Redmine

# Redmine - project management software

# Copyright (C) 2006-  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 'active_record'

require 'pp'

namespace :redmine do

  desc 'Trac migration script'

  task :migrate_from_trac => :environment do

    module TracMigrate

        TICKET_MAP = []

        new_status = IssueStatus.find_by_position(1)

        assigned_status = IssueStatus.find_by_position(2)

        resolved_status = IssueStatus.find_by_position(3)

        feedback_status = IssueStatus.find_by_position(4)

        closed_status = IssueStatus.where(:is_closed => true).first

        STATUS_MAPPING = {'new' => new_status,

                          'reopened' => feedback_status,

                          'assigned' => assigned_status,

                          'closed' => closed_status

                          }

        priorities = IssuePriority.all

        DEFAULT_PRIORITY = priorities[0]

        PRIORITY_MAPPING = {'lowest' => priorities[0],

                            'low' => priorities[0],

                            'normal' => priorities[1],

                            'high' => priorities[2],

                            'highest' => priorities[3],

                            # ---

                            'trivial' => priorities[0],

                            'minor' => priorities[1],

                            'major' => priorities[2],

                            'critical' => priorities[3],

                            'blocker' => priorities[4]

                            }

        TRACKER_BUG = Tracker.find_by_position(1)

        TRACKER_FEATURE = Tracker.find_by_position(2)

        DEFAULT_TRACKER = TRACKER_BUG

        TRACKER_MAPPING = {'defect' => TRACKER_BUG,

                           'enhancement' => TRACKER_FEATURE,

                           'task' => TRACKER_FEATURE,

                           'patch' =>TRACKER_FEATURE

                           }

        roles = Role.where(:builtin => 0).order('position ASC').all

        manager_role = roles[0]

        developer_role = roles[1]

        DEFAULT_ROLE = roles.last

        ROLE_MAPPING = {'admin' => manager_role,

                        'developer' => developer_role

                        }

      class ::Time

        class << self

          alias :real_now :now

          def now

            real_now - @fake_diff.to_i

          end

          def fake(time)

            @fake_diff = real_now - time

            res = yield

            @fake_diff = 0

           res

          end

        end

      end

      class TracComponent < ActiveRecord::Base

        self.table_name = :component

      end

      class TracMilestone < ActiveRecord::Base

        self.table_name = :milestone

        # If this attribute is set a milestone has a defined target timepoint

        def due

          if read_attribute(:due) && read_attribute(:due) > 0

            Time.at(read_attribute(:due)).to_date

          else

            nil

          end

        end

        # This is the real timepoint at which the milestone has finished.

        def completed

          if read_attribute(:completed) && read_attribute(:completed) > 0

            Time.at(read_attribute(:completed)).to_date

          else

            nil

          end

        end

        def description

          # Attribute is named descr in Trac v0.8.x

          has_attribute?(:descr) ? read_attribute(:descr) : read_attribute(:description)

        end

      end

      class TracTicketCustom < ActiveRecord::Base

        self.table_name = :ticket_custom

      end

      class TracAttachment < ActiveRecord::Base

        self.table_name = :attachment

        set_inheritance_column :none

        def time; Time.at(read_attribute(:time)) end

        def original_filename

          filename

        end

        def content_type

          ''

        end

        def exist?

          File.file? trac_fullpath

        end

        def open

          File.open("#{trac_fullpath}", 'rb') {|f|

            @file = f

            yield self

          }

        end

        def read(*args)

          @file.read(*args)

        end

        def description

          read_attribute(:description).to_s.slice(0,255)

        end

      private

        def trac_fullpath

          attachment_type = read_attribute(:type)

