fix -j mode to preserve stderr distinct from stdout,

[code/myrepos.git] / mr

diff --git a/mr b/mr
index adc05464671b0644be5e04b2b8167c6b89202cb6..1aee75afa54ed0c40eb5811b034774af234917f5 100755 (executable)
--- a/mr
+++ b/mr
@@ -22,19 +22,19 @@ B<mr> [options] log
 
 B<mr> [options] register [repository]
 
 
 B<mr> [options] register [repository]
 

-B<mr> [options] config section [parameter=[value] ...]
+B<mr> [options] config section ["parameter=[value]" ...]

 
 B<mr> [options] action [params ...]
 
 =head1 DESCRIPTION
 
 
 B<mr> [options] 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, and bzr repositories, 
-and support for other revision control systems can easily be added.
+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.

 
 

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

 working directory. Or, if you are in a subdirectory of a repository that
 contains no other registered repositories, it will stay in that directory,
 and work on only that repository,
 working directory. Or, if you are in a subdirectory of a repository that
 contains no other registered repositories, it will stay in that directory,
 and work on only that repository,


@@ -86,13 +86,16 @@ List the repositories that mr will act on.
 
 =item register
 
 
 =item register
 

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

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

 =item config
 
 =item config
 

-Adds, modifies, removes, or prints a value from the mrconfig file. The next
+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.
 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.


@@ -105,6 +108,13 @@ To show the command that mr uses to update the repository in src/foo:
 
   mr config src/foo update
 
 
   mr config src/foo update
 

+To see the built-in library of shell functions contained in mr:
+
+  mr config DEFAULT lib
+
+The ~/.mrconfig file is used by default. To use a different config file,
+use the -c option.
+

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


@@ -131,13 +141,28 @@ the current working directory.
 
 =item -c mrconfig
 
 
 =item -c mrconfig
 

-Use the specified mrconfig file, instead of looking for one in your home
-directory.
+Use the specified mrconfig file. The default is B<~/.mrconfig>

 
 =item -v
 
 Be verbose.
 
 
 =item -v
 
 Be verbose.
 

+=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
+
+Just operate on the repository for the current directory, do not 
+recurse into deeper repositories.
+
+=item -j number
+
+Run the specified number of jobs in parallel. This can greatly speed up
+operations such as updates. It is not recommended for interactive
+operations.
+

 =back
 
 =head1 FILES
 =back
 
 =head1 FILES


@@ -173,17 +198,20 @@ that contains the mrconfig file, but you can also choose to use absolute
 paths.
 
 Within a section, each parameter defines a shell command to run to handle a
 paths.
 
 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.
 
 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
 The "MR_REPO" environment variable is set to the path to the top of the

-repository.
+repository. 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:
 
 
 A few parameters have special meanings:
 


@@ -191,7 +219,7 @@ A few parameters have special meanings:
 
 =item skip
 
 
 =item skip
 

-If the "skip" parameter is set and its command returns nonzero, then B<mr>
+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.
 
 will skip acting on that repository. The command is passed the action
 name in $1.
 


@@ -205,18 +233,10 @@ been at least 12 hours since the last update.
 
 =item chain
 
 
 =item chain
 

-If the "chain" parameter is set and its command returns nonzero, then B<mr>
+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.)
 
 will try to load a .mrconfig file from the root of the repository. (You
 should avoid chaining from repositories with untrusted committers.)
 

-=item deleted
-
-If the "deleted" parameter is set and its command returns nonzero, then
-B<mr> will treat the repository as deleted. It won't ever actually delete
-the repository, but it will warn if it sees the repsoitory's directory.
-This is useful when one mrconfig file is shared amoung multiple machines,
-to keep track of and remember to delete old repositories.
-

 =item lib
 
 The "lib" parameter can specify some shell code that will be run before each
 =item lib
 
 The "lib" parameter can specify some shell code that will be run before each


@@ -241,19 +261,39 @@ use warnings;
 use strict;
 use Getopt::Long;
 use Cwd qw(getcwd abs_path);
 use strict;
 use Getopt::Long;
 use Cwd qw(getcwd abs_path);

+use POSIX "WNOHANG";
+use constant {
+       OK => 0,
+       FAILED => 1,
+       SKIPPED => 2,
+       ABORT => 3,
+};
+
+$SIG{INT}=sub {
+       print STDERR "mr: interrupted\n";
+       exit 2;
+};

 
 

+$ENV{MR_CONFIG}="$ENV{HOME}/.mrconfig";
+my $config_overridden=0;

 my $directory=getcwd();
 my $directory=getcwd();

-my $config="$ENV{HOME}/.mrconfig";

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

+my $stats=0;
+my $no_recurse=0;
+my $jobs=1;

 my %config;
 my %config;

+my %configfiles;

 my %knownactions;
 my %alias;
 
 Getopt::Long::Configure("no_permute");
 my $result=GetOptions(
        "d|directory=s" => sub { $directory=abs_path($_[1]) },
 my %knownactions;
 my %alias;
 
 Getopt::Long::Configure("no_permute");
 my $result=GetOptions(
        "d|directory=s" => sub { $directory=abs_path($_[1]) },

-       "c|config=s" => \$config,
-       "verbose" => \$verbose,
+       "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".
 );
 if (! $result || @ARGV < 1) {
        die("Usage: mr [-d directory] action [params ...]\n".


