prep

[code/myrepos.git] / mr

diff --git a/mr b/mr
index 314de600f7708a2ec026e309c31587262260a6c1..7fa3180f56259753a4292b4d8846e60eeb901684 100755 (executable)
--- a/mr
+++ b/mr
@@ -1,8 +1,8 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl

 
 =head1 NAME
 
 
 =head1 NAME
 

-mr - a Multiple Repository management tool
+mr - a tool to manage all your version control repos

 
 =head1 SYNOPSIS
 
 
 =head1 SYNOPSIS
 


@@ -12,30 +12,56 @@ B<mr> [options] update
 
 B<mr> [options] status
 
 
 B<mr> [options] status
 

+B<mr> [options] clean [-f]
+

 B<mr> [options] commit [-m "message"]
 
 B<mr> [options] commit [-m "message"]
 

+B<mr> [options] record [-m "message"]
+
+B<mr> [options] fetch
+
+B<mr> [options] push
+

 B<mr> [options] diff
 
 B<mr> [options] log
 
 B<mr> [options] diff
 
 B<mr> [options] log
 

+B<mr> [options] grep pattern
+
+B<mr> [options] run command [param ...]
+
+B<mr> [options] bootstrap src [directory]
+
+B<mr> [options] register [repository]
+
+B<mr> [options] config section ["setting=[value]" ...]
+

 B<mr> [options] action [params ...]
 
 B<mr> [options] action [params ...]
 

-=head1 DESCRIPTION
+B<mr> [options] [online|offline]

 
 

-B<mr> is a Multiple Repository management tool. It allows you to register a
-set of repositories in a .mrconfig file, and then checkout, update, or
-perform other actions on the repositories as if they were one big
-respository.
+B<mr> [options] remember action [params ...]
+
+=head1 DESCRIPTION

 
 

-Any mix of revision control systems can be used with B<mr>, and you can
-define arbitrary actions for commands like "update", "checkout", or "commit".
+B<mr> is a tool to manage all your version control repos. 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, darcs, fossil and veracity repositories, and support
+for other version control systems can easily be added.

 
 

-B<mr> cds into and operates on all registered repsitories at or below your
+B<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,
 
 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,
 

-The predefined commands should be fairly familiar to users of any revision
+B<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. It also automatically
+looks for a .mrconfig file in the current directory, or in one of its
+parent directories.
+
+These predefined commands should be fairly familiar to users of any version

 control system:
 
 =over 4
 control system:
 
 =over 4


@@ -53,15 +79,42 @@ If a repository isn't checked out yet, it will first check it out.
 =item status
 
 Displays a status report for each repository, showing what
 =item status
 
 Displays a status report for each repository, showing what

-uncommitted changes are present in the repository.
+uncommitted changes are present in the repository. For distributed version
+control systems, also shows unpushed local branches.
+
+=item clean
+
+Print ignored files, untracked files and other cruft in the working directory.
+
+The optional -f parameter allows removing the files as well as printing them.

 
 =item commit (or ci)
 
 Commits changes to each repository. (By default, changes are pushed to the
 
 =item commit (or ci)
 
 Commits changes to each repository. (By default, changes are pushed to the

-remote repository too, when using distributed systems like git.)
+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.
 
 
 The optional -m parameter allows specifying a commit message.
 

+=item record
+
+Records changes to the local repository, but does not push them to the
+remote repository. Only supported for distributed version control systems.
+
+The optional -m parameter allows specifying a commit message.
+
+=item fetch
+
+Fetches from each repository's remote repository, but does not
+update the working copy. Only supported for some distributed version
+control systems.
+
+=item push
+
+Pushes committed local changes to the remote repository. A no-op for
+centralized version control systems.
+

 =item diff
 
 Show a diff of uncommitted changes.
 =item diff
 
 Show a diff of uncommitted changes.


@@ -70,24 +123,123 @@ Show a diff of uncommitted changes.
 
 Show the commit log.
 
 
 Show the commit log.
 

+=item grep pattern
+
+Searches for a pattern in each repository using the grep subcommand. Uses
+ack-grep on VCS that do not have their own.
+
+=item run command [param ...]
+
+Runs the specified command in each repository.
+
+=back
+
+These commands are also available:
+
+=over 4
+
+=item bootstrap src [directory]
+
+Causes mr to retrieve the source C<src> and use it as a .mrconfig file to
+checkout the repositories listed in it, into the specified directory.
+
+B<mr> understands several types of sources:
+
+=over 4
+
+=item URL for curl
+
+C<src> may be an URL understood by B<curl>.
+
+=item copy via ssh
+
+To use B<scp> to download, the C<src> may have the form
+C<ssh://[user@]host:file>.
+
+=item local file
+
+You can retrieve the config file by other means and pass its B<path> as C<src>.
+
+=item standard input
+
+If source C<src> consists in a single dash C<->, config file is read from
+standard input.
+
+=back
+
+The directory will be created if it does not exist. If no directory is
+specified, the current directory will be used.
+
+As a special case, if source C<src> includes a repository named ".", that
+is checked out into the top of the specified directory.
+

 =item list (or ls)
 
 List the repositories that mr will act on.
 
 =item list (or ls)
 
 List the repositories that mr will act on.
 

+=item 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 in a parent of the current directory.
+
+=item 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 "setting=value". Use "setting=" to
+remove a setting. Use just "setting" to get the value of a that setting.
+
+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 that is used is chosen by either the -c option, or by
+looking for the closest known one at or in a parent of the current directory.
+
+=item 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.
+
+=item online
+
+Advices mr that it is in online mode again. Commands that failed while in
+offline mode will be re-run.
+
+=item 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.
+

 =item help
 
 Displays this help.
 
 =back
 
 =item help
 
 Displays this help.
 
 =back
 

-Actions can be abbreviated to any unambiguous subsctring, so
-"mr st" is equivilant to "mr status", and "mr up" is equivilant to "mr
+Actions can be abbreviated to any unambiguous substring, so
+"mr st" is equivalent to "mr status", and "mr up" is equivalent to "mr

 update"
 
 update"
 

-Additional parameters can be passed to other commands than "commit", they
-will be 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.
+Additional parameters can be passed to most commands, and are passed on
+unchanged to the underlying version control system. This is mostly useful
+if the repositories mr will act on all use the same version control
+system.

 
 =head1 OPTIONS
 
 
 =head1 OPTIONS
 


@@ -95,92 +247,322 @@ revision control system.
 
 =item -d directory
 
 
 =item -d directory
 

+=item --directory directory
+

 Specifies the topmost directory that B<mr> should work in. The default is
 the current working directory.
 
 =item -c mrconfig
 
 Specifies the topmost directory that B<mr> should work in. The default is
 the current working directory.
 
 =item -c mrconfig
 

-Use the specified mrconfig file, instead of looking for one in your home
-directory.
+=item --config mrconfig
+
+Use the specified mrconfig file. The default is to use both F<~/.mrconfig>
+as well as look for a F<.mrconfig> file in the current directory, or in one
+of its parent directories.
+
+=item -f
+
+=item --force
+
+Force mr to act on repositories that would normally be skipped due to their
+configuration.

 
 =item -v
 
 
 =item -v
 

+=item --verbose
+

 Be verbose.
 
 Be verbose.
 

-=back
+=item -m
+
+=item --minimal
+
+Minimise output. If a command fails or there is any output then the usual
+output will be shown.
+
+=item -q
+
+=item --quiet
+
+Be quiet. This suppresses mr's usual output, as well as any output from
+commands that are run (including stderr output). If a command fails,
+the output will be shown.
+
+=item -k
+
+=item --insecure
+
+Accept untrusted SSL certificates when bootstrapping.
+
+=item -s
+
+=item --stats
+
+Expand the statistics line displayed at the end to include information
+about exactly which repositories failed and were skipped, if any.
+
+=item -i
+
+=item --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.
+
+=item -n [number]
+
+=item --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.
+
+=item -j [number]
+
+=item --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.

 
 

-=head1 FILES
+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.

 
 

-B<mr> is configured by .mrconfig files. It starts by reading the .mrconfig
-file in your home directory, and this can in turn chain load .mrconfig files
-from repositories.
+=item -t

 
 

-Here is an example .mrconfig file:
+=item --trust-all
+
+Trust all mrconfig files even if they are not listed in F<~/.mrtrust>.
+Use with caution.
+
+=item -p
+
+=item --path
+
+This obsolete flag is ignored.
+
+=back
+
+=head1 MRCONFIG FILES
+
+Here is an example F<.mrconfig> file:

 
   [src]
 
   [src]

-  checkout = svn co svn://svn.example.com/src/trunk src
+  checkout = svn checkout svn://svn.example.com/src/trunk src

   chain = true
 
   [src/linux-2.6]
   chain = true
 
   [src/linux-2.6]

-  checkout = git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
+  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. Lines ending with "\" are continued on to the next line.
+The F<.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
+The C<DEFAULT> section allows setting default values for the sections that

 come after it.
 
 come after it.
 

-The "ALIAS" section allows adding aliases for actions. Each parameter
+The C<ALIAS> section allows adding aliases for actions. Each setting

 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
 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.
+paths. (Note that you can use environment variables in section names; they
+will be passed through the shell for expansion. For example, 
+C<[$HOSTNAME]>, or C<[${HOSTNAME}foo]>).

 
 

-Within a section, each parameter defines a shell command to run to handle a
-given action. mr contains default handlers for the "update", "status", and
-"commit" actions, so normally you only need to specify what to do for
-"checkout".
+Within a section, each setting defines a shell command to run to handle a
+given action. mr contains default handlers for "update", "status",
+"commit", and other standard actions.

 
 

-Note that these shell commands are run in a "set -e" shell
+Normally you only need to specify what to do for "checkout". Here you
+specify the command to run in order to create a checkout of the repository.
+The command will be run in the parent directory, and must create the
+repository's directory. So use C<git clone>, C<svn checkout>, C<bzr branch>
+or C<bzr checkout> (for a bound branch), etc.
+
+Note that these shell commands are run in a C<set -e> shell

 environment, where any additional parameters you pass are available in
 environment, where any additional parameters you pass are available in

-"$@". The "checkout" command is run in the parent of the repository
-directory, since the repository isn't checked out yet. All other commands
-are run inside the repository, though not necessarily at the top of it.
-The "MR_REPO" environment variable is set to the path to the top of the
-repository.
+C<$@>. All commands other than "checkout" are run inside the repository,
+though not necessarily at the top of it.
+
+The C<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 C<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 F<.mrconfig> file that should be modified to register the repo.
+
+The C<MR_ACTION> environment variable is set to the command being run
+(update, checkout, etc).

