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Allow option bundling, mostly so "-j2" will work.
[code/myrepos.git] / mr
diff --git a/mr b/mr
index 606ea5d2dfac9e105a3e38625367269e0158e1c0..9501322e7a6d04004266f4a21bdc64136dc2dfc2 100755 (executable)
--- 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
@@ -283,7 +296,8 @@ 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,
@@ -291,243 +305,42 @@ 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 $verbose=0;
 my $stats=0;
 my $no_recurse=0;
+my $no_chdir=0;
 my $jobs=1;
+my $directory=getcwd();
+
+# globals :-(
 my %config;
 my %configfiles;
 my %knownactions;
 my %alias;
-my $directory=getcwd();
-
-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");
-
-}
-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);
-
-# 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 \"$action\" (known actions: ".
-                       join(", ", sort keys %knownactions).")\n";
-       }
-       else {
-               die "mr: ambiguous action \"$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 $section=shift;
-       if ($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 $_ not set\n";
-                       }
-               }
-       }
-       modifyconfig($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;
-                       }
-               }
-       }
-       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},
-               };
-       }
-}
-@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;
-               }
-       }
-       $nochdir=1;
-}
-
-# run the action on each repository and print stats
 my (@ok, @failed, @skipped);
-if ($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";
-       }
-       if (@failed) {
-               print STDERR "mr $action: (failed: ".join(" ", @failed).")\n";
-       }
-}
-if (@failed) {
-       exit 1;
-}
-elsif (! @ok && @skipped) {
-       exit 1;
-}
-exit 0;
+
+main();
 
 sub rcs_test { #{{{
        my ($action, $dir, $topdir, $subdir) = @_;
 
        my $test="set -e\n";
-       foreach my $rcs_test (grep { /_test/ } keys %{$config{$topdir}{$subdir}}) {
+       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(){ $config{$topdir}{$subdir}{$rcs_test}\n }\n".$test;
+               $test="my_$rcs_test() {\n$config{$topdir}{$subdir}{$rcs_test}\n}\n".$test;
                $test.="if my_$rcs_test; then echo $rcs; fi\n";
        }
        $test=$config{$topdir}{$subdir}{lib}."\n".$test
                if exists $config{$topdir}{$subdir}{lib};
        
        print "mr $action: running rcs test >>$test<<\n" if $verbose;
-       $ENV{MR_REPO}=$dir;
-       $ENV{MR_CONFIG}=$configfiles{$topdir};
        my $rcs=`$test`;
        chomp $rcs;
        if (! length $rcs) {
@@ -540,6 +353,10 @@ sub rcs_test { #{{{
        
 sub findcommand { #{{{
        my ($action, $dir, $topdir, $subdir) = @_;
+       
+       if (exists $config{$topdir}{$subdir}{$action}) {
+               return $config{$topdir}{$subdir}{$action};
+       }
 
        my $rcs=rcs_test(@_);
 
@@ -547,9 +364,6 @@ sub findcommand { #{{{
            exists $config{$topdir}{$subdir}{$rcs."_".$action}) {
                return $config{$topdir}{$subdir}{$rcs."_".$action};
        }
-       elsif (exists $config{$topdir}{$subdir}{$action}) {
-               return $config{$topdir}{$subdir}{$action};
-       }
        else {
                return undef;
        }
@@ -607,7 +421,7 @@ sub action { #{{{
                }
        }
        
-       if (! $nochdir && ! chdir($dir)) {
+       if (! $no_chdir && ! chdir($dir)) {
                print STDERR "mr $action: failed to chdir to $dir: $!\n";
                return FAILED;
        }
@@ -623,7 +437,7 @@ sub action { #{{{
                }
        }
        else {
-               if (! $nochdir) {
+               if (! $no_chdir) {
                        print "mr $action: $topdir$subdir\n";
                }
                else {
@@ -634,7 +448,7 @@ sub 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) {
@@ -667,6 +481,9 @@ sub action { #{{{
 
 # run actions on multiple repos, in parallel
 sub mrs { #{{{
+       my $action=shift;
+       my @repos=@_;
+
        $| = 1;
        my @active;
        my @fhs;
@@ -755,6 +572,26 @@ sub record { #{{{
        }
 } #}}}
 
+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";
+       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;
@@ -765,6 +602,64 @@ 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;
@@ -839,6 +734,12 @@ 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";
                        }
@@ -856,18 +757,23 @@ 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 {
@@ -983,6 +889,200 @@ sub modifyconfig { #{{{
        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 ($jobs > 1) {
+               mrs($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 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');