          #replace exotic characters with their hex representation to avoid invalid filenames

          trac_file = filename.gsub( /[^a-zA-Z0-9\-_\.!~*']/n ) do |x|

            codepoint = x.codepoints.to_a[0]

            sprintf('%%%02x', codepoint)

          end

          "#{TracMigrate.trac_attachments_directory}/#{attachment_type}/#{id}/#{trac_file}"

        end

      end

      class TracTicket < ActiveRecord::Base

        self.table_name = :ticket

        set_inheritance_column :none

        # ticket changes: only migrate status changes and comments

        has_many :ticket_changes, :class_name => "TracTicketChange", :foreign_key => :ticket

        has_many :customs, :class_name => "TracTicketCustom", :foreign_key => :ticket

        def attachments

          TracMigrate::TracAttachment.all(:conditions => ["type = 'ticket' AND id = ?", self.id.to_s])

        end

        def ticket_type

          read_attribute(:type)

        end

        def summary

          read_attribute(:summary).blank? ? "(no subject)" : read_attribute(:summary)

        end

        def description

          read_attribute(:description).blank? ? summary : read_attribute(:description)

        end

        def time; Time.at(read_attribute(:time)) end

        def changetime; Time.at(read_attribute(:changetime)) end

      end

      class TracTicketChange < ActiveRecord::Base

        self.table_name = :ticket_change

        def self.columns

          # Hides Trac field 'field' to prevent clash with AR field_changed? method (Rails 3.0)

          super.select {|column| column.name.to_s != 'field'}

        end

        def time; Time.at(read_attribute(:time)) end

      end

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

                           TracEnvironment TracFastCgi TracGuide TracImport TracIni TracInstall TracInterfaceCustomization \

                           TracLinks TracLogging TracModPython TracNotification TracPermissions TracPlugins TracQuery \

                           TracReports TracRevisionLog TracRoadmap TracRss TracSearch TracStandalone TracSupport TracSyntaxColoring TracTickets \

                           TracTicketsCustomFields TracTimeline TracUnicode TracUpgrade TracWiki WikiDeletePage WikiFormatting \

                           WikiHtml WikiMacros WikiNewPage WikiPageNames WikiProcessors WikiRestructuredText WikiRestructuredTextLinks \

                           CamelCase TitleIndex)

      class TracWikiPage < ActiveRecord::Base

        self.table_name = :wiki

        set_primary_key :name

        def self.columns

          # Hides readonly Trac field to prevent clash with AR readonly? method (Rails 2.0)

          super.select {|column| column.name.to_s != 'readonly'}

        end

        def attachments

          TracMigrate::TracAttachment.all(:conditions => ["type = 'wiki' AND id = ?", self.id.to_s])

        end

        def time; Time.at(read_attribute(:time)) end

      end

      class TracPermission < ActiveRecord::Base

        self.table_name = :permission

      end

      class TracSessionAttribute < ActiveRecord::Base

        self.table_name = :session_attribute

      end

      def self.find_or_create_user(username, project_member = false)

        return User.anonymous if username.blank?

        u = User.find_by_login(username)

        if !u

          # Create a new user if not found

          mail = username[0, User::MAIL_LENGTH_LIMIT]

          if mail_attr = TracSessionAttribute.find_by_sid_and_name(username, 'email')

            mail = mail_attr.value

          end

          mail = "#{mail}@foo.bar" unless mail.include?("@")

          name = username

          if name_attr = TracSessionAttribute.find_by_sid_and_name(username, 'name')

            name = name_attr.value

          end

          name =~ (/(\w+)(\s+\w+)?/)

          fn = ($1 || "-").strip

          ln = ($2 || '-').strip

          u = User.new :mail => mail.gsub(/[^-@a-z0-9\.]/i, '-'),

                       :firstname => fn[0, limit_for(User, 'firstname')],

                       :lastname => ln[0, limit_for(User, 'lastname')]

          u.login = username[0, User::LOGIN_LENGTH_LIMIT].gsub(/[^a-z0-9_\-@\.]/i, '-')

          u.password = 'trac'

          u.admin = true if TracPermission.find_by_username_and_action(username, 'admin')

