# pin a release in apt, useful for unstable repositories
define apt::pin(
- $packages = '*',
- $priority = 0
+ $ensure = present,
+ $explanation = "${caller_module_name}: ${name}",
+ $order = '',
+ $packages = '*',
+ $priority = 0,
+ $release = '', # a=
+ $origin = '',
+ $version = '',
+ $codename = '', # n=
+ $release_version = '', # v=
+ $component = '', # c=
+ $originator = '', # o=
+ $label = '' # l=
) {
include apt::params
$preferences_d = $apt::params::preferences_d
- file { "${name}.pref":
- ensure => file,
- path => "${preferences_d}/${name}",
+ if $order != '' and !is_integer($order) {
+ fail('Only integers are allowed in the apt::pin order param')
+ }
+
+ $pin_release_array = [
+ $release,
+ $codename,
+ $release_version,
+ $component,
+ $originator,
+ $label]
+ $pin_release = join($pin_release_array, '')
+
+ # Read the manpage 'apt_preferences(5)', especially the chapter
+ # 'Thea Effect of APT Preferences' to understand the following logic
+ # and the difference between specific and general form
+ if is_array($packages) {
+ $packages_string = join($packages, ' ')
+ } else {
+ $packages_string = $packages
+ }
+
+ if $packages_string != '*' { # specific form
+
+ if ( $pin_release != '' and ( $origin != '' or $version != '' )) or
+ ( $origin != '' and ( $pin_release != '' or $version != '' )) or
+ ( $version != '' and ( $pin_release != '' or $origin != '' )) {
+ fail('parameters release, origin, and version are mutually exclusive')
+ }
+
+ } else { # general form
+
+ if $version != '' {
+ fail('parameter version cannot be used in general form')
+ }
+
+ if ( $pin_release != '' and $origin != '' ) or
+ ( $origin != '' and $pin_release != '' ) {
+ fail('parmeters release and origin are mutually exclusive')
+ }
+
+ }
+
+
+ # According to man 5 apt_preferences:
+ # The files have either no or "pref" as filename extension
+ # and only contain alphanumeric, hyphen (-), underscore (_) and period
+ # (.) characters. Otherwise APT will print a notice that it has ignored a
+ # file, unless that file matches a pattern in the
+ # Dir::Ignore-Files-Silently configuration list - in which case it will
+ # be silently ignored.
+ $file_name = regsubst($title, '[^0-9a-z\-_\.]', '_', 'IG')
+
+ $path = $order ? {
+ '' => "${preferences_d}/${file_name}.pref",
+ default => "${preferences_d}/${order}-${file_name}.pref",
+ }
+ file { "${file_name}.pref":
+ ensure => $ensure,
+ path => $path,
owner => root,
group => root,
mode => '0644',
- content => "# ${name}\nPackage: ${packages}\nPin: release a=${name}\nPin-Priority: ${priority}",
+ content => template('apt/pin.pref.erb'),
}
}