Redmine

require 'redmine/scm/adapters/abstract_adapter'

require 'redmine/scm/adapters/subversion_adapter'

require 'rexml/document'

require 'uri'

require 'tempfile'

      TRAC_WIKI_PAGES = %w(InterMapTxt InterTrac InterWiki RecentChanges SandBox TracAccessibility TracAdmin TracBackup \

                           TracBrowser TracCgi TracChangeset TracInstallPlatforms TracMultipleProjects TracModWSGI \

          name =~ (/(.+?)(?:[\ \t]+(.+)?|[\ \t]+|)$/)

        convert_wiki_text_mapping(text, TICKET_MAP)

        milestone_wiki = Array.new

          milestone_wiki.push(milestone.name);

        # Trac ticket id as a Redmine custom field

        tid = IssueCustomField.find(:first, :conditions => { :name => "TracID" })

        tid = IssueCustomField.new(:name => 'TracID',

                                 :field_format => 'string',

                                 :is_filter => true) if tid.nil?

        tid.trackers = Tracker.find(:all)

        tid.projects << @target_project

        tid.save!

        custom_field_map['tracid'] = tid

                          :description => encode(ticket.description),

              n = Journal.new :notes => (comment_change ? encode(comment_change.newvalue) : ''),

          if custom_field_map['tracid'] 

            custom_values[custom_field_map['tracid'].id] = ticket.id

          end

        end

        puts

    # Now load each wiki page and transform its content into textile format

    print "Transform texts to textile format:"

    puts

    print "   in Wiki pages"

            print '.'

    puts

    print "   in Issue descriptions"

          TICKET_MAP.each do |newId|

            next if newId.nil?

            print '.'

            issue = findIssue(newId)

            next if issue.nil?

            issue.description = convert_wiki_text(issue.description)

      issue.save            

          end

    puts

    print "   in Issue journal descriptions"

          TICKET_MAP.each do |newId|

            next if newId.nil?

            print '.'

            issue = findIssue(newId)

            next if issue.nil?

            issue.journals.find(:all).each do |journal|

              print '.'

              journal.notes = convert_wiki_text(journal.notes)

              journal.save

            end

          end

    puts

    print "   in Milestone descriptions"

          milestone_wiki.each do |name|

            p = wiki.find_page(name)            

            next if p.nil?

            print '.'            

            p.content.text = convert_wiki_text(p.content.text)

            p.content.save

    end

    puts

      def self.findIssue(id)

        return Issue.find(id)

      rescue ActiveRecord::RecordNotFound

  puts

        print "[#{id}] not found"

        nil      

      end

    prompt('Trac database adapter (sqlite, sqlite3, mysql, postgresql)', :default => 'sqlite3') {|adapter| TracMigrate.set_trac_adapter adapter}

  desc 'Subversion migration script'

  task :migrate_from_trac_svn => :environment do

    module SvnMigrate 

        TICKET_MAP = []

        class Commit

          attr_accessor :revision, :message

          def initialize(attributes={})

            self.message = attributes[:message] || ""

            self.revision = attributes[:revision]

          end

        end

        class SvnExtendedAdapter < Redmine::Scm::Adapters::SubversionAdapter

            def set_message(path=nil, revision=nil, msg=nil)

              path ||= ''

              Tempfile.open('msg') do |tempfile|

                # This is a weird thing. We need to cleanup cr/lf so we have uniform line separators              

                tempfile.print msg.gsub(/\r\n/,'\n')

                tempfile.flush

                filePath = tempfile.path.gsub(File::SEPARATOR, File::ALT_SEPARATOR || File::SEPARATOR)

                cmd = "#{SVN_BIN} propset svn:log --quiet --revprop -r #{revision}  -F \"#{filePath}\" "

                cmd << credentials_string

                cmd << ' ' + target(URI.escape(path))

                shellout(cmd) do |io|

                  begin

                    loop do 

                      line = io.readline

                      puts line

                    end

                  rescue EOFError

                  end  

                end

                raise if $? && $?.exitstatus != 0

              end

            end

            def messages(path=nil)

              path ||= ''

              commits = Array.new

              cmd = "#{SVN_BIN} log --xml -r 1:HEAD"

              cmd << credentials_string

              cmd << ' ' + target(URI.escape(path))

              shellout(cmd) do |io|

                begin

                  doc = REXML::Document.new(io)

                  doc.elements.each("log/logentry") do |logentry|

                    commits << Commit.new(

                                                {

                                                  :revision => logentry.attributes['revision'].to_i,

                                                  :message => logentry.elements['msg'].text

                                                })

                  end

                rescue => e

                  puts"Error !!!"

