        project = Project.last
+        expect(project).not_to be_nil
+        expect(project.issues).not_to be_empty
+        expect(project.merge_requests).not_to be_empty
+        expect(project_hook_exists?(project)).to be true
+        expect(wiki_exists?(project)).to be true
+        expect(project.import_status).to eq('finished')
+      end
     end
 
-    scenario 'user imports an exported project successfully' do
-      visit new_project_path
+    context 'path is not prefilled' do
+      scenario 'user imports an exported project successfully' do
+        visit new_project_path
+        click_link 'GitLab export'
 
-      select2(namespace.id, from: '#project_namespace_id')
-      fill_in :project_path, with: 'test-project-path', visible: true
-      click_link 'GitLab export'
+        fill_in :path, with: 'test-project-path', visible: true
+        attach_file('file', file)
 
-      expect(page).to have_content('Import an exported GitLab project')
-      expect(URI.parse(current_url).query).to eq("namespace_id=#{namespace.id}&path=test-project-path")
-      expect(Gitlab::ImportExport).to receive(:import_upload_path).with(filename: /\A\h{32}_test-project-path\z/).and_call_original
+        expect { click_on 'Import project' }.to change { Project.count }.by(1)
 
-      attach_file('file', file)
-
-      expect { click_on 'Import project' }.to change { Project.count }.from(0).to(1)
-
-      project = Project.last
-      expect(project).not_to be_nil
-      expect(project.issues).not_to be_empty
-      expect(project.merge_requests).not_to be_empty
-      expect(project_hook_exists?(project)).to be true
-      expect(wiki_exists?(project)).to be true
-      expect(project.import_status).to eq('finished')
-    end
-
-    scenario 'invalid project' do
-      project = create(:project, namespace: namespace)
-
-      visit new_project_path
-
-      select2(namespace.id, from: '#project_namespace_id')
-      fill_in :project_path, with: project.name, visible: true
-      click_link 'GitLab export'
-      attach_file('file', file)
-      click_on 'Import project'
-
-      page.within('.flash-container') do
-        expect(page).to have_content('Project could not be imported')
+        project = Project.last
+        expect(project).not_to be_nil
+        expect(page).to have_content("Project 'test-project-path' is being imported")
       end
     end
   end
 
-  context 'when limited to the default user namespace' do
-    let(:user) { create(:user) }
-    before do
-      gitlab_sign_in(user)
-    end
+  scenario 'invalid project' do
+    namespace = create(:namespace, name: "asd", owner: user)
+    project = create(:project, namespace: namespace)
 
+    visit new_project_path
+
+    select2(namespace.id, from: '#project_namespace_id')
+    fill_in :project_path, with: project.name, visible: true
+    click_link 'GitLab export'
+    attach_file('file', file)
+    click_on 'Import project'
+
+    page.within('.flash-container') do
+      expect(page).to have_content('Project could not be imported')
+    end
+  end
+
+  context 'when limited to the default user namespace' do
     scenario 'passes correct namespace ID in the URL' do
       visit new_project_path