X-Git-Url: https://git.madduck.net/code/myrepos.git/blobdiff_plain/abf6cf51bad2cff8877412f018e7c9a54b9a266e..ebc88f26c7cbe202c2738bfc30423280c80f172b:/mr

diff --git a/mr b/mr
index 01a9feb..17f9585 100755
--- a/mr
+++ b/mr
@@ -14,28 +14,48 @@ B<mr> [options] status
 
 B<mr> [options] commit [-m "message"]
 
+B<mr> [options] record [-m "message"]
+
+B<mr> [options] push
+
 B<mr> [options] diff
 
 B<mr> [options] log
 
+B<mr> [options] run command [param ...]
+
+B<mr> [options] bootstrap url [directory]
+
+B<mr> [options] register [repository]
+
+B<mr> [options] config section ["parameter=[value]" ...]
+
 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 ...]
 
-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".
+=head1 DESCRIPTION
+
+B<mr> is a Multiple Repository management tool. It can checkout, update, or
+perform other actions on a set of repositories as if they were one combined
+repository. It supports any combination of subversion, git, cvs, mercurial,
+bzr, darcs and fossil repositories, and support for other revision
+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,
 
-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 revision
 control system:
 
 =over 4
@@ -58,10 +78,24 @@ uncommitted changes are present in the repository.
 =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.
+
+=item record
+
+Records changes to the local repository, but does not push them to the
+remote repository. Only supported for distributed revision control systems.
 
 The optional -m parameter allows specifying a commit message.
 
+=item push
+
+Pushes committed local changes to the remote repository. A no-op for
+centralized revision control systems.
+
 =item diff
 
 Show a diff of uncommitted changes.
@@ -70,24 +104,94 @@ Show a diff of uncommitted changes.
 
 Show the commit log.
 
+=item run command [param ...]
+
+Runs the specified command in each repository.
+
+=back
+
+These commands are also available:
+
+=over 4
+
+=item bootstrap url [directory]
+
+Causes mr to download the url, and use it as a .mrconfig file
+to checkout the repositories listed in it, into the specified directory.
+
+The directory will be created if it does not exist. If no directory is
+specified, the current directory will be used.
+
+If the .mrconfig file includes a repository named ".", that
+is checked out into the top of the specified directory.
+
 =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 "parameter=value". Use "parameter=" to
+remove a parameter. Use just "parameter" to get the value of a parameter.
+
+For example, to add (or edit) a repository in src/foo:
+
+  mr config src/foo checkout="svn co svn://example.com/foo/trunk foo"
+
+To show the command that mr uses to update the repository in src/foo:
+
+  mr config src/foo update
+
+To see the built-in library of shell functions contained in mr:
+
+  mr config DEFAULT lib
+
+The mrconfig file 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
 
-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"
 
-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 revision control system. This is mostly useful
+if the repositories mr will act on all use the same revision control
+system.
 
 =head1 OPTIONS
 
@@ -95,86 +199,254 @@ revision control system.
 
 =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
 
-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 B<~/.mrconfig>
+as well as look for a .mrconfig file in the current directory, or in one
+of its parent directories.
 
 =item -v
 
+=item --verbose
+
 Be verbose.
 
+=item -q
+
+=item --quiet
+
+Be quiet. This supresses 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.
+
+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.
+
+=item -t
+
+=item --trust-all
+
+Trust all mrconfig files even if they are not listed in ~/.mrtrust.
+Use with caution.
+
+=item -p
+
+=item --path
+
+This obsolete flag is ignored.
+
 =back
 
-=head1 FILES
+=head1 MRCONFIG FILES
 
-B<mr> is configured by .mrconfig files. It starts by reading the .mrconfig
-file in your home directory. Each repository specified in a .mrconfig file
-can also have its own .mrconfig file in its root directory that can
-optionally be used as well. So you could have a ~/.mrconfig that registers a
-repository ~/src, that itself contains a ~/src/.mrconfig file, that in turn
-registers several additional repositories.
+Here is an example .mrconfig file:
+
+  [src]
+  checkout = svn co svn://svn.example.com/src/trunk src
+  chain = true
+
+  [src/linux-2.6]
+  checkout = git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git &&
+  	cd linux-2.6 &&
+  	git checkout -b mybranch origin/master
 
 The .mrconfig file uses a variant of the INI file format. Lines starting with
-"#" are comments. Lines ending with "\" are continued on to the next line.
+"#" 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 "DEFAULT" section allows setting default values for the sections that
 come after it.
 