          # finally, a default user is used if the new user is not valid

          u = User.first unless u.save

        end

        # Make sure user is a member of the project

        if project_member && !u.member_of?(@target_project)

          role = DEFAULT_ROLE

          if u.admin

            role = ROLE_MAPPING['admin']

          elsif TracPermission.find_by_username_and_action(username, 'developer')

            role = ROLE_MAPPING['developer']

          end

          Member.create(:user => u, :project => @target_project, :roles => [role])

          u.reload

        end

        u

      end

      # Basic wiki syntax conversion

      def self.convert_wiki_text(text)

        # Titles

        text = text.gsub(/^(\=+)\s(.+)\s(\=+)/) {|s| "\nh#{$1.length}. #{$2}\n"}

        # External Links

        text = text.gsub(/\[(http[^\s]+)\s+([^\]]+)\]/) {|s| "\"#{$2}\":#{$1}"}

        # Ticket links:

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

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

        #      ticket:1234

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

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

        # Milestone links:

        #      [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(/\[milestone\:\"([^\"]+)\"\ (.+?)\]/, 'version:"\1"')

        #      [milestone:"0.1.0 Mercury"]

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

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

        #      milestone:0.1.0

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

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

        # Internal Links

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

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

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

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

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

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

  # Links to pages UsingJustWikiCaps

  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

        # We would like to convert the Code highlighting too

        # This will go into the next line.

        shebang_line = false

        # Regular expression for start of code

        pre_re = /\{\{\{/

        # Code highlighting...

        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(/,,/, '~')

        # Lists

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

        text

      end

      def self.migrate

        establish_connection

        # Quick database test

        TracComponent.count

        migrated_components = 0

        migrated_milestones = 0

        migrated_tickets = 0

        migrated_custom_values = 0

        migrated_ticket_attachments = 0

        migrated_wiki_edits = 0

        migrated_wiki_attachments = 0

        #Wiki system initializing...

        @target_project.wiki.destroy if @target_project.wiki

        @target_project.reload

        wiki = Wiki.new(:project => @target_project, :start_page => 'WikiStart')

        wiki_edit_count = 0

        # Components

        print "Migrating components"

        issues_category_map = {}

        TracComponent.all.each do |component|

        print '.'

        STDOUT.flush

          c = IssueCategory.new :project => @target_project,

                                :name => encode(component.name[0, limit_for(IssueCategory, 'name')])

        next unless c.save

        issues_category_map[component.name] = c

        migrated_components += 1

        end

        puts

        # Milestones

        print "Migrating milestones"

        version_map = {}

        TracMilestone.all.each do |milestone|

          print '.'

          STDOUT.flush

          # First we try to find the wiki page...

          p = wiki.find_or_new_page(milestone.name.to_s)

          p.content = WikiContent.new(:page => p) if p.new_record?

          p.content.text = milestone.description.to_s

          p.content.author = find_or_create_user('trac')

          p.content.comments = 'Milestone'

          p.save

          v = Version.new :project => @target_project,

                          :name => encode(milestone.name[0, limit_for(Version, 'name')]),

                          :description => nil,

                          :wiki_page_title => milestone.name.to_s,

                          :effective_date => milestone.completed

          next unless v.save

          version_map[milestone.name] = v

          migrated_milestones += 1

        end

        puts

        # Custom fields

        # TODO: read trac.ini instead

        print "Migrating custom fields"

        custom_field_map = {}

        TracTicketCustom.find_by_sql("SELECT DISTINCT name FROM #{TracTicketCustom.table_name}").each do |field|

          print '.'

