Chris@909: # Redmine - project management software
Chris@909: # Copyright (C) 2006-2011  Jean-Philippe Lang
Chris@909: #
Chris@909: # This program is free software; you can redistribute it and/or
Chris@909: # modify it under the terms of the GNU General Public License
Chris@909: # as published by the Free Software Foundation; either version 2
Chris@909: # of the License, or (at your option) any later version.
Chris@909: #
Chris@909: # This program is distributed in the hope that it will be useful,
Chris@909: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@909: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@909: # GNU General Public License for more details.
Chris@909: #
Chris@909: # You should have received a copy of the GNU General Public License
Chris@909: # along with this program; if not, write to the Free Software
Chris@909: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@909: 
Chris@909: require 'redmine/scm/adapters/mercurial_adapter'
Chris@909: 
Chris@909: class Repository::Mercurial < Repository
Chris@909:   # sort changesets by revision number
Chris@909:   has_many :changesets,
Chris@909:            :order       => "#{Changeset.table_name}.id DESC",
Chris@909:            :foreign_key => 'repository_id'
Chris@909: 
Chris@909:   attr_protected        :root_url
Chris@909:   validates_presence_of :url
Chris@909: 
Chris@909:   # number of changesets to fetch at once
Chris@909:   FETCH_AT_ONCE = 100
Chris@909: 
Chris@909:   def self.human_attribute_name(attribute_key_name)
Chris@909:     attr_name = attribute_key_name
Chris@909:     if attr_name == "url"
Chris@909:       attr_name = "path_to_repository"
Chris@909:     end
Chris@909:     super(attr_name)
Chris@909:   end
Chris@909: 
Chris@909:   def self.scm_adapter_class
Chris@909:     Redmine::Scm::Adapters::MercurialAdapter
Chris@909:   end
Chris@909: 
Chris@909:   def self.scm_name
Chris@909:     'Mercurial'
Chris@909:   end
Chris@909: 
Chris@909:   def supports_directory_revisions?
Chris@909:     true
Chris@909:   end
Chris@909: 
Chris@909:   def supports_revision_graph?
Chris@909:     true
Chris@909:   end
Chris@909: 
Chris@909:   def repo_log_encoding
Chris@909:     'UTF-8'
Chris@909:   end
Chris@909: 
Chris@909:   # Returns the readable identifier for the given mercurial changeset
Chris@909:   def self.format_changeset_identifier(changeset)
Chris@909:     "#{changeset.revision}:#{changeset.scmid}"
Chris@909:   end
Chris@909: 
Chris@909:   # Returns the identifier for the given Mercurial changeset
Chris@909:   def self.changeset_identifier(changeset)
Chris@909:     changeset.scmid
Chris@909:   end
Chris@909: 
Chris@909:   def diff_format_revisions(cs, cs_to, sep=':')
Chris@909:     super(cs, cs_to, ' ')
Chris@909:   end
Chris@909: 
Chris@909:   # Finds and returns a revision with a number or the beginning of a hash
Chris@909:   def find_changeset_by_name(name)
Chris@909:     return nil if name.nil? || name.empty?
Chris@909:     if /[^\d]/ =~ name or name.to_s.size > 8
Chris@909:       e = changesets.find(:first, :conditions => ['scmid = ?', name.to_s])
Chris@909:     else
Chris@909:       e = changesets.find(:first, :conditions => ['revision = ?', name.to_s])
Chris@909:     end
Chris@909:     return e if e
Chris@909:     changesets.find(:first, :conditions => ['scmid LIKE ?', "#{name}%"])  # last ditch
Chris@909:   end
Chris@909: 
Chris@909:   # Returns the latest changesets for +path+; sorted by revision number
Chris@909:   #
Chris@909:   # Because :order => 'id DESC' is defined at 'has_many',
Chris@909:   # there is no need to set 'order'.
Chris@909:   # But, MySQL test fails.
Chris@909:   # Sqlite3 and PostgreSQL pass.