-The "alias" section allows adding aliases for actions. Each parameter
+The "ALIAS" section allows adding aliases for actions. Each parameter
 is an alias, and its value is the action to use.
 
-All other sections specify where each repository is located, relative to the
-directory that contains the .mrconfig file.
+All other sections add repositories. The section header specifies the
+directory where the repository is located. This is relative to the directory
+that contains the mrconfig file, but you can also choose to use absolute
+paths. (Note that you can use environment variables in section names; they
+will be passed through the shell for expansion. For example, 
+"[$HOSTNAME]", or "[${HOSTNAME}foo]")
 
 Within a section, each parameter defines a shell command to run to handle a
-given action. mr contains default handlers for the "update", "status", and
-"commit" actions, so normally you only need to specify what to do for
-"checkout".
+given action. mr contains default handlers for "update", "status",
+"commit", and other standard actions. Normally you only need to specify what
+to do for "checkout".
 
 Note that these shell commands are run in a "set -e" shell
 environment, where any additional parameters you pass are available in
 "$@". The "checkout" command is run in the parent of the repository
 directory, since the repository isn't checked out yet. All other commands
 are run inside the repository, though not necessarily at the top of it.
+
 The "MR_REPO" environment variable is set to the path to the top of the
-repository.
-
-There are three special parameters. If the "skip" parameter is set and
-its command returns nonzero, then B<mr> will skip acting on that repository.
-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.) The
-"lib" parameter can specify some shell code that will be run before each
+repository. (For the "register" action, "MR_REPO" is instead set to the 
+basename of the directory that should be created when checking the
+repository out.)
+
+The "MR_CONFIG" environment variable is set to the .mrconfig file
+that defines the repo being acted on, or, if the repo is not yet in a config
+file, the .mrconfig file that should be modified to register the repo.
+
+A few parameters have special meanings:
+
+=over 4
+
+=item skip
+
+If the "skip" parameter is set and its command returns true, then B<mr>
+will skip acting on that repository. The command is passed the action
+name in $1.
+
+Here are two examples. The first skips the repo unless
+mr is run by joey. The second uses the hours_since function
+(included in mr's built-in library) to skip updating the repo unless it's
+been at least 12 hours since the last update.
+
+  skip = test `whoami` != joey
+  skip = [ "$1" = update ] && ! hours_since "$1" 12
+
+=item order
+
+The "order" parameter can be used to override the default ordering of
+repositories. The default order value is 10. Use smaller values to make
+repositories be processed earlier, and larger values to make repositories
+be processed later.
+
+Note that if a repository is located in a subdirectory of another
+repository, ordering it to be processed earlier is not recommended.
+
+=item chain
+
+If the "chain" parameter is set and its command returns true, then B<mr>
+will try to load a .mrconfig file from the root of the repository.
+
+=item include
+
+If the "include" parameter is set, its command is ran, and should output
+additional mrconfig file content. The content is included as if it were
+part of the including file.
+
+Unlike all other parameters, this parameter does not need to be placed
+within a section.
+
+=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.
 
-For example:
+=item fixups
 
-  [src]
-  checkout = svn co svn://svn.example.com/src/trunk src
-  chain = true
+If the "fixups" parameter 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.
 