          STDOUT.flush

          # Redmine custom field name

          field_name = encode(field.name[0, limit_for(IssueCustomField, 'name')]).humanize

          # Find if the custom already exists in Redmine

          f = IssueCustomField.find_by_name(field_name)

          # Or create a new one

          f ||= IssueCustomField.create(:name => encode(field.name[0, limit_for(IssueCustomField, 'name')]).humanize,

                                        :field_format => 'string')

          next if f.new_record?

          f.trackers = Tracker.all

          f.projects << @target_project

          custom_field_map[field.name] = f

        end

        puts

        # Trac 'resolution' field as a Redmine custom field

        r = IssueCustomField.find_by(:name => "Resolution")

        r = IssueCustomField.new(:name => 'Resolution',

                                 :field_format => 'list',

                                 :is_filter => true) if r.nil?

        r.trackers = Tracker.all

        r.projects << @target_project

        r.possible_values = (r.possible_values + %w(fixed invalid wontfix duplicate worksforme)).flatten.compact.uniq

        r.save!

        custom_field_map['resolution'] = r

        # Tickets

        print "Migrating tickets"

          TracTicket.find_each(:batch_size => 200) do |ticket|

          print '.'

          STDOUT.flush

          i = Issue.new :project => @target_project,

                          :subject => encode(ticket.summary[0, limit_for(Issue, 'subject')]),

                          :description => convert_wiki_text(encode(ticket.description)),

                          :priority => PRIORITY_MAPPING[ticket.priority] || DEFAULT_PRIORITY,

                          :created_on => ticket.time

          i.author = find_or_create_user(ticket.reporter)

          i.category = issues_category_map[ticket.component] unless ticket.component.blank?

          i.fixed_version = version_map[ticket.milestone] unless ticket.milestone.blank?

          i.tracker = TRACKER_MAPPING[ticket.ticket_type] || DEFAULT_TRACKER

          i.status = STATUS_MAPPING[ticket.status] || i.default_status

          i.id = ticket.id unless Issue.exists?(ticket.id)

          next unless Time.fake(ticket.changetime) { i.save }

          TICKET_MAP[ticket.id] = i.id

          migrated_tickets += 1

          # Owner

            unless ticket.owner.blank?

              i.assigned_to = find_or_create_user(ticket.owner, true)

              Time.fake(ticket.changetime) { i.save }

            end

          # Comments and status/resolution changes

          ticket.ticket_changes.group_by(&:time).each do |time, changeset|

              status_change = changeset.select {|change| change.field == 'status'}.first

              resolution_change = changeset.select {|change| change.field == 'resolution'}.first

              comment_change = changeset.select {|change| change.field == 'comment'}.first

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

                              :created_on => time

              n.user = find_or_create_user(changeset.first.author)

              n.journalized = i

              if status_change &&

                   STATUS_MAPPING[status_change.oldvalue] &&

                   STATUS_MAPPING[status_change.newvalue] &&

                   (STATUS_MAPPING[status_change.oldvalue] != STATUS_MAPPING[status_change.newvalue])

                n.details << JournalDetail.new(:property => 'attr',

                                               :prop_key => 'status_id',

                                               :old_value => STATUS_MAPPING[status_change.oldvalue].id,

                                               :value => STATUS_MAPPING[status_change.newvalue].id)

              end

              if resolution_change

                n.details << JournalDetail.new(:property => 'cf',

                                               :prop_key => custom_field_map['resolution'].id,

                                               :old_value => resolution_change.oldvalue,

                                               :value => resolution_change.newvalue)

              end

              n.save unless n.details.empty? && n.notes.blank?

          end

          # Attachments

          ticket.attachments.each do |attachment|

            next unless attachment.exist?

              attachment.open {

                a = Attachment.new :created_on => attachment.time

                a.file = attachment

                a.author = find_or_create_user(attachment.author)

                a.container = i

                a.description = attachment.description

                migrated_ticket_attachments += 1 if a.save

              }

          end

          # Custom fields

          custom_values = ticket.customs.inject({}) do |h, custom|

            if custom_field = custom_field_map[custom.name]

              h[custom_field.id] = custom.value

              migrated_custom_values += 1

            end

            h

          end

          if custom_field_map['resolution'] && !ticket.resolution.blank?

