X-Git-Url: https://git.madduck.net/code/myrepos.git/blobdiff_plain/920d455be8153c1eb9b826d3b894aadc38d9aec1..de0874e8884604b08e3a3b9a1bf682cf2b88f1f2:/mr?ds=sidebyside

diff --git a/mr b/mr
index 0e14168..2187aa0 100755
--- a/mr
+++ b/mr
@@ -209,7 +209,11 @@ 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.
 
@@ -247,6 +251,15 @@ 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
@@ -255,6 +268,18 @@ 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.
+
 =head1 AUTHOR
 
 Copyright 2007 Joey Hess <joey@kitenet.net>
@@ -289,31 +314,22 @@ my $config_overridden=0;
 my $verbose=0;
 my $stats=0;
 my $no_recurse=0;
+my $no_chdir=0;
 my $jobs=1;
 my %config;
 my %configfiles;
 my %knownactions;
 my %alias;
 my $directory=getcwd();
+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");
+getopts();
 
-}
+# This can happen if it's run in a directory that was removed
+# or other strangeness.
 if (! defined $directory) {
 	die("mr: failed to determine working directory\n");
 }
-
 # Make sure MR_CONFIG is an absolute path, but don't use abs_path since
 # the config file might be a symlink to elsewhere, and the directory it's
 # in is significant.
@@ -331,175 +347,89 @@ loadconfig($ENV{MR_CONFIG});
 #use Data::Dumper;
 #print Dumper(\%config);
 
-# alias expansion and command stemming
-my $action=shift @ARGV;
-if (exists $alias{$action}) {
-	$action=$alias{$action};
+my $action=expandaction(shift @ARGV);
+dispatch($action);
+showstats($action);
+
+if (@failed) {
+	exit 1;
+}
+elsif (! @ok && @skipped) {
+	exit 1;
 }
-if (! exists $knownactions{$action}) {
-	my @matches = grep { /^\Q$action\E/ }
-		keys %knownactions, keys %alias;
-	if (@matches == 1) {
-		$action=$matches[0];
+else {
+	exit 0;
+}
+
+sub dispatch { #{{{
+	my $action=shift;
+
+	# actions that do not operate on all repos
+	if ($action eq 'help') {
+		help(@ARGV);
 	}
-	elsif (@matches == 0) {
-		die "mr: unknown action \"$action\" (known actions: ".
-			join(", ", sort keys %knownactions).")\n";
+	elsif ($action eq 'config') {
+		config(@ARGV);
 	}
-	else {
-		die "mr: ambiguous action \"$action\" (matches: ".
-			join(", ", @matches).")\n";
+	elsif ($action eq 'register') {
+		register(@ARGV);
 	}
-}
 
-# 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";
+	if ($jobs > 1) {
+		mrs($action, selectrepos());
 	}
-	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;
+	else {
+		foreach my $repo (selectrepos()) {
+			record($repo, action($action, @$repo));
 		}
 	}
-	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 $_ not set\n";
-			}
-		}
+} #}}}
+
+sub rcs_test { #{{{
+	my ($action, $dir, $topdir, $subdir) = @_;
+
+	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 $rcs; fi\n";
 	}
-	modifyconfig($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;
-			}
-		}
+	$test=$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 (! length $rcs) {
+		return 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: $!";
-}
-
-# an ordered list of repos
-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},
-		};
+	else {
+		return $rcs;
 	}
-}
-@list = sort {
-		$a->{order}  <=> $b->{order}
-		             ||
-		$a->{topdir} cmp $b->{topdir}
-		             ||
-		$a->{subdir} cmp $b->{subdir}
-	} @list;
-
-# work out what repos to act on
-my @repos;
-my $nochdir=0;
-foreach my $repo (@list) {
-	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 $no_recurse && $d ne $dir;
-	next if $dir ne $d && $dir !~ /^\Q$d\E/;
-	push @repos, [$dir, $topdir, $subdir];
-}
-if (! @repos) {
-	# fallback to find a leaf repo
-	foreach my $repo (reverse @list) {
-		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, $subdir];
-			last;
-		}
+} #}}}
+	
+sub findcommand { #{{{
+	my ($action, $dir, $topdir, $subdir) = @_;
+	
+	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));
-	}
-}
-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 { #{{{
 	my ($action, $dir, $topdir, $subdir) = @_;
@@ -526,12 +456,15 @@ sub action { #{{{
 			return action("checkout", $dir, $topdir, $subdir);
 		}
 	}
-	
+
 	$ENV{MR_REPO}=$dir;
 