 
 

-A few parameters have special meanings:
+A few settings have special meanings:

 
 =over 4
 
 =item skip
 
 
 =over 4
 
 =item skip
 

-If the "skip" parameter is set and its command returns nonzero, then B<mr>
-will skip acting on that repository.
+If "skip" is set and its command returns true, then B<mr>
+will skip acting on that repository. The command is passed the action
+name in C<$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.
+
+  [mystuff]
+  checkout = ...
+  skip = test `whoami` != joey
+
+  [linux]
+  checkout = ...
+  skip = [ "$1" = update ] && ! hours_since "$1" 12
+ 
+Another way to use skip is for a lazy checkout. This makes mr skip
+operating on a repo unless it already exists. To enable the 
+repo, you have to explicitly check it out (using "mr --force -d foo checkout").
+
+  [foo]
+  checkout = ...
+  skip = lazy
+
+=item order
+
+The "order" setting 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.

 
 =item chain
 
 
 =item chain
 

-If the "chain" parameter is set and its command returns nonzero, then B<mr>
-will try to load a .mrconfig file from the root of the repository. (You
-should avoid chaining from repositories with untrusted committers.)
+If "chain" is set and its command returns true, then B<mr>
+will try to load a F<.mrconfig> file from the root of the repository.
+
+=item include
+
+If "include" 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 everything else, "include" does not need to be placed within a section.
+
+B<mr> ships several libraries that can be included to add support for
+additional version control type things (unison, git-svn, git-fake-bare,
+git-subtree). To include them all, you could use:
+
+  include = cat /usr/share/mr/*
+
+See the individual files for details.
+
+=item deleted
+
+If "deleted" is set and its command returns true, then
+B<mr> will treat the repository as deleted. It won't ever actually delete
+the repository, but it will warn if it sees the repository's directory.
+This is useful when one mrconfig file is shared among multiple machines,
+to keep track of and remember to delete old repositories.

 
 =item lib
 
 
 =item 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.
+The "lib" setting can contain 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. 
+
+Unlike most other settings, this can be specified multiple times, in
+which case the chunks of shell code are accumulatively concatenated
+together.
+
+=item fixups
+
+If "fixups" is set, its command is run whenever a repository
+is checked out, or updated. This provides an easy way to do things
+like permissions fixups, or other tweaks to the repository content,
+whenever the repository is changed.
+
+=item VCS_action
+
+When looking for a command to run for a given action, mr first looks for
+a setting with the same name as the action. If that is not found, it
+looks for a setting named "VCS_action" (substituting in the name of the
+version control system and the action).
+
+Internally, mr has settings for "git_update", "svn_update", etc. To change
+the action that is performed for a given version control system, you can
+override these VCS specific actions. To add a new version control system,
+you can just add VCS specific actions for it.
+
+=item pre_ and post_
+
+If "pre_action" is set, its command is run before mr performs the
+specified action. Similarly, "post_action" commands are run after mr
+successfully performs the specified action. For example, "pre_commit" is
+run before committing; "post_update" is run after updating.
+
+=item _append
+
+Any setting can be suffixed with C<_append>, to add an additional value
+to the existing value of the setting. In this way, actions 
+can be constructed accumulatively.
+
+=item VCS_test
+
+The name of the version control system is itself determined by
+running each defined "VCS_test" action, until one succeeds.

 
 =back
 
 
 =back
 

+=head1 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 F<~/.mrconfig> checks out. To
+avoid worries about evil commands in a mrconfig file, mr defaults to
+reading all mrconfig files other than the main F<~/.mrconfig> in untrusted
+mode. In untrusted mode, mrconfig files are limited to running only known
+safe commands (like "git clone") in a carefully checked manner.
+
+To configure mr to trust other mrconfig files, list them in F<~/.mrtrust>.
+One mrconfig file should be listed per line. Either the full pathname
+should be listed, or the pathname can start with F<~/> to specify a file
+relative to your home directory.
+
+=head1 OFFLINE LOG FILE
+
+The F<~/.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.
+
+=head1 EXTENSIONS
+
+mr can be extended to support things such as unison and git-svn. Some
+files providing such extensions are available in F</usr/share/mr/>. See
+the documentation in the files for details about using them.
+
+=head1 EXIT STATUS
+
+mr returns nonzero if a command failed in any of the repositories.
+

 =head1 AUTHOR
 
 =head1 AUTHOR
 

-Copyright 2007 Joey Hess <joey@kitenet.net>
+Copyright 2007-2011 Joey Hess <joey@kitenet.net>

 
 Licensed under the GNU GPL version 2 or higher.
 
 
 Licensed under the GNU GPL version 2 or higher.
 

-http://kitenet.net/~joey/code/mr/
+http://myrepos.branchable.com/

 
 =cut
 
 
 =cut
 


@@ -189,369 +571,1702 @@ use strict;
 use Getopt::Long;
 use Cwd qw(getcwd abs_path);
 
 use Getopt::Long;
 use Cwd qw(getcwd abs_path);
 

-my $directory=getcwd();
-my $config="$ENV{HOME}/.mrconfig";
+# things that can happen when mr runs a command
+use constant {
+       OK => 0,
+       FAILED => 1,
+       SKIPPED => 2,
+       ABORT => 3,
+};
+
+# configurables
+my $config_overridden=0;

 my $verbose=0;
 my $verbose=0;

+my $minimal=0;
+my $quiet=0;
+my $stats=0;
+my $force=0;
+my $insecure=0;
+my $interactive=0;
+my $max_depth;
+my $no_chdir=0;
+my $jobs=1;
+my $trust_all=0;
+my $directory=getcwd();
+my $terminal=-t STDOUT && eval{require IO::Pty::Easy;IO::Pty::Easy->import();1;};
+
+my $HOME_MR_CONFIG = "$ENV{HOME}/.mrconfig";
+$ENV{MR_CONFIG}=find_mrconfig();
+
+# globals :-(

 my %config;
 my %config;

+my %configfiles;

 my %knownactions;
 my %alias;
 my %knownactions;
 my %alias;

+my (@ok, @failed, @skipped);

 
 

-Getopt::Long::Configure("no_permute");
-my $result=GetOptions(
-       "d|directory=s" => sub { $directory=abs_path($_[1]) },
-       "c|config=s" => \$config,
-       "verbose" => \$verbose,
-);
-if (! $result || @ARGV < 1) {
-       die("Usage: mr [-d directory] action [params ...]\n".
-           "(Use mr help for man page.)\n");
+main();

 
 

+sub shellquote {
+       my $i=shift;
+       $i=~s/'/'"'"'/g;
+       return "'$i'";

 }
 
 }
 

-loadconfig(\*DATA);
-loadconfig($config);
-#use Data::Dumper;
-#print Dumper(\%config);
-
-eval {
-       use FindBin qw($Bin $Script);
-       $ENV{MR_PATH}=$Bin."/".$Script;
-};
+# Runs a shell command using a supplied function.
+# The lib will be included in the shell command line, and any params
+# will be available in the shell as $1, $2, etc.
+my $lastlib;
+sub runsh {
+       my ($action, $topdir, $subdir, $command, $params, $runner) = @_;
+
+       # optimisation: avoid running the shell for true and false
+       if ($command =~ /^\s*true\s*$/) {
+               $?=0;
+               return 0;
+       }
+       elsif ($command =~ /^\s*false\s*$/) {
+               $?=0;
+               return 1;
+       }
+       
+       my $quotedparams=join(" ", (map { shellquote($_) } @$params));
+       my $lib=exists $config{$topdir}{$subdir}{lib} ?
+                      $config{$topdir}{$subdir}{lib}."\n" : "";
+       if ($verbose && (! defined $lastlib || $lastlib ne $lib)) {
+               print "mr library now: >>$lib<<\n";
+               $lastlib=$lib;
+       }
+       my $shellcode="set -e;".$lib.
+               "my_sh(){ $command\n }; my_sh $quotedparams";
+       print "mr $action: running $action >>$command<<\n" if $verbose;
+       $runner->($shellcode);
+}

 
 

-# alias expansion and command stemming
-my $action=shift @ARGV;
-if (exists $alias{$action}) {
-       $action=$alias{$action};
+my %perl_cache;
+sub perl {
+       my $id=shift;
+       my $s=shift;
+       if ($s =~ m/^perl:\s+(.*)/s) {
+               return $perl_cache{$1} if exists $perl_cache{$1};
+               my $sub=eval "sub {$1}";
+               if (! defined $sub) {
+                       print STDERR "mr: bad perl code in $id: $@\n";
+               }
+               return $perl_cache{$1} = $sub;
+       }
+       return undef;

 }
 }

-if (! exists $knownactions{$action}) {
-       my @matches = grep { /^\Q$action\E/ }
-               keys %knownactions, keys %alias;
-       if (@matches == 1) {
-               $action=$matches[0];
+
+my %vcs;
+sub vcs_test {
+       my ($action, $dir, $topdir, $subdir) = @_;
+
+       if (exists $vcs{$dir}) {
+               return $vcs{$dir};
+       }
+
+       my $test="";
+       my %perltest;
+       foreach my $vcs_test (
+                       sort {
+                               length $a <=> length $b 
+                                         ||
+                                      $a cmp $b
+                       } grep { /_test$/ } keys %{$config{$topdir}{$subdir}}) {
+               my ($vcs)=$vcs_test =~ /(.*)_test/;
+               my $p=perl($vcs_test, $config{$topdir}{$subdir}{$vcs_test});
+               if (defined $p) {
+                       $perltest{$vcs}=$p;
+               }
+               else {
+                       $test="my_$vcs_test() {\n$config{$topdir}{$subdir}{$vcs_test}\n}\n".$test;
+                       $test.="if my_$vcs_test; then echo $vcs; fi\n";
+               }

        }
        }

-       elsif (@matches == 0) {
-               die "mr: unknown action \"$action\" (known actions: ".
-                       join(", ", sort keys %knownactions).")\n";
+
+       my @vcs;
+       foreach my $vcs (keys %perltest) {
+               if ($perltest{$vcs}->()) {
+                       push @vcs, $vcs;
+               }
+       }
+
+       push @vcs, split(/\n/,
+               runsh("vcs test", $topdir, $subdir, $test, [], sub {
+                       my $sh=shift;
+                       my $ret=`$sh`;
+                       return $ret;
+               })) if length $test;
+       if (@vcs > 1) {
+               print STDERR "mr $action: found multiple possible repository types (@vcs) for ".fulldir($topdir, $subdir)."\n";
+               return undef;
+       }
+       if (! @vcs) {
+               return $vcs{$dir}=undef;