                  puts e

                end

              end

              return nil if $? && $?.exitstatus != 0

              commits

            end

        end

        def self.migrate

          project = Project.find(@@redmine_project)

          if !project

            puts "Could not find project identifier '#{@@redmine_project}'"

            raise 

          end

          tid = IssueCustomField.find(:first, :conditions => { :name => "TracID" })

          if !tid

            puts "Could not find issue custom field 'TracID'"

            raise 

          end

          Issue.find( :all, :conditions => { :project_id => project }).each do |issue|

            val = nil

            issue.custom_values.each do |value|

              if value.custom_field.id == tid.id

                val = value

                break

              end

            end

            TICKET_MAP[val.value.to_i] = issue.id if !val.nil?            

          end

          svn = self.scm          

          msgs = svn.messages(@svn_url)

          msgs.each do |commit| 

            newText = convert_wiki_text(commit.message)

            if newText != commit.message             

              puts "Updating message #{commit.revision}"

              scm.set_message(@svn_url, commit.revision, newText)

            end

          end

        end

        # Basic wiki syntax conversion

        def self.convert_wiki_text(text)

          convert_wiki_text_mapping(text, TICKET_MAP )

        end

        def self.set_svn_url(url)

          @@svn_url = url

        end

        def self.set_svn_username(username)

          @@svn_username = username

        end

        def self.set_svn_password(password)

          @@svn_password = password

        end

        def self.set_redmine_project_identifier(identifier)

          @@redmine_project = identifier

        end

        def self.scm

          @scm ||= SvnExtendedAdapter.new @@svn_url, @@svn_url, @@svn_username, @@svn_password, 0, "", nil

          @scm

        end

    end

    def prompt(text, options = {}, &block)

      default = options[:default] || ''

      while true

        print "#{text} [#{default}]: "

        value = STDIN.gets.chomp!

        value = default if value.blank?

        break if yield value

      end

    end

    puts

    if Redmine::DefaultData::Loader.no_data?

      puts "Redmine configuration need to be loaded before importing data."

      puts "Please, run this first:"

      puts

      puts "  rake redmine:load_default_data RAILS_ENV=\"#{ENV['RAILS_ENV']}\""

      exit

    end

    puts "WARNING: all commit messages with references to trac pages will be modified"

    print "Are you sure you want to continue ? [y/N] "

    break unless STDIN.gets.match(/^y$/i)

    puts

    prompt('Subversion repository url') {|repository| SvnMigrate.set_svn_url repository.strip}

    prompt('Subversion repository username') {|username| SvnMigrate.set_svn_username username}

    prompt('Subversion repository password') {|password| SvnMigrate.set_svn_password password}

    prompt('Redmine project identifier') {|identifier| SvnMigrate.set_redmine_project_identifier identifier}

    puts

    SvnMigrate.migrate

  end

  # Basic wiki syntax conversion

  def convert_wiki_text_mapping(text, ticket_map = [])

        # New line

        text = text.gsub(/\[\[BR\]\]/, "\n") # This has to go before the rules below

        # Titles (only h1. to h6., and remove #...)

        text = text.gsub(/(?:^|^\ +)(\={1,6})\ (.+)\ (?:\1)(?:\ *(\ \#.*))?/) {|s| "\nh#{$1.length}. #{$2}#{$3}\n"}

        # External Links:

        #      [http://example.com/]

        text = text.gsub(/\[((?:https?|s?ftp)\:\S+)\]/, '\1')

        #      [http://example.com/ Example],[http://example.com/ "Example"]

        text = text.gsub(/\[((?:https?|s?ftp)\:\S+)[\ \t]+([\"']?)(.+?)\2\]/, '"\3":\1')

        #      [mailto:some@example.com],[mailto:"some@example.com"]

        text = text.gsub(/\[mailto\:([\"']?)(.+?)\1\]/, '\2')

        # Ticket links:

        #      [ticket:234 Text],[ticket:234 This is a test],[ticket:234 "This is a test"]

        text = text.gsub(/\[ticket\:([^\ ]+)[\ \t]+([\"']?)(.+?)\2\]/, '"\3":/issues/show/\1')

        #      ticket:1234

        #      #1 - working cause Redmine uses the same syntax.

        text = text.gsub(/ticket\:([^\ ]+?)/, '#\1')

        # Source links:

        #      [source:/trunk/readme.txt Readme File],[source:"/trunk/readme.txt" Readme File],

        #      [source:/trunk/readme.txt],[source:"/trunk/readme.txt"]

        #       The text "Readme File" is not converted,

        #       cause Redmine's wiki does not support this.

        text = text.gsub(/\[source\:([\"']?)([^\"']+?)\1(?:\ +(.+?))?\]/, 'source:"\2"')

        #      source:"/trunk/readme.txt"

        #      source:/trunk/readme.txt - working cause Redmine uses the same syntax.

        text = text.gsub(/source\:([\"'])([^\"']+?)\1/, 'source:"\2"')

        # Milestone links:

        #      [milestone:"0.1.0 Mercury" Milestone 0.1.0 (Mercury)],

        #      [milestone:"0.1.0 Mercury"],milestone:"0.1.0 Mercury"

        #       The text "Milestone 0.1.0 (Mercury)" is not converted,

        #       cause Redmine's wiki does not support this.

        text = text.gsub(/\[milestone\:([\"'])([^\"']+?)\1(?:\ +(.+?))?\]/, 'version:"\2"')

        text = text.gsub(/milestone\:([\"'])([^\"']+?)\1/, 'version:"\2"')

