Dpkg::Control::FieldsCore - manage (list of official) control fields
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.
- $f = field_capitalize($field_name)
- Returns the field name properly capitalized. All characters are lowercase, except the first of each word (words are separated by a hyphen in field names).
- 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 always 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 $to.
- Returns an ordered list of fields for a given type of control information. This list can be used to output the fields in a predictable order. The list might be empty for types where the order does not matter much.
- List of fields that contains dependencies-like information in a source Debian package.
- List of fields that contains dependencies-like information in a binary Debian package. The fields that express real dependencies are sorted from the stronger to the weaker.
- Return the type of the dependency expressed by the given field. Can either be "normal" for a real dependency field (Pre-Depends, Depends, ...) or "union" for other relation fields sharing the same syntax (Conflicts, Breaks, ...). Returns undef for fields which are not dependencies.
- Return the type of the field value separator. Can be one of FIELD_SEP_UNKNOWN, FIELD_SEP_SPACE, FIELD_SEP_COMMA or FIELD_SEP_LINE.
- field_register($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.
Version 1.00 (dpkg 1.17.0)¶
Mark the module as public.