-  [src/linux-2.6]
-  skip = small
-  checkout = git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
-
-  [default]
-  lib = \
-  small() {
-  	case "$(hostname)" in; \
-  	slug|snail); \
-  		return 0; ;; ; \
-  	esac; \
-  	return 1; \
-  }
+=item pre_ and post_
+
+If a "pre_action" parameter is set, its command is run before mr performs the
+specified action. Similarly, "post_action" parameters are run after mr
+successfully performs the specified action. For example, "pre_commit" is
+run before committing; "post_update" is run after updating.
+
+=back
+
+When looking for a command to run for a given action, mr first looks for
+a parameter with the same name as the action. If that is not found, it
+looks for a parameter named "rcs_action" (substituting in the name of the
+revision control system and the action). The name of the revision control
+system is itself determined by running each defined "rcs_test" action,
+until one succeeds.
+
+Internally, mr has settings for "git_update", "svn_update", etc. To change
+the action that is performed for a given revision control system, you can
+override these rcs specific actions. To add a new revision control system,
+you can just add rcs specific actions for it.
+
+=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 ~/.mrconfig checks out. To
+avoid worries about evil commands in a mrconfig file, mr defaults to
+reading all mrconfig files other than the main ~/.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 ~/.mrtrust.
+One mrconfig file should be listed per line. Either the full pathname
+should be listed, or the pathname can start with "~/" to specify a file
+relative to your home directory.
+
+=head1 OFFLINE LOG FILE
+
+The ~/.mrlog file contains commands that mr has remembered to run later,
+due to being offline. You can delete or edit this file to remove commands,
+or even to add other commands for 'mr online' to run. If the file is
+present, mr assumes it is in offline mode.
+
+=head1 EXTENSIONS
+
+mr can be extended to support things such as unison and git-svn. Some
+files providing such extensions are available in /usr/share/mr/. See
+the documentation in the files for details about using them.
+
+=head1 EXIT STATUS
+
+mr returns nonzero if a command failed in any of the repositories.
 
 =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.
 
@@ -187,162 +459,401 @@ use strict;
 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 $quiet=0;
+my $stats=0;
+my $insecure=0;
+my $interactive=0;
+my $max_depth;
+my $no_chdir=0;
+my $jobs=1;
+my $trust_all=0;
+my $directory=getcwd();
+
+$ENV{MR_CONFIG}=find_mrconfig();
+
+# globals :-(
 my %config;
+my %configfiles;
 my %knownactions;
 my %alias;
+my (@ok, @failed, @skipped);
 
-Getopt::Long::Configure("no_permute");
-my $result=GetOptions(
-	"d=s" => sub { $directory=abs_path($_[1]) },
-	"c=s" => \$config,
-	"v" => \$verbose,
-);
-if (! $result || @ARGV < 1) {
-	die("Usage: mr [-d directory] action [params ...]\n".
-	    "(Use mr help for man page.)\n");
-
-}
+main();
 
-loadconfig(\*DATA);
-loadconfig($config);
-#use Data::Dumper;
-#print Dumper(\%config);
+my %rcs;
+sub rcs_test {
+	my ($action, $dir, $topdir, $subdir) = @_;
 
-eval {
-	use FindBin qw($Bin $Script);
-	$ENV{MR_PATH}=$Bin."/".$Script;
-};
+	if (exists $rcs{$dir}) {
+		return $rcs{$dir};
+	}
 
