releasing version 0.15

[code/myrepos.git] / mr

diff --git a/mr b/mr
index 2187aa06b59472cc9c13dfe5367bdd9b4ef59b45..8cfe01365a9994895430e2dbe714eb2b4cdb00b0 100755 (executable)
--- a/mr
+++ b/mr
@@ -152,16 +152,24 @@ Be verbose.
 Expand the statistics line displayed at the end to include information
 about exactly which repositories failed and were skipped, if any.
 
 Expand the statistics line displayed at the end to include information
 about exactly which repositories failed and were skipped, if any.
 

-=item -n
+=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 yeild
+a good speedup in updates without loading the machine too much.

 
 =back
 
 
 =back
 


@@ -232,7 +240,7 @@ 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.
 
 (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 = test `whoami` != joey

   skip = [ "$1" = update ] && ! hours_since "$1" 12
 
 =item order
   skip = [ "$1" = update ] && ! hours_since "$1" 12
 
 =item order


@@ -296,7 +304,8 @@ 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";
+
+# things that can happen when mr runs a command

 use constant {
        OK => 0,
        FAILED => 1,
 use constant {
        OK => 0,
        FAILED => 1,


@@ -304,90 +313,33 @@ use constant {
        ABORT => 3,
 };
 
        ABORT => 3,
 };
 

-$SIG{INT}=sub {
-       print STDERR "mr: interrupted\n";
-       exit 2;
-};
-
-$ENV{MR_CONFIG}="$ENV{HOME}/.mrconfig";
+# configurables

 my $config_overridden=0;
 my $verbose=0;
 my $stats=0;
 my $config_overridden=0;
 my $verbose=0;
 my $stats=0;

-my $no_recurse=0;
+my $max_depth;

 my $no_chdir=0;
 my $jobs=1;
 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 %config;
 my %configfiles;
 my %knownactions;
 my %alias;

-my $directory=getcwd();

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

-getopts();
-
-# This can happen if it's run in a directory that was removed
-# or other strangeness.
-if (! defined $directory) {
-       die("mr: failed to determine working directory\n");
-}
-# Make sure MR_CONFIG is an absolute path, but don't use abs_path since
-# the config file might be a symlink to elsewhere, and the directory it's
-# in is significant.
-if ($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 $action=expandaction(shift @ARGV);
-dispatch($action);
-showstats($action);
-
-if (@failed) {
-       exit 1;
-}
-elsif (! @ok && @skipped) {
-       exit 1;
-}
-else {
-       exit 0;
-}
-
-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);
-       }
-
-       if ($jobs > 1) {
-               mrs($action, selectrepos());
-       }
-       else {
-               foreach my $repo (selectrepos()) {
-                       record($repo, action($action, @$repo));
-               }
-       }
-} #}}}
+main();

 
 

+my %rcs;

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

+       if (exists $rcs{$dir}) {
+               return $rcs{$dir};
+       }
+

        my $test="set -e\n";
        foreach my $rcs_test (
                        sort {
        my $test="set -e\n";
        foreach my $rcs_test (
                        sort {


@@ -405,21 +357,30 @@ sub rcs_test { #{{{
        print "mr $action: running rcs test >>$test<<\n" if $verbose;
        my $rcs=`$test`;
        chomp $rcs;
        print "mr $action: running rcs test >>$test<<\n" if $verbose;
        my $rcs=`$test`;
        chomp $rcs;

-       if (! length $rcs) {
+       if ($rcs=~/\n/s) {
+               $rcs=~s/\n/, /g;
+               print STDERR "mr $action: found multiple possible repository types ($rcs) for $topdir$subdir\n";

                return undef;
        }
                return undef;
        }

+       if (! length $rcs) {
+               return $rcs{$dir}=undef;
+       }

        else {
        else {

-               return $rcs;
+               return $rcs{$dir}=$rcs;

        }
 } #}}}
        
 sub findcommand { #{{{
        }
 } #}}}
        
 sub findcommand { #{{{

-       my ($action, $dir, $topdir, $subdir) = @_;
+       my ($action, $dir, $topdir, $subdir, $is_checkout) = @_;

        
        if (exists $config{$topdir}{$subdir}{$action}) {
                return $config{$topdir}{$subdir}{$action};
        }
 
        
        if (exists $config{$topdir}{$subdir}{$action}) {
                return $config{$topdir}{$subdir}{$action};
        }
 

