oracular (3) Dpkg::Changelog.3perl.gz
NAME
Dpkg::Changelog - base class to implement a changelog parser
DESCRIPTION
Dpkg::Changelog is a class representing a changelog file as an array of changelog entries
(Dpkg::Changelog::Entry). By deriving this class and implementing its parse() method, you add the
ability to fill this object with changelog entries.
METHODS
$c = Dpkg::Changelog->new(%options)
Creates a new changelog object.
$c->set_options(%opts)
Change the value of some options. "verbose" (defaults to 1) defines whether parse errors are
displayed as warnings by default. "reportfile" is a string to use instead of the name of the file
parsed, in particular in error messages. "range" defines the range of entries that we want to parse,
the parser will stop as soon as it has parsed enough data to satisfy $c->get_range($opts{range}).
$count = $c->parse($fh, $description)
Read the filehandle and parse a changelog in it. The data in the object is reset before parsing new
data.
Returns the number of changelog entries that have been parsed with success.
This method needs to be implemented by one of the specialized changelog format subclasses.
$count = $c->load($filename)
Parse $filename contents for a changelog.
Returns the number of changelog entries that have been parsed with success.
$c->reset_parse_errors()
Can be used to delete all information about errors occurred during previous parse() runs.
$c->parse_error($file, $line_nr, $error, [$line])
Record a new parse error in $file at line $line_nr. The error message is specified with $error and a
copy of the line can be recorded in $line.
$c->get_parse_errors()
Returns all error messages from the last parse() run. If called in scalar context returns a human
readable string representation. If called in list context returns an array of arrays. Each of these
arrays contains
1. a string describing the origin of the data (a filename usually). If the reportfile configuration
option was given, its value will be used instead.
2. the line number where the error occurred
3. an error description
4. the original line
$c->set_unparsed_tail($tail)
Add a string representing unparsed lines after the changelog entries. Use undef as $tail to remove
the unparsed lines currently set.
$c->get_unparsed_tail()
Return a string representing the unparsed lines after the changelog entries. Returns undef if there's
no such thing.
@{$c}
Returns all the Dpkg::Changelog::Entry objects contained in this changelog in the order in which they
have been parsed.
$c->get_range($range)
Returns an array (if called in list context) or a reference to an array of Dpkg::Changelog::Entry
objects which each represent one entry of the changelog. $range is a hash reference describing the
range of entries to return. See section "RANGE SELECTION".
$c->abort_early()
Returns true if enough data have been parsed to be able to return all entries selected by the range
set at creation (or with set_options).
$str = $c->output()
"$c"
Returns a string representation of the changelog (it's a concatenation of the string representation
of the individual changelog entries).
$c->output($fh)
Output the changelog to the given filehandle.
$c->save($filename)
Save the changelog in the given file.
$control = $c->format_range($format, $range)
Formats the changelog into Dpkg::Control::Changelog objects representing the entries selected by the
optional range specifier (see "RANGE SELECTION" for details). In scalar context returns a Dpkg::Index
object containing the selected entries, in list context returns an array of Dpkg::Control::Changelog
objects.
With format dpkg the returned Dpkg::Control::Changelog object is coalesced from the entries in the
changelog that are part of the range requested, with the fields described below, but considering that
"selected entry" means the first entry of the selected range.
With format rfc822 each returned Dpkg::Control::Changelog objects represents one entry in the
changelog that is part of the range requested, with the fields described below, but considering that
"selected entry" means for each entry.
The different formats return undef if no entries are matched. The following fields are contained in
the object(s) returned:
Source
package name (selected entry)
Version
packages' version (selected entry)
Distribution
target distribution (selected entry)
Urgency
urgency (highest of all entries in range)
Maintainer
person that created the (selected) entry
Date
date of the (selected) entry
Timestamp
date of the (selected) entry as a timestamp in seconds since the epoch
Closes
bugs closed by the (selected) entry/entries, sorted by bug number
Changes
content of the (selected) entry/entries
RANGE SELECTION
A range selection is described by a hash reference where the allowed keys and values are described below.
The following options take a version number as value.
since
Causes changelog information from all versions strictly later than version to be used.
until
Causes changelog information from all versions strictly earlier than version to be used.
from
Similar to "since" but also includes the information for the specified version itself.
to Similar to "until" but also includes the information for the specified version itself.
The following options don't take version numbers as values:
all If set to a true value, all entries of the changelog are returned, this overrides all other options.
count
Expects a signed integer as value. Returns "value" entries from the top of the changelog if set to a
positive integer, and abs(value) entries from the tail if set to a negative integer.
offset
Expects a signed integer as value. Changes the starting point for "count", either counted from the
top (positive integer) or from the tail (negative integer). "offset" has no effect if "count" wasn't
given as well.
Some examples for the above options. Imagine an example changelog with entries for the versions 1.2, 1.3,
2.0, 2.1, 2.2, 3.0 and 3.1.
Range Included entries
----- ----------------
since => '2.0' 3.1, 3.0, 2.2
until => '2.0' 1.3, 1.2
from => '2.0' 3.1, 3.0, 2.2, 2.1, 2.0
to => '2.0' 2.0, 1.3, 1.2
count => 2 3.1, 3.0
count => -2 1.3, 1.2
count => 3, offset => 2 2.2, 2.1, 2.0
count => 2, offset => -3 2.0, 1.3
count => -2, offset => 3 3.0, 2.2
count => -2, offset => -3 2.2, 2.1
Any combination of one option of "since" and "from" and one of "until" and "to" returns the intersection
of the two results with only one of the options specified.
CHANGES
Version 2.00 (dpkg 1.20.0)
Remove methods: $c->dpkg(), $c->rfc822().
Version 1.01 (dpkg 1.18.8)
New method: $c->format_range().
Deprecated methods: $c->dpkg(), $c->rfc822().
New field Timestamp in output formats.
Version 1.00 (dpkg 1.15.6)
Mark the module as public.