Fixes nil error when svn binary version is unknown (#1607).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1652 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/abstract_adapter.rb

@@ -26,15 +26,24 @@ module Redmine
       class AbstractAdapter #:nodoc:
         class << self
           # Returns the version of the scm client
-          # Eg: [1, 5, 0]
+          # Eg: [1, 5, 0] or [] if unknown
           def client_version
-            'Unknown version'
+            []
           end
           
           # Returns the version string of the scm client
-          # Eg: '1.5.0'
+          # Eg: '1.5.0' or 'Unknown version' if unknown
           def client_version_string
-            client_version.is_a?(Array) ? client_version.join('.') : client_version.to_s
+            v = client_version || 'Unknown version'
+            v.is_a?(Array) ? v.join('.') : v.to_s
+          end
+          
+          # Returns true if the current client version is above
+          # or equals the given one
+          # If option is :unknown is set to true, it will return
+          # true if the client version is unknown
+          def client_version_above?(v, options={})
+            ((client_version <=> v) >= 0) || (client_version.empty? && options[:unknown])
           end
         end
                 

lib/redmine/scm/adapters/mercurial_adapter.rb

@@ -30,7 +30,7 @@ module Redmine
         
         class << self
           def client_version
-            @@client_version ||= (hgversion || 'Unknown version')
+            @@client_version ||= (hgversion || [])
           end
           
           def hgversion  
@@ -52,7 +52,7 @@ module Redmine
           end
           
           def template_path_for(version)
-            if version.is_a?(String) or ((version <=> [0,9,5]) > 0)
+            if ((version <=> [0,9,5]) > 0) || version.empty?
               ver = "1.0"
             else
               ver = "0.9.5"

lib/redmine/scm/adapters/subversion_adapter.rb

@@ -28,7 +28,7 @@ module Redmine
         
         class << self
           def client_version
-            @@client_version ||= (svn_binary_version || 'Unknown version')
+            @@client_version ||= (svn_binary_version || [])
           end
           
           def svn_binary_version
@@ -109,7 +109,7 @@ module Redmine
         
         def properties(path, identifier=nil)
           # proplist xml output supported in svn 1.5.0 and higher
-          return nil if (self.class.client_version <=> [1, 5, 0]) < 0
+          return nil unless self.class.client_version_above?([1, 5, 0])
           
           identifier = (identifier and identifier.to_i > 0) ? identifier.to_i : "HEAD"
           cmd = "#{SVN_BIN} proplist --verbose --xml #{target(path)}@#{identifier}"

test/unit/mercurial_adapter_test.rb

@@ -25,7 +25,7 @@ begin
     def test_template_path
       to_test = { [0,9,5] => "0.9.5",
                   [1,0] => "1.0",
-                  "Unknown version" => "1.0",
+                  [] => "1.0",
                   [1,0,1] => "1.0"}
       
       to_test.each do |v, template|