[api] log reason why a channel got added

yes, the parameters should become a hash...

src/api/app/models/channel.rb

@@ -132,16 +132,16 @@ def update_from_xml(xmlhash)
     save
   end
 
-  def branch_channel_package_into_project(project)
+  def branch_channel_package_into_project(project, comment=nil)
     cp = self.package
 
     # create a package container
     tpkg = Package.new(:name => self.name, :title => cp.title, :description => cp.description)
     project.packages << tpkg
-    tpkg.store
+    tpkg.store({comment: comment})
 
     # branch sources
-    tpkg.branch_from(cp.project.name, cp.name)
+    tpkg.branch_from(cp.project.name, cp.name, nil, nil, comment)
     tpkg.sources_changed
 
     tpkg

src/api/app/models/channel_binary.rb

@@ -19,15 +19,15 @@ def self.find_by_project_and_package(project, package)
     ChannelBinary.find_by_sql(['SELECT channel_binaries.* FROM channel_binaries LEFT JOIN channel_binary_lists ON channel_binary_lists.id = channel_binaries.channel_binary_list_id LEFT JOIN channels ON channel_binary_lists.channel_id = channels.id LEFT JOIN packages ON channels.package_id = packages.id WHERE (channel_binary_lists.project_id = ? and package = ? and packages.project_id IN (?))', project.id, package, maintained_projects])
   end
 
-  def create_channel_package_into(project)
+  def create_channel_package_into(project, comment=nil)
 
     channel = self.channel_binary_list.channel
 
     # does it exist already? then just skip it
     return nil if Package.exists_by_project_and_name(project.name, channel.name, follow_project_links: false, allow_remote_packages: false)
 
     # create a channel package beside my package and return that
-    return channel.branch_channel_package_into_project(project)
+    return channel.branch_channel_package_into_project(project, comment)
   end
 
   def to_axml_id(opts={})

src/api/app/models/package.rb

@@ -819,7 +819,7 @@ def add_channels(mode=nil)
     # main package
     ChannelBinary.find_by_project_and_package(project_name, opkg.name).each do |cb|
       next if mode == :skip_disabled and not cb.channel_binary_list.channel.is_active?
-      cpkg = cb.create_channel_package_into(self.project)
+      cpkg = cb.create_channel_package_into(self.project, "Listed in #{project_name} #{opkg.name}")
       next unless cpkg
       cpkg.channels.first.add_channel_repos_to_project(cpkg, mode)
     end