-	if (exists $config{$topdir}{$subdir}{skip}) {
+	my $skiptest=findcommand("skip", $dir, $topdir, $subdir);
+	my $command=findcommand($action, $dir, $topdir, $subdir);
+
+	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) {
@@ -550,16 +483,23 @@ sub action { #{{{
 		}
 	}
 	
-	if (! $nochdir && ! chdir($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 command for $rcs repository $topdir$subdir, skipping\n";
+			return SKIPPED;
+		}
 	}
 	else {
-		if (! $nochdir) {
+		if (! $no_chdir) {
 			print "mr $action: $topdir$subdir\n";
 		}
 		else {
@@ -567,10 +507,10 @@ sub action { #{{{
 			$s=~s/^\Q$topdir$subdir\E\/?//;
 			print "mr $action: $topdir$subdir (in subdir $s)\n";
 		}
-		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) {
@@ -603,6 +543,9 @@ sub action { #{{{
 
 # run actions on multiple repos, in parallel
 sub mrs { #{{{
+	my $action=shift;
+	my @repos=@_;
+
 	$| = 1;
 	my @active;
 	my @fhs;
@@ -691,6 +634,25 @@ sub record { #{{{
 	}
 } #}}}
 
+sub showstats { #{{{
+	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";
+		}
+		if (@failed) {
+			print STDERR "mr $action: (failed: ".join(" ", @failed).")\n";
+		}
+	}
+} #}}}
+
 sub showstat { #{{{
 	my $count=shift;
 	my $singular=shift;
@@ -701,6 +663,64 @@ sub showstat { #{{{
 	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 $no_recurse && $d ne $dir;
+		next if $dir ne $d && $dir !~ /^\Q$d\E/;
+		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;
+} #}}}
+
 my %loaded;
 sub loadconfig { #{{{
 	my $f=shift;
@@ -775,6 +795,12 @@ sub loadconfig { #{{{
 				chomp $value;
 			}
 
+			if ($parameter eq "include") {
+				print "mr: including output of \"$value\"\n" if $verbose;
+				unshift @lines, `$value`;
+				next;
+			}
+
 			if (! defined $section) {
 				die "$f line $.: parameter ($parameter) not in section\n";
 			}
@@ -792,7 +818,12 @@ 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") {
@@ -918,6 +949,123 @@ sub modifyconfig { #{{{
 	print $out @out;
 	close $out;	
 } #}}}
+	
+sub help { #{{{
+	exec($config{''}{DEFAULT}{$action}) || 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 $action: $section $_ not set\n";
+			}
+		}
+	}
+	modifyconfig($ENV{MR_CONFIG}, $section, %changefields) if %changefields;
+	exit 0;
+} #}}}
+
+sub 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};
+				$directory=$topdir;
+				last;
+			}
+		}
+	}
+	if (@ARGV) {
+		my $subdir=shift @ARGV;
+		if (! chdir($subdir)) {
+			print STDERR "mr $action: failed to chdir to $subdir: $!\n";
+		}
+	}
+
+	$ENV{MR_REPO}=getcwd();
+	my $command=findcommand("register", $ENV{MR_REPO}, $directory, 'DEFAULT');
+	if (! defined $command) {
+		die "mr $action: 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 $action: running >>$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 getopts { #{{{
+	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");
+	}
+} #}}}
 