-# alias expansion and command stemming
-my $action=shift @ARGV;
-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];
+	my $test="set -e\n";
+	foreach my $rcs_test (
+			sort {
+				length $a <=> length $b 
+				          ||
+				       $a cmp $b
+			} grep { /_test$/ } keys %{$config{$topdir}{$subdir}}) {
+		my ($rcs)=$rcs_test=~/(.*)_test/;
+		$test="my_$rcs_test() {\n$config{$topdir}{$subdir}{$rcs_test}\n}\n".$test;
+		$test.="if my_$rcs_test; then echo $rcs; fi\n";
+	}
+	$test=$config{$topdir}{$subdir}{lib}."\n".$test
+		if exists $config{$topdir}{$subdir}{lib};
+	
+	print "mr $action: running rcs test >>$test<<\n" if $verbose;
+	my $rcs=`$test`;
+	chomp $rcs;
+	if ($rcs=~/\n/s) {
+		$rcs=~s/\n/, /g;
+		print STDERR "mr $action: found multiple possible repository types ($rcs) for ".fulldir($topdir, $subdir)."\n";
+		return undef;
 	}
-	elsif (@matches == 0) {
-		die "mr: unknown action \"$action\" (known actions: ".
-			join(", ", sort keys %knownactions).")\n";
+	if (! length $rcs) {
+		return $rcs{$dir}=undef;
 	}
 	else {
-		die "mr: ambiguous action \"$action\" (matches: ".
-			join(", ", @matches).")\n";
+		return $rcs{$dir}=$rcs;
 	}
 }
+	
+sub findcommand {
+	my ($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 $dir=$topdir.$subdir;
-		next if $dir ne $directory && $dir !~ /^\Q$directory\E\//;
-		push @repos, [$dir, $topdir, $subdir];
+	my $rcs=rcs_test(@_);
+
+	if (defined $rcs && 
+	    exists $config{$topdir}{$subdir}{$rcs."_".$action}) {
+		return $config{$topdir}{$subdir}{$rcs."_".$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 $dir=$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 action {
-	my ($action, $dir, $topdir, $subdir) = @_;
-	
-	my $lib= exists $config{$topdir}{$subdir}{lib} ?
-	                $config{$topdir}{$subdir}{lib} : "";
+	my ($action, $dir, $topdir, $subdir, $force_checkout) = @_;
+	my $fulldir=fulldir($topdir, $subdir);
 
-	if ($action eq 'checkout') {
-		if (-d $dir) {
-			print "mr $action: $dir already exists, skipping checkout\n" if $verbose;
-			push @skipped, $dir;
-			return;
+	$ENV{MR_CONFIG}=$configfiles{$topdir};
+	my $lib=exists $config{$topdir}{$subdir}{lib} ?
+	               $config{$topdir}{$subdir}{lib}."\n" : "";
+	my $is_checkout=($action eq 'checkout');
+	my $is_update=($action =~ /update/);
+
+	$ENV{MR_REPO}=$dir;
+
+	if ($is_checkout) {
+		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);
 		}
 	}
-	
-	$ENV{MR_REPO}=$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 $skiptest=findcommand("skip", $dir, $topdir, $subdir, $is_checkout);
+	my $command=findcommand($action, $dir, $topdir, $subdir, $is_checkout);
+
+	if (defined $skiptest) {
+		my $test="set -e;".$lib.
+			"my_action(){ $skiptest\n }; my_action '$action'";
+		print "mr $action: running skip test >>$test<<\n" if $verbose;
 		my $ret=system($test);
+		if ($ret != 0) {
+			if (($? & 127) == 2) {
+				print STDERR "mr $action: interrupted\n";
+				return ABORT;
+			}
+			elsif ($? & 127) {
+				print STDERR "mr $action: skip test received signal ".($? & 127)."\n";
+				return ABORT;
+			}
+		}
 		if ($ret >> 8 == 0) {
 			print "mr $action: $dir skipped per config file\n" if $verbose;
-			push @skipped, $dir;
-			return;
+			return SKIPPED;
 		}
 	}
-	
-	if (! $nochdir && ! chdir($dir)) {
+
+	if ($is_checkout && ! -d $dir) {
+		print "mr $action: creating parent directory $dir\n" if $verbose;
+		system("mkdir", "-p", $dir);
+	}
+
+	if (! $no_chdir && ! chdir($dir)) {
 		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 $rcs=rcs_test(@_);
+		if (! defined $rcs) {
+			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 $rcs repository $fulldir, skipping\n";
+			return SKIPPED;
+		}
 	}
 	else {
-		if (! $nochdir) {
-			print "mr $action: $dir\n";
+		my $actionmsg;
+		if (! $no_chdir) {
+			$actionmsg="mr $action: $fulldir";
 		}
 		else {
-			print "mr $action: $dir (in subdir $directory)\n";
+			my $s=$directory;
+			$s=~s/^\Q$fulldir\E\/?//;
+			$actionmsg="mr $action: $fulldir (in subdir $s)";
+		}
+		print "$actionmsg\n" unless $quiet;
+
+		my $hookret=hook("pre_$action", $topdir, $subdir);
+		return $hookret if $hookret != OK;
+
+		$command="set -e; ".$lib.
+			"my_action(){ $command\n }; my_action ".
+			join(" ", map { s/\\/\\\\/g; s/"/\"/g; '"'.$_.'"' } @ARGV);
+		print "mr $action: running >>$command<<\n" if $verbose;
+		my $ret;
+		if ($quiet) {
+			my $output = qx/$command 2>&1/;
+			$ret = $?;
+			if ($ret != 0) {
+				print "$actionmsg\n";
+				print STDERR $output;
+			}
+		}
+		else {
+			$ret=system($command);
 		}
-		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);
 		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;
-			push @failed, $topdir.$subdir;
 			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";
 			}
+			return FAILED;
 		}
 		else {
-			push @successful, $dir;
+			if ($is_checkout && ! -d $dir) {
+				print STDERR "mr $action: $dir missing after checkout\n";;
+				return FAILED;
+			}
+
+			my $ret=hook("post_$action", $topdir, $subdir);
+			return $ret if $ret != OK;
+			
+			if (($is_checkout || $is_update)) {
+				my $ret=hook("fixups", $topdir, $subdir);
+				return $ret if $ret != OK;
+			}
+			
+			return OK;
 		}
+	}
+}
 