        }
        else {
        }
        else {

-               die "mr: ambiguous action \"$action\" (matches: ".
-                       join(", ", @matches).")\n";
+               return $vcs{$dir}=$vcs[0];

        }
 }
        }
 }

+       
+sub findcommand {
+       my ($action, $dir, $topdir, $subdir, $is_checkout) = @_;
+       
+       if (exists $config{$topdir}{$subdir}{$action}) {
+               return $config{$topdir}{$subdir}{$action};
+       }

 
 

-if ($action eq 'help') {
-       exec($config{''}{DEFAULT}{help});
-}
+       if ($is_checkout) {
+               return undef;
+       }

 
 

-# work out what repos to act on
-my @repos;
-my $nochdir=0;
-foreach my $topdir (sort keys %config) {
-       foreach my $subdir (sort keys %{$config{$topdir}}) {
-               next if $subdir eq 'DEFAULT';
-               my $dir=($subdir =~/^\//) ? $subdir : $topdir.$subdir;
-               my $d=$directory;
-               $dir.="/" unless $dir=~/\/$/;
-               $d.="/" unless $d=~/\/$/;
-               next if $dir ne $directory && $dir !~ /^\Q$directory\E/;
-               push @repos, [$dir, $topdir, $subdir];
+       my $vcs=vcs_test(@_);
+
+       if (defined $vcs && 
+           exists $config{$topdir}{$subdir}{$vcs."_".$action}) {
+               return $config{$topdir}{$subdir}{$vcs."_".$action};

        }
        }

-}
-if (! @repos) {
-       # fallback to find a leaf repo
-       LEAF: foreach my $topdir (reverse sort keys %config) {
-               foreach my $subdir (reverse sort keys %{$config{$topdir}}) {
-                       next if $subdir eq 'DEFAULT';
-                       my $dir=($subdir =~/^\//) ? $subdir : $topdir.$subdir;
-                       my $d=$directory;
-                       $dir.="/" unless $dir=~/\/$/;
-                       $d.="/" unless $d=~/\/$/;
-                       if ($d=~/^\Q$dir\E/) {
-                               push @repos, [$dir, $topdir, $subdir];
-                               last LEAF;
-                       }
-               }
+       else {
+               return undef;

        }
        }

-       $nochdir=1;

 }
 
 }
 

-my (@failed, @successful, @skipped);
-foreach my $repo (@repos) {
-       action($action, @$repo);
+sub fulldir {
+       my ($topdir, $subdir) = @_;
+       return $subdir =~ /^\// ? $subdir : $topdir.$subdir;
+}
+
+sub terminal_friendly_spawn {
+       my $actionmsg = shift;
+       my $sh = shift;
+       my $quiet = shift;
+       my $minimal = shift;
+       my $output = "";
+       if ($terminal) {
+               my $pty = IO::Pty::Easy->new;
+               $pty->spawn($sh);
+               while ($pty->is_active) {
+                       my $data = $pty->read();
+                       $output .= $data if defined $data;
+               }
+               $pty->close;
+       } else {
+               $output = qx/$sh 2>&1/;
+       }
+       my $ret = $?;
+       if ($quiet && $ret != 0) {
+               print "$actionmsg\n" if $actionmsg;
+               print STDERR $output;
+       } elsif (!$quiet && (!$minimal || $output)) {
+               print "$actionmsg\n" if $actionmsg;
+               print $output;
+       }
+       return ($ret, $output ? 1 : 0);

 }
 
 sub action {
 }
 
 sub action {

-       my ($action, $dir, $topdir, $subdir) = @_;
+       my ($action, $dir, $topdir, $subdir, $force_checkout) = @_;
+       my $fulldir=fulldir($topdir, $subdir);
+       my $checkout_dir;
+
+       $ENV{MR_CONFIG}=$configfiles{$topdir};
+       my $is_checkout=($action eq 'checkout');
+       my $is_update=($action =~ /update/);
+
+       ($ENV{MR_REPO}=$dir) =~ s!/$!!;
+       $ENV{MR_ACTION}=$action;

        
        

-       my $lib= exists $config{$topdir}{$subdir}{lib} ?
-                       $config{$topdir}{$subdir}{lib} : "";
+       foreach my $testname ("skip", "deleted") {
+               next if $force && $testname eq "skip";
+
+               my $testcommand=findcommand($testname, $dir, $topdir, $subdir, $is_checkout);
+
+               if (defined $testcommand) {
+                       my $ret=runsh "$testname test", $topdir, $subdir,
+                               $testcommand, [$action],
+                               sub { system(shift()) };
+                       if ($ret != 0) {
+                               if (($? & 127) == 2) {
+                                       print STDERR "mr $action: interrupted\n";
+                                       return ABORT;
+                               }
+                               elsif ($? & 127) {
+                                       print STDERR "mr $action: $testname test received signal ".($? & 127)."\n";
+                                       return ABORT;
+                               }
+                       }
+                       if ($ret >> 8 == 0) {
+                               if ($testname eq "deleted") {
+                                       if (-d $dir) {
+                                               print STDERR "mr error: $dir should be deleted yet still exists\n";
+                                               return FAILED;
+                                       }
+                               }
+                               print "mr $action: skip $dir skipped\n" if $verbose;
+                               return SKIPPED;
+                       }
+               }
+       }

 
 

-       if ($action eq 'checkout') {
-               if (-d $dir) {
-                       print "mr $action: $dir already exists, skipping checkout\n" if $verbose;
-                       push @skipped, $dir;
-                       return;
+       if ($is_checkout) {
+               $checkout_dir=$dir;
+               if (! $force_checkout) {
+                       if (-d $dir) {
+                               print "mr $action: $dir already exists, skipping checkout\n" if $verbose;
+                               return SKIPPED;
+                       }
+       
+                       $dir=~s/^(.*)\/[^\/]+\/?$/$1/;

                }
                }

-               $dir=~s/^(.*)\/[^\/]+\/?$/$1/;

        }
        }

-       elsif ($action eq 'update') {
+       elsif ($is_update) {

                if (! -d $dir) {
                        return action("checkout", $dir, $topdir, $subdir);
                }
        }
                if (! -d $dir) {
                        return action("checkout", $dir, $topdir, $subdir);
                }
        }

-       
-       $ENV{MR_REPO}=$dir;
-
-       if (exists $config{$topdir}{$subdir}{skip}) {
-               my $test="set -e;".$lib.$config{$topdir}{$subdir}{skip};
-               print "mr $action: running skip test $test\n" if $verbose;
-               my $ret=system($test);
-               if ($ret >> 8 == 0) {
-                       print "mr $action: $dir skipped per config file\n" if $verbose;
-                       push @skipped, $dir;
-                       return;
-               }
+
+       my $command=findcommand($action, $dir, $topdir, $subdir, $is_checkout);
+
+       if ($is_checkout && ! -d $dir) {
+               print "mr $action: creating parent directory $dir\n" if $verbose;
+               system("mkdir", "-p", $dir);

        }
        }

-       
-       if (! $nochdir && ! chdir($dir)) {
+
+       if (! $no_chdir && ! chdir($dir)) {

                print STDERR "mr $action: failed to chdir to $dir: $!\n";
                print STDERR "mr $action: failed to chdir to $dir: $!\n";

-               push @failed, $dir;
+               return FAILED;

        }
        }

-       elsif (! exists $config{$topdir}{$subdir}{$action}) {
-               print STDERR "mr $action: no defined $action command for $topdir$subdir, skipping\n";
-               push @skipped, $dir;
+       elsif (! defined $command) {
+               my $vcs=vcs_test(@_);
+               if (! defined $vcs) {
+                       print STDERR "mr $action: unknown repository type and no defined $action command for $fulldir\n";
+                       return FAILED;
+               }
+               else {
+                       print STDERR "mr $action: no defined action for $vcs repository $fulldir, skipping\n" unless $minimal;
+                       return SKIPPED;
+               }

        }
        else {
        }
        else {

-               if (! $nochdir) {
-                       print "mr $action: $topdir$subdir\n";
+               my $actionmsg;
+               if (! $no_chdir) {
+                       $actionmsg="mr $action: $fulldir";

                }
                else {
                }
                else {

-                       print "mr $action: $topdir$subdir (in subdir $directory)\n";
+                       my $s=$directory;
+                       $s=~s/^\Q$fulldir\E\/?//;
+                       $actionmsg="mr $action: $fulldir (in subdir $s)";

                }
                }

-               my $command="set -e; ".$lib.
-                       "my_action(){ $config{$topdir}{$subdir}{$action} ; }; my_action ".
-                       join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
-               print STDERR "mr $action: running $command\n" if $verbose;
-               my $ret=system($command);
+               print "$actionmsg\n" unless $quiet || $minimal;
+
+               my ($hookret, $hook_out)=hook("pre_$action", $topdir, $subdir);
+               return $hookret if $hookret != OK;
+
+               my ($ret, $out)=runsh $action, $topdir, $subdir,
+                       $command, \@ARGV, sub {
+                               my $sh=shift;
+                               if (!$jobs || $jobs > 1 || $quiet || $minimal) {
+                                       return terminal_friendly_spawn($actionmsg, $sh, $quiet, $minimal);
+                               }
+                               else {
+                                       system($sh);
+                               }
+                       };

                if ($ret != 0) {
                if ($ret != 0) {

+                       if (($? & 127) == 2) {
+                               print STDERR "mr $action: interrupted\n";
+                               return ABORT;
+                       }
+                       elsif ($? & 127) {
+                               print STDERR "mr $action: received signal ".($? & 127)."\n";
+                               return ABORT;
+                       }

                        print STDERR "mr $action: failed ($ret)\n" if $verbose;
                        print STDERR "mr $action: failed ($ret)\n" if $verbose;

-                       push @failed, $dir;

                        if ($ret >> 8 != 0) {
                                print STDERR "mr $action: command failed\n";
                        if ($ret >> 8 != 0) {
                                print STDERR "mr $action: command failed\n";

+                               if (-e "$ENV{HOME}/.mrlog" && $action ne 'remember') {
+                                       # recreate original command line to
+                                       # remember, and avoid recursing
+                                       my @orig=@ARGV;
+                                       @ARGV=('-n', $action, @orig);
+                                       action("remember", $dir, $topdir, $subdir);
+                                       @ARGV=@orig;
+                               }

