Poster of Linux kernelThe best gift for a Linux geek
Dpkg::Control::Fields

Dpkg::Control::Fields

Section: libdpkg-perl (3) Updated: 2011-03-01
Local index Up
 

NAME

Dpkg::Control::Fields - manage (list of official) control fields  

DESCRIPTION

The modules contains a list of fieldnames with associated meta-data explaining in which type of control information they are allowed. The types are the CTRL_* constants exported by Dpkg::Control.  

FUNCTIONS

my $f = field_capitalize($field_name)
Returns the field name properly capitalized. All characters are lowercase, except the first of each word (words are separated by a dash in field names).
field_is_official($fname)
Returns true if the field is official and known.
field_is_allowed_in($fname, @types)
Returns true (1) if the field $fname is allowed in all the types listed in the list. Note that you can use type sets instead of individual types (ex: CTRL_FILE_CHANGES | CTRL_CHANGELOG).

field_allowed_in(A|B, C) returns true only if the field is allowed in C and either A or B.

Undef is returned for non-official fields.

field_transfer_single($from, $to, $field)
If appropriate, copy the value of the field named $field taken from the $from Dpkg::Control object to the $to Dpkg::Control object.

Official fields are copied only if the field is allowed in both types of objects. Custom fields are treated in a specific manner. When the target is not among CTRL_PKG_SRC, CTRL_PKG_DEB or CTRL_FILE_CHANGES, then they are alway copied as is (the X- prefix is kept). Otherwise they are not copied except if the target object matches the target destination encoded in the field name. The initial X denoting custom fields can be followed by one or more letters among ``S'' (Source: corresponds to CTRL_PKG_SRC), ``B'' (Binary: corresponds to CTRL_PKG_DEB) or ``C'' (Changes: corresponds to CTRL_FILE_CHANGES).

Returns undef if nothing has been copied or the name of the new field added to $to otherwise.

field_transfer_all($from, $to)
Transfer all appropriate fields from $from to $to. Calls field_transfer_single() on all fields available in $from.

Returns the list of fields that have been added to $to.

field_ordered_list($type)
Returns an ordered list of fields for a given type of control information. This list can be used to output the fields in a predictable order. The list might be empty for types where the order does not matter much.
field_list_src_dep()
List of fields that contains dependencies-like information in a source Debian package.
field_list_pkg_dep()
List of fields that contains dependencies-like information in a binary Debian package. The fields that express real dependencies are sorted from the stronger to the weaker.
field_get_dep_type($field)
Return the type of the dependency expressed by the given field. Can either be ``normal'' for a real dependency field (Pre-Depends, Depends, ...) or ``union'' for other relation fields sharing the same syntax (Conflicts, Breaks, ...). Returns undef for fields which are not dependencies.
field_register($field, $allowed_types, %opts)
Register a new field as being allowed in control information of specified types. %opts is optional
field_insert_after($type, $ref, @fields)
Place field after another one ($ref) in output of control information of type $type.
field_insert_before($type, $ref, @fields)
Place field before another one ($ref) in output of control information of type $type.
 

AUTHOR

Raphaël Hertzog <hertzog@debian.org>.


 

Index

NAME
DESCRIPTION
FUNCTIONS
AUTHOR

This document was created by man2html, using the manual pages.
Time: 21:45:12 GMT, April 16, 2011