dpkg-parsechangelog(1)                                       dpkg suite                                      dpkg-parsechangelog(1)

       dpkg-parsechangelog - parse Debian changelog files

       dpkg-parsechangelog [option...]

       dpkg-parsechangelog reads and parses the changelog of an unpacked Debian source tree and outputs the information in it to
       standard output in a machine-readable form.

       -l, --file changelog-file
           Specifies the changelog file to read information from.  A ‘-’ can be used to specify reading from standard input.  The
           default is debian/changelog.

       -F changelog-format
           Specifies the format of the changelog. By default the format is read from a special line near the bottom of the
           changelog or failing that defaults to the debian standard format. See also CHANGELOG FORMATS.

       -L libdir
           Obsolete option without effect (since dpkg 1.18.8).  Setting the perl environment variables PERL5LIB or PERLLIB has a
           similar effect when looking for the parser perl modules.

       -S, --show-field field
           Specifies the name of the field to show (since dpkg 1.17.0).  The field name is not printed, only its value.

       -?, --help
           Show the usage message and exit.

           Show the version and exit.

   Parser Options
       The following options can be used to influence the output of the changelog parser, for example the range of entries or the
       format of the output.

       --format output-format
           Set the output format. Currently supported values are dpkg and rfc822.  dpkg is the classic output format (from before
           this option existed) and the default. It consists of one stanza in Debian control format (see deb-control(5)). If more
           than one entry is requested, then most fields are taken from the first entry (usually the most recent entry), except
           otherwise stated:

           Source: pkg-name
           Version: version
           Distribution: target-distribution
           Urgency: urgency
               The highest urgency of all included entries is used, followed by the concatenated (space-separated) comments from
               all the versions requested.

           Maintainer: author
           Date: date
               The date of the entry as a string, as it appears in the changelog.  With a strptime(3) format "%a, %d %b %Y %T %z",
               but where the day of the week might not actually correspond to the real day obtained from the rest of the date
               string.  If you need a more accurate representation of the date, use the Timestamp field, but take into account it
               might not be possible to map it back to the exact value in this field.

           Timestamp: timestamp
               The date of the entry as a timestamp in seconds since the epoch (since dpkg 1.18.8).

           Closes: bug-number
               The Closes fields of all included entries are merged.

           Changes: changelog-entries
               The text of all changelog entries is concatenated. To make this field a valid Debian control format multiline field
               empty lines are replaced with a single full stop and all lines is intended by one space character. The exact content
               depends on the changelog format.

           The Version, Distribution, Urgency, Maintainer and Changes fields are mandatory.

           There might be additional user-defined fields present.

           The rfc822 format uses the same fields but outputs a separate stanza for each changelog entry so that all metadata for
           each entry is preserved.

           Include all changes in reverse order (since dpkg 1.19.1).

           Note: For the dpkg format the first entry will be the most ancient entry.

           Include all changes.  Note: Other options have no effect when this is in use.

       -s, --since version
       -v version
           Include all changes later than version.

       -u, --until version
           Include all changes earlier than version.

       -f, --from version
           Include all changes equal or later than version.

       -t, --to version
           Include all changes up to or equal than version.

       -c, --count number
       -n number
           Include number entries from the top (or the tail if number is lower than 0).

       -o, --offset number
           Change the starting point for --count, counted from the top (or the tail if number is lower than 0).

       It is possible to use a different format to the standard one, by providing a parser for that alternative format.

       In order to have dpkg-parsechangelog run the new parser, a line must be included within the last 40 lines of the changelog
       file, matching the Perl regular expression: “\schangelog-format:\s+([0-9a-z]+)\W”.  The part in parentheses should be the
       name of the format. For example:

           @@@ changelog-format: otherformat @@@

       Changelog format names are non-empty strings of lowercase alphanumerics (“a-z0-9”).

       If such a line exists then dpkg-parsechangelog will look for the parser as a Dpkg::Changelog::Otherformat perl module; it is
       an error for it not being present.  The parser name in the perl module will be automatically capitalized.  The default
       changelog format is debian, and a parser for it is provided by default.

       The parser should be derived from the Dpkg::Changelog class and implement the required documented interface.

       If the changelog format which is being parsed always or almost always leaves a blank line between individual change notes,
       these blank lines should be stripped out, so as to make the resulting output compact.

       If the changelog format does not contain date or package name information this information should be omitted from the
       output. The parser should not attempt to synthesize it or find it from other sources.

       If the changelog does not have the expected format the parser should error out, rather than trying to muddle through and
       possibly generating incorrect output.

       A changelog parser may not interact with the user at all.

       All Parser Options except for -v are only supported since dpkg 1.14.16.

       Short option parsing with non-bundled values available only since dpkg 1.18.0.

           Sets the color mode (since dpkg 1.18.5).  The currently accepted values are: auto (default), always and never.

           If set, it will be used to decide whether to activate Native Language Support, also known as internationalization (or
           i18n) support (since dpkg 1.19.0).  The accepted values are: 0 and 1 (default).

           The changelog file, used to obtain version-dependent information about the source package, such as the urgency and
           distribution of an upload, the changes made since a particular release, and the source version number itself.


1.21.21                                                      2023-03-02                                      dpkg-parsechangelog(1)