                        }
                        elsif ($ret != 0) {
                                print STDERR "mr $action: command died ($ret)\n";
                        }
                        }
                        elsif ($ret != 0) {
                                print STDERR "mr $action: command died ($ret)\n";
                        }

+                       return FAILED;

                }
                else {
                }
                else {

-                       push @successful, $dir;
-               }
+                       if ($is_checkout && ! -d $dir) {
+                               print STDERR "mr $action: $dir missing after checkout\n";;
+                               return FAILED;
+                       }

 
 

-               print "\n";
+                       my ($ret, $hook_out)=hook("post_$action", $topdir, $subdir);
+                       return $ret if $ret != OK;
+                       
+                       if ($is_checkout || $is_update) {
+                               if ($is_checkout && ! $no_chdir) {
+                                       if (! chdir($checkout_dir)) {
+                                               print STDERR "mr $action: failed to chdir to $checkout_dir: $!\n";
+                                               return FAILED;
+                                       }
+                               }
+                               my ($ret, $hook_out)=hook("fixups", $topdir, $subdir);
+                               return $ret if $ret != OK;
+                       }
+                       
+                       return (OK, $out || $hook_out);
+               }

        }
 }
 
        }
 }
 

-sub showstat {
-       my $count=shift;
-       my $singular=shift;
-       my $plural=shift;
-       if ($count) {
-               return "$count ".($count > 1 ? $plural : $singular);
+sub hook {
+       my ($hook, $topdir, $subdir) = @_;
+
+       my $command=$config{$topdir}{$subdir}{$hook};
+       return OK unless defined $command;
+       my ($ret,$out)=runsh $hook, $topdir, $subdir, $command, [], sub {
+                       my $sh=shift;
+                       if (!$jobs || $jobs > 1 || $quiet || $minimal) {
+                               return terminal_friendly_spawn(undef, $sh, $quiet, $minimal);
+                       }
+                       else {
+                               system($sh);
+                       }
+               };
+       if ($ret != 0) {
+               if (($? & 127) == 2) {
+                       print STDERR "mr $hook: interrupted\n";
+                       return ABORT;
+               }
+               elsif ($? & 127) {
+                       print STDERR "mr $hook: received signal ".($? & 127)."\n";
+                       return ABORT;
+               }
+               else {
+                       return FAILED;
+               }

        }
        }

-       return;
-}
-if (! @successful && ! @failed && ! @skipped) {
-       die "mr $action: no repositories found to work on\n";
-}
-print "mr $action: finished (".join("; ",
-       showstat($#successful+1, "successful", "successful"),
-       showstat($#failed+1, "failed", "failed"),
-       showstat($#skipped+1, "skipped", "skipped"),
-).")\n";
-if (@failed) {
-       exit 1;
+
+       return (OK, $out);

 }
 }

-elsif (! @successful && @skipped) {
-       exit 1;
+
+# run actions on multiple repos, in parallel
+sub mrs {
+       my $action=shift;
+       my @repos=@_;
+
+       $| = 1;
+       my @active;
+       my @fhs;
+       my @out;
+       my $running=0;
+       while (@fhs or @repos) {
+               while ((!$jobs || $running < $jobs) && @repos) {
+                       $running++;
+                       my $repo = shift @repos;
+                       pipe(my $outfh, CHILD_STDOUT);
+                       pipe(my $errfh, CHILD_STDERR);
+                       my $pid;
+                       unless ($pid = fork) {
+                               die "mr $action: cannot fork: $!" unless defined $pid;
+                               open(STDOUT, ">&CHILD_STDOUT") || die "mr $action cannot reopen stdout: $!";
+                               open(STDERR, ">&CHILD_STDERR") || die "mr $action cannot reopen stderr: $!";
+                               close CHILD_STDOUT;
+                               close CHILD_STDERR;
+                               close $outfh;
+                               close $errfh;
+                               exit +(action($action, @$repo))[0];
+                       }
+                       close CHILD_STDOUT;
+                       close CHILD_STDERR;
+                       push @active, [$pid, $repo];
+                       push @fhs, [$outfh, $errfh];
+                       push @out, ['',     ''];
+               }
+               my ($rin, $rout) = ('','');
+               my $nfound;
+               foreach my $fh (@fhs) {
+                       next unless defined $fh;
+                       vec($rin, fileno($fh->[0]), 1) = 1 if defined $fh->[0];
+                       vec($rin, fileno($fh->[1]), 1) = 1 if defined $fh->[1];
+               }
+               $nfound = select($rout=$rin, undef, undef, 1);
+               foreach my $channel (0, 1) {
+                       foreach my $i (0..$#fhs) {
+                               next unless defined $fhs[$i];
+                               my $fh = $fhs[$i][$channel];
+                               next unless defined $fh;
+                               if (vec($rout, fileno($fh), 1) == 1) {
+                                       my $r = '';
+                                       if (sysread($fh, $r, 1024) == 0) {
+                                               close($fh);
+                                               $fhs[$i][$channel] = undef;
+                                               if (! defined $fhs[$i][0] &&
+                                                   ! defined $fhs[$i][1]) {
+                                                       waitpid($active[$i][0], 0);
+                                                       print STDOUT $out[$i][0];
+                                                       print STDERR $out[$i][1];
+                                                       record($active[$i][1], $? >> 8, $out[$i][0] || $out[$i][1]);
+                                                       splice(@fhs, $i, 1);
+                                                       splice(@active, $i, 1);
+                                                       splice(@out, $i, 1);
+                                                       $running--;
+                                               }
+                                       }
+                                       $out[$i][$channel] .= $r;
+                               }
+                       }
+               }
+       }

 }
 }

-exit 0;

 
 

-my %loaded;
-sub loadconfig {
-       my $f=shift;
+sub record {
+       my $dir=shift()->[0];
+       my $ret=shift;
+       my $out=shift;
+
+       if ($ret == OK) {
+               push @ok, $dir;
+               print "\n" unless $quiet || ($minimal && !$out);
+       }
+       elsif ($ret == FAILED) {
+               if ($interactive) {
+                       chdir($dir) unless $no_chdir;
+                       print STDERR "mr: Starting interactive shell. Exit shell to continue.\n";
+                       system((getpwuid($<))[8], "-i");
+               }
+               push @failed, $dir;
+               print "\n";
+       }
+       elsif ($ret == SKIPPED) {
+               push @skipped, $dir;
+       }
+       elsif ($ret == ABORT) {
+               exit 1;
+       }
+       else {
+               die "unknown exit status $ret";
+       }
+}
+
+sub showstats {
+       my $action=shift;
+       if (! @ok && ! @failed && ! @skipped) {
+               die "mr $action: no repositories found to work on\n";
+       }
+       print "mr $action: finished (".join("; ",
+               showstat($#ok+1, "ok", "ok"),
+               showstat($#failed+1, "failed", "failed"),
+               showstat($#skipped+1, "skipped", "skipped"),
+       ).")\n" unless $quiet || $minimal;
+       if ($stats) {
+               if (@skipped) {
+                       print "mr $action: (skipped: ".join(" ", @skipped).")\n" unless $quiet || $minimal;
+               }
+               if (@failed) {
+                       print STDERR "mr $action: (failed: ".join(" ", @failed).")\n";
+               }
+       }
+}
+
+sub showstat {
+       my $count=shift;
+       my $singular=shift;
+       my $plural=shift;
+       if ($count) {
+               return "$count ".($count > 1 ? $plural : $singular);
+       }
+       return;
+}
+
+# an ordered list of repos
+sub repolist {
+       my @list;
+       foreach my $topdir (sort keys %config) {
+               foreach my $subdir (sort keys %{$config{$topdir}}) {
+                       push @list, {
+                               topdir => $topdir,
+                               subdir => $subdir,
+                               order => $config{$topdir}{$subdir}{order},
+                       };
+               }
+       }
+       return sort {
+               $a->{order}  <=> $b->{order}
+                            ||
+               $a->{topdir} cmp $b->{topdir}
+                            ||
+               $a->{subdir} cmp $b->{subdir}
+       } @list;
+}
+
+sub repodir {
+       my $repo=shift;
+       my $topdir=$repo->{topdir};
+       my $subdir=$repo->{subdir};
+       my $ret=($subdir =~/^\//) ? $subdir : $topdir.$subdir;
+       $ret=~s/\/\.$//;
+       return $ret;
+}
+
+# Figure out which repos to act on.  Returns a list of array refs
+# in the format:
+#
+#   [ "$full_repo_path/", "$mr_config_path/", $section_header ]
+sub selectrepos {
+       my @repos;
+       foreach my $repo (repolist()) {
+               my $topdir=$repo->{topdir};
+               my $subdir=$repo->{subdir};
+
+               next if $subdir eq 'DEFAULT';
+               my $dir=repodir($repo);
+               my $d=$directory;
+               $dir.="/" unless $dir=~/\/$/;
+               $d.="/" unless $d=~/\/$/;
+               next if $dir ne $d && $dir !~ /^\Q$d\E/;
+               if (defined $max_depth) {
+                       my @a=split('/', $dir);
+                       my @b=split('/', $d);
+                       do { } while (@a && @b && shift(@a) eq shift(@b));
+                       next if @a > $max_depth || @b > $max_depth;
+               }
+               push @repos, [$dir, $topdir, $subdir];
+       }
+       if (! @repos) {
+               # fallback to find a leaf repo
+               foreach my $repo (reverse repolist()) {
+                       my $topdir=$repo->{topdir};
+                       my $subdir=$repo->{subdir};
+                       
+                       next if $subdir eq 'DEFAULT';
+                       my $dir=repodir($repo);
+                       my $d=$directory;
+                       $dir.="/" unless $dir=~/\/$/;
+                       $d.="/" unless $d=~/\/$/;
+                       if ($d=~/^\Q$dir\E/) {
+                               push @repos, [$dir, $topdir, $subdir];
+                               last;
+                       }
+               }
+               $no_chdir=1;
+       }
+       return @repos;
+}
+
+sub expandenv {
+       my $val=shift;
+       
+
+       if ($val=~/\$/) {
+               $val=`echo "$val"`;
+               chomp $val;
+       }
+       
+       return $val;
+}
+
+my %trusted;
+sub is_trusted_config {
+       my $config=shift; # must be abs_pathed already
+
+       # We always trust ~/.mrconfig.
+       return 1 if $config eq abs_path($HOME_MR_CONFIG);
+
+       return 1 if $trust_all;
+
+       my $trustfile=$ENV{HOME}."/.mrtrust";
+
+       if (! %trusted) {
+               $trusted{$HOME_MR_CONFIG}=1;
+               if (open (TRUST, "<", $trustfile)) {
+                       while (<TRUST>) {
+                               chomp;
+                               s/^~\//$ENV{HOME}\//;
+                               my $d=abs_path($_);
+                               $trusted{$d}=1 if defined $d;
+                       }
+                       close TRUST;
+               }
+       }
+
+       return $trusted{$config};
+}
+
+
+sub is_trusted_repo {
+       my $repo=shift;
+       
+       # Tightly limit what is allowed in a repo name.
+       # No ../, no absolute paths, and no unusual filenames
+       # that might try to escape to the shell.
+       return $repo =~ /^[-_.+\/A-Za-z0-9]+$/ &&
+              $repo !~ /\.\./ && $repo !~ /^\//;
+}
+
+sub is_trusted_checkout {
+       my $command=shift;
+       
+       # To determine if the command is safe, compare it with the
+       # *_trusted_checkout config settings. Those settings are
+       # templates for allowed commands, so make sure that each word
+       # of the command matches the corresponding word of the template.
+       
+       my @words;
+       foreach my $word (split(' ', $command)) {
+               # strip quoting
+               if ($word=~/^'(.*)'$/) {
+                       $word=$1;
+               }
+               elsif ($word=~/^"(.*)"$/) {
+                       $word=$1;
+               }
+
+               push @words, $word;
+       }
+
+       foreach my $key (grep { /_trusted_checkout$/ }
+                        keys %{$config{''}{DEFAULT}}) {
+               my @twords=split(' ', $config{''}{DEFAULT}{$key});
+               next if @words > @twords;
+
+               my $match=1;
+               my $url;
+               for (my $c=0; $c < @twords && $match; $c++) {
+                       if ($twords[$c] eq '$url') {
+                               # Match all the typical characters found in
+                               # urls, plus @ which svn can use. Note
+                               # that the "url" might also be a local
+                               # directory.
+                               $match=(
+                                       defined $words[$c] &&
+                                       $words[$c] =~ /^[-_.+:@\/A-Za-z0-9]+$/
+                               );
+                               $url=$words[$c];
+                       }
+                       elsif ($twords[$c] eq '$repo') {
+                               # If a repo is not specified, assume it
+                               # will be the last path component of the
+                               # url, or something derived from it, and
+                               # check that.
+                               if (! defined $words[$c] && defined $url) {
+                                       ($words[$c])=$url=~/\/([^\/]+)\/?$/;
+                               }
+
+                               $match=(
+                                       defined $words[$c] &&
+                                       is_trusted_repo($words[$c])
+                               );
+                       }
+                       elsif (defined $words[$c] && $words[$c]=~/^($twords[$c])$/) {
+                               $match=1;
+                       }
+                       else {
+                               $match=0;
+                       }
+               }
+               return 1 if $match;
+       }
+
+       return 0;
+}
+
+my %loaded;
+sub loadconfig {
+       my $f=shift;
+       my $dir=shift;
+       my $bootstrap_src=shift;

