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# Redmine - project management software

# Copyright (C) 2006-2011  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'

module Redmine

  module Scm

    module Adapters

      class BazaarAdapter < AbstractAdapter

        # Bazaar executable name

        BZR_BIN = Redmine::Configuration['scm_bazaar_command'] || "bzr"

        class << self

          def client_command

            @@bin    ||= BZR_BIN

          end

          def sq_bin

            @@sq_bin ||= shell_quote_command

          end

          def client_version

            @@client_version ||= (scm_command_version || [])

          end

          def client_available

            !client_version.empty?

          end

          def scm_command_version

            scm_version = scm_version_from_command_line.dup

            if scm_version.respond_to?(:force_encoding)

              scm_version.force_encoding('ASCII-8BIT')

            end

            if m = scm_version.match(%r{\A(.*?)((\d+\.)+\d+)})

              m[2].scan(%r{\d+}).collect(&:to_i)

            end

          end

          def scm_version_from_command_line

            shellout("#{sq_bin} --version") { |io| io.read }.to_s

          end

        end

        # Get info about the repository

        def info

          cmd_args = %w|revno|

          cmd_args << bzr_target('')

          info = nil

          scm_cmd(*cmd_args) do |io|

            if io.read =~ %r{^(\d+)\r?$}

              info = Info.new({:root_url => url,

                               :lastrev => Revision.new({

                                 :identifier => $1

                               })

                             })

            end

          end

          info

        rescue ScmCommandAborted

          return nil

        end

        # Returns an Entries collection

        # or nil if the given path doesn't exist in the repository

        def entries(path=nil, identifier=nil, options={})

          path ||= ''

          entries = Entries.new

          identifier = -1 unless identifier && identifier.to_i > 0

          cmd_args = %w|ls -v --show-ids|

          cmd_args << "-r#{identifier.to_i}"

          cmd_args << bzr_target(path)

          scm_cmd(*cmd_args) do |io|

            prefix = "#{url}/#{path}".gsub('\\', '/')

            logger.debug "PREFIX: #{prefix}"

            re = %r{^V\s+(#{Regexp.escape(prefix)})?(\/?)([^\/]+)(\/?)\s+(\S+)\r?$}

            io.each_line do |line|

              next unless line =~ re

              entries << Entry.new({:name => $3.strip,

                                    :path => ((path.empty? ? "" : "#{path}/") + $3.strip),

                                    :kind => ($4.blank? ? 'file' : 'dir'),

                                    :size => nil,

                                    :lastrev => Revision.new(:revision => $5.strip)

                                  })

            end

          end

          if logger && logger.debug?

            logger.debug("Found #{entries.size} entries in the repository for #{target(path)}")

          end

          entries.sort_by_name

        rescue ScmCommandAborted

          return nil

        end

        def revisions(path=nil, identifier_from=nil, identifier_to=nil, options={})

          path ||= ''

          identifier_from = (identifier_from and identifier_from.to_i > 0) ? identifier_from.to_i : 'last:1'

          identifier_to = (identifier_to and identifier_to.to_i > 0) ? identifier_to.to_i : 1

          revisions = Revisions.new

          cmd_args = %w|log -v --show-ids|

          cmd_args << "-r#{identifier_to}..#{identifier_from}"

          cmd_args << bzr_target(path)

          scm_cmd(*cmd_args) do |io|

            revision = nil

            parsing  = nil

            io.each_line do |line|

              if line =~ /^----/

                revisions << revision if revision

                revision = Revision.new(:paths => [], :message => '')

                parsing = nil

              else

                next unless revision

                if line =~ /^revno: (\d+)($|\s\[merge\]$)/

                  revision.identifier = $1.to_i

                elsif line =~ /^committer: (.+)$/

                  revision.author = $1.strip

                elsif line =~ /^revision-id:(.+)$/

                  revision.scmid = $1.strip

                elsif line =~ /^timestamp: (.+)$/

                  revision.time = Time.parse($1).localtime

                elsif line =~ /^    -----/

                  # partial revisions

                  parsing = nil unless parsing == 'message'

                elsif line =~ /^(message|added|modified|removed|renamed):/

                  parsing = $1

                elsif line =~ /^  (.*)$/

                  if parsing == 'message'

                    revision.message << "#{$1}\n"

                  else

                    if $1 =~ /^(.*)\s+(\S+)$/

                      path = $1.strip

                      revid = $2

                      case parsing

                      when 'added'