-		print "\n";
+sub hook {
+	my ($hook, $topdir, $subdir) = @_;
+
+	my $command=$config{$topdir}{$subdir}{$hook};
+	return OK unless defined $command;
+	my $lib=exists $config{$topdir}{$subdir}{lib} ?
+	               $config{$topdir}{$subdir}{lib}."\n" : "";
+	my $shell="set -e;".$lib.
+		"my_hook(){ $command\n }; my_hook";
+	print "mr $hook: running >>$shell<<\n" if $verbose;
+	my $ret;
+	if ($quiet) {
+		my $output = qx/$shell 2>&1/;
+		$ret = $?;
+		if ($ret != 0) {
+			print STDERR $output;
+		}
+	}
+	else {
+		$ret=system($shell);
+	}
+	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;
+		}
+	}
+
+	return OK;
+}
+
+# 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, @$repo);
+			}
+			close CHILD_STDOUT;
+			close CHILD_STDERR;
+			push @active, [$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);
+						    	splice(@fhs, $i, 1);
+						    	splice(@active, $i, 1);
+						    	splice(@out, $i, 1);
+							$running--;
+						}
+					}
+					$out[$i][$channel] .= $r;
+				}
+			}
+		}
+	}
+}
+
+sub record {
+	my $dir=shift()->[0];
+	my $ret=shift;
+
+	if ($ret == OK) {
+		push @ok, $dir;
+		print "\n" unless $quiet;
+	}
+	elsif ($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" unless $quiet;
+	}
+	elsif ($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 $quiet;
+	if ($stats) {
+		if (@skipped) {
+			print "mr $action: (skipped: ".join(" ", @skipped).")\n" unless $quiet;
+		}
+		if (@failed) {
+			print STDERR "mr $action: (failed: ".join(" ", @failed).")\n";
+		}
 	}
 }
 
@@ -355,188 +866,972 @@ sub showstat {
 	}
 	return;
 }
-if (! @successful && ! @failed && ! @skipped) {
-	die "mr $action: no repositories found to work on\n";
+
+# 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;
 }
-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;
+
+# figure out which repos to act on
+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 $config eq abs_path("$ENV{HOME}/.mrconfig");
+
+	return 1 if $trust_all;
+
+	my $trustfile=$ENV{HOME}."/.mrtrust";
+
+	if (! %trusted) {
+		$trusted{"$ENV{HOME}/.mrconfig"}=1;
+		if (open (TRUST, "<", $trustfile)) {
+			while (<TRUST>) {
+				chomp;
+				s/^~\//$ENV{HOME}\//;
+				$trusted{abs_path($_)}=1;
+			}
+			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] && $twords[$c] eq $words[$c]) {
+				$match=1;
+			}
+			else {
+				$match=0;
+			}
+		}
+		return 1 if $match;
+	}
+
+	return 0;
 }
-elsif (! @successful && @skipped) {
-	exit 1;
+
+sub trusterror {
+	die shift()."\n".
+		"(To trust this file, list it in ~/.mrtrust.)\n";
 }
-exit 0;
 
