X-Git-Url: https://git.madduck.net/code/myrepos.git/blobdiff_plain/ecae835d593673f0f721b4de19ce2718f8ecb3bb..91d4aea5353b977fc40077d9534a6d28a3466873:/mr

diff --git a/mr b/mr
index 76c629c..4dbaa7a 100755
--- a/mr
+++ b/mr
@@ -1,7 +1,5 @@
 #!/usr/bin/perl
 
-#man{{{
-
 =head1 NAME
 
 mr - a Multiple Repository management tool
@@ -16,6 +14,8 @@ B<mr> [options] status
 
 B<mr> [options] commit [-m "message"]
 
+B<mr> [options] record [-m "message"]
+
 B<mr> [options] diff
 
 B<mr> [options] log
@@ -26,13 +26,17 @@ B<mr> [options] config section ["parameter=[value]" ...]
 
 B<mr> [options] action [params ...]
 
+B<mr> [options] [online|offline]
+
+B<mr> [options] remember action [params ...]
+
 =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
-respository. It supports any combination of subversion, git, cvs, mecurial and
-bzr repositories, and support for other revision control systems can easily be
-added.
+repository. It supports any combination of subversion, git, cvs, mecurial,
+bzr and darcs repositories, and support for other revision control systems can
+easily be added.
 
 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
@@ -62,10 +66,24 @@ 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.
@@ -115,14 +133,32 @@ To see the built-in library of shell functions contained in mr:
 The ~/.mrconfig file is used by default. To use a different config file,
 use the -c option.
 
+=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 most commands, and are passed on
@@ -143,25 +179,48 @@ the current working directory.
 
 Use the specified mrconfig file. The default is B<~/.mrconfig>
 
+=item -p
+
+Search in the current directory, and its parent directories and use
+the first B<.mrconfig> found, instead of the default B<~/.mrconfig>.
+
 =item -v
 
 Be verbose.
 
+=item -q
+
+Be quiet.
+
 =item -s
 
 Expand the statistics line displayed at the end to include information
 about exactly which repositories failed and were skipped, if any.
 
-=item -n
+=item -i
+
+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]
 
-Just operate on the repository for the current directory, do not 
-recurse into deeper repositories.
+If no number if specified, just operate on the repository for the current
+directory, do not recurse into deeper repositories.
 
-=item -j number
+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.
 
-Run the specified number of jobs in parallel. This can greatly speed up
-operations such as updates. It is not recommended for interactive
-operations.
+=item -j [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.
 
 =back
 
@@ -195,7 +254,9 @@ 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, 
+"[$HOSTNAME]", or "[${HOSTNAME}foo]")
 
 Within a section, each parameter defines a shell command to run to handle a
 given action. mr contains default handlers for "update", "status",
@@ -209,7 +270,11 @@ 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. The "MR_CONFIG" environment variable is set to the .mrconfig file
+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.
 
@@ -228,8 +293,18 @@ 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") -lt 12 ]
+  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
 
@@ -237,6 +312,15 @@ 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. (You
 should avoid chaining from repositories with untrusted committers.)
 
+=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
@@ -245,6 +329,29 @@ to use.
 
 =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.
+
+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 AUTHOR
 
 Copyright 2007 Joey Hess <joey@kitenet.net>
@@ -255,13 +362,12 @@ http://kitenet.net/~joey/code/mr/
 
 =cut
 
-#}}}
-
 use warnings;
 use strict;
 use Getopt::Long;
 use Cwd qw(getcwd abs_path);
-use POSIX "WNOHANG";
+
+# things that can happen when mr runs a command
 use constant {
 	OK => 0,
 	FAILED => 1,
@@ -269,236 +375,117 @@ use constant {
 	ABORT => 3,
 };
 
-$SIG{INT}=sub {
-	print STDERR "mr: interrupted\n";
-	exit 2;
-};
-
-$ENV{MR_CONFIG}="$ENV{HOME}/.mrconfig";
+# configurables
 my $config_overridden=0;
-my $directory=getcwd();
 my $verbose=0;
+my $quiet=0;
 my $stats=0;
-my $no_recurse=0;
+my $interactive=0;
+my $max_depth;
+my $no_chdir=0;
 my $jobs=1;
+my $directory=getcwd();
+$ENV{MR_CONFIG}="$ENV{HOME}/.mrconfig";
+
+# globals :-(
 my %config;
 my %configfiles;
 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" => sub { $ENV{MR_CONFIG}=$_[1]; $config_overridden=1 },
-	"v|verbose" => \$verbose,
-	"s|stats" => \$stats,
-	"n|no-recurse" => \$no_recurse,
-	"j|jobs=i" => \$jobs,
-);
-if (! $result || @ARGV < 1) {
-	die("Usage: mr [-d directory] action [params ...]\n".
-	    "(Use mr help for man page.)\n");
-
-}
+main();
 