 
        my @toload;
 
        my $in;
 
        my @toload;
 
        my $in;

-       my $dir;
+       my $trusted;

        if (ref $f eq 'GLOB') {
        if (ref $f eq 'GLOB') {

-               $in=$f; 

                $dir="";
                $dir="";

+               $in=$f;
+               $trusted=1;

        }
        else {
        }
        else {

-               # $f might be a symlink

                my $absf=abs_path($f);
                if ($loaded{$absf}) {
                        return;
                }
                $loaded{$absf}=1;
 
                my $absf=abs_path($f);
                if ($loaded{$absf}) {
                        return;
                }
                $loaded{$absf}=1;
 

-               print "mr: loading config $f\n" if $verbose;
-               open($in, "<", $f) || die "mr: open $f: $!\n";
-               ($dir)=$f=~/^(.*\/)[^\/]+$/;
+               $trusted=is_trusted_config($absf);
+

                if (! defined $dir) {
                if (! defined $dir) {

-                       $dir=".";
+                       ($dir)=$f=~/^(.*\/)[^\/]+$/;
+                       if (! defined $dir) {
+                               $dir=".";
+                       }

                }
                }

+

                $dir=abs_path($dir)."/";
                $dir=abs_path($dir)."/";

+               
+               if (! exists $configfiles{$dir}) {
+                       $configfiles{$dir}=$f;
+               }

 
                # copy in defaults from first parent
                my $parent=$dir;
 
                # copy in defaults from first parent
                my $parent=$dir;

-               while ($parent=~s/^(.*)\/[^\/]+\/?$/$1/) {
+               while ($parent=~s/^(.*\/)[^\/]+\/?$/$1/) {
+                       if ($parent eq '/') {
+                               $parent="";
+                       }

                        if (exists $config{$parent} &&
                            exists $config{$parent}{DEFAULT}) {
                                $config{$dir}{DEFAULT}={ %{$config{$parent}{DEFAULT}} };
                                last;
                        }
                }
                        if (exists $config{$parent} &&
                            exists $config{$parent}{DEFAULT}) {
                                $config{$dir}{DEFAULT}={ %{$config{$parent}{DEFAULT}} };
                                last;
                        }
                }

+               
+               if (! -e $f) {
+                       return;
+               }
+
+               print "mr: loading config $f\n" if $verbose;
+               open($in, "<", $f) || die "mr: open $f: $!\n";

        }
        }

+       my @lines=<$in>;
+       close $in unless ref $f eq 'GLOB';

 
        my $section;
 
        my $section;

-       while (<$in>) {
-               chomp;
+
+       # Keep track of the current line in the config file;
+       # when a file is included track the current line from the include.
+       my $lineno=0;
+       my $included=undef;
+
+       my $line;
+       my $nextline = sub {
+               if ($included) {
+                       $included--;
+               }
+               else {
+                       $included=undef;
+                       $lineno++;
+               }
+               $line=shift @lines;
+               chomp $line;
+               return $line;
+       };
+       my $lineerror = sub {
+               my $msg=shift;
+               if (defined $included) {
+                       die "mr: $msg at $f line $lineno, included line: $line\n";
+               }
+               else {
+                       die "mr: $msg at $f line $lineno\n";
+               }
+       };
+       my $trusterror = sub {
+               my $msg=shift;
+       
+               if (defined $bootstrap_src) {
+                       die "mr: $msg in untrusted $bootstrap_src line $lineno\n".
+                               "(To trust this url, --trust-all can be used; but please use caution;\n".
+                               "this can allow arbitrary code execution!)\n";
+               }
+               else {
+                       die "mr: $msg in untrusted $f line $lineno\n".
+                               "(To trust this file, list it in ~/.mrtrust.)\n";
+               }
+       };
+
+       while (@lines) {
+               $_=$nextline->();
+

                next if /^\s*\#/ || /^\s*$/;
                next if /^\s*\#/ || /^\s*$/;

-               if (/^\s*\[([^\]]*)\]\s*$/) {
-                       $section=$1;
+
+               if (! $trusted && /[[:cntrl:]]/) {
+                       $trusterror->("illegal control character");

                }
                }

-               elsif (/^\s*(\w+)\s*=\s*(.*)/) {
-                       my $parameter=$1;
-                       my $value=$2;

 
 

-                       # continuation line
-                       while ($value=~/(.*)\\$/) {
-                               $value=$1.<$in>;
-                               chomp $value;
-                       }
+               if (/^\[([^\]]*)\]\s*$/) {
+                       $section=$1;

 
 

-                       if (! defined $section) {
-                               die "$f line $.: parameter ($parameter) not in section\n";
+                       if (! $trusted) {
+                               if (! is_trusted_repo($section) ||
+                                   $section eq 'ALIAS' ||
+                                   $section eq 'DEFAULT') {
+                                       $trusterror->("illegal section \"[$section]\"");
+                               }

                        }
                        }

+                       $section=expandenv($section) if $trusted;

                        if ($section ne 'ALIAS' &&
                            ! exists $config{$dir}{$section} &&
                            exists $config{$dir}{DEFAULT}) {
                                # copy in defaults
                                $config{$dir}{$section}={ %{$config{$dir}{DEFAULT}} };
                        }
                        if ($section ne 'ALIAS' &&
                            ! exists $config{$dir}{$section} &&
                            exists $config{$dir}{DEFAULT}) {
                                # copy in defaults
                                $config{$dir}{$section}={ %{$config{$dir}{DEFAULT}} };
                        }

+               }
+               elsif (/^(\w+)\s*=\s*(.*)/) {
+                       my $parameter=$1;
+                       my $value=$2;
+
+                       # continued value
+                       while (@lines && $lines[0]=~/^\s(.+)/) {
+                               $value.="\n$1";
+                               chomp $value;
+                               $nextline->();
+                       }
+
+                       if (! $trusted) {
+                               # Untrusted files can only contain a few
+                               # settings in specific known-safe formats.
+                               if ($parameter eq 'checkout') {
+                                       if (! is_trusted_checkout($value)) {
+                                               $trusterror->("illegal checkout command \"$value\"");
+                                       }
+                               }
+                               elsif ($parameter eq 'order') {
+                                       # not interpreted as a command, so
+                                       # safe.
+                               }
+                               elsif ($value eq 'true' || $value eq 'false') {
+                                       # skip=true , deleted=true etc are
+                                       # safe.
+                               }
+                               else {
+                                       $trusterror->("illegal setting \"$parameter=$value\"");
+                               }
+                       }
+
+                       if ($parameter eq "include") {
+                               print "mr: including output of \"$value\"\n" if $verbose;
+                               my @inc=`$value`;
+                               if ($?) {
+                                       print STDERR "mr: include command exited nonzero ($?)\n";
+                               }
+                               $included += @inc;
+                               unshift @lines, @inc;
+                               next;
+                       }
+
+                       if (! defined $section) {
+                               $lineerror->("parameter ($parameter) not in section");
+                       }

                        if ($section eq 'ALIAS') {
                                $alias{$parameter}=$value;
                        }
                        if ($section eq 'ALIAS') {
                                $alias{$parameter}=$value;
                        }

-                       elsif ($parameter eq 'lib') {
-                               $config{$dir}{$section}{lib}.=$value." ; ";
+                       elsif ($parameter eq 'lib' or $parameter =~ s/_append$//) {
+                               $config{$dir}{$section}{$parameter}.="\n".$value."\n";

                        }
                        else {
                                $config{$dir}{$section}{$parameter}=$value;
                        }
                        else {
                                $config{$dir}{$section}{$parameter}=$value;