@@ -261,16 +301,23 @@ if (! $result || @ARGV < 1) {
 
 }
 
 
 }
 

-loadconfig(\*DATA);
-loadconfig($config);
-#use Data::Dumper;
-#print Dumper(\%config);
-
+# Make sure MR_CONFIG is an absolute path, but don't use abs_path since
+# the config file might be a symlink to elsewhere, and the directory it's
+# in is significant.
+if ($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;
 };
 
 eval {
        use FindBin qw($Bin $Script);
        $ENV{MR_PATH}=$Bin."/".$Script;
 };
 

+loadconfig(\*DATA);
+loadconfig($ENV{MR_CONFIG});
+#use Data::Dumper;
+#print Dumper(\%config);
+

 # alias expansion and command stemming
 my $action=shift @ARGV;
 if (exists $alias{$action}) {
 # alias expansion and command stemming
 my $action=shift @ARGV;
 if (exists $alias{$action}) {


@@ -292,6 +339,7 @@ if (! exists $knownactions{$action}) {
        }
 }
 
        }
 }
 

+# commands that do not operate on all repos

 if ($action eq 'help') {
        exec($config{''}{DEFAULT}{$action}) || die "exec: $!";
 }
 if ($action eq 'help') {
        exec($config{''}{DEFAULT}{$action}) || die "exec: $!";
 }


@@ -301,8 +349,10 @@ elsif ($action eq 'config') {
        }
        my $section=shift;
        if ($section=~/^\//) {
        }
        my $section=shift;
        if ($section=~/^\//) {

-               # try to convert to a path relative to $config's dir
-               my ($dir)=$config=~/^(.*\/)[^\/]+$/;
+               # 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=$1;
                }
                if ($section=~/^\Q$dir\E(.*)/) {
                        $section=$1;
                }


@@ -319,6 +369,7 @@ elsif ($action eq 'config') {
                                    exists $config{$topdir}{$section}{$_}) {
                                        print $config{$topdir}{$section}{$_}."\n";
                                        $found=1;
                                    exists $config{$topdir}{$section}{$_}) {
                                        print $config{$topdir}{$section}{$_}."\n";
                                        $found=1;

+                                       last if $section eq 'DEFAULT';

                                }
                        }
                        if (! $found) {
                                }
                        }
                        if (! $found) {


@@ -326,10 +377,22 @@ elsif ($action eq 'config') {
                        }
                }
        }
                        }
                }
        }

-       modifyconfig($config, $section, %changefields) if %changefields;
+       modifyconfig($ENV{MR_CONFIG}, $section, %changefields) if %changefields;

        exit 0;
 }
 elsif ($action eq 'register') {
        exit 0;
 }
 elsif ($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;
+                       }
+               }
+       }

        my $command="set -e; ".$config{''}{DEFAULT}{lib}."\n".
                "my_action(){ $config{''}{DEFAULT}{$action}\n }; my_action ".
                join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
        my $command="set -e; ".$config{''}{DEFAULT}{lib}."\n".
                "my_action(){ $config{''}{DEFAULT}{$action}\n }; my_action ".
                join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);


@@ -347,7 +410,8 @@ foreach my $topdir (sort keys %config) {
                my $d=$directory;
                $dir.="/" unless $dir=~/\/$/;
                $d.="/" unless $d=~/\/$/;
                my $d=$directory;
                $dir.="/" unless $dir=~/\/$/;
                $d.="/" unless $d=~/\/$/;

-               next if $dir ne $directory && $dir !~ /^\Q$directory\E/;
+               next if $no_recurse && $d ne $dir;
+               next if $dir ne $d && $dir !~ /^\Q$d\E/;

                push @repos, [$dir, $topdir, $subdir];
        }
 }
                push @repos, [$dir, $topdir, $subdir];
        }
 }


@@ -369,40 +433,60 @@ if (! @repos) {
        $nochdir=1;
 }
 
        $nochdir=1;
 }
 

-my (@failed, @ok, @skipped);
-foreach my $repo (@repos) {
-       action($action, @$repo);
+# run the action on each repository and print stats
+my (@ok, @failed, @skipped);
+if ($jobs > 1) {
+       mrs(@repos);

