scm: mercurial: accept both of revision and nodeid as changeset id (#3724).

Contributed by Yuya Nishihara.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4654 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/repository/mercurial.rb

@@ -55,6 +55,17 @@ class Repository::Mercurial < Repository
     entries
   end
 
+  # Finds and returns a revision with a number or the beginning of a hash
+  def find_changeset_by_name(name)
+    if /[^\d]/ =~ name or name.to_s.size > 8
+      e = changesets.find(:first, :conditions => ['scmid = ?', name.to_s])
+    else
+      e = changesets.find(:first, :conditions => ['revision = ?', name.to_s])
+    end
+    return e if e
+    changesets.find(:first, :conditions => ['scmid LIKE ?', "#{name}%"])  # last ditch
+  end
+
   # Returns the latest changesets for +path+; sorted by revision number
   def latest_changesets(path, rev, limit=10)
     if path.blank?