some changes based on MR feedback

lib/gitlab/import_export/command_line_util.rb

@@ -9,11 +9,11 @@ module Gitlab
         untar_with_options(archive: archive, dir: dir, options: 'zxf')
       end
 
-      def git_bundle(git_bin_path: Gitlab.config.git.bin_path, repo_path:, bundle_path:)
+      def git_bundle(repo_path:, bundle_path:)
         execute(%W(#{git_bin_path} --git-dir=#{repo_path} bundle create #{bundle_path} --all))
       end
 
-      def git_unbundle(git_bin_path: Gitlab.config.git.bin_path, repo_path:, bundle_path:)
+      def git_unbundle(repo_path:, bundle_path:)
         execute(%W(#{git_bin_path} clone --bare #{bundle_path} #{repo_path}))
       end
 
@@ -31,6 +31,10 @@ module Gitlab
         _output, status = Gitlab::Popen.popen(cmd)
         status.zero?
       end
+
+      def git_bin_path
+        Gitlab.config.git.bin_path
+      end
     end
   end
 end

lib/gitlab/import_export/import_export_reader.rb

@@ -14,6 +14,7 @@ module Gitlab
         @attributes_parser.find_included(:project).merge(include: build_hash(@tree))
       rescue => e
         @shared.error(e.message)
+        false
       end
 
       private

lib/gitlab/import_export/repo_bundler.rb

@@ -5,7 +5,7 @@ module Gitlab
 
       attr_reader :full_path
 
-      def initialize(project: , shared: )
+      def initialize(project:, shared:)
         @project = project
         @shared = shared
       end

lib/gitlab/import_export/wiki_repo_bundler.rb

@@ -3,14 +3,13 @@ module Gitlab
     class WikiRepoBundler < RepoBundler
       def bundle
         @wiki = ProjectWiki.new(@project)
-        return true if !wiki? # it's okay to have no Wiki
-        @full_path = File.join(@shared.export_path, project_filename)
-        bundle_to_disk
+        return true unless wiki_repository_exists? # it's okay to have no Wiki
+        bundle_to_disk(File.join(@shared.export_path, project_filename))
       end
 
-      def bundle_to_disk
+      def bundle_to_disk(full_path)
         FileUtils.mkdir_p(@shared.export_path)
-        git_bundle(repo_path: path_to_repo, bundle_path: @full_path)
+        git_bundle(repo_path: path_to_repo, bundle_path: full_path)
       rescue => e
         @shared.error(e.message)
         false
@@ -26,7 +25,7 @@ module Gitlab
         @wiki.repository.path_to_repo
       end
 
-      def wiki?
+      def wiki_repository_exists?
         File.exists?(@wiki.repository.path_to_repo) && !@wiki.repository.empty?
       end
     end

spec/lib/gitlab/import_export/import_export_reader_spec.rb

 require 'spec_helper'
 
-describe Gitlab::ImportExport::ImportExportReader do
+describe Gitlab::ImportExport::ImportExportReader, lib: true  do
   let(:shared) { Gitlab::ImportExport::Shared.new(relative_path:'') }
   let(:test_config) { 'spec/support/import_export/import_export.yml' }
   let(:project_tree_hash) do
@@ -16,7 +16,7 @@ describe Gitlab::ImportExport::ImportExportReader do
     }
   end
 
-  it 'should generate hash from project tree config' do
-    expect(described_class.new(config: test_config, shared: shared).project_tree) =~ (project_tree_hash)
+  it 'generates hash from project tree config' do
+    expect(described_class.new(config: test_config, shared: shared).project_tree).to match(project_tree_hash)
   end
 end