-# 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."/".$Script;
-};
-
-loadconfig(\*DATA);
-loadconfig($ENV{MR_CONFIG});
-#use Data::Dumper;
-#print Dumper(\%config);
+my %rcs;
+sub rcs_test {
+	my ($action, $dir, $topdir, $subdir) = @_;
 
-# 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];
-	}
-	elsif (@matches == 0) {
-		die "mr: unknown action \"$action\" (known actions: ".
-			join(", ", sort keys %knownactions).")\n";
+	if (exists $rcs{$dir}) {
+		return $rcs{$dir};
 	}
-	else {
-		die "mr: ambiguous action \"$action\" (matches: ".
-			join(", ", @matches).")\n";
-	}
-}
 
-# commands that do not operate on all repos
-if ($action eq 'help') {
-	exec($config{''}{DEFAULT}{$action}) || die "exec: $!";
-}
-elsif ($action eq 'config') {
-	if (@ARGV < 2) {
-		die "mr config: not enough parameters\n";
+	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";
 	}
-	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=$1;
-		}
-	}
-	my %changefields;
-	foreach (@ARGV) {
-		if (/^([^=]+)=(.*)$/) {
-			$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 $action: $section $_ not set\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 $topdir$subdir\n";
+		return undef;
 	}
-	modifyconfig($ENV{MR_CONFIG}, $section, %changefields) if %changefields;
-	exit 0;
-}
-elsif ($action eq 'register') {
-	if (! $config_overridden) {
-		# Find the closest known mrconfig file to the current
-		# directory.
-		$directory.="/" unless $directory=~/\/$/;
-		foreach my $topdir (reverse sort keys %config) {
-			next unless length $topdir;
-			if ($directory=~/^\Q$topdir\E/) {
-				$ENV{MR_CONFIG}=$configfiles{$topdir};
-				last;
-			}
-		}
+	if (! length $rcs) {
+		return $rcs{$dir}=undef;
 	}
-	my $command="set -e; ".$config{''}{DEFAULT}{lib}."\n".
-		"my_action(){ $config{''}{DEFAULT}{$action}\n }; my_action ".
-		join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
-	print STDERR "mr $action: running >>$command<<\n" if $verbose;
-	exec($command) || die "exec: $!";
-}
-
-# 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 $no_recurse && $d ne $dir;
-		next if $dir ne $d && $dir !~ /^\Q$d\E/;
-		push @repos, [$dir, $topdir, $subdir];
+	else {
+		return $rcs{$dir}=$rcs;
 	}
 }
-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, $subdir];
-				last LEAF;
-			}
-		}
+	
+sub findcommand {
+	my ($action, $dir, $topdir, $subdir, $is_checkout) = @_;
+	
+	if (exists $config{$topdir}{$subdir}{$action}) {
+		return $config{$topdir}{$subdir}{$action};
 	}
-	$nochdir=1;
-}
 
-# run the action on each repository and print stats
-my (@ok, @failed, @skipped);
-if ($jobs > 1) {
-	mrs(@repos);
-}
-else {
-	foreach my $repo (@repos) {
-		record($repo, action($action, @$repo));
-		print "\n";
+	if ($is_checkout) {
+		return undef;
 	}
-}
-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";
-if ($stats) {
-	if (@skipped) {
-		print "mr $action: (skipped: ".join(" ", @skipped).")\n";
+
+	my $rcs=rcs_test(@_);
+
+	if (defined $rcs && 
+	    exists $config{$topdir}{$subdir}{$rcs."_".$action}) {
+		return $config{$topdir}{$subdir}{$rcs."_".$action};
 	}
-	if (@failed) {
-		print STDERR "mr $action: (failed: ".join(" ", @failed).")\n";
+	else {
+		return undef;
 	}
 }
-if (@failed) {
-	exit 1;
-}
-elsif (! @ok && @skipped) {
-	exit 1;
-}
-exit 0;
 
-sub action { #{{{
+sub action {
 	my ($action, $dir, $topdir, $subdir) = @_;
-
+	
 	$ENV{MR_CONFIG}=$configfiles{$topdir};
 	my $lib=exists $config{$topdir}{$subdir}{lib} ?
 	               $config{$topdir}{$subdir}{lib}."\n" : "";
+	my $is_checkout=($action eq 'checkout');
+
+	$ENV{MR_REPO}=$dir;
 