-                               $knownactions{$parameter}=1;
+                               if ($parameter =~ /.*_(.*)/) {
+                                       $knownactions{$1}=1;
+                               }
+                               else {
+                                       $knownactions{$parameter}=1;
+                               }

                                if ($parameter eq 'chain' &&
                                if ($parameter eq 'chain' &&

-                                   length $dir && $section ne "DEFAULT" &&
-                                   -e $dir.$section."/.mrconfig" &&
-                                   system($value) >> 8 == 0) {
-                                       push @toload, $dir.$section."/.mrconfig";
+                                   length $dir && $section ne "DEFAULT") {
+                                       my $chaindir="$section";
+                                       if ($chaindir !~ m!^/!) {
+                                               $chaindir=$dir.$chaindir;
+                                       }
+                                       if (-e "$chaindir/.mrconfig") {
+                                               my $ret=system($value);
+                                               if ($ret != 0) {
+                                                       if (($? & 127) == 2) {
+                                                               print STDERR "mr: chain test interrupted\n";
+                                                               exit 2;
+                                                       }
+                                                       elsif ($? & 127) {
+                                                               print STDERR "mr: chain test received signal ".($? & 127)."\n";
+                                                       }
+                                               }
+                                               else {
+                                                       push @toload, ["$chaindir/.mrconfig", $chaindir];
+                                               }
+                                       }

                                }
                        }
                }
                else {
                                }
                        }
                }
                else {

-                       die "$f line $.: parse error\n";
+                       $lineerror->("parse error");
+               }
+       }
+
+       foreach my $c (@toload) {
+               loadconfig(@$c);
+       }
+}
+
+sub startingconfig {
+       %alias=%config=%configfiles=%knownactions=%loaded=();
+       my $datapos=tell(DATA);
+       loadconfig(\*DATA);
+       seek(DATA,$datapos,0); # rewind
+}
+
+sub modifyconfig {
+       my $f=shift;
+       # the section to modify or add
+       my $targetsection=shift;
+       # fields to change in the section
+       # To remove a field, set its value to "".
+       my %changefields=@_;
+
+       my @lines;
+       my @out;
+
+       if (-e $f) {
+               open(my $in, "<", $f) || die "mr: open $f: $!\n";
+               @lines=<$in>;
+               close $in;
+       }
+
+       my $formatfield=sub {
+               my $field=shift;
+               my @value=split(/\n/, shift);
+
+               return "$field = ".shift(@value)."\n".
+                       join("", map { "\t$_\n" } @value);
+       };
+       my $addfields=sub {
+               my @blanks;
+               while ($out[$#out] =~ /^\s*$/) {
+                       unshift @blanks, pop @out;
+               }
+               foreach my $field (sort keys %changefields) {
+                       if (length $changefields{$field}) {
+                               push @out, "$field = $changefields{$field}\n";
+                               delete $changefields{$field};
+                       }
+               }
+               push @out, @blanks;
+       };
+
+       my $section;
+       while (@lines) {
+               $_=shift(@lines);
+
+               if (/^\s*\#/ || /^\s*$/) {
+                       push @out, $_;
+               }
+               elsif (/^\[([^\]]*)\]\s*$/) {
+                       if (defined $section && 
+                           $section eq $targetsection) {
+                               $addfields->();
+                       }
+
+                       $section=expandenv($1);
+
+                       push @out, $_;
+               }
+               elsif (/^(\w+)\s*=\s(.*)/) {
+                       my $parameter=$1;
+                       my $value=$2;
+
+                       # continued value
+                       while (@lines && $lines[0]=~/^\s(.+)/) {
+                               shift(@lines);
+                               $value.="\n$1";
+                               chomp $value;
+                       }
+
+                       if ($section eq $targetsection) {
+                               if (exists $changefields{$parameter}) {
+                                       if (length $changefields{$parameter}) {
+                                               $value=$changefields{$parameter};
+                                       }
+                                       delete $changefields{$parameter};
+                               }
+                       }
+
+                       push @out, $formatfield->($parameter, $value);
+               }
+       }
+
+       if (defined $section && 
+           $section eq $targetsection) {
+               $addfields->();
+       }
+       elsif (%changefields) {
+               push @out, "\n[$targetsection]\n";
+               foreach my $field (sort keys %changefields) {
+                       if (length $changefields{$field}) {
+                               push @out, $formatfield->($field, $changefields{$field});
+                       }
+               }
+       }
+
+       open(my $out, ">", $f) || die "mr: write $f: $!\n";
+       print $out @out;
+       close $out;     
+}
+
+sub dispatch {
+       my $action=shift;
+
+       # actions that do not operate on all repos
+       if ($action eq 'config') {
+               config(@ARGV);
+       }
+       elsif ($action eq 'register') {
+               register(@ARGV);
+       }
+       elsif ($action eq 'bootstrap') {
+               bootstrap();
+       }
+       elsif ($action eq 'remember' ||
+              $action eq 'offline' ||
+              $action eq 'online') {
+               my @repos=selectrepos;
+               action($action, @{$repos[0]}) if @repos;
+               exit 0;
+       }
+
+       if (!$jobs || $jobs > 1) {
+               mrs($action, selectrepos());
+       }
+       else {
+               foreach my $repo (selectrepos()) {
+                       record($repo, action($action, @$repo));
+               }
+       }
+}
+
+sub help {
+       my $help=q#
+               case `uname -s` in
+                       SunOS)
+                       SHOWMANFILE="man -f"
+                       ;;
+                       Darwin)
+                       SHOWMANFILE="man"
+                       ;;
+                       *)
+                       SHOWMANFILE="man"
+                       ;;
+               esac
+               if [ ! -e "$MR_PATH" ]; then
+                       error "cannot find program path"
+               fi
+               tmp=$(mktemp -t mr.XXXXXXXXXX) || error "mktemp failed"
+               trap "rm -f $tmp" exit
+               pod2man -c mr "$MR_PATH" > "$tmp" || error "pod2man failed"
+               $SHOWMANFILE "$tmp" || error "man failed"
+       #;
+       exec($help) || die "exec: $!";
+}
+
+sub config {
+       if (@_ < 2) {
+               die "mr config: not enough parameters\n";
+       }
+       my $section=shift;
+       if ($section=~/^\//) {
+               # try to convert to a path relative to the config file
+               my ($dir)=$ENV{MR_CONFIG}=~/^(.*\/)[^\/]+$/;
+               $dir=abs_path($dir);
+               $dir.="/" unless $dir=~/\/$/;
+               if ($section=~/^\Q$dir\E(.*)/) {
+                       $section=$1;
+               }
+       }
+       my %changefields;
+       foreach (@_) {
+               if (/^([^=]+)=(.*)$/) {
+                       $changefields{$1}=$2;
+               }
+               else {
+                       my $found=0;
+                       foreach my $topdir (sort keys %config) {
+                               if (exists $config{$topdir}{$section} &&
+                                   exists $config{$topdir}{$section}{$_}) {
+                                       print $config{$topdir}{$section}{$_}."\n";
+                                       $found=1;
+                                       last if $section eq 'DEFAULT';
+                               }
+                       }
+                       if (! $found) {
+                               die "mr config: $section $_ not set\n";
+                       }
+               }
+       }
+       modifyconfig($ENV{MR_CONFIG}, $section, %changefields) if %changefields;
+       exit 0;
+}
+
+sub register {
+       if ($config_overridden) {
+               # Find the directory that the specified config file is
+               # located in.
+               ($directory)=abs_path($ENV{MR_CONFIG})=~/^(.*\/)[^\/]+$/;
+       }
+       else {
+               # Find the closest known mrconfig file to the current
+               # directory.
+               $directory.="/" unless $directory=~/\/$/;
+               my $foundconfig=0;
+               foreach my $topdir (reverse sort keys %config) {
+                       next unless length $topdir;
+                       if ($directory=~/^\Q$topdir\E/) {
+                               $ENV{MR_CONFIG}=$configfiles{$topdir};
+                               $directory=$topdir;
+                               $foundconfig=1;
+                               last;
+                       }
+               }
+               if (! $foundconfig) {
+                       $directory=""; # no config file, use builtin
+               }
+       }
+       if (@ARGV) {
+               my $subdir=shift @ARGV;
+               if (! chdir($subdir)) {
+                       print STDERR "mr register: failed to chdir to $subdir: $!\n";

                }
        }
                }
        }

-       close $in;

 
 

-       foreach (@toload) {
-               loadconfig($_);
+       $ENV{MR_REPO}=getcwd();
+       my $command=findcommand("register", $ENV{MR_REPO}, $directory, 'DEFAULT', 0);
+       if (! defined $command) {
+               die "mr register: unknown repository type\n";