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
@@ -931,7 +1079,6 @@ ls = list
 [DEFAULT]
 order = 10
 lib =
-	PWD="$pwd"
 	error() {
 		echo "mr: $@" >&2
 		exit 1
@@ -963,204 +1110,98 @@ lib =
 			exit 1
 		fi
 	}
-	get_git_repo_type()
-	{
-		if [ -d "$1"/.git ] && [ -d "$1"/.git/refs/heads ] &&
-			[ -d "$1"/.git/objects ] && [ -f "$1"/.git/config ];
-			then
-			echo non-bare
-		elif [ -d "$1"/refs/heads ] && [ -d "$1"/refs/tags ] &&
-			[ -d "$1"/objects ] && [ -f "$1"/config ]; then
-			local bare
-			bare="$(GIT_CONFIG="$1"/config git-config --get core.bare)"
-			case "$bare" in
-				true) echo bare;;
-				false) echo fake-bare;;
-				*) return 255;;
-			esac
-		else
-			return 1
-		fi
-	}
-	is_git_repo() {
-		get_git_repo_type "$1" >/dev/null
-	}
-	get_repo_type() {
-		if [ -d "$1"/.svn ]; then
-			echo svn
-		elif is_git_repo "$1"; then
-			echo git
-		elif [ -d "$1"/.bzr ]; then
-			echo bzr
-		elif [ -d "$1"/CVS ]; then
-			echo CVS
-		elif [ -d "$1"/.hg ]; then
-			echo hg
-		elif [ -d "$1"/_darcs ]; then
-			echo darcs
-		else
-			echo unknown
-		fi
-	}
 
