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mr

NAME

mr - a Multiple Repository management tool

SYNOPSIS

mr [options] checkout

mr [options] update

mr [options] status

mr [options] commit [-m ``message'']

mr [options] record [-m ``message'']

mr [options] diff

mr [options] log

mr [options] bootstrap url [directory]

mr [options] register [repository]

mr [options] config section [``parameter=[value]'' ...]

mr [options] action [params ...]

mr [options] [online|offline]

mr [options] remember action [params ...]

DESCRIPTION

mr is a Multiple Repository management tool. It can checkout, update, or perform other actions on a set of repositories as if they were one combined repository. It supports any combination of subversion, git, cvs, mercurial, bzr and darcs repositories, and support for other revision control systems can easily be added.

mr cds into and operates on all registered repositories at or below your working directory. Or, if you are in a subdirectory of a repository that contains no other registered repositories, it will stay in that directory, and work on only that repository,

mr is configured by .mrconfig files, which list the repositories. It starts by reading the .mrconfig file in your home directory, and this can in turn chain load .mrconfig files from repositories.

These predefined commands should be fairly familiar to users of any revision control system:

checkout (or co)

Checks out any repositories that are not already checked out.

update

Updates each repository from its configured remote repository.

If a repository isn't checked out yet, it will first check it out.

status

Displays a status report for each repository, showing what uncommitted changes are present in the repository.

commit (or ci)

Commits changes to each repository. (By default, changes are pushed to the remote repository too, when using distributed systems like git. If you don't like this default, you can change it in your .mrconfig, or use record instead.)

The optional -m parameter allows specifying a commit message.

record

Records changes to the local repository, but does not push them to the remote repository. Only supported for distributed revision control systems.

The optional -m parameter allows specifying a commit message.

push

Pushes committed local changes to the remote repository. A no-op for centralized revision control systems.

diff

Show a diff of uncommitted changes.

log

Show the commit log.

These commands are also available:

bootstrap url [directory]

Causes mr to download the url, and use it as a .mrconfig file to checkout the repositories listed in it, into the specified directory.

The directory will be created if it does not exist. If no directory is specified, the current directory will be used.

If the .mrconfig file includes a repository named ``.'', that is checked out into the top of the specified directory.

list (or ls)

List the repositories that mr will act on.

register

Register an existing repository in a mrconfig file. By default, the repository in the current directory is registered, or you can specify a directory to register.

The mrconfig file that is modified is chosen by either the -c option, or by looking for the closest known one at or below the current directory.

config

Adds, modifies, removes, or prints a value from a mrconfig file. The next parameter is the name of the section the value is in. To add or modify values, use one or more instances of ``parameter=value''. Use ``parameter='' to remove a parameter. Use just ``parameter'' to get the value of a parameter.

For example, to add (or edit) a repository in src/foo:

   mr config src/foo checkout="svn co svn://example.com/foo/trunk foo"
 
 

To show the command that mr uses to update the repository in src/foo:

   mr config src/foo update
 
 

To see the built-in library of shell functions contained in mr:

   mr config DEFAULT lib
 
 

The ~/.mrconfig file is used by default. To use a different config file, use the -c option.

offline

Advises mr that it is in offline mode. Any commands that fail in offline mode will be remembered, and retried when mr is told it's online.

online

Advices mr that it is in online mode again. Commands that failed while in offline mode will be re-run.

remember

Remember a command, to be run later when mr re-enters online mode. This implicitly puts mr into offline mode. The command can be any regular mr command. This is useful when you know that a command will fail due to being offline, and so don't want to run it right now at all, but just remember to run it when you go back online.

help

Displays this help.

Actions can be abbreviated to any unambiguous substring, so ``mr st'' is equivalent to ``mr status'', and ``mr up'' is equivalent to ``mr update''

Additional parameters can be passed to most commands, and are passed on unchanged to the underlying revision control system. This is mostly useful if the repositories mr will act on all use the same revision control system.

OPTIONS

-d directory

--directory directory

Specifies the topmost directory that mr should work in. The default is the current working directory.

-c mrconfig

--config mrconfig

Use the specified mrconfig file. The default is ~/.mrconfig

-p

--path

Search in the current directory, and its parent directories and use the first .mrconfig found, instead of the default ~/.mrconfig.

-v

--verbose

Be verbose.

-q

--quiet

Be quiet.

-k

--insecure

Accept untrusted SSL certificates when bootstrapping.

-s

--stats

Expand the statistics line displayed at the end to include information about exactly which repositories failed and were skipped, if any.

-i

--interactive

Interactive mode. If a repository fails to be processed, a subshell will be started which you can use to resolve or investigate the problem. Exit the subshell to continue the mr run.

-n [number]

--no-recurse [number]

If no number if specified, just operate on the repository for the current directory, do not recurse into deeper repositories.

If a number is specified, will recurse into repositories at most that many subdirectories deep. For example, with -n 2 it would recurse into ./src/foo, but not ./src/packages/bar.

