diff lib/redmine/scm/adapters/darcs_adapter.rb @ 0:513646585e45

* Import Redmine trunk SVN rev 3859

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/redmine/scm/adapters/darcs_adapter.rb	Fri Jul 23 15:52:44 2010 +0100
@@ -0,0 +1,196 @@
+# 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"
+        
+        class << self
+          def client_version
+            @@client_version ||= (darcs_binary_version || [])
+          end
+  	  
+          def darcs_binary_version
+            cmd = "#{DARCS_BIN} --version"
+            version = nil
+            shellout(cmd) do |io|
+              # Read darcs version in first returned line
+              if m = io.gets.match(%r{((\d+\.)+\d+)})
+                version = m[0].scan(%r{\d+}).collect(&:to_i)
+              end
+            end
+            return nil if $? && $?.exitstatus != 0
+            version
+          end
+        end
+
+        def initialize(url, root_url=nil, login=nil, password=nil)
+          @url = url
+          @root_url = url
+        end
+
+        def supports_cat?
+          # cat supported in darcs 2.0.0 and higher
+          self.class.client_version_above?([2, 0, 0])
+        end
+
+        # Get info about the darcs repository
+        def info
+          rev = revisions(nil,nil,nil,{:limit => 1})
+          rev ? Info.new({:root_url => @url, :lastrev => rev.last}) : 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"
+          cmd << " --match #{shell_quote("hash #{identifier}")}" if identifier
+          cmd << " #{shell_quote 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.compact.sort_by_name
+        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 #{shell_quote("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
+        end
+        
+        def diff(path, identifier_from, identifier_to=nil)
+          path = '*' if path.blank?
+          cmd = "#{DARCS_BIN} diff --repodir #{@url}"
+          if identifier_to.nil?
+            cmd << " --match #{shell_quote("hash #{identifier_from}")}"
+          else
+            cmd << " --to-match #{shell_quote("hash #{identifier_from}")}"
+            cmd << " --from-match #{shell_quote("hash #{identifier_to}")}"
+          end
+          cmd << " -u #{shell_quote path}"
+          diff = []
+          shellout(cmd) do |io|
+            io.each_line do |line|
+              diff << line
+            end
+          end
+          return nil if $? && $?.exitstatus != 0
+          diff
+        end
+        
+        def cat(path, identifier=nil)
+          cmd = "#{DARCS_BIN} show content --repodir #{@url}"
+          cmd << " --match #{shell_quote("hash #{identifier}")}" if identifier
+          cmd << " #{shell_quote path}"
+          cat = nil
+          shellout(cmd) do |io|
+            io.binmode
+            cat = io.read
+          end
+          return nil if $? && $?.exitstatus != 0
+          cat
+        end
+
+        private
+        
+        # Returns an Entry from the given XML element
+        # or nil if the entry was deleted
+        def entry_from_xml(element, path_prefix)
+          modified_element = element.elements['modified']
+          if modified_element.elements['modified_how'].text.match(/removed/)
+            return nil
+          end
+          
+          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 => modified_element.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 #{shell_quote("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 CommandFailed
+          paths
+        end
+      end
+    end
+  end
+end