NAME

       deb-triggers - package triggers

SYNOPSIS

       triggers

DESCRIPTION

       A  package  declares  its  relationship  to  some  trigger(s) by including a triggers file in its control
       archive (i.e. DEBIAN/triggers during package creation).

       This file contains directives, one per line. Leading and trailing whitespace  and  everything  after  the
       first # on any line will be trimmed, and empty lines will be ignored.

       The trigger control directives currently supported are:

       interest trigger-name
       interest-await trigger-name
       interest-noawait trigger-name

              Specifies  that the package is interested in the named trigger. All triggers in which a package is
              interested must be listed using this directive in the triggers control file. The “noawait” variant
              does not put the triggering packages in triggers-awaited state.  This  should  be  used  when  the
              functionality provided by the trigger is not crucial.

       activate trigger-name
       activate-await trigger-name
       activate-noawait trigger-name

              Arranges  that  changes  to  this package's state will activate the specified trigger. The trigger
              will be activated at the start of the following operations: unpack, configure,  remove  (including
              for  the benefit of a conflicting package), purge and deconfigure.  The “noawait” variant does not
              put the triggering packages in triggers-awaited state. This should be used when the  functionality
              provided by the trigger is not crucial.

              If  this  package disappears during the unpacking of another package the trigger will be activated
              when the disappearance is noted towards the end of the unpack. Trigger processing, and  transition
              from  triggers-awaited  to installed, does not cause activations.  In the case of unpack, triggers
              mentioned in both the old and new versions of the package will be activated.

       Unknown directives are an error which will prevent installation of the package.

       The “-noawait” variants should always be favored when possible since triggering packages are not  put  in
       triggers-awaited  state  and  can  thus be immediately configured without requiring the processing of the
       trigger.  If the triggering packages are dependencies of other upgraded packages, it will avoid an  early
       trigger  processing run and make it possible to run the trigger only once as one of the last steps of the
       upgrade.

       The “-noawait” variants are supported since dpkg 1.16.1, and will lead to errors if used  with  an  older
       dpkg.

       The  “-await”  alias  variants  are supported since dpkg 1.17.21, and will lead to errors if used with an
       older dpkg.

SEE ALSO

       dpkg-trigger(1), dpkg(1), /usr/share/doc/dpkg-dev/triggers.txt.gz.

1.19.0.5                                           2022-05-25                                    deb-triggers(5)