Provided by: coinst_1.9.3-6_amd64 
NAME
comigrate - managing package migrations from Debian unstable to testing
SYNOPSIS
comigrate [options] [--heidi file] [--hints file]
comigrate [options] --update
comigrate [options] --migrate package
comigrate [options] --equivocal
comigrate [options] --excuses file [--svg]
comigrate [options] --explain dir
DESCRIPTION
comigrate is a tool designed to manage the migration of packages from Debian unstable to testing. It can
be used in different ways. First, it can compute which packages can migrate into testing; it can output
either an HeidiResult file listing the updated contents of testing, or a set of hints that can be fed to
Britney to help it perform the migration. Second, it can output detailed reports of what prevents
packages from migrating. Last, it can be used to interactively troubleshoot the migration of a given
package.
Unless an alternative command is given, comigrate will perform package migration and output the
corresponding HeidiResult file at the location indicated in the configuration file.
OPTIONS
Commands
The default behavior of comigrate is to compute which packages can migrate from unstable to testing.
This behavior can be overriden by the options below.
--equivocal
Output the set of packages that can migrate without making any package non-installable but that
will make it impossible to install some set of packages together (package co-installability would
no be preserved). This makes it possible to find the packages that would be allowed to migrate
when using the --inst option (preserving only package installability), but that could nonetheless
be problematic.
--excuses file
Write to this HTML file a detailed explanation of why some packages cannot migrate. With the --svg
option, an SVG graph is also included for each installability or co-installability issue (set of
packages that one would not be able to install together anymore) that prevents the migration. The
dot tool is required to produce these graphs.
--explain dir
This command is designed to produce a report that can be published over HTTP. An HTML file is
created for each package that cannot migrate, providing a detailed explanation of why this package
cannot migrate. A file listing co-installability issues (that is, set of packages that can no
longer be installed together) that would result from forthcoming migrations is also created. The
--popcon option can be used to specify popcon data to use for the report. The dot tool is
required for this command.
--migrate package
Compute whether it is possible to migrate this source package. If this is indeed possible, a
corresponding Britney hint is outputted, by default on the standard output (this can be overridden
with the --hints option).
--update
Initialize or update the data directory.
Common Options
--arches lst
Comma-separated list of architectures to consider (default to all).
-c file, --config file
Use this Britney configuration file.
Package Migration Options
--all-hints
Show all hints. By default, hints consisting of a single package are omitted when outputting
hints.
--break sets
Override the default migration constraint that set of packages that could be install together can
still be installed together after migration (package co-installability). This option allows to
specify that some precise set of packages can become non co-installable (or, in the case of a
single package, that this package can become non installable). This is crucial to allow the
migration of packages that are no longer compatible. The argument sets is a comma-separated list
of sets of packages. Each set is either a list of binary package names separated by a vertical bar
symbol |, or a wildcard _ standing for any package. We explain this option through examples. You
can write --break libjpeg62-dev to state that package libjpeg62-dev does not have to remain
installable. But it is usually better to indicate that the package should remain installable but
that it is fine if it is no longer installable with some other packages: --break libjpeg62-dev,_.
You can be even more precise and specify that two given packages can become incompatible, but no
other incompatibility should be introduced: --break parallel,moreutils. Finally, you can use the
vertical bar symbol to factorize several sets of packages: --break 'unoconv,python-uno|docvert-
libreoffice' means that package unoconv does not have to remain installable together with python-
uno nor docvert-libreoffice.
--heidi HeidiResult
Write the result of package migration to file HeidiResult. When HeidiResult is -, write to
standard output. The option only make sense when no specific command is given.
--hints file
Output hints to this file. When file is -, write to standard output. This disable the ouput of
the HeidiResult file, unless an explicit --heidi option is provided as well.
--inst When computing possible migration, only preserves single package installability. This is similar
to what Britney does. The default is to ensure the stronger requirement that set of packages that
could be install together can still be installed together after migration (that is, package co-
installability).
--offset n
Move n days into the future. This is convenient to see what packages will be able to migrate in a
few days.
--remove pkg
Compute package migration as if the source package pkg and its associated binary packages had been
removed from unstable. This is a convenient way to migrate an important package when its
migration is prevented by packages of low importance. Together with the --migrate command, this
option can help finding out all issues preventing the migration of a given package.
Command-Specific Options
--svg Include conflict graphs (in SVG format) in excuse output. This option only makes sense together
with the --excuses option.
--popcon file
Use popcon data from this file. This option only makes sense together with the --explain option.
--source url
Download package information from the given url. This option only makes sense together with the
--update option.
Miscellaneous Options
--debug name
Activate debug option name. Use --debug help to list available debug options.
-help, --help
Print a usage message briefly summarizing the command-line options.
--input dir
Select the directory containing Britney data.
--no-cache
Disable on-disk caching.
--proc n
Provide number of processors. Use 1 to disable concurrency. Defaults to use all processors.
Ignored Options
These two Britney options are currently ignored and are present only for compatibility.
--control-files
Currently ignored.
-v Currently ignored.
EXAMPLES
To get started, you need to use a Britney configuration file britney.conf. The files specifies in
particular the location of migration data (control files, hint files, ...). These data can then be
downloaded (or updated) with the command below.
comigrate -c britney.conf --update
Running comigrate without option will make it behave like Britney: it will compute the set of packages
that can migrate and write a corresponding HeidiResult file at the location indicated in the
configuration file.
comigrate -c britney.conf
By default, comigrate is more picky than Britney: it will not allow packages to migrate if any set of
packages that could be installed together can no longer be installed together. With the --inst option,
comigrate will only check that packages remain installable, just like Britney does.
comigrate -c britney.conf --inst
Alternatively, you can get the set of Britney easy hints corresponding to the migration.
comigrate -c britney.conf --hints - --all-hints
The --migrate option will give you an explanation of why a package cannot migrate. (If the package can
in fact migrate, the corresponding easy hint will be printed.)
comigrate -c britney.conf --migrate ghc
The --remove and --break options can be used together with this option to get a clear understand of what
needs to be done to migrate the package.
AUTHOR
Comigrate has been written by Jérôme Vouillon.
SEE ALSO
dot(1)
The tool Web page: <http://coinst.irill.org/comigrate>.
COMIGRATE(1)