Rudder

In 20_cfe_basics/cfengine/packages.cf :

have_aptitude::
   package_add_command => "$(debian_knowledge.call_aptitude) $(debian_knowledge.dpkg_options) --assume-yes install";
   package_list_update_command => "/usr/bin/aptitude update";
   package_delete_command => "$(debian_knowledge.call_aptitude) $(debian_knowledge.dpkg_options) --assume-yes -q remove";
   package_update_command =>  "$(debian_knowledge.call_aptitude) $(debian_knowledge.dpkg_options) --assume-yes install";
   package_patch_command =>  "$(debian_knowledge.call_aptitude) $(debian_knowledge.dpkg_options) --assume-yes install";
   package_verify_command =>  "/usr/bin/aptitude show";
   package_noverify_regex => "(State: not installed|E: Unable to locate package .*)";

   package_patch_list_command => "/usr/bin/aptitude --assume-yes --simulate --verbose full-upgrade";
   package_patch_name_regex => "^Inst\s+(\S+)\s+.*";
   package_patch_version_regex => "^Inst\s+\S+\s+\[?\(?([^\],\s]+).*";

package_patch_list_command uses directly /usr/bin/aptitude instead of $(debian_knowledge.call_aptitude) (which adds the DEBIAN_FRONTEND=noninteractive env var).

This has been fixed in cfengine (3.5 and 3.6), we could update the ncf stdlib.