dpkg-mergechangelogs(1) dpkg suite dpkg-mergechangelogs(1)
NAME
dpkg-mergechangelogs - 3-way merge of debian/changelog files
SYNOPSIS
dpkg-mergechangelogs [option...] old new-a new-b [out]
DESCRIPTION
This program will use the 3 provided versions of the Debian changelog
to generate a merged changelog file. The resulting changelog is stored
in the file out or output to the standard output if that parameter is
not given.
Each entry is identified by its version number and they are assumed to
be not conflicting, they are simply merged in the right order (by
decreasing version number). When --merge-prereleases is used, the part
of the version number after the last tilde is dropped so that
1.0-1~exp1 and 1.0-1~exp5 are considered to be the same entry. When the
same version is available in both new-a and new-b, a standard line-
based 3-way merge is attempted (provided that the module
Algorithm::Merge is available — it's part of the package libalgorithm-
merge-perl — otherwise you get a global conflict on the content of the
entry).
OPTIONS
--merge-unreleased
Ignore the version number when the entries are marked as UNRELEASED
(since dpkg 1.21.0).
This is useful when you have diverging development for versions
that have not yet been released. For instance 2.1-1 is released,
then development happens for the new 2.2-1 and then for 2.3-1,
where it makes sense to just end with a coalesced entry for 2.3-1
including all the development done in 2.2-1.
-m, --merge-prereleases
Drop the part after the last tilde in the version number when doing
version comparison to identify if two entries are supposed to be
the same or not.
This is useful when you keep using the same changelog entry but you
increase its version number regularly. For instance, you might have
2.3-1~exp1, 2.3-1~exp2, ... until the official release 2.3-1 and
they are all the same changelog entry that has evolved over time.
--help
Show the usage message and exit.
--version
Show the version and exit.
ENVIRONMENT
DPKG_COLORS
Sets the color mode (since dpkg 1.18.5). The currently accepted
values are: auto (default), always and never.
DPKG_NLS
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).
LIMITATIONS
Anything that is not parsed by Dpkg::Changelog is lost during the
merge. This might include stuff like comments which were not supposed
to be there, etc.
INTEGRATION WITH GIT
If you want to use this program to merge Debian changelog files in a
git repository, you have first to register a new merge driver in
.git/config or ~/.gitconfig:
[merge "dpkg-mergechangelogs"]
name = debian/changelog merge driver
driver = dpkg-mergechangelogs -m %O %A %B %A
Then you have to setup the merge attribute for the debian/changelog
file either in .gitattributes in the repository itself, or in
.git/info/attributes:
debian/changelog merge=dpkg-mergechangelogs
1.21.22 2023-05-11 dpkg-mergechangelogs(1)
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