comparison app/models/repository/cvs.rb @ 0:513646585e45

* Import Redmine trunk SVN rev 3859

+# 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/cvs_adapter'
+require 'digest/sha1'
+
+class Repository::Cvs < Repository
+  validates_presence_of :url, :root_url
+
+  def scm_adapter
+    Redmine::Scm::Adapters::CvsAdapter
+  end
+  
+  def self.scm_name
+    'CVS'
+  end
+  
+  def entry(path=nil, identifier=nil)
+    rev = identifier.nil? ? nil : changesets.find_by_revision(identifier)
+    scm.entry(path, rev.nil? ? nil : rev.committed_on)
+  end
+  
+  def entries(path=nil, identifier=nil)
+    rev = identifier.nil? ? nil : changesets.find_by_revision(identifier)
+    entries = scm.entries(path, rev.nil? ? nil : rev.committed_on)
+    if entries
+      entries.each() do |entry|
+        unless entry.lastrev.nil? || entry.lastrev.identifier
+          change=changes.find_by_revision_and_path( entry.lastrev.revision, scm.with_leading_slash(entry.path) )
+          if change
+            entry.lastrev.identifier=change.changeset.revision
+            entry.lastrev.author=change.changeset.committer
+            entry.lastrev.revision=change.revision
+            entry.lastrev.branch=change.branch
+          end
+        end
+      end
+    end
+    entries
+  end
+  
+  def cat(path, identifier=nil)
+    rev = identifier.nil? ? nil : changesets.find_by_revision(identifier)
+    scm.cat(path, rev.nil? ? nil : rev.committed_on)
+  end
+  
+  def diff(path, rev, rev_to)
+    #convert rev to revision. CVS can't handle changesets here
+    diff=[]
+    changeset_from=changesets.find_by_revision(rev)
+    if rev_to.to_i > 0 
+      changeset_to=changesets.find_by_revision(rev_to)
+    end
+    changeset_from.changes.each() do |change_from|
+      
+      revision_from=nil
+      revision_to=nil      
+      
+      revision_from=change_from.revision if path.nil? || (change_from.path.starts_with? scm.with_leading_slash(path))
+      
+      if revision_from
+        if changeset_to
+          changeset_to.changes.each() do |change_to|
+            revision_to=change_to.revision if change_to.path==change_from.path 
+          end
+        end
+        unless revision_to
+          revision_to=scm.get_previous_revision(revision_from)
+        end
+        file_diff = scm.diff(change_from.path, revision_from, revision_to)
+        diff = diff + file_diff unless file_diff.nil?
+      end
+    end
+    return diff
+  end
+  
+  def fetch_changesets
+    # some nifty bits to introduce a commit-id with cvs
+    # natively cvs doesn't provide any kind of changesets, there is only a revision per file.
+    # we now take a guess using the author, the commitlog and the commit-date.
+    
+    # last one is the next step to take. the commit-date is not equal for all 
+    # commits in one changeset. cvs update the commit-date when the *,v file was touched. so
+    # we use a small delta here, to merge all changes belonging to _one_ changeset
+    time_delta=10.seconds
+    
+    fetch_since = latest_changeset ? latest_changeset.committed_on : nil
+    transaction do
+      tmp_rev_num = 1
+      scm.revisions('', fetch_since, nil, :with_paths => true) do |revision|
+        # only add the change to the database, if it doen't exists. the cvs log
+        # is not exclusive at all. 
+        unless changes.find_by_path_and_revision(scm.with_leading_slash(revision.paths[0][:path]), revision.paths[0][:revision])
+          revision
+          cs = changesets.find(:first, :conditions=>{
+            :committed_on=>revision.time-time_delta..revision.time+time_delta,
+            :committer=>revision.author,
+            :comments=>Changeset.normalize_comments(revision.message)
+          })
+        
+          # create a new changeset.... 
+          unless cs
+            # we use a temporaray revision number here (just for inserting)
+            # later on, we calculate a continous positive number
+            latest = changesets.find(:first, :order => 'id DESC')
+            cs = Changeset.create(:repository => self,
+                                  :revision => "_#{tmp_rev_num}", 
+                                  :committer => revision.author, 
+                                  :committed_on => revision.time,
+                                  :comments => revision.message)
+            tmp_rev_num += 1
+          end
+        
+          #convert CVS-File-States to internal Action-abbrevations
+          #default action is (M)odified
+          action="M"
+          if revision.paths[0][:action]=="Exp" && revision.paths[0][:revision]=="1.1"
+            action="A" #add-action always at first revision (= 1.1)
+          elsif revision.paths[0][:action]=="dead"
+            action="D" #dead-state is similar to Delete
+          end
+        
+          Change.create(:changeset => cs,
+          :action => action,
+          :path => scm.with_leading_slash(revision.paths[0][:path]),
+          :revision => revision.paths[0][:revision],
+          :branch => revision.paths[0][:branch]
+          )
+        end
+      end
+      
+      # Renumber new changesets in chronological order
+      changesets.find(:all, :order => 'committed_on ASC, id ASC', :conditions => "revision LIKE '_%'").each do |changeset|
+        changeset.update_attribute :revision, next_revision_number
+      end
+    end # transaction
+  end
+  
+  private
+  
+  # Returns the next revision number to assign to a CVS changeset
+  def next_revision_number
+    # Need to retrieve existing revision numbers to sort them as integers
+    @current_revision_number ||= (connection.select_values("SELECT revision FROM #{Changeset.table_name} WHERE repository_id = #{id} AND revision NOT LIKE '_%'").collect(&:to_i).max || 0)
+    @current_revision_number += 1
+  end
+end