+       if ($is_checkout) {
+               return undef;
+       }
+

        my $rcs=rcs_test(@_);
 
        if (defined $rcs && 
        my $rcs=rcs_test(@_);
 
        if (defined $rcs && 


@@ -437,19 +398,15 @@ sub action { #{{{
        $ENV{MR_CONFIG}=$configfiles{$topdir};
        my $lib=exists $config{$topdir}{$subdir}{lib} ?
                       $config{$topdir}{$subdir}{lib}."\n" : "";
        $ENV{MR_CONFIG}=$configfiles{$topdir};
        my $lib=exists $config{$topdir}{$subdir}{lib} ?
                       $config{$topdir}{$subdir}{lib}."\n" : "";

+       my $is_checkout=($action eq 'checkout');

 
 

-       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: $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 =~ /update/) {
                if (! -d $dir) {
        }
        elsif ($action =~ /update/) {
                if (! -d $dir) {


@@ -459,8 +416,8 @@ sub action { #{{{
 
        $ENV{MR_REPO}=$dir;
 
 
        $ENV{MR_REPO}=$dir;
 

-       my $skiptest=findcommand("skip", $dir, $topdir, $subdir);
-       my $command=findcommand($action, $dir, $topdir, $subdir);
+       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.
 
        if (defined $skiptest) {
                my $test="set -e;".$lib.


@@ -482,7 +439,12 @@ sub action { #{{{
                        return SKIPPED;
                }
        }
                        return SKIPPED;
                }
        }

-       
+
+       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;
        if (! $no_chdir && ! chdir($dir)) {
                print STDERR "mr $action: failed to chdir to $dir: $!\n";
                return FAILED;


@@ -494,7 +456,7 @@ sub action { #{{{
                        return FAILED;
                }
                else {
                        return FAILED;
                }
                else {

-                       print STDERR "mr $action: no defined $action command for $rcs repository $topdir$subdir, skipping\n";
+                       print STDERR "mr $action: no defined action for $rcs repository $topdir$subdir, skipping\n";

                        return SKIPPED;
                }
        }
                        return SKIPPED;
                }
        }


@@ -552,7 +514,7 @@ sub mrs { #{{{
        my @out;
        my $running=0;
        while (@fhs or @repos) {
        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);
                        $running++;
                        my $repo = shift @repos;
                        pipe(my $outfh, CHILD_STDOUT);


@@ -635,6 +597,7 @@ sub record { #{{{
 } #}}}
 
 sub showstats { #{{{
 } #}}}
 
 sub showstats { #{{{

+       my $action=shift;

        if (! @ok && ! @failed && ! @skipped) {
                die "mr $action: no repositories found to work on\n";
        }
        if (! @ok && ! @failed && ! @skipped) {
                die "mr $action: no repositories found to work on\n";
        }


@@ -696,8 +659,13 @@ sub selectrepos { #{{{
                my $d=$directory;
                $dir.="/" unless $dir=~/\/$/;
                $d.="/" unless $d=~/\/$/;
                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/;
                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, $subdir];
        }
        if (! @repos) {
                push @repos, [$dir, $topdir, $subdir];
        }
        if (! @repos) {


@@ -830,11 +798,11 @@ sub loadconfig { #{{{
                                        my $ret=system($value);
                                        if ($ret != 0) {
                                                if (($? & 127) == 2) {
                                        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 ($? & 127) {
                                                        exit 2;
                                                }
                                                elsif ($? & 127) {

-                                                       print STDERR "mr $action: chain test received signal ".($? & 127)."\n";
+                                                       print STDERR "mr: chain test received signal ".($? & 127)."\n";

                                                }
                                        }
                                        else {
                                                }
                                        }
                                        else {


@@ -949,9 +917,33 @@ sub modifyconfig { #{{{
        print $out @out;
        close $out;     
 } #}}}
        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);
+       }
+
+       if (!$jobs || $jobs > 1) {
+               mrs($action, selectrepos());
+       }
+       else {
+               foreach my $repo (selectrepos()) {
+                       record($repo, action($action, @$repo));
+               }
+       }
+} #}}}
+

 sub help { #{{{
 sub help { #{{{

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

 } #}}}
        
 sub config { #{{{
 } #}}}
        
 sub config { #{{{


@@ -984,7 +976,7 @@ sub config { #{{{
                                }
                        }
                        if (! $found) {
                                }
                        }
                        if (! $found) {

-                               die "mr $action: $section $_ not set\n";
+                               die "mr config: $section $_ not set\n";

                        }
                }
        }
                        }
                }
        }


@@ -997,33 +989,38 @@ sub register { #{{{
                # Find the closest known mrconfig file to the current
                # directory.
                $directory.="/" unless $directory=~/\/$/;
                # 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;
                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;
                        }
                }
                                last;
                        }
                }