        #      [milestone:0.1.0],milestone:0.1.0

        text = text.gsub(/\[milestone\:([^\ ]+?)\]/, 'version:\1')

        text = text.gsub(/milestone\:([^\ ]+?)/, 'version:\1')

        # Internal Links:

        #      ["Some Link"]

        text = text.gsub(/\[([\"'])(.+?)\1\]/) {|s| "[[#{$2.delete(',./?;|:')}]]"}

        #      [wiki:"Some Link" "Link description"],[wiki:"Some Link" Link description]

        text = text.gsub(/\[wiki\:([\"'])([^\]\"']+?)\1[\ \t]+([\"']?)(.+?)\3\]/) {|s| "[[#{$2.delete(',./?;|:')}|#{$4}]]"}

        #      [wiki:"Some Link"]

        text = text.gsub(/\[wiki\:([\"'])([^\]\"']+?)\1\]/) {|s| "[[#{$2.delete(',./?;|:')}]]"}

        #      [wiki:SomeLink]

        text = text.gsub(/\[wiki\:([^\s\]]+?)\]/) {|s| "[[#{$1.delete(',./?;|:')}]]"}

        #      [wiki:SomeLink Link description],[wiki:SomeLink "Link description"]

        text = text.gsub(/\[wiki\:([^\s\]\"']+?)[\ \t]+([\"']?)(.+?)\2\]/) {|s| "[[#{$1.delete(',./?;|:')}|#{$3}]]"}

        # Links to pages UsingJustWikiCaps (not work for unicode)

        text = text.gsub(/([^!]|^)(^| )([A-Z][a-z]+[A-Z][a-zA-Z]+)/, '\\1\\2[[\3]]')

        # Normalize things that were supposed to not be links

        # like !NotALink

        text = text.gsub(/(^| )!([A-Z][A-Za-z]+)/, '\1\2')

        # Revisions links

        text = text.gsub(/\[(\d+)\]/, 'r\1')

        # Ticket number re-writing

        text = text.gsub(/#(\d+)/) do |s|

          if $1.length < 10

#            ticket_map[$1.to_i] ||= $1

            "\##{ticket_map[$1.to_i] || $1}"

          else

            s

          end

        end

        # Before convert Code highlighting, need processing inline code

        #      {{{hello world}}}

        text = text.gsub(/\{\{\{(.+?)\}\}\}/, '@\1@')

        # We would like to convert the Code highlighting too

        # This will go into the next line.

        shebang_line = false

        # Reguar expression for start of code

        pre_re = /\{\{\{/

        # Code hightlighing...

        shebang_re = /^\#\!([a-z]+)/

        # Regular expression for end of code

        pre_end_re = /\}\}\}/

        # Go through the whole text..extract it line by line

        text = text.gsub(/^(.*)$/) do |line|

          m_pre = pre_re.match(line)

          if m_pre

            line = '<pre>'

          else

            m_sl = shebang_re.match(line)

            if m_sl

              shebang_line = true

              line = '<code class="' + m_sl[1] + '">'

            end

            m_pre_end = pre_end_re.match(line)

            if m_pre_end

              line = '</pre>'

              if shebang_line

                line = '</code>' + line

              end

            end

          end

          line

        end

        # Highlighting

        text = text.gsub(/'''''([^\s])/, '_*\1')

        text = text.gsub(/([^\s])'''''/, '\1*_')

        text = text.gsub(/'''/, '*')

        text = text.gsub(/''/, '_')

        text = text.gsub(/__/, '+')

        text = text.gsub(/~~/, '-')

        text = text.gsub(/`/, '@')

        text = text.gsub(/,,/, '~')

        # Tables

        text = text.gsub(/\|\|/, '|')

        # Lists:

        #      bullet

        text = text.gsub(/^(\ +)\* /) {|s| '*' * $1.length + " "}

        #      numbered

        text = text.gsub(/^(\ +)\d+\. /) {|s| '#' * $1.length + " "}

        # Images (work for only attached in current page [[Image(picture.gif)]])

        # need rules for:  * [[Image(wiki:WikiFormatting:picture.gif)]] (referring to attachment on another page)

        #                  * [[Image(ticket:1:picture.gif)]] (file attached to a ticket)

        #                  * [[Image(htdocs:picture.gif)]] (referring to a file inside project htdocs)

        #                  * [[Image(source:/trunk/trac/htdocs/trac_logo_mini.png)]] (a file in repository) 

        text = text.gsub(/\[\[image\((.+?)(?:,.+?)?\)\]\]/i, '!\1!')

        # TOC

        text = text.gsub(/\[\[TOC(?:\((.*?)\))?\]\]/m) {|s| "{{>toc}}\n"}

        text

  end