 }
 }

+else {
+       foreach my $repo (@repos) {
+               record($repo, action($action, @$repo));
+               print "\n";
+       }
+}
+if (! @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";
+       }
+}
+if (@failed) {
+       exit 1;
+}
+elsif (! @ok && @skipped) {
+       exit 1;
+}
+exit 0;

 
 sub action { #{{{
        my ($action, $dir, $topdir, $subdir) = @_;
 
 sub action { #{{{
        my ($action, $dir, $topdir, $subdir) = @_;

-       
-       my $lib= exists $config{$topdir}{$subdir}{lib} ?
-                       $config{$topdir}{$subdir}{lib}."\n" : "";

 
 

-       if (exists $config{$topdir}{$subdir}{deleted}) {
-               if (! -d $dir) {
-                       return;
-               }
-               else {
-                       my $test="set -e;".$lib.$config{$topdir}{$subdir}{deleted};
-                       print "mr $action: running deleted test >>$test<<\n" if $verbose;
-                       my $ret=system($test);
-                       if ($ret >> 8 == 0) {
-                               print STDERR "mr error: $dir should be deleted yet still exists\n\n";
-                               push @failed, $dir;
-                               return;
-                       }
-               }
-       }
+       $ENV{MR_CONFIG}=$configfiles{$topdir};
+       my $lib=exists $config{$topdir}{$subdir}{lib} ?
+                      $config{$topdir}{$subdir}{lib}."\n" : "";

 
        if ($action eq 'checkout') {
                if (-d $dir) {
                        print "mr $action: $dir already exists, skipping checkout\n" if $verbose;
 
        if ($action eq 'checkout') {
                if (-d $dir) {
                        print "mr $action: $dir already exists, skipping checkout\n" if $verbose;

-                       push @skipped, $dir;
-                       return;
+                       return SKIPPED;

                }
                }

+

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

+
+               if (! -d $dir) {
+                       print "mr $action: creating parent directory $dir\n" if $verbose;
+                       system("mkdir", "-p", $dir);
+               }

        }
        elsif ($action eq 'update') {
                if (! -d $dir) {
        }
        elsif ($action eq 'update') {
                if (! -d $dir) {


@@ -417,20 +501,29 @@ sub action { #{{{
                        "my_action(){ $config{$topdir}{$subdir}{skip}\n }; my_action '$action'";
                print "mr $action: running skip test >>$test<<\n" if $verbose;
                my $ret=system($test);
                        "my_action(){ $config{$topdir}{$subdir}{skip}\n }; my_action '$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 $verbose;
                if ($ret >> 8 == 0) {
                        print "mr $action: $dir skipped per config file\n" if $verbose;

-                       push @skipped, $dir;
-                       return;
+                       return SKIPPED;

                }
        }
        
        if (! $nochdir && ! chdir($dir)) {
                print STDERR "mr $action: failed to chdir to $dir: $!\n";
                }
        }
        
        if (! $nochdir && ! chdir($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";
        }
        elsif (! exists $config{$topdir}{$subdir}{$action}) {
                print STDERR "mr $action: no defined $action command for $topdir$subdir, skipping\n";

-               push @skipped, $dir;
+               return SKIPPED;

        }
        else {
                if (! $nochdir) {
        }
        else {
                if (! $nochdir) {


@@ -445,20 +538,118 @@ sub action { #{{{
                print STDERR "mr $action: running >>$command<<\n" if $verbose;
                my $ret=system($command);
                if ($ret != 0) {
                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;
                        print STDERR "mr $action: failed ($ret)\n" if $verbose;

-                       push @failed, $dir;

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

+                       return FAILED;

                }
                else {
                }
                else {

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

                }
                }

+       }
+} #}}}

 
 

-               print "\n";
+# run actions on multiple repos, in parallel
+sub mrs { #{{{
+       $| = 1;
+       my @active;
+       my @fhs;
+       my @out;
+       my $running=0;
+       while (@fhs or @repos) {
+               while ($running < $jobs && @repos) {
+                       $running++;
+                       my $repo = shift @repos;
+                       pipe(my $outfh, CHILD_STDOUT);
+                       pipe(my $errfh, CHILD_STDERR);
+                       unless (my $pid = fork) {
+                               die "cannot fork: $!" unless defined $pid;
+                               open(STDOUT, ">&CHILD_STDOUT") || die "reopen stdout: $!";
+                               open(STDERR, ">&CHILD_STDERR") || die "reopen stderr: $!";
+                               close CHILD_STDOUT;
+                               close CHILD_STDERR;
+                               close $outfh;
+                               close $errfh;
+                               exit action($action, @$repo);
+                       }
+                       close CHILD_STDOUT;
+                       close CHILD_STDERR;
+                       push @active, $repo;
+                       push @fhs, [$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]) {
+                                                       print STDOUT $out[$i][0];
+                                                       print STDERR $out[$i][1];
+                                                       print "\n";
+                                                       record($active[$i], $? >> 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, $dir;
+       }
+       elsif ($ret == FAILED) {
+               push @failed, $dir;
+       }
+       elsif ($ret == SKIPPED) {
+               push @skipped, $dir;
+       }
+       elsif ($ret == ABORT) {
+               exit 1;
+       }
+       else {
+               die "unknown exit status $ret";