+               if (! $foundconfig) {
+                       $directory=""; # no config file, use builtin
+               }

        }
        if (@ARGV) {
                my $subdir=shift @ARGV;
                if (! chdir($subdir)) {
        }
        if (@ARGV) {
                my $subdir=shift @ARGV;
                if (! chdir($subdir)) {

-                       print STDERR "mr $action: failed to chdir to $subdir: $!\n";
+                       print STDERR "mr register: failed to chdir to $subdir: $!\n";

                }
        }
 
        $ENV{MR_REPO}=getcwd();
                }
        }
 
        $ENV{MR_REPO}=getcwd();

-       my $command=findcommand("register", $ENV{MR_REPO}, $directory, 'DEFAULT');
+       my $command=findcommand("register", $ENV{MR_REPO}, $directory, 'DEFAULT', 0);

        if (! defined $command) {
        if (! defined $command) {

-               die "mr $action: unknown repository type\n";
+               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);
        }
 
        $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 $verbose;
+       print "mr register: running >>$command<<\n" if $verbose;

        exec($command) || die "exec: $!";
 } #}}}
 
        exec($command) || die "exec: $!";
 } #}}}
 


@@ -1052,14 +1049,14 @@ sub expandaction { #{{{
 } #}}}
 
 sub getopts { #{{{
 } #}}}
 
 sub getopts { #{{{

-       Getopt::Long::Configure("no_permute");
+       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 },
                "v|verbose" => \$verbose,
                "s|stats" => \$stats,
        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,
+               "n|no-recurse:i" => \$max_depth,
+               "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".


@@ -1067,6 +1064,52 @@ sub getopts { #{{{
        }
 } #}}}
 
        }
 } #}}}
 

+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{{{
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
 #DATA{{{


@@ -1102,7 +1145,7 @@ lib =
                if [ -z "$flagfile" ]; then
                        error "cannot determine flag filename"
                fi
                if [ -z "$flagfile" ]; then
                        error "cannot determine flag filename"
                fi

-               delta=$(perl -wle 'print -f shift() ? int((-M _) * 24) : 9999' "$flagfile")
+               delta=`perl -wle 'print -f shift() ? int((-M _) * 24) : 9999' "$flagfile"`

                if [ "$delta" -lt "$2" ]; then
                        exit 0
                else
                if [ "$delta" -lt "$2" ]; then
                        exit 0
                else


@@ -1120,7 +1163,7 @@ 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 "$MR_REPO"/config &&
 git_bare_test =
        test -d "$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
+       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
 
 svn_update = svn update "$@"
 git_update = if [ "$@" ]; then git pull "$@"; else git pull -t origin master; fi


@@ -1159,44 +1202,44 @@ darcs_log = darcs changes "$@"
 git_bare_log = git log "$@"
 
 svn_register =
 git_bare_log = git log "$@"
 
 svn_register =

-       url=$(LANG=C svn info . | grep -i ^URL: | cut -d ' ' -f 2)
+       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 '$url' '$MR_REPO'"
 git_register = 
        if [ -z "$url" ]; then
                error "cannot determine svn url"
        fi
        echo "Registering svn url: $url in $MR_CONFIG"
        mr -c "$MR_CONFIG" config "`pwd`" checkout="svn co '$url' '$MR_REPO'"
 git_register = 

-       url="$(LANG=C git-config --get remote.origin.url)" || true
+       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 =
        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)
+       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 =
        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)
+       repo=`cat CVS/Repository`
+       root=`cat CVS/Root`

        if [ -z "$root" ]; then
                error "cannot determine cvs root"
                fi
        echo "Registering cvs repository $repo at root $root"
        mr -c "$MR_CONFIG" config "`pwd`" checkout="cvs -d '$root' co -d '$MR_REPO' '$repo'"
 hg_register = 
        if [ -z "$root" ]; then
                error "cannot determine cvs root"
                fi
        echo "Registering cvs repository $repo at root $root"
        mr -c "$MR_CONFIG" config "`pwd`" checkout="cvs -d '$root' co -d '$MR_REPO' '$repo'"
 hg_register = 

-       url=$(hg showconfig paths.default)
+       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 = 
        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)
+       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 = 
        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
+       url="`LANG=C GIT_CONFIG=config git config --get remote.origin.url`" || true

        if [ -z "$url" ]; then
                error "cannot determine git url"
        fi
        if [ -z "$url" ]; then
                error "cannot determine git url"
        fi