 my %loaded;
 sub loadconfig {
 	my $f=shift;
+	my $dir=shift;
 
 	my @toload;
 
 	my $in;
-	my $dir;
+	my $trusted;
 	if (ref $f eq 'GLOB') {
-		$in=$f;	
 		$dir="";
+		$in=$f;
+		$trusted=1;
 	}
 	else {
-		# $f might be a symlink
+		if (! -e $f) {
+			return;
+		}
+
 		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) {
-			$dir=".";
+			($dir)=$f=~/^(.*\/)[^\/]+$/;
+			if (! defined $dir) {
+				$dir=".";
+			}
 		}
+
 		$dir=abs_path($dir)."/";
+		
+		if (! exists $configfiles{$dir}) {
+			$configfiles{$dir}=$f;
+		}
 
 		# 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}} };
+			    exists $config{$parent}{DEFAULT}) {
+				$config{$dir}{DEFAULT}={ %{$config{$parent}{DEFAULT}} };
 				last;
 			}
 		}
+		
+		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 $section;
-	while (<$in>) {
+	my $line=0;
+	while (@lines) {
+		$_=shift @lines;
+		$line++;
 		chomp;
 		next if /^\s*\#/ || /^\s*$/;
-		if (/^\s*\[([^\]]*)\]\s*$/) {
+		if (/^\[([^\]]*)\]\s*$/) {
 			$section=$1;
+
+			if (! $trusted) {
+				if (! is_trusted_repo($section) ||
+				    $section eq 'ALIAS' ||
+				    $section eq 'DEFAULT') {
+					trusterror "mr: illegal section \"[$section]\" in untrusted $f line $line";
+				}
+			}
+			$section=expandenv($section) if $trusted;
+			if ($section ne 'ALIAS' &&
+			    ! exists $config{$dir}{$section} &&
+			    exists $config{$dir}{DEFAULT}) {
+				# copy in defaults
+				$config{$dir}{$section}={ %{$config{$dir}{DEFAULT}} };
+			}
 		}
-		elsif (/^\s*(\w+)\s*=\s*(.*)/) {
+		elsif (/^(\w+)\s*=\s*(.*)/) {
 			my $parameter=$1;
 			my $value=$2;
 
-			# continuation line
-			while ($value=~/(.*)\\$/) {
-				$value=$1.<$in>;
+			# continued value
+			while (@lines && $lines[0]=~/^\s(.+)/) {
+				shift(@lines);
+				$line++;
+				$value.="\n$1";
 				chomp $value;
 			}
 
+			if (! $trusted) {
+				# Untrusted files can only contain checkout
+				# parameters.
+				if ($parameter ne 'checkout') {
+					trusterror "mr: illegal setting \"$parameter=$value\" in untrusted $f line $line";
+				}
+				if (! is_trusted_checkout($value)) {
+					trusterror "mr: illegal checkout command \"$value\" in untrusted $f line $line";
+				}
+			}
+
+			if ($parameter eq "include") {
+				print "mr: including output of \"$value\"\n" if $verbose;
+				unshift @lines, `$value`;
+				if ($?) {
+					print STDERR "mr: include command exited nonzero ($?)\n";
+				}
+				next;
+			}
+
 			if (! defined $section) {
 				die "$f line $.: parameter ($parameter) not in section\n";
 			}
-			if ($section ne 'alias' &&
-			    ! exists $config{$dir}{$section} &&
-			    exists $config{$dir}{default}) {
-				# copy in defaults
-				$config{$dir}{$section}={ %{$config{$dir}{default}} };
-			}
-			if ($section eq 'alias') {
+			if ($section eq 'ALIAS') {
 				$alias{$parameter}=$value;
 			}
 			elsif ($parameter eq 'lib') {
-				$config{$dir}{$section}{lib}.=$value." ; ";
+				$config{$dir}{$section}{lib}.=$value."\n";
 			}
 			else {
 				$config{$dir}{$section}{$parameter}=$value;
-				$knownactions{$parameter}=1;
+				if ($parameter =~ /.*_(.*)/) {
+					$knownactions{$1}=1;
+				}
+				else {
+					$knownactions{$parameter}=1;
+				}
 				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" &&
+				    -e $dir.$section."/.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, $dir.$section."/.mrconfig";
+					}
 			        }
 			}
 		}
 		else {
-			die "$f line $.: parse error\n";
+			die "$f line $line: parse error\n";
 		}
 	}
-	close $in;
 