        }
 } #}}}
 
        }
 } #}}}
 


@@ -471,21 +662,6 @@ sub showstat { #{{{
        }
        return;
 } #}}}
        }
        return;
 } #}}}

-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 (@failed) {
-       exit 1;
-}
-elsif (! @ok && @skipped) {
-       exit 1;
-}
-exit 0;

 
 my %loaded;
 sub loadconfig { #{{{
 
 my %loaded;
 sub loadconfig { #{{{


@@ -515,6 +691,10 @@ sub loadconfig { #{{{
                        $dir=".";
                }
                $dir=abs_path($dir)."/";
                        $dir=".";
                }
                $dir=abs_path($dir)."/";

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

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


@@ -577,9 +757,20 @@ sub loadconfig { #{{{
                                $knownactions{$parameter}=1;
                                if ($parameter eq 'chain' &&
                                    length $dir && $section ne "DEFAULT" &&
                                $knownactions{$parameter}=1;
                                if ($parameter eq 'chain' &&
                                    length $dir && $section ne "DEFAULT" &&

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

                                }
                        }
                }
                                }
                        }
                }


@@ -706,7 +897,7 @@ lib =
                exit 1
        }
        hours_since() {
                exit 1
        }
        hours_since() {

-               for dir in .git .svn .bzr CVS; do
+               for dir in .git .svn .bzr CVS .hg; do

                        if [ -e "$MR_REPO/$dir" ]; then
                                flagfile="$MR_REPO/$dir/.mr_last$1"
                                break
                        if [ -e "$MR_REPO/$dir" ]; then
                                flagfile="$MR_REPO/$dir/.mr_last$1"
                                break


@@ -723,11 +914,17 @@ update =
        if [ -d "$MR_REPO"/.svn ]; then
                svn update "$@"
        elif [ -d "$MR_REPO"/.git ]; then
        if [ -d "$MR_REPO"/.svn ]; then
                svn update "$@"
        elif [ -d "$MR_REPO"/.git ]; then

-               git pull origin master "$@"
+               if [ -z "$@" ]; then
+                       git pull -t origin master
+               else
+                       git pull "$@"
+               fi

        elif [ -d "$MR_REPO"/.bzr ]; then
                bzr merge "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs update "$@"
        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
        else
                error "unknown repo type"
        fi


@@ -740,6 +937,8 @@ status =
                bzr status "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs status "$@"
                bzr status "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs status "$@"

+       elif [ -d "$MR_REPO"/.hg ]; then
+               hg status "$@"

        else
                error "unknown repo type"
        fi
        else
                error "unknown repo type"
        fi


@@ -752,6 +951,8 @@ commit =
                bzr commit "$@" && bzr push
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs commit "$@"
                bzr commit "$@" && 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
        else
                error "unknown repo type"
        fi


@@ -764,6 +965,8 @@ diff =
                bzr diff "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs diff "$@"
                bzr diff "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs diff "$@"

+       elif [ -d "$MR_REPO"/.hg ]; then
+               hg diff "$@"

        else
                error "unknown repo type"
        fi
        else
                error "unknown repo type"
        fi


@@ -776,6 +979,8 @@ log =
                bzr log "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs log "$@"
                bzr log "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs log "$@"

+       elif [ -d "$MR_REPO"/.hg ]; then
+               hg log "$@"

        else
                error "unknown repo type"
        fi
        else
                error "unknown repo type"
        fi


@@ -789,22 +994,36 @@ register =
                if [ -z "$url" ]; then
                        error "cannot determine svn url"
                fi
                if [ -z "$url" ]; then
                        error "cannot determine svn url"
                fi

-               echo "Registering svn url: $url"
-               mr config "$(pwd)" checkout="svn co $url $basedir"
+               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"
                fi
        elif [ -d .git ]; then
                url=$(LANG=C git-config --get remote.origin.url)
                if [ -z "$url" ]; then
                        error "cannot determine git url"
                fi

-               echo "Registering git url: $url"
-               mr config "$(pwd)" checkout="git clone $url $basedir"
+               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
        elif [ -d .bzr ]; then
                url=$(cat .bzr/branch/parent)
                if [ -z "$url" ]; then
                        error "cannot determine bzr url"
                fi

-               echo "Registering bzr url: $url"
-               mr config "$(pwd)" checkout="bzr clone $url $basedir"
+               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"
        fi
        else
                error "unable to register this repo type"
        fi