-update =
-	case "$(get_repo_type "$MR_REPO")" in
-	svn) svn update "$@";;
-	git)
-		# all this is because of a bug in git-fetch, which requires GIT_DIR set
-		local git_dir_override; git_dir_override=.git
-		case "$(get_git_repo_type "$MR_REPO")" in
-			fake-bare) git_dir_override="$MR_REPO";;
-		esac
-		args="$@"
-		[ -z "$args" ] && args="-t origin master"
-		eval GIT_DIR="$git_dir_override" git pull "$args"
-		;;
-	bzr) bzr merge "$@";;
-	CVS) cvs update "$@";;
-	hg) hg pull "$@" && hg update "$@";;
-	darcs) darcs pull -a "$@";;
-	*) error "unknown repo type";;
-	esac
-
-status =
-	case "$(get_repo_type "$MR_REPO")" in
-	svn) svn status "$@";;
-	git) git status "$@" || :;;
-	bzr) bzr status "$@";;
-	CVS) cvs status "$@";;
-	hg) hg status "$@";;
-	darcs) darcs whatsnew -ls "$@";;
-	*) error "unknown repo type";;
-	esac
-
-commit =
-	case "$(get_repo_type "$MR_REPO")" in
-	svn) svn commit "$@";;
-	git)
-		case "$(get_git_repo_type "$MR_REPO")" in
-			bare) error "cannot commit to bare git repositories";;
-			fake-bare) error "commit does not work for fake bare git repositories (yet).";;
-		esac
-		git commit -a "$@" && git push --all
-		;;
-	bzr) bzr commit "$@" && bzr push;;
-	CVS) cvs commit "$@";;
-	hg) hg commit -m "$@" && hg push;;
-	darcs) darcs commit -a -m "$@" && darcs push -a;;
-	*) error "unknown repo type";;
-	esac
-
-diff =
-	case "$(get_repo_type "$MR_REPO")" in
-	svn) svn diff "$@";;
-	git)
-		case "$(get_git_repo_type "$MR_REPO")" in
-			bare) error "cannot diff in bare git repositories";;
-			fake-bare) error "diff does not work for fake bare git repositories (yet).";;
-		esac
-		git diff "$@"
-		;;
-	bzr) bzr diff "$@";;
-	CVS) cvs diff "$@";;
-	hg) hg diff "$@";;
-	darcs) darcs diff "$@";;
-	*) error "unknown repo type";;
-	esac
-
-log =
-	case "$(get_repo_type "$MR_REPO")" in
-	svn) svn log"$@";;
-	git) git log "$@";;
-	bzr) bzr log "$@";;
-	CVS) cvs log "$@";;
-	hg) hg log "$@";;
-	darcs) darcs changes "$@";;
-	*) error "unknown repo type";;
-	esac
-
-register =
-	if [ -n "$1" ]; then
-		cd "$1"
+svn_test = test -d "$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 = if [ "$@" ]; then git pull "$@"; else git pull -t origin master; fi
+bzr_update = bzr merge "$@"
+cvs_update = cvs update "$@"
+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 "$@"
+
+svn_commit = svn commit "$@"
+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 commit -a -m "$@" && darcs push -a
+
+svn_diff = svn diff "$@"
+git_diff = git diff "$@"
+bzr_diff = bzr diff "$@"
+cvs_diff = cvs diff "$@"
+hg_diff  = hg diff "$@"
+darcs_diff = darcs diff "$@"
+
+svn_log = svn log "$@"
+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=$(LANG=C svn info . | grep -i ^URL: | cut -d ' ' -f 2)
+	if [ -z "$url" ]; then
+		error "cannot determine svn url"
 	fi
-	basedir="${PWD##*/}"
-	case "$(get_repo_type .)" in
-	svn)
-		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 $basedir"
-		;;
-	git)
-		local repo_type; repo_type="$(get_git_repo_type .)"
-		local config;
-		case "$repo_type" in
-			non-bare) config=.git/config;;
-			bare|fake-bare) config=config;;
-		esac
-		url="$(LANG=C GIT_CONFIG="$config" git-config --get remote.origin.url)" || :
-		if [ -z "$url" ]; then
-			error "cannot determine git url"
-		fi
-		local clone_opts add_cmd work_tree suffix
-		case "$repo_type" in
-			fake-bare)
-				# this seems like a fake bare repo and needs a worktree
-				work_tree="$(git-config --get core.worktree)" || :
-				work_tree="${work_tree%%/}/"
-				if [ ! -d "$work_tree" ]; then
-					error "git worktree '$work_tree' does not exist"
-				fi
-				clone_opts=" --no-checkout"
-				add_cmd="$add_cmd && cd $basedir"
-				add_cmd="$add_cmd && git read-tree HEAD"
-				add_cmd="$add_cmd && git checkout-index -a --prefix='$work_tree' || :"
-				add_cmd="$add_cmd; git config core.worktree '$work_tree'"
-				add_cmd="$add_cmd && mv .git/* . && rmdir .git"
-				suffix=" (with worktree $work_tree)"
-				;;
-			bare)
-				clone_opts=" --bare"
-				suffix=" (bare repository)"
-				;;
-		esac
-		echo "Registering git url: $url in $MR_CONFIG${suffix:-}"
-		mr -c "$MR_CONFIG" config "$PWD" checkout="git clone${clone_opts:-} $url $basedir${add_cmd:-}"
-		;;
-	bzr)
-		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 $basedir"
-		;;
-	CVS)
-		repo=$(cat CVS/Repository)
-		root=$(cat CVS/Root)
-		if [ -z "$root" ]; then
-			error "cannot determine cvs root"
+	echo "Registering svn url: $url in $MR_CONFIG"
+	mr -c "$MR_CONFIG" config "`pwd`" checkout="svn co '$url' '$MR_REPO'"
+git_register = 
+	url="$(LANG=C git-config --get remote.origin.url)" || true
+	if [ -z "$url" ]; then
+		error "cannot determine git url"
+	fi
+	echo "Registering git url: $url in $MR_CONFIG"
+	mr -c "$MR_CONFIG" config "`pwd`" checkout="git clone '$url' '$MR_REPO'"
+bzr_register =
+	url=$(cat .bzr/branch/parent)
+	if [ -z "$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 '$url' '$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 $basedir $repo"
-		;;
-	hg)
-		url=$(hg showconfig paths.default)
-		echo "Registering mercurial repo url: $url in $MR_CONFIG"
-		mr -c "$MR_CONFIG" config "$PWD" \
-			checkout="hg clone $url $basedir"
-		;;
-	darcs)
-		url=$(cat _darcs/prefs/defaultrepo)
-		echo "Registering darcs repository $url in $MR_CONFIG"
-		mr -c "$MR_CONFIG" config "$PWD" \
-			checkout="darcs get $url $basedir"
-		;;
-	*) error "unable to register this repo type";;
-	esac
+	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 '$url'p '$MR_REPO'"
+git_bare_register = 
+	url="$(LANG=C GIT_CONFIG=config git-config --get remote.origin.url)" || true
+	if [ -z "$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