 	foreach (@toload) {
 		loadconfig($_);
 	}
 }
 
+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 'help') {
+		help(@ARGV);
+	}
+	elsif ($action eq 'config') {
+		config(@ARGV);
+	}
+	elsif ($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 {
+	exec($config{''}{DEFAULT}{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";
+		}
+	}
+
+	$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 {
+	my $url=shift @ARGV;
+	my $dir=shift @ARGV || ".";
+	
+	if (! defined $url || ! length $url) {
+		die "mr: bootstrap requires url\n";
+	}
+	
+	# Download the config file to a temporary location.
+	eval q{use File::Temp};
+	die $@ if $@;
+	my $tmpconfig=File::Temp->new();
+	my @curlargs = ("curl", "-A", "mr", "-L", "-s", $url, "-o", $tmpconfig);
+	push(@curlargs, "-k") if $insecure;
+	my $curlstatus = system(@curlargs);
+	die "mr bootstrap: invalid SSL certificate for $url (consider -k)\n" if $curlstatus >> 8 == 60;
+	die "mr bootstrap: download of $url failed\n" if $curlstatus != 0;
+
+	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);
+	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 $url\n";
+	}
+	else {
+		eval q{use File::Copy};
+		die $@ if $@;
+		move($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 "$ENV{HOME}/.mrconfig";
+}
+
+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
+		"v|verbose" => \$verbose,
+		"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."/".$Script;
+	};
+}
+	
+sub exitstats {
+	if (@failed) {
+		exit 1;
+	}
+	else {
+		exit 0;
+	}
+}
+
+sub main {
+	getopts();
+	init();
+
+	startingconfig();
+	loadconfig("$ENV{HOME}/.mrconfig");
+	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]
-	co = checkout
-	ci = commit
-	ls = list
-
-[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"/CVS ]; then \
-		cvs update "$@"; \
-	else \
-		error "unknown repo type"; \
+[ALIAS]
+co = checkout
+ci = commit
+ls = list
+
+[DEFAULT]
+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
+	}
+
+svn_test = test -d "$MR_REPO"/.svn
+git_test = test -d "$MR_REPO"/.git
+bzr_test = test -d "$MR_REPO"/.bzr
+cvs_test = test -d "$MR_REPO"/CVS
+hg_test  = test -d "$MR_REPO"/.hg
+darcs_test = test -d "$MR_REPO"/_darcs
+fossil_test = test -f "$MR_REPO"/_FOSSIL_
+git_bare_test =
+	test -d "$MR_REPO"/refs/heads && test -d "$MR_REPO"/refs/tags &&
+	test -d "$MR_REPO"/objects && test -f "$MR_REPO"/config &&
+	test "`GIT_CONFIG="$MR_REPO"/config git config --get core.bare`" = true
+
+svn_update = svn update "$@"
+git_update = git pull "$@"
+bzr_update = bzr merge --pull "$@"
+cvs_update = cvs update "$@"
+hg_update  = hg pull "$@" && hg update "$@"
+darcs_update = darcs pull -a "$@"
+fossil_update = fossil pull "$@"
+
+svn_status = svn status "$@"
+git_status = git status -s "$@" || true
+bzr_status = bzr status --short "$@"
+cvs_status = cvs status "$@"
+hg_status  = hg status "$@"
+darcs_status = darcs whatsnew -ls "$@" || true
+fossil_status = fossil changes "$@"
+
+svn_commit = svn commit "$@"
+git_commit = git commit -a "$@" && git push --all
+bzr_commit = bzr commit "$@" && bzr push
+cvs_commit = cvs commit "$@"