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

          end

          i.custom_field_values = custom_values

          i.save_custom_field_values

        end

        # update issue id sequence if needed (postgresql)

        Issue.connection.reset_pk_sequence!(Issue.table_name) if Issue.connection.respond_to?('reset_pk_sequence!')

        puts

        # Wiki

        print "Migrating wiki"

        if wiki.save

          TracWikiPage.order('name, version').all.each do |page|

            # Do not migrate Trac manual wiki pages

            next if TRAC_WIKI_PAGES.include?(page.name)

            wiki_edit_count += 1

            print '.'

            STDOUT.flush

            p = wiki.find_or_new_page(page.name)

            p.content = WikiContent.new(:page => p) if p.new_record?

            p.content.text = page.text

            p.content.author = find_or_create_user(page.author) unless page.author.blank? || page.author == 'trac'

            p.content.comments = page.comment

            Time.fake(page.time) { p.new_record? ? p.save : p.content.save }

            next if p.content.new_record?

            migrated_wiki_edits += 1

            # Attachments

            page.attachments.each do |attachment|

              next unless attachment.exist?

              next if p.attachments.find_by_filename(attachment.filename.gsub(/^.*(\\|\/)/, '').gsub(/[^\w\.\-]/,'_')) #add only once per page

              attachment.open {

                a = Attachment.new :created_on => attachment.time

                a.file = attachment

                a.author = find_or_create_user(attachment.author)

                a.description = attachment.description

                a.container = p

                migrated_wiki_attachments += 1 if a.save

              }

            end

          end

          wiki.reload

          wiki.pages.each do |page|

            page.content.text = convert_wiki_text(page.content.text)

            Time.fake(page.content.updated_on) { page.content.save }

          end

        end

        puts

        puts

        puts "Components:      #{migrated_components}/#{TracComponent.count}"

        puts "Milestones:      #{migrated_milestones}/#{TracMilestone.count}"

        puts "Tickets:         #{migrated_tickets}/#{TracTicket.count}"

        puts "Ticket files:    #{migrated_ticket_attachments}/" + TracAttachment.count(:conditions => {:type => 'ticket'}).to_s

        puts "Custom values:   #{migrated_custom_values}/#{TracTicketCustom.count}"

        puts "Wiki edits:      #{migrated_wiki_edits}/#{wiki_edit_count}"

        puts "Wiki files:      #{migrated_wiki_attachments}/" + TracAttachment.count(:conditions => {:type => 'wiki'}).to_s

      end

      def self.limit_for(klass, attribute)

        klass.columns_hash[attribute.to_s].limit

      end

      def self.encoding(charset)

        @charset = charset

      end

      def self.set_trac_directory(path)

        @@trac_directory = path

        raise "This directory doesn't exist!" unless File.directory?(path)

        raise "#{trac_attachments_directory} doesn't exist!" unless File.directory?(trac_attachments_directory)

        @@trac_directory

      rescue => e

        puts e

        return false

      end

      def self.trac_directory

        @@trac_directory

      end

      def self.set_trac_adapter(adapter)

        return false if adapter.blank?

        raise "Unknown adapter: #{adapter}!" unless %w(sqlite3 mysql postgresql).include?(adapter)

        # If adapter is sqlite or sqlite3, make sure that trac.db exists

        raise "#{trac_db_path} doesn't exist!" if %w(sqlite3).include?(adapter) && !File.exist?(trac_db_path)

        @@trac_adapter = adapter

      rescue => e

        puts e

        return false

      end

      def self.set_trac_db_host(host)

        return nil if host.blank?

        @@trac_db_host = host

      end

      def self.set_trac_db_port(port)

        return nil if port.to_i == 0

        @@trac_db_port = port.to_i

      end

      def self.set_trac_db_name(name)

        return nil if name.blank?