Chris@909:   # Is this MySQL bug?
Chris@909:   def latest_changesets(path, rev, limit=10)
Chris@909:     changesets.find(:all,
Chris@909:                     :include    => :user,
Chris@909:                     :conditions => latest_changesets_cond(path, rev, limit),
Chris@909:                     :limit      => limit,
Chris@909:                     :order      => "#{Changeset.table_name}.id DESC")
Chris@909:   end
Chris@909: 
Chris@909:   def latest_changesets_cond(path, rev, limit)
Chris@909:     cond, args = [], []
Chris@909:     if scm.branchmap.member? rev
Chris@909:       # Mercurial named branch is *stable* in each revision.
Chris@909:       # So, named branch can be stored in database.
Chris@909:       # Mercurial provides *bookmark* which is equivalent with git branch.
Chris@909:       # But, bookmark is not implemented.
Chris@909:       cond << "#{Changeset.table_name}.scmid IN (?)"
Chris@909:       # Revisions in root directory and sub directory are not equal.
Chris@909:       # So, in order to get correct limit, we need to get all revisions.
Chris@909:       # But, it is very heavy.
Chris@909:       # Mercurial does not treat direcotry.
Chris@909:       # So, "hg log DIR" is very heavy.
Chris@909:       branch_limit = path.blank? ? limit : ( limit * 5 )
Chris@909:       args << scm.nodes_in_branch(rev, :limit => branch_limit)
Chris@909:     elsif last = rev ? find_changeset_by_name(scm.tagmap[rev] || rev) : nil
Chris@909:       cond << "#{Changeset.table_name}.id <= ?"
Chris@909:       args << last.id
Chris@909:     end
Chris@909:     unless path.blank?
Chris@909:       cond << "EXISTS (SELECT * FROM #{Change.table_name}
Chris@909:                  WHERE #{Change.table_name}.changeset_id = #{Changeset.table_name}.id
Chris@909:                  AND (#{Change.table_name}.path = ?
Chris@909:                        OR #{Change.table_name}.path LIKE ? ESCAPE ?))"
Chris@909:       args << path.with_leading_slash
Chris@909:       args << "#{path.with_leading_slash.gsub(%r{[%_\\]}) { |s| "\\#{s}" }}/%" << '\\'
Chris@909:     end
Chris@909:     [cond.join(' AND '), *args] unless cond.empty?
Chris@909:   end
Chris@909:   private :latest_changesets_cond
Chris@909: 
Chris@909:   def fetch_changesets
Chris@909:     return if scm.info.nil?
Chris@909:     scm_rev = scm.info.lastrev.revision.to_i
Chris@909:     db_rev  = latest_changeset ? latest_changeset.revision.to_i : -1
Chris@909:     return unless db_rev < scm_rev  # already up-to-date
Chris@909: 
Chris@909:     logger.debug "Fetching changesets for repository #{url}" if logger
Chris@909:     (db_rev + 1).step(scm_rev, FETCH_AT_ONCE) do |i|
Chris@909:       transaction do
Chris@909:         scm.each_revision('', i, [i + FETCH_AT_ONCE - 1, scm_rev].min) do |re|
Chris@909:           cs = Changeset.create(:repository   => self,
Chris@909:                                 :revision     => re.revision,
Chris@909:                                 :scmid        => re.scmid,
Chris@909:                                 :committer    => re.author,
Chris@909:                                 :committed_on => re.time,
Chris@909:                                 :comments     => re.message)
Chris@909:           re.paths.each { |e| cs.create_change(e) }
Chris@909:           parents = {}
Chris@909:           parents[cs] = re.parents unless re.parents.nil?
Chris@909:           parents.each do |ch, chparents|
Chris@909:             ch.parents = chparents.collect{|rp| find_changeset_by_name(rp)}.compact
Chris@909:           end
Chris@909:         end
Chris@909:       end
Chris@909:     end
Chris@909:   end
Chris@909: end