Added Darcs basic support.

Files in the repository can not be viewed or downloaded since Darcs doesn't support cat-like command.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@573 e93f8b46-1217-0410-a6f0-8f06a7374b81

3 files changed, 170 insertions, 3 deletions

diff --git a/lib/redmine.rb b/lib/redmine.rb
index 76edeca55..f65715899 100644
--- a/lib/redmine.rb
+++ b/lib/redmine.rb
@@ -2,4 +2,4 @@ require 'redmine/version'
 require 'redmine/mime_type'
 require 'redmine/acts_as_watchable/init'
 
-REDMINE_SUPPORTED_SCM = %w( Subversion Mercurial Cvs )
+REDMINE_SUPPORTED_SCM = %w( Subversion Darcs Mercurial Cvs )
diff --git a/lib/redmine/scm/adapters/abstract_adapter.rb b/lib/redmine/scm/adapters/abstract_adapter.rb
index b74fa1b18..16cbef613 100644
--- a/lib/redmine/scm/adapters/abstract_adapter.rb
+++ b/lib/redmine/scm/adapters/abstract_adapter.rb
@@ -35,6 +35,10 @@ module Redmine
           'Abstract'
         end
         
+        def supports_cat?
+          true
+        end
+        
         def root_url
           @root_url
         end
@@ -209,7 +213,7 @@ module Redmine
         def initialize (diff, type="inline")
             diff_table = DiffTable.new type
             diff.each do |line|
-                if line =~ /^(Index:|diff) (.*)$/
+                if line =~ /^(---|\+\+\+) (.*)$/
                     self << diff_table if diff_table.length > 1
                     diff_table = DiffTable.new type
                 end
@@ -237,7 +241,7 @@ module Redmine
         # Function for add a line of this Diff
         def add_line(line)
           unless @parsing
-            if line =~ /^(Index:|diff) (.*)$/
+            if line =~ /^(---|\+\+\+) (.*)$/
               @file_name = $2
               return false
             elsif line =~ /^@@ (\+|\-)(\d+)(,\d+)? (\+|\-)(\d+)(,\d+)? @@/
diff --git a/lib/redmine/scm/adapters/darcs_adapter.rb b/lib/redmine/scm/adapters/darcs_adapter.rb
new file mode 100644
index 000000000..34b36202b
--- /dev/null
+++ b/lib/redmine/scm/adapters/darcs_adapter.rb
@@ -0,0 +1,163 @@
+# redMine - project management software
+# Copyright (C) 2006-2007  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+require 'redmine/scm/adapters/abstract_adapter'
+require 'rexml/document'
+
+module Redmine
+  module Scm
+    module Adapters    
+      class DarcsAdapter < AbstractAdapter      
+        # Darcs executable name
+        DARCS_BIN = "darcs"
+        
+        def initialize(url, root_url=nil, login=nil, password=nil)
+          @url = url
+          @root_url = url
+        end
+
+        def supports_cat?
+          false
+        end
+              
+        # Get info about the svn repository
+        def info
+          rev = revisions(nil,nil,nil,{:limit => 1})
+          rev ? Info.new({:root_url => @url, :lastrev => rev.last}) : nil
+        end
+        
+        # Returns the entry identified by path and revision identifier
+        # or nil if entry doesn't exist in the repository
+        def entry(path=nil, identifier=nil)
+          e = entries(path, identifier)
+          e ? e.first : nil
+        end
+        
+        # Returns an Entries collection
+        # or nil if the given path doesn't exist in the repository
+        def entries(path=nil, identifier=nil)
+          path_prefix = (path.blank? ? '' : "#{path}/")
+          path = '.' if path.blank?
+          entries = Entries.new          
+          cmd = "#{DARCS_BIN} annotate --repodir #{@url} --xml-output #{path}"
+          shellout(cmd) do |io|
+            begin
+              doc = REXML::Document.new(io)
+              if doc.root.name == 'directory'
+                doc.elements.each('directory/*') do |element|
+                  next unless ['file', 'directory'].include? element.name
+                  entries << entry_from_xml(element, path_prefix)
+                end
+              elsif doc.root.name == 'file'
+                entries << entry_from_xml(doc.root, path_prefix)
