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 object and
implementing its parse method, you add the ability to fill this object with
changelog entries.
FUNCTIONS¶
- my $c = Dpkg::Changelog->new(%options)
- Creates a new changelog object.
- $c->load($filename)
- Parse $filename as a changelog.
- $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}).
- $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).
- $c->save($filename)
- Save the changelog in the given file.
- $c->output()
- "$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.
- my $control = $c->dpkg($range)
- Returns a Dpkg::Control::Changelog object representing the entries
selected by the optional range specifier (see "RANGE SELECTION"
for details). Returns undef in no entries are matched.
The following fields are contained in the object:
- Source
- package name (in the first entry)
- Version
- packages' version (from first entry)
- Distribution
- target distribution (from first entry)
- Urgency
- urgency (highest of all printed entries)
- Maintainer
- person that created the (first) entry
- Date
- date of the (first) entry
- Closes
- bugs closed by the entry/entries, sorted by bug number
- Changes
- content of the the entry/entries
- my @controls = $c->rfc822($range)
- Returns a Dpkg::Index containing Dpkg::Control::Changelog objects where
each object represents one entry in the changelog that is part of the
range requested (see "RANGE SELECTION" for details). For the
format of such an object see the description of the "dpkg"
method (while ignoring the remarks about which values are taken from the
first entry).
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
C<{ since =E<gt> '2.0' }> 3.1, 3.0, 2.2
C<{ until =E<gt> '2.0' }> 1.3, 1.2
C<{ from =E<gt> '2.0' }> 3.1, 3.0, 2.2, 2.1, 2.0
C<{ to =E<gt> '2.0' }> 2.0, 1.3, 1.2
C<{ count =E<gt> 2 }> 3.1, 3.0
C<{ count =E<gt> -2 }> 1.3, 1.2
C<{ count =E<gt> 3, offset=E<gt> 2 }> 2.2, 2.1, 2.0
C<{ count =E<gt> 2, offset=E<gt> -3 }> 2.0, 1.3
C<{ count =E<gt> -2, offset=E<gt> 3 }> 3.0, 2.2
C<{ count =E<gt> -2, offset=E<gt> -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 1.00¶
Mark the module as public.
AUTHOR¶
Frank Lichtenheld, <frank@lichtenheld.de> Raphaël Hertzog,
<hertzog@debian.org>