-j [number]

--jobs [number]

Run the specified number of jobs in parallel, or an unlimited number of jobs with no number specified. This can greatly speed up operations such as updates. It is not recommended for interactive operations.

Note that running more than 10 jobs at a time is likely to run afoul of ssh connection limits. Running between 3 and 5 jobs at a time will yield a good speedup in updates without loading the machine too much.

-t

--trust-all

Trust all mrconfig files even if they are not listed in ~/.mrtrust. Use with caution.

MRCONFIG FILES

Here is an example .mrconfig file:

   [src]
   checkout = svn co svn://svn.example.com/src/trunk src
   chain = true
 
   [src/linux-2.6]
   checkout = git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git &&
         cd linux-2.6 &&
         git checkout -b mybranch origin/master
 
 

The .mrconfig file uses a variant of the INI file format. Lines starting with ``#'' are comments. Values can be continued to the following line by indenting the line with whitespace.

The ``DEFAULT'' section allows setting default values for the sections that come after it.

The ``ALIAS'' section allows adding aliases for actions. Each parameter is an alias, and its value is the action to use.

All other sections add repositories. The section header specifies the directory where the repository is located. This is relative to the directory that contains the mrconfig file, but you can also choose to use absolute paths. (Note that you can use environment variables in section names; they will be passed through the shell for expansion. For example, ``[$HOSTNAME]'', or ``[${HOSTNAME}foo]'')

Within a section, each parameter defines a shell command to run to handle a given action. mr contains default handlers for ``update'', ``status'', ``commit'', and other standard actions. Normally you only need to specify what to do for ``checkout''.

Note that these shell commands are run in a ``set -e'' shell environment, where any additional parameters you pass are available in ``$@''. The ``checkout'' command is run in the parent of the repository directory, since the repository isn't checked out yet. All other commands are run inside the repository, though not necessarily at the top of it.

The ``MR_REPO'' environment variable is set to the path to the top of the repository. (For the ``register'' action, ``MR_REPO'' is instead set to the basename of the directory that should be created when checking the repository out.)

The ``MR_CONFIG'' environment variable is set to the .mrconfig file that defines the repo being acted on, or, if the repo is not yet in a config file, the .mrconfig file that should be modified to register the repo.

A few parameters have special meanings:

skip

If the ``skip'' parameter is set and its command returns true, then mr will skip acting on that repository. The command is passed the action name in $1.

Here are two examples. The first skips the repo unless mr is run by joey. The second uses the hours_since function (included in mr's built-in library) to skip updating the repo unless it's been at least 12 hours since the last update.

   skip = test `whoami` != joey
   skip = [ "$1" = update ] && ! hours_since "$1" 12
 
 

order

The ``order'' parameter can be used to override the default ordering of repositories. The default order value is 10. Use smaller values to make repositories be processed earlier, and larger values to make repositories be processed later.

Note that if a repository is located in a subdirectory of another repository, ordering it to be processed earlier is not recommended.

chain

If the ``chain'' parameter is set and its command returns true, then mr will try to load a .mrconfig file from the root of the repository.

include

If the ``include'' parameter is set, its command is ran, and should output additional mrconfig file content. The content is included as if it were part of the including file.

Unlike all other parameters, this parameter does not need to be placed within a section.

lib

The ``lib'' parameter can specify some shell code that will be run before each command, this can be a useful way to define shell functions for other commands to use.

When looking for a command to run for a given action, mr first looks for a parameter with the same name as the action. If that is not found, it looks for a parameter named ``rcs_action'' (substituting in the name of the revision control system and the action). The name of the revision control system is itself determined by running each defined ``rcs_test'' action, until one succeeds.

Internally, mr has settings for ``git_update'', ``svn_update'', etc. To change the action that is performed for a given revision control system, you can override these rcs specific actions. To add a new revision control system, you can just add rcs specific actions for it.

The ~/.mrlog file contains commands that mr has remembered to run later, due to being offline. You can delete or edit this file to remove commands, or even to add other commands for 'mr online' to run. If the file is present, mr assumes it is in offline mode.

UNTRUSTED MRCONFIG FILES

Since mrconfig files can contain arbitrary shell commands, they can do anything. This flexibility is good, but it also allows a malicious mrconfig file to delete your whole home directory. Such a file might be contained inside a repository that your main ~/.mrconfig checks out and chains to. To avoid worries about evil commands in a mrconfig file, mr has the ability to read mrconfig files in untrusted mode. Such files are limited to running only known safe commands (like ``git clone'') in a carefully checked manner.

By default, mr trusts all mrconfig files. (This default will change in a future release!) But if you have a ~/.mrtrust file, mr will only trust mrconfig files that are listed within it. (One file per line.) All other files will be treated as untrusted.

EXTENSIONS

mr can be extended to support things such as unison and git-svn. Some files providing such extensions are available in /usr/share/mr/. See the documentation in the files for details about using them.

AUTHOR

Copyright 2007-2010 Joey Hess <joey@kitenet.net>

Licensed under the GNU GPL version 2 or higher.

http://kitenet.net/~joey/code/mr/