+              end
+            rescue
+            end
+          end
+          return nil if $? && $?.exitstatus != 0
+          entries.sort_by_name
+        rescue Errno::ENOENT => e
+          raise CommandFailed
+        end
+    
+        def revisions(path=nil, identifier_from=nil, identifier_to=nil, options={})
+          path = '.' if path.blank?
+          revisions = Revisions.new
+          cmd = "#{DARCS_BIN} changes --repodir #{@url} --xml-output"
+          cmd << " --from-match \"hash #{identifier_from}\"" if identifier_from
+          cmd << " --last #{options[:limit].to_i}" if options[:limit]
+          shellout(cmd) do |io|
+            begin
+              doc = REXML::Document.new(io)
+              doc.elements.each("changelog/patch") do |patch|
+                message = patch.elements['name'].text
+                message << "\n" + patch.elements['comment'].text.gsub(/\*\*\*END OF DESCRIPTION\*\*\*.*\z/m, '') if patch.elements['comment']
+                revisions << Revision.new({:identifier => nil,
+                              :author => patch.attributes['author'],
+                              :scmid => patch.attributes['hash'],
+                              :time => Time.parse(patch.attributes['local_date']),
+                              :message => message,
+                              :paths => (options[:with_path] ? get_paths_for_patch(patch.attributes['hash']) : nil)
+                            })
+              end
+            rescue
+            end
+          end
+          return nil if $? && $?.exitstatus != 0
+          revisions
+        rescue Errno::ENOENT => e
+          raise CommandFailed    
+        end
+        
+        def diff(path, identifier_from, identifier_to=nil, type="inline")
+          path = '*' if path.blank?
+          cmd = "#{DARCS_BIN} diff --repodir #{@url}"
+          cmd << " --to-match \"hash #{identifier_from}\""
+          cmd << " --from-match \"hash #{identifier_to}\"" if identifier_to
+          cmd << " -u #{path}"
+          diff = []
+          shellout(cmd) do |io|
+            io.each_line do |line|
+              diff << line
+            end
+          end
+          return nil if $? && $?.exitstatus != 0
+          DiffTableList.new diff, type    
+        rescue Errno::ENOENT => e
+          raise CommandFailed    
+        end
+        
+        private
+                
+        def entry_from_xml(element, path_prefix)
+          Entry.new({:name => element.attributes['name'],
+                     :path => path_prefix + element.attributes['name'],
+                     :kind => element.name == 'file' ? 'file' : 'dir',
+                     :size => nil,
+                     :lastrev => Revision.new({
+                       :identifier => nil,
+                       :scmid => element.elements['modified'].elements['patch'].attributes['hash']
+                       })
+                     })        
+        end
+        
+        # Retrieve changed paths for a single patch
+        def get_paths_for_patch(hash)
+          cmd = "#{DARCS_BIN} annotate --repodir #{@url} --summary --xml-output"
+          cmd << " --match \"hash #{hash}\" "
+          paths = []
+          shellout(cmd) do |io|
+            begin
+              # Darcs xml output has multiple root elements in this case (tested with darcs 1.0.7)
+              # A root element is added so that REXML doesn't raise an error
+              doc = REXML::Document.new("<fake_root>" + io.read + "</fake_root>")
+              doc.elements.each('fake_root/summary/*') do |modif|
+                paths << {:action => modif.name[0,1].upcase,
+                          :path => "/" + modif.text.chomp.gsub(/^\s*/, '')
+                         }
+              end
+            rescue
+            end
+          end
+          paths
+        rescue Errno::ENOENT => e
+          paths
+        end
+      end
+    end
+  end
+end