-	if ($action eq 'checkout') {
+	if ($is_checkout) {
 		if (-d $dir) {
 			print "mr $action: $dir already exists, skipping checkout\n" if $verbose;
 			return SKIPPED;
 		}
 
 		$dir=~s/^(.*)\/[^\/]+\/?$/$1/;
-
-		if (! -d $dir) {
-			print "mr $action: creating parent directory $dir\n" if $verbose;
-			system("mkdir", "-p", $dir);
-		}
 	}
-	elsif ($action eq 'update') {
+	elsif ($action =~ /update/) {
 		if (! -d $dir) {
 			return action("checkout", $dir, $topdir, $subdir);
 		}
 	}
-	
-	$ENV{MR_REPO}=$dir;
 
-	if (exists $config{$topdir}{$subdir}{skip}) {
+	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(){ $config{$topdir}{$subdir}{skip}\n }; my_action '$action'";
+			"my_action(){ $skiptest\n }; my_action '$action'";
 		print "mr $action: running skip test >>$test<<\n" if $verbose;
 		my $ret=system($test);
 		if ($ret != 0) {
@@ -516,26 +503,40 @@ sub action { #{{{
 			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";
 		return FAILED;
 	}
-	elsif (! exists $config{$topdir}{$subdir}{$action}) {
-		print STDERR "mr $action: no defined $action command for $topdir$subdir, skipping\n";
-		return SKIPPED;
+	elsif (! defined $command) {
+		my $rcs=rcs_test(@_);
+		if (! defined $rcs) {
+			print STDERR "mr $action: unknown repository type and no defined $action command for $topdir$subdir\n";
+			return FAILED;
+		}
+		else {
+			print STDERR "mr $action: no defined action for $rcs repository $topdir$subdir, skipping\n";
+			return SKIPPED;
+		}
 	}
 	else {
-		if (! $nochdir) {
-			print "mr $action: $topdir$subdir\n";
+		if (! $no_chdir) {
+			print "mr $action: $topdir$subdir\n" unless $quiet;
 		}
 		else {
-			print "mr $action: $topdir$subdir (in subdir $directory)\n";
+			my $s=$directory;
+			$s=~s/^\Q$topdir$subdir\E\/?//;
+			print "mr $action: $topdir$subdir (in subdir $s)\n" unless $quiet;
 		}
-		my $command="set -e; ".$lib.
-			"my_action(){ $config{$topdir}{$subdir}{$action}\n }; my_action ".
+		$command="set -e; ".$lib.
+			"my_action(){ $command\n }; my_action ".
 			join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
-		print STDERR "mr $action: running >>$command<<\n" if $verbose;
+		print "mr $action: running >>$command<<\n" if $verbose;
 		my $ret=system($command);
 		if ($ret != 0) {
 			if (($? & 127) == 2) {
@@ -549,6 +550,14 @@ sub action { #{{{
 			print STDERR "mr $action: failed ($ret)\n" if $verbose;
 			if ($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";
@@ -564,17 +573,20 @@ sub action { #{{{
 			return OK;
 		}
 	}
-} #}}}
+}
 
 # run actions on multiple repos, in parallel
-sub mrs { #{{{
+sub mrs {
+	my $action=shift;
+	my @repos=@_;
+
 	$| = 1;
 	my @active;
 	my @fhs;
 	my @out;
 	my $running=0;
 	while (@fhs or @repos) {
-		while ($running < $jobs && @repos) {
+		while ((!$jobs || $running < $jobs) && @repos) {
 			$running++;
 			my $repo = shift @repos;
 			pipe(my $outfh, CHILD_STDOUT);
@@ -619,7 +631,6 @@ sub mrs { #{{{
 						    	waitpid($active[$i][0], 0);
 							print STDOUT $out[$i][0];
 							print STDERR $out[$i][1];
-							print "\n";
 							record($active[$i][1], $? >> 8);
 						    	splice(@fhs, $i, 1);
 						    	splice(@active, $i, 1);
@@ -632,17 +643,24 @@ sub mrs { #{{{
 			}
 		}
 	}
-} #}}}
+}
 
-sub record { #{{{
+sub record {
 	my $dir=shift()->[0];
 	my $ret=shift;
 
 	if ($ret == OK) {
 		push @ok, $dir;
+		print "\n";
 	}
 	elsif ($ret == FAILED) {
+		if ($interactive) {
+			chdir($dir) unless $no_chdir;
+			print STDERR "mr: Starting interactive shell. Exit shell to continue.\n";
+			system((getpwuid($<))[8]);
+		}
 		push @failed, $dir;
+		print "\n";
 	}
 	elsif ($ret == SKIPPED) {
 		push @skipped, $dir;
@@ -653,9 +671,29 @@ sub record { #{{{
 	else {
 		die "unknown exit status $ret";
 	}
-} #}}}
+}
 
