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Dpkg::Index(3perl)		 libdpkg-perl		    Dpkg::Index(3perl)

       Dpkg::Index - generic index of control information

       This object represent a set of Dpkg::Control objects.

       $index =	Dpkg::Index->new(%opts)
	   Creates a new empty index. See set_options()	for more details.

	   The "type" option is	checked	first to define	default	values for
	   other options. Here are the relevant	options: "get_key_func"	is a
	   function returning a	key for	the item passed	in parameters,
	   "unique_tuple_key" is a boolean requesting whether the default key
	   should be the unique	tuple (default to false	for backwards
	   compatibility, but it will change to	true in	dpkg 1.20.x). The
	   index can only contain one item with	a given	key.  The
	   "get_key_func" function used	depends	on the type:

	   o   for CTRL_INFO_SRC, it is	the Source field;

	   o   for CTRL_INDEX_SRC and CTRL_PKG_SRC it is the Package field by
	       default,	or the Package and Version fields (concatenated	with
	       "_") when "unique_tuple_key" is true;

	   o   for CTRL_INFO_PKG it is simply the Package field;

	   o   for CTRL_INDEX_PKG and CTRL_PKG_DEB it is the Package field by
	       default,	or the Package,	Version	and Architecture fields
	       (concatenated with "_") when "unique_tuple_key" is true;

	   o   for CTRL_CHANGELOG it is	the Source and the Version fields
	       (concatenated with an intermediary "_");

	   o   for CTRL_TESTS is either	the Tests or Test-Command fields;

	   o   for CTRL_FILE_CHANGES it	is the Source, Version and
	       Architecture fields (concatenated with "_");

	   o   for CTRL_FILE_VENDOR it is the Vendor field;

	   o   for CTRL_FILE_STATUS it is the Package and Architecture fields
	       (concatenated with "_");

	   o   otherwise it is the Package field by default.

	   Returns the type of control information stored. See the type
	   parameter set during	new().

       $index->add($item, [$key])
	   Add a new item in the index.	If the $key parameter is omitted, the
	   key will be generated with the get_key_func function	(see
	   set_options() for details).

       $index->parse($fh, $desc)
	   Reads the filehandle	and creates all	items parsed. When called
	   multiple times, the parsed stanzas are accumulated.

	   Returns the number of items parsed.

	   Reads the file and creates all items	parsed.	Returns	the number of
	   items parsed. Handles compressed files transparently	based on their

       $item = $index->new_item()
	   Creates a new item. Mainly useful for derived objects that would
	   want	to override this method	to return something else than a
	   Dpkg::Control object.

       $item = $index->get_by_key($key)
	   Returns the item identified by $key or undef.

       @keys = $index->get_keys(%criteria)
	   Returns the keys of items that matches all the criteria. The	key of
	   the %criteria hash is a field name and the value is either a	regex
	   that	needs to match the field value,	or a reference to a function
	   that	must return true and that receives the field value as single
	   parameter, or a scalar that must be equal to	the field value.

       @items =	$index->get(%criteria)
	   Returns all the items that matches all the criteria.

	   Remove the item identified by the given key.

       @items =	$index->remove(%criteria)
	   Returns and removes all the items that matches all the criteria.

       $index->merge($other_index, %opts)
	   Merge the entries of	the other index. While merging,	the keys of
	   the merged index are	used, they are not re-computed (unless you
	   have	set the	options	"keep_keys" to "0"). It's your responsibility
	   to ensure that they have been computed with the same	function.

	   Sort	the index with the given sort function.	If no function is
	   given, an alphabetic	sort is	done based on the keys.	The sort
	   function receives the items themselves as parameters	and not	the

       $str = $index->output([$fh])
	   Get a string	representation of the index. The Dpkg::Control objects
	   are output in the order which they have been	read or	added except
	   if the order	have been changed with sort().

	   Print the string representation of the index	to a filehandle	if $fh
	   has been passed.

	   Writes the content of the index in a	file. Auto-compresses files
	   based on their extensions.

   Version 1.01	(dpkg 1.19.0)
       New option: Add new "unique_tuple_key" option to	$index->set_options()
       to set better default "get_key_func" options, which will	become the
       default behavior	in 1.20.x.

   Version 1.00	(dpkg 1.15.6)
       Mark the	module as public.

1.19.7				  2019-04-19		    Dpkg::Index(3perl)


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