                        revision.paths << {:action => 'A', :path => "/#{path}", :revision => revid}

                      when 'modified'

                        revision.paths << {:action => 'M', :path => "/#{path}", :revision => revid}

                      when 'removed'

                        revision.paths << {:action => 'D', :path => "/#{path}", :revision => revid}

                      when 'renamed'

                        new_path = path.split('=>').last

                        revision.paths << {:action => 'M', :path => "/#{new_path.strip}", :revision => revid} if new_path

                      end

                    end

                  end

                else

                  parsing = nil

                end

              end

            end

            revisions << revision if revision

          end

          revisions

        rescue ScmCommandAborted

          return nil

        end

        def diff(path, identifier_from, identifier_to=nil)

          path ||= ''

          if identifier_to

            identifier_to = identifier_to.to_i

          else

            identifier_to = identifier_from.to_i - 1

          end

          if identifier_from

            identifier_from = identifier_from.to_i

          end

          diff = []

          cmd_args = %w|diff|

          cmd_args << "-r#{identifier_to}..#{identifier_from}"

          cmd_args << bzr_target(path)

          scm_cmd_no_raise(*cmd_args) do |io|

            io.each_line do |line|

              diff << line

            end

          end

          diff

        end

        def cat(path, identifier=nil)

          cat = nil

          cmd_args = %w|cat|

          cmd_args << "-r#{identifier.to_i}" if identifier && identifier.to_i > 0

          cmd_args << bzr_target(path)

          scm_cmd(*cmd_args) do |io|

            io.binmode

            cat = io.read

          end

          cat

        rescue ScmCommandAborted

          return nil

        end

        def annotate(path, identifier=nil)

          blame = Annotate.new

          cmd_args = %w|annotate -q --all|

          cmd_args << "-r#{identifier.to_i}" if identifier && identifier.to_i > 0

          cmd_args << bzr_target(path)

          scm_cmd(*cmd_args) do |io|

            author     = nil

            identifier = nil

            io.each_line do |line|

              next unless line =~ %r{^(\d+) ([^|]+)\| (.*)$}

              rev = $1

              blame.add_line($3.rstrip,

                 Revision.new(

                  :identifier => rev,

                  :revision   => rev,

                  :author     => $2.strip

                  ))

            end

          end

          blame

        rescue ScmCommandAborted

          return nil

        end

        def self.branch_conf_path(path)

          bcp = nil

          m = path.match(%r{^(.*[/\\])\.bzr.*$})

          if m

            bcp = m[1]

          else

            bcp = path

          end

          bcp.gsub!(%r{[\/\\]$}, "")

          if bcp

            bcp = File.join(bcp, ".bzr", "branch", "branch.conf")

          end

          bcp

        end

        def append_revisions_only

          return @aro if ! @aro.nil?

          @aro = false

          bcp = self.class.branch_conf_path(url)

          if bcp && File.exist?(bcp)

            begin

              f = File::open(bcp, "r")

              cnt = 0

              f.each_line do |line|

                l = line.chomp.to_s

                if l =~ /^\s*append_revisions_only\s*=\s*(\w+)\s*$/

                  str_aro = $1

                  if str_aro.upcase == "TRUE"

                    @aro = true

                    cnt += 1

                  elsif str_aro.upcase == "FALSE"

                    @aro = false

                    cnt += 1

                  end

                  if cnt > 1

                    @aro = false

                    break

                  end

                end

              end

            ensure

              f.close

            end

          end

          @aro

        end

        def scm_cmd(*args, &block)

          full_args = []

          full_args += args

          ret = shellout(

                   self.class.sq_bin + ' ' + full_args.map { |e| shell_quote e.to_s }.join(' '),

                   &block

                   )

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

            raise ScmCommandAborted, "bzr exited with non-zero status: #{$?.exitstatus}"

          end

          ret

        end

        private :scm_cmd

        def scm_cmd_no_raise(*args, &block)

          full_args = []

          full_args += args

          ret = shellout(

                   self.class.sq_bin + ' ' + full_args.map { |e| shell_quote e.to_s }.join(' '),

                   &block

                   )

          ret

        end

        private :scm_cmd_no_raise

        def bzr_target(path)

          target(path, false)

        end

        private :bzr_target

      end

    end

  end

end