base.rb in rubygems-requirements-system-0.0.2

- old
+ new

@@ -12,10 +12,12 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 require "fileutils"
+require "open-uri"
+require "tempfile"
 
 require_relative "../executable-finder"
 require_relative "../os-release"
 
 module RubyGemsRequirementsSystem
@@ -77,23 +79,38 @@
       def have_priviledge?
         return true unless need_super_user_priviledge?
         super_user?
       end
 
+      def temporary_file_scope
+        @temporary_files = []
+        begin
+          yield
+        ensure
+          @temporary_files.each(&:close!)
+        end
+      end
+
+      def create_temporary_file(basename)
+        file = Tempfile.new(basename)
+        @temporary_files << file
+        file
+      end
+
       def install_package(package)
-        command_line = prepare_command_line(package)
-        if command_line
-          unless run_command_line(package, "prepare", command_line)
-            return false
+        temporary_file_scope do
+          prepare_command_lines(package).each do |command_line|
+            unless run_command_line(package, "prepare", command_line)
+              return false
+            end
           end
+          run_command_line(package, "install", install_command_line(package))
         end
-        run_command_line(package, "install", install_command_line(package))
       end
 
       def run_command_line(package, action, command_line)
         failed_to_get_super_user_priviledge = false
-        command_line = install_command_line(package)
         if have_priviledge?
           succeeded = system(*command_line)
         else
           if sudo
             prompt = "[sudo] password for %u to #{action} <#{package}>: "
@@ -116,16 +133,16 @@
             Shellwords.escape(part)
           end
           alert_warning("'#{package}' system package is required.")
           alert_warning("Run the following command " +
                         "to #{action} required system package: " +
-                        escaped_command.join(" "))
+                        escaped_command_line.join(" "))
         end
         succeeded
       end
 
-      def prepare_command_line(package)
-        nil
+      def prepare_command_lines(package)
+        []
       end
 
       def install_command_line(package)
         raise NotImpelementedError
       end