-sub showstat { #{{{
+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";
+		}
+	}
+}
+
+sub showstat {
 	my $count=shift;
 	my $singular=shift;
 	my $plural=shift;
@@ -663,10 +701,85 @@ sub showstat { #{{{
 		return "$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;
+}
+
+# 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 $dir=($subdir =~/^\//) ? $subdir : $topdir.$subdir;
+		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 $dir=($subdir =~/^\//) ? $subdir : $topdir.$subdir;
+			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 %loaded;
-sub loadconfig { #{{{
+sub loadconfig {
 	my $f=shift;
 
 	my @toload;
@@ -725,7 +838,7 @@ sub loadconfig { #{{{
 		chomp;
 		next if /^\s*\#/ || /^\s*$/;
 		if (/^\[([^\]]*)\]\s*$/) {
-			$section=$1;
+			$section=expandenv($1);
 		}
 		elsif (/^(\w+)\s*=\s*(.*)/) {
 			my $parameter=$1;
@@ -739,6 +852,15 @@ sub loadconfig { #{{{
 				chomp $value;
 			}
 
+			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";
 			}
@@ -756,18 +878,23 @@ sub loadconfig { #{{{
 			}
 			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") {
 					my $ret=system($value);
 					if ($ret != 0) {
 						if (($? & 127) == 2) {
-							print STDERR "mr $action: chain test interrupted\n";
+							print STDERR "mr: chain test interrupted\n";
 							exit 2;
 						}
 						elsif ($? & 127) {
-							print STDERR "mr $action: chain test received signal ".($? & 127)."\n";
+							print STDERR "mr: chain test received signal ".($? & 127)."\n";
 						}
 					}
 					else {
@@ -784,9 +911,9 @@ sub loadconfig { #{{{
 	foreach (@toload) {
 		loadconfig($_);
 	}
-} #}}}
+}
 
-sub modifyconfig { #{{{
+sub modifyconfig {
 	my $f=shift;
 	# the section to modify or add
 	my $targetsection=shift;
@@ -837,7 +964,7 @@ sub modifyconfig { #{{{
 				$addfields->();
 			}
 
-			$section=$1;
+			$section=expandenv($1);
 
 			push @out, $_;
 		}
@@ -881,11 +1008,236 @@ sub modifyconfig { #{{{
 	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 '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: $!";
+}
+
+# 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_nearest_mrconfig {
+	my $dir=getcwd();
+	while (length $dir) {
+		if (-e "$dir/.mrconfig") {
+			return "$dir/.mrconfig";
+		}
+		$dir=~s/\/[^\/]*$//;
+	}
+	die "no .mrconfig found in path\n";
+}
+
+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 { $ENV{MR_CONFIG}=find_nearest_mrconfig(); $config_overridden=1 },
+		"v|verbose" => \$verbose,
+		"q|quiet" => \$quiet,
+		"s|stats" => \$stats,
+		"i|interactive" => \$interactive,
+		"n|no-recurse:i" => \$max_depth,
+		"j|jobs:i" => \$jobs,
+	);
+	if (! $result || @ARGV < 1) {
+		die("Usage: mr [-d directory] 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."/".$Script;
+	};
+}
+
+sub main {
+	getopts();
+	init();
+
+	loadconfig(\*DATA);
+	loadconfig($ENV{MR_CONFIG});
+	#use Data::Dumper; print Dumper(\%config);
+	
+	my $action=expandaction(shift @ARGV);
+	dispatch($action);
+	showstats($action);
+
+	if (@failed) {
+		exit 1;
+	}
+	elsif (! @ok && @skipped) {
+		exit 1;
+	}
+	else {
+		exit 0;
+	}
+}
 