        @@trac_db_name = name

      end

      def self.set_trac_db_username(username)

        @@trac_db_username = username

      end

      def self.set_trac_db_password(password)

        @@trac_db_password = password

      end

      def self.set_trac_db_schema(schema)

        @@trac_db_schema = schema

      end

      mattr_reader :trac_directory, :trac_adapter, :trac_db_host, :trac_db_port, :trac_db_name, :trac_db_schema, :trac_db_username, :trac_db_password

      def self.trac_db_path; "#{trac_directory}/db/trac.db" end

      def self.trac_attachments_directory; "#{trac_directory}/attachments" end

      def self.target_project_identifier(identifier)

        project = Project.find_by_identifier(identifier)

        if !project

          # create the target project

          project = Project.new :name => identifier.humanize,

                                :description => ''

          project.identifier = identifier

          puts "Unable to create a project with identifier '#{identifier}'!" unless project.save

          # enable issues and wiki for the created project

          project.enabled_module_names = ['issue_tracking', 'wiki']

        else

          puts

          puts "This project already exists in your Redmine database."

          print "Are you sure you want to append data to this project ? [Y/n] "

          STDOUT.flush

          exit if STDIN.gets.match(/^n$/i)

        end

        project.trackers << TRACKER_BUG unless project.trackers.include?(TRACKER_BUG)

        project.trackers << TRACKER_FEATURE unless project.trackers.include?(TRACKER_FEATURE)

        @target_project = project.new_record? ? nil : project

        @target_project.reload

      end

      def self.connection_params

        if trac_adapter == 'sqlite3'

          {:adapter => 'sqlite3',

           :database => trac_db_path}

        else

          {:adapter => trac_adapter,

           :database => trac_db_name,

           :host => trac_db_host,

           :port => trac_db_port,

           :username => trac_db_username,

           :password => trac_db_password,

           :schema_search_path => trac_db_schema

          }

        end

      end

      def self.establish_connection

        constants.each do |const|

          klass = const_get(const)

          next unless klass.respond_to? 'establish_connection'

          klass.establish_connection connection_params

        end

      end

      def self.encode(text)

        text.to_s.force_encoding(@charset).encode('UTF-8')

      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: a new project will be added to Redmine during this process."

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

    STDOUT.flush

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

    puts

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

      default = options[:default] || ''

      while true

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

        STDOUT.flush

        value = STDIN.gets.chomp!

        value = default if value.blank?

        break if yield value

      end

    end

    DEFAULT_PORTS = {'mysql' => 3306, 'postgresql' => 5432}

    prompt('Trac directory') {|directory| TracMigrate.set_trac_directory directory.strip}

    prompt('Trac database adapter (sqlite3, mysql2, postgresql)', :default => 'sqlite3') {|adapter| TracMigrate.set_trac_adapter adapter}

    unless %w(sqlite3).include?(TracMigrate.trac_adapter)

      prompt('Trac database host', :default => 'localhost') {|host| TracMigrate.set_trac_db_host host}

      prompt('Trac database port', :default => DEFAULT_PORTS[TracMigrate.trac_adapter]) {|port| TracMigrate.set_trac_db_port port}

      prompt('Trac database name') {|name| TracMigrate.set_trac_db_name name}

      prompt('Trac database schema', :default => 'public') {|schema| TracMigrate.set_trac_db_schema schema}

      prompt('Trac database username') {|username| TracMigrate.set_trac_db_username username}

      prompt('Trac database password') {|password| TracMigrate.set_trac_db_password password}

    end

    prompt('Trac database encoding', :default => 'UTF-8') {|encoding| TracMigrate.encoding encoding}

    prompt('Target project identifier') {|identifier| TracMigrate.target_project_identifier identifier}

    puts

    old_notified_events = Setting.notified_events

    old_password_min_length = Setting.password_min_length

    begin

      # Turn off email notifications temporarily

      Setting.notified_events = []

      Setting.password_min_length = 4

      # Run the migration

      TracMigrate.migrate

    ensure

      # Restore previous settings

      Setting.notified_events = old_notified_events

      Setting.password_min_length = old_password_min_length

    end

  end

end