        }
        }

+
+       $ENV{MR_REPO}=~s/.*\/(.*)/$1/;
+       $command="set -e; ".$config{$directory}{DEFAULT}{lib}."\n".
+               "my_action(){ $command\n }; my_action ".
+               join(" ", map { s/\\/\\\\/g; s/"/\"/g; '"'.$_.'"' } @ARGV);
+       print "mr register: running >>$command<<\n" if $verbose;
+       exec($command) || die "exec: $!";
+}
+
+sub bootstrap {
+       eval q{use File::Copy};
+       die $@ if $@;
+
+       my $src=shift @ARGV;
+       my $dir=shift @ARGV || ".";
+       
+       if (! defined $src || ! length $src) {
+               die "mr: bootstrap requires source\n";
+       }
+
+       # Retrieve config file.
+       eval q{use File::Temp};
+       die $@ if $@;
+       my $tmpconfig=File::Temp->new();
+       if ($src =~ m!^[\w\d]+://!) {
+               # Download the config file to a temporary location.
+               my @downloader;
+               if ($src =~ m!^ssh://(.*)!) {
+                       @downloader = ("scp", $1, $tmpconfig);
+               }
+               else {
+                       @downloader = ("curl", "-A", "mr", "-L", "-s", $src, "-o", $tmpconfig);
+                       push(@downloader, "-k") if $insecure;
+               }
+               my $status = system(@downloader);
+               die "mr bootstrap: invalid SSL certificate for $src (consider -k)\n"
+                       if $downloader[0] eq 'curl' && $status >> 8 == 60;
+               die "mr bootstrap: download of $src failed\n" if $status != 0;
+       }
+       elsif ($src eq '-') {
+               # Config file is read from stdin.
+               copy(\*STDIN, $tmpconfig) || die "stdin: $!";
+       }
+       else {
+               # Config file is local.
+               die "mr bootstrap: cannot read file '$src'"
+                       unless -r $src;
+               copy($src, $tmpconfig) || die "copy: $!";
+       }
+
+       # Sanity check on destination directory.
+       if (! -e $dir) {
+               system("mkdir", "-p", $dir);
+       }
+       chdir($dir) || die "chdir $dir: $!";
+
+       # Special case to handle checkout of the "." repo, which 
+       # would normally be skipped.
+       my $topdir=abs_path(".")."/";
+       my @repo=($topdir, $topdir, ".");
+       loadconfig($tmpconfig, $topdir, $src);
+       record(\@repo, action("checkout", @repo, 1))
+               if exists $config{$topdir}{"."}{"checkout"};
+
+       if (-e ".mrconfig") {
+               print STDERR "mr bootstrap: .mrconfig file already exists, not overwriting with $src\n";
+       }
+       else {
+               move($tmpconfig, ".mrconfig") || die "rename: $!";
+       }
+
+       # Reload the config file (in case we got a different version)
+       # and checkout everything else.
+       startingconfig();
+       loadconfig(".mrconfig");
+       dispatch("checkout");
+       @skipped=grep { abs_path($_) ne abs_path($topdir) } @skipped;
+       showstats("bootstrap");
+       exitstats();
+}
+
+# alias expansion and command stemming
+sub expandaction {
+       my $action=shift;
+       if (exists $alias{$action}) {
+               $action=$alias{$action};
+       }
+       if (! exists $knownactions{$action}) {
+               my @matches = grep { /^\Q$action\E/ }
+                       keys %knownactions, keys %alias;
+               if (@matches == 1) {
+                       $action=$matches[0];
+               }
+               elsif (@matches == 0) {
+                       die "mr: unknown action \"$action\" (known actions: ".
+                               join(", ", sort keys %knownactions).")\n";
+               }
+               else {
+                       die "mr: ambiguous action \"$action\" (matches: ".
+                               join(", ", @matches).")\n";
+               }
+       }
+       return $action;
+}
+
+sub find_mrconfig {
+       my $dir=getcwd();
+       while (length $dir) {
+               if (-e "$dir/.mrconfig") {
+                       return "$dir/.mrconfig";
+               }
+               $dir=~s/\/[^\/]*$//;
+       }
+       return $HOME_MR_CONFIG;
+}
+
+sub getopts {
+       my @saved=@ARGV;
+       Getopt::Long::Configure("bundling", "no_permute");
+       my $result=GetOptions(
+               "d|directory=s" => sub { $directory=abs_path($_[1]) },
+               "c|config=s" => sub { $ENV{MR_CONFIG}=$_[1]; $config_overridden=1 },
+               "p|path" => sub { }, # now default, ignore
+               "f|force" => \$force,
+               "v|verbose" => \$verbose,
+               "m|minimal" => \$minimal,
+               "q|quiet" => \$quiet,
+               "s|stats" => \$stats,
+               "k|insecure" => \$insecure,
+               "i|interactive" => \$interactive,
+               "n|no-recurse:i" => \$max_depth,
+               "j|jobs:i" => \$jobs,
+               "t|trust-all" => \$trust_all,
+       );
+       if (! $result || @ARGV < 1) {
+               die("Usage: mr [options] action [params ...]\n".
+                   "(Use mr help for man page.)\n");
+       }
+       
+       $ENV{MR_SWITCHES}="";
+       foreach my $option (@saved) {
+               last if $option eq $ARGV[0];
+               $ENV{MR_SWITCHES}.="$option ";
+       }
+}
+
+sub init {
+       $SIG{INT}=sub {
+               print STDERR "mr: interrupted\n";
+               exit 2;
+       };
+       
+       # This can happen if it's run in a directory that was removed
+       # or other strangeness.
+       if (! defined $directory) {
+               die("mr: failed to determine working directory\n");
+       }
+       # Make sure MR_CONFIG is an absolute path, but don't use abs_path since
+       # the config file might be a symlink to elsewhere, and the directory it's
+       # in is significant.
+       if ($ENV{MR_CONFIG} !~ /^\//) {
+               $ENV{MR_CONFIG}=getcwd()."/".$ENV{MR_CONFIG};
+       }
+       # Try to set MR_PATH to the path to the program.
+       eval {
+               use FindBin qw($Bin $Script);
+               $ENV{MR_PATH}=$Bin."/".$Script;
+       };
+}
+       
+sub exitstats {
+       if (@failed) {
+               exit 1;
+       }
+       else {
+               exit 0;
+       }
+}
+
+sub main {
+       getopts();
+       init();
+       help(@ARGV) if $ARGV[0] eq 'help';
+
+       startingconfig();
+       loadconfig($HOME_MR_CONFIG);
+       loadconfig($ENV{MR_CONFIG});
+       #use Data::Dumper; print Dumper(\%config);
+       
+       my $action=expandaction(shift @ARGV);
+       dispatch($action);
+
+       showstats($action);
+       exitstats();

 }
 
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
 __DATA__
 [ALIAS]
 }
 
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
 __DATA__
 [ALIAS]

-       co = checkout
-       ci = commit
-       ls = list
+co = checkout
+ci = commit
+ls = list

 
 [DEFAULT]
 
 [DEFAULT]

-lib = \
-       error() { \
-               echo "mr: $@" >&2; \
-               exit 1; \
-       }
-
-update = \
-       if [ -d "$MR_REPO"/.svn ]; then \
-               svn update "$@"; \
-       elif [ -d "$MR_REPO"/.git ]; then \
-               git pull origin master "$@"; \
-       elif [ -d "$MR_REPO"/.bzr ]; then \
-               bzr merge "$@"; \
-       elif [ -d "$MR_REPO"/CVS ]; then \
-               cvs update "$@"; \
-       else \
-               error "unknown repo type"; \
+order = 10
+lib =
+       error() {
+               echo "mr: $@" >&2
+               exit 1
+       }
+       warning() {
+               echo "mr (warning): $@" >&2
+       }
+       info() {
+               echo "mr: $@" >&2
+       }
+       hours_since() {
+               if [ -z "$1" ] || [ -z "$2" ]; then
+                       error "mr: usage: hours_since action num"
+               fi
+               for dir in .git .svn .bzr CVS .hg _darcs _FOSSIL_; do
+                       if [ -e "$MR_REPO/$dir" ]; then
+                               flagfile="$MR_REPO/$dir/.mr_last$1"
+                               break
+                       fi
+               done
+               if [ -z "$flagfile" ]; then
+                       error "cannot determine flag filename"
+               fi
+               delta=`perl -wle 'print -f shift() ? int((-M _) * 24) : 9999' "$flagfile"`
+               if [ "$delta" -lt "$2" ]; then
+                       return 1
+               else
+                       touch "$flagfile"
+                       return 0
+               fi
+       }
+       is_bzr_checkout() {
+               LANG=C bzr info | egrep -q '^Checkout'
+       }
+       lazy() {
+               if [ -d "$MR_REPO" ]; then
+                       return 1
+               else
+                       return 0
+               fi
+       }
+
+svn_test = perl: -d "$ENV{MR_REPO}/.svn"
+git_test = perl: -e "$ENV{MR_REPO}/.git"
+bzr_test = perl: -d "$ENV{MR_REPO}/.bzr"
+cvs_test = perl: -d "$ENV{MR_REPO}/CVS"
+hg_test  = perl: -d "$ENV{MR_REPO}/.hg"
+darcs_test = perl: -d "$ENV{MR_REPO}/_darcs"
+fossil_test = perl: -f "$ENV{MR_REPO}/_FOSSIL_"
+git_bare_test = perl: 
+       -d "$ENV{MR_REPO}/refs/heads" && -d "$ENV{MR_REPO}/refs/tags" &&
+       -d "$ENV{MR_REPO}/objects" && -f "$ENV{MR_REPO}/config" &&
+       `GIT_CONFIG="$ENV{MR_REPO}"/config git config --get core.bare` =~ /true/
+vcsh_test = perl:
+       -d "$ENV{MR_REPO}/refs/heads" && -d "$ENV{MR_REPO}/refs/tags" &&
+       -d "$ENV{MR_REPO}/objects" && -f "$ENV{MR_REPO}/config" &&
+       `GIT_CONFIG="$ENV{MR_REPO}"/config git config --get vcsh.vcsh` =~ /true/
+veracity_test  = perl: -d "$ENV{MR_REPO}/.sgdrawer"
+
+svn_update = svn update "$@"
+git_update = git pull "$@"
+bzr_update = 
+       if is_bzr_checkout; then
+               bzr update "$@"
+       else
+               bzr merge --pull "$@"

        fi
        fi

-status = \
-       if [ -d "$MR_REPO"/.svn ]; then \
-               svn status "$@"; \
-       elif [ -d "$MR_REPO"/.git ]; then \
-               git status "$@" || true; \
-       elif [ -d "$MR_REPO"/.bzr ]; then \
-               bzr status "$@"; \
-       elif [ -d "$MR_REPO"/CVS ]; then \
-               cvs status "$@"; \
-       else \
-               error "unknown repo type"; \
+cvs_update = cvs -q update "$@"
+hg_update  = hg pull "$@"; hg update "$@"
+darcs_update = darcs pull -a "$@"
+fossil_update = fossil pull "$@"
+vcsh_update = vcsh run "$MR_REPO" git pull "$@"
+veracity_update = vv pull "$@" && vv update "$@"
+
+git_fetch = git fetch --all --prune --tags
+git_svn_fetch = git svn fetch
+darcs_fetch = darcs fetch
+hg_fetch = hg pull
+
+svn_clean = 
+       if [ "x$1" = x-f ] ; then
+               shift
+               svn-clean "$@"
+       else
+               svn-clean --print "$@"

        fi
        fi

-commit = \
-       if [ -d "$MR_REPO"/.svn ]; then \
-               svn commit "$@"; \
-       elif [ -d "$MR_REPO"/.git ]; then \
-               git commit -a "$@" && git push --all; \
-       elif [ -d "$MR_REPO"/.bzr ]; then \
-               bzr commit "$@" && bzr push; \
-       elif [ -d "$MR_REPO"/CVS ]; then \
-               cvs commit "$@"; \
-       else \
-               error "unknown repo type"; \
+git_clean = 
+       if [ "x$1" = x-f ] ; then
+               shift
+               git clean -dx --force "$@"
+       else
+               git clean -dx --dry-run "$@"