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
-#DATA{{{
 __DATA__
 [ALIAS]
 co = checkout
@@ -893,13 +1245,23 @@ 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() {
-		for dir in .git .svn .bzr CVS .hg; do
+		if [ -z "$1" ] || [ -z "$2" ]; then
+			error "mr: usage: hours_since action num"
+		fi
+		for dir in .git .svn .bzr CVS .hg _darcs; do
 			if [ -e "$MR_REPO/$dir" ]; then
 				flagfile="$MR_REPO/$dir/.mr_last$1"
 				break
@@ -908,136 +1270,157 @@ lib =
 		if [ -z "$flagfile" ]; then
 			error "cannot determine flag filename"
 		fi
-		perl -wle 'print -f shift() ? int((-M _) * 24) : 9999' "$flagfile"
-		touch "$flagfile"
-	}
-
-update =
-	if [ -d "$MR_REPO"/.svn ]; then
-		svn update "$@"
-	elif [ -d "$MR_REPO"/.git ]; then
-		if [ -z "$@" ]; then
-			git pull -t origin master
+		delta=`perl -wle 'print -f shift() ? int((-M _) * 24) : 9999' "$flagfile"`
+		if [ "$delta" -lt "$2" ]; then
+			exit 0
 		else
-			git pull "$@"
+			touch "$flagfile"
+			exit 1
 		fi
-	elif [ -d "$MR_REPO"/.bzr ]; then
-		bzr merge "$@"
-	elif [ -d "$MR_REPO"/CVS ]; then
-		cvs update "$@"
-	elif [ -d "$MR_REPO"/.hg ]; then
-		hg pull "$@" && hg update "$@"
-	else
-		error "unknown repo type"
-	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 "$MR_REPO"/CVS ]; then
-		cvs status "$@"
-	elif [ -d "$MR_REPO"/.hg ]; then
-		hg status "$@"
-	else
-		error "unknown repo type"
-	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 "$MR_REPO"/CVS ]; then
-		cvs commit "$@"
-	elif [ -d "$MR_REPO"/.hg ]; then
-		hg commit -m "$@" && hg push
-	else
-		error "unknown repo type"
-	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 "$MR_REPO"/CVS ]; then
-		cvs diff "$@"
-	elif [ -d "$MR_REPO"/.hg ]; then
-		hg diff "$@"
-	else
-		error "unknown repo type"
+	}
+
+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
+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 "$@"
+darcs_update = darcs pull -a "$@"
+
+svn_status = svn status "$@"
+git_status = git status "$@" || true
+bzr_status = bzr status "$@"
+cvs_status = cvs status "$@"
+hg_status  = hg status "$@"
+darcs_status = darcs whatsnew -ls "$@" || true
+
+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
+
+git_record = git commit -a "$@"
+bzr_record = bzr commit "$@"
+hg_record  = hg commit -m "$@"
+darcs_record = darcs record -a -m "$@"
+
+svn_push = :
+git_push = git push "$@"
+bzr_push = bzr push "$@"
+cvs_push = :
+hg_push = hg push "$@"
+darcs_push = darcs push -a "$@"
+
+svn_diff = svn diff "$@"
+git_diff = git diff "$@"
+bzr_diff = bzr diff "$@"
+cvs_diff = cvs diff "$@"
+hg_diff  = hg diff "$@"
+darcs_diff = darcs diff -u "$@"
+
+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 "$@"
+
+svn_register =
+	url=`LC_ALL=C svn info . | grep -i '^URL:' | cut -d ' ' -f 2`
+	if [ -z "$url" ]; then
+		error "cannot determine svn url"
 	fi
-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 "$MR_REPO"/CVS ]; then
-		cvs log "$@"
-	elif [ -d "$MR_REPO"/.hg ]; then
-		hg log "$@"
-	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
-register =
-	if [ -n "$1" ]; then
-		cd "$1"
+	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
-	basedir="$(basename $(pwd))"
-	if [ -d .svn ]; then
-		url=$(LANG=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 $basedir"
-	elif [ -d .git ]; then
-		url=$(LANG=C git-config --get remote.origin.url)
-		if [ -z "$url" ]; then
-			error "cannot determine git url"
+	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 git url: $url in $MR_CONFIG"
-		mr -c "$MR_CONFIG" config "$(pwd)" checkout="git clone $url $basedir"
-	elif [ -d .bzr ]; then
-		url=$(cat .bzr/branch/parent)
-		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 clone $url $basedir"
-	elif [ -d CVS ]; then
-		repo=$(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 $basedir $repo"
-	elif [ -d .hg ]; then
-		url=$(hg showconfig paths.default)
-		echo "Registering mercurial repo url: $url in $MR_CONFIG"
-		mr -c "$MR_CONFIG" config "$(pwd)" \
-			checkout="hg clone $url $basedir"
-	else
-		error "unable to register this repo type"
+	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'"
+
 help =
 	if [ ! -e "$MR_PATH" ]; then
 		error "cannot find program path"
 	fi
-	(pod2man -c mr "$MR_PATH" | man -l -) || error "pod2man or man failed"
+	tmp=$(mktemp -t mr.XXXXXXXXXX) || error "mktemp failed"
+	trap "rm -f $tmp" exit
+	pod2man -c mr "$MR_PATH" > "$tmp" || error "pod2man failed"
+	man -l "$tmp" || error "man failed"
 list = true
 config = 
 
+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