+hg_commit  = hg commit -m "$@" && hg push
+darcs_commit = darcs record -a -m "$@" && darcs push -a
+fossil_commit = fossil commit "$@"
+
+git_record = git commit -a "$@"
+bzr_record = bzr commit "$@"
+hg_record  = hg commit -m "$@"
+darcs_record = darcs record -a -m "$@"
+fossil_record = fossil commit "$@"
+
+svn_push = :
+git_push = git push "$@"
+bzr_push = bzr push "$@"
+cvs_push = :
+hg_push = hg push "$@"
+darcs_push = darcs push -a "$@"
+fossil_push = fossil push "$@"
+
+svn_diff = svn diff "$@"
+git_diff = git diff "$@"
+bzr_diff = bzr diff "$@"
+cvs_diff = cvs diff "$@"
+hg_diff  = hg diff "$@"
+darcs_diff = darcs diff -u "$@"
+fossil_diff = fossil 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 "$@"
+
+run = "$@"
+
+svn_register =
+	url=`LC_ALL=C svn info . | grep -i '^URL:' | cut -d ' ' -f 2`
+	if [ -z "$url" ]; then
+		error "cannot determine svn url"
 	fi
-status = \
-	if [ -d "$MR_REPO"/.svn ]; then \
-		svn status "$@"; \
-	elif [ -d "$MR_REPO"/.git ]; then \
-		git status "$@" || true; \
-	elif [ -d "$MR_REPO"/CVS ]; then \
-		cvs status "$@"; \
-	else \
-		error "unknown repo type"; \
+	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 "$url" ]; then
+		error "cannot determine git url"
 	fi
-commit = \
-	if [ -d "$MR_REPO"/.svn ]; then \
-		svn commit "$@"; \
-	elif [ -d "$MR_REPO"/.git ]; then \
-		git commit -a "$@" && git push --all; \
-	elif [ -d "$MR_REPO"/CVS ]; then \
-		cvs commit "$@"; \
-	else \
-		error "unknown repo type"; \
+	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 $NF}'`"
+	if [ -z "$url" ]; then
+		error "cannot determine bzr url"
 	fi
-diff = \
-	if [ -d "$MR_REPO"/.svn ]; then \
-		svn diff "$@"; \
-	elif [ -d "$MR_REPO"/.git ]; then \
-		git diff "$@"; \
-	elif [ -d "$MR_REPO"/CVS ]; then \
-		cvs diff "$@"; \
-	else \
-		error "unknown repo type"; \
+	echo "Registering bzr url: $url in $MR_CONFIG"
+	mr -c "$MR_CONFIG" config "`pwd`" checkout="bzr clone '$url' '$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 "$url" ]; then
+		error "cannot determine git url"
 	fi
-log = \
-	if [ -d "$MR_REPO"/.svn ]; then \
-		svn log"$@"; \
-	elif [ -d "$MR_REPO"/.git ]; then \
-		git log "$@"; \
-	elif [ -d "$MR_REPO"/CVS ]; then \
-		cvs log "$@"; \
-	else \
-		error "unknown repo type"; \
+	echo "Registering git url: $url in $MR_CONFIG"
+	mr -c "$MR_CONFIG" config "`pwd`" checkout="git clone --bare '$url' '$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'"
+
+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 clone $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 $repo
+# fossil: messy to do
+
+
+help =
+ 	case `uname -s` in
+		SunOS)
+		SHOWMANFILE="man -f"
+		;;
+		Darwin)
+		SHOWMANFILE="man"
+		;;
+		*)
+		SHOWMANFILE="man -l"
+		;;
+	esac
+	if [ ! -e "$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"
 list = true
-
-help = \
-	if [ ! -e "$MR_PATH" ]; then \
-		error "cannot find program path";\
-	fi; \
-	(pod2man -c mr "$MR_PATH" | man -l -) || \
-		error "pod2man or man failed"
+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."
+right = echo "Not found."
+
+# vim:sw=8:sts=0:ts=8:noet