        fi
        fi

-diff = \
-       if [ -d "$MR_REPO"/.svn ]; then \
-               svn diff "$@"; \
-       elif [ -d "$MR_REPO"/.git ]; then \
-               git diff "$@"; \
-       elif [ -d "$MR_REPO"/.bzr ]; then \
-               bzr diff "$@"; \
-       elif [ -d "$MR_REPO"/CVS ]; then \
-               cvs diff "$@"; \
-       else \
-               error "unknown repo type"; \
+git_svn_clean = 
+       if [ "x$1" = x-f ] ; then
+               shift
+               git clean -dx --force "$@"
+       else
+               git clean -dx --dry-run "$@"

        fi
        fi

-log = \
-       if [ -d "$MR_REPO"/.svn ]; then \
-               svn log"$@"; \
-       elif [ -d "$MR_REPO"/.git ]; then \
-               git log "$@"; \
-       elif [ -d "$MR_REPO"/.bzr ]; then \
-               bzr log "$@"; \
-       elif [ -d "$MR_REPO"/CVS ]; then \
-               cvs log "$@"; \
-       else \
-               error "unknown repo type"; \
+bzr_clean = 
+       if [ "x$1" = x-f ] ; then
+               shift
+               bzr clean-tree --verbose --force --ignored --unknown --detritus "$@"
+       else
+               bzr clean-tree --verbose --dry-run --ignored --unknown --detritus "$@"

        fi
        fi

-list = true
+cvs_clean = 
+        if [ "x$1" = x-f ] ; then
+               shift
+               cvs-clean "$@"
+       else
+               cvs-clean --dry-run "$@"
+       fi
+hg_clean = 
+       if [ "x$1" = x-f ] ; then
+               shift
+               hg purge --print --all "$@"
+               hg purge --all "$@"
+       else
+               hg purge --print --all "$@"
+       fi
+fossil_clean = 
+       if [ "x$1" = x-f ] ; then
+               shift
+               fossil clean --dry-run --dotfiles --emptydirs "$@"
+       else
+               fossil clean --force --dotfiles --emptydirs "$@"
+       fi
+vcsh_clean = 
+       if [ "x$1" = x-f ] ; then
+               shift
+               vcsh run "$MR_REPO" git clean -dx "$@"
+       else
+               vcsh run "$MR_REPO" git clean -dx --dry-run "$@"
+       fi
+
+svn_status = svn status "$@"
+git_status = git status -s "$@" || true; git --no-pager log --branches --not --remotes --simplify-by-decoration --decorate --oneline || true
+bzr_status = bzr status --short "$@"; bzr missing
+cvs_status = cvs -q status | grep -E '^(File:.*Status:|\?)' | grep -v 'Status: Up-to-date'
+hg_status  = hg status "$@"; hg summary --quiet | grep -v 'parent: 0:'
+darcs_status = darcs whatsnew -ls "$@" || true
+fossil_status = fossil changes "$@"
+vcsh_status = vcsh run "$MR_REPO" git -c status.relativePaths=false status -s "$@" || true
+veracity_status = vv status "$@"
+
+svn_commit = svn commit "$@"
+git_commit = git commit -a "$@" && git push --all
+bzr_commit = 
+       if is_bzr_checkout; then
+               bzr commit "$@"
+       else
+               bzr commit "$@" && bzr push
+       fi
+cvs_commit = cvs commit "$@"
+hg_commit  = hg commit "$@" && hg push
+darcs_commit = darcs record -a "$@" && darcs push -a
+fossil_commit = fossil commit "$@"
+vcsh_commit = vcsh run "$MR_REPO" git commit -a "$@" && vcsh run "$MR_REPO" git push --all
+veracity_commit = vv commit "$@" && vv push
+
+git_record = git commit -a "$@"
+bzr_record =
+       if is_bzr_checkout; then
+               bzr commit --local "$@"
+       else
+               bzr commit "$@"
+       fi
+hg_record  = hg commit "$@"
+darcs_record = darcs record -a "$@"
+fossil_record = fossil commit "$@"
+vcsh_record = vcsh run "$MR_REPO" git commit -a "$@"
+veracity_record = vv commit "$@"
+
+svn_push = :
+git_push = git push "$@"
+bzr_push = bzr push "$@"
+cvs_push = :
+hg_push = hg push "$@"
+darcs_push = darcs push -a "$@"
+fossil_push = fossil push "$@"
+vcsh_push = vcsh run "$MR_REPO" git push "$@"
+veracity_push = vv push "$@"
+
+svn_diff = svn diff "$@"
+git_diff = git diff "$@"
+bzr_diff = bzr diff "$@"
+cvs_diff = cvs -q diff "$@"
+hg_diff  = hg diff "$@"
+darcs_diff = darcs diff -u "$@"
+fossil_diff = fossil diff "$@"
+vcsh_diff = vcsh run "$MR_REPO" git diff "$@"
+veracity_diff = vv diff "$@"
+
+svn_log = svn log "$@"
+git_log = git log "$@"
+bzr_log = bzr log "$@"
+cvs_log = cvs log "$@"
+hg_log  = hg log "$@"
+darcs_log = darcs changes "$@"
+git_bare_log = git log "$@"
+fossil_log = fossil timeline "$@"
+vcsh_log = vcsh run "$MR_REPO" git log "$@"
+veracity_log = vv log "$@"
+
+hg_grep = hg grep "$@"
+cvs_grep = ack-grep "$@"
+svn_grep = ack-grep "$@"
+git_svn_grep = git grep "$@"
+git_grep = git grep "$@"
+bzr_grep = ack-grep "$@"
+darcs_grep = ack-grep "$@"
+
+run = "$@"
+
+svn_register =
+       url=`LC_ALL=C svn info . | grep -i '^URL:' | cut -d ' ' -f 2`
+       if [ -z "$url" ]; then
+               error "cannot determine svn url"
+       fi
+       echo "Registering svn url: $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="svn co '$url' '$MR_REPO'"
+git_register = 
+       url="`LC_ALL=C git config --get remote.origin.url`" || true
+       if [ -z "$url" ]; then
+               error "cannot determine git url"
+       fi
+       echo "Registering git url: $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="git clone '$url' '$MR_REPO'"
+bzr_register =
+       url="`LC_ALL=C bzr info . | egrep -i 'checkout of branch|parent branch' | awk '{print $NF}' | head -n 1`"
+       if [ -z "$url" ]; then
+               error "cannot determine bzr url"
+       fi
+       echo "Registering bzr url: $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="bzr branch '$url' '$MR_REPO'"
+cvs_register =
+       repo=`cat CVS/Repository`
+       root=`cat CVS/Root`
+       if [ -z "$root" ]; then
+               error "cannot determine cvs root"
+               fi
+       echo "Registering cvs repository $repo at root $root"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="cvs -d '$root' co -d '$MR_REPO' '$repo'"
+hg_register = 
+       url=`hg showconfig paths.default`
+       echo "Registering mercurial repo url: $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="hg clone '$url' '$MR_REPO'"
+darcs_register = 
+       url=`cat _darcs/prefs/defaultrepo`
+       echo "Registering darcs repository $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="darcs get '$url' '$MR_REPO'"
+git_bare_register = 
+       url="`LC_ALL=C GIT_CONFIG=config git config --get remote.origin.url`" || true
+       if [ -z "$url" ]; then
+               error "cannot determine git url"
+       fi
+       echo "Registering git url: $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="git clone --bare '$url' '$MR_REPO'"
+vcsh_register =
+       url="`LC_ALL=C vcsh run "$MR_REPO" git config --get remote.origin.url`" || true
+       if [ -z "$url" ]; then
+               error "cannot determine git url"
+       fi
+       echo "Registering git url: $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="vcsh clone '$url' '$MR_REPO'"
+fossil_register =
+       url=`fossil remote-url`
+       repo=`fossil info | grep repository | sed -e 's/repository:*.//g' -e 's/ //g'`
+       echo "Registering fossil repository $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="mkdir -p '$MR_REPO' && cd '$MR_REPO' && fossil open '$repo'"
+veracity_register =
+       url=`vv config | grep sync_targets | sed -e 's/sync_targets:*.//g' -e 's/ //g'`
+       repo=`vv repo info | grep repository | sed -e 's/Current repository:*.//g' -e 's/ //g'`
+       echo "Registering veracity repository $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="mkdir -p '$MR_REPO' && cd '$MR_REPO' && vv checkout '$repo'"
+
+svn_trusted_checkout = svn co $url $repo
+svn_alt_trusted_checkout = svn checkout $url $repo
+git_trusted_checkout = git clone $url $repo
+bzr_trusted_checkout = bzr checkout|clone|branch|get $url $repo
+# cvs: too hard
+hg_trusted_checkout = hg clone $url $repo
+darcs_trusted_checkout = darcs get $url $repo
+git_bare_trusted_checkout = git clone --bare $url $repo
+vcsh_old_trusted_checkout = vcsh run "$MR_REPO" git clone $url $repo
+vcsh_trusted_checkout = vcsh clone $url $repo
+# fossil: messy to do
+veracity_trusted_checkout = vv clone $url $repo

 
 

-help = \
-       if [ ! -e "$MR_PATH" ]; then \
-               error "cannot find program path";\
-       fi; \
-       (pod2man -c mr "$MR_PATH" | man -l -) || \
-               error "pod2man or man failed"
+
+list = true
+config = 
+bootstrap = 
+
+online =
+       if [ -s ~/.mrlog ]; then
+               info "running offline commands"
+               mv -f ~/.mrlog ~/.mrlog.old
+               if ! sh -e ~/.mrlog.old; then
+                       error "offline command failed; left in ~/.mrlog.old"
+               fi
+               rm -f ~/.mrlog.old
+       else
+               info "no offline commands to run"
+       fi
+offline =
+       umask 077
+       touch ~/.mrlog
+       info "offline mode enabled"
+remember =
+       info "remembering command: 'mr $@'"
+       command="mr -d '$(pwd)' $MR_SWITCHES"
+       for w in "$@"; do
+               command="$command '$w'"
+       done
+       if [ ! -e ~/.mrlog ] || ! grep -q -F "$command" ~/.mrlog; then
+               echo "$command" >> ~/.mrlog
+       fi

 
 ed = echo "A horse is a horse, of course, of course.."
 T = echo "I pity the fool."
 
 ed = echo "A horse is a horse, of course, of course.."
 T = echo "I pity the fool."

+right = echo "Not found."
+
+# vim:sw=8:sts=0:ts=8:noet
+# Local variables:
+# indent-tabs-mode: t
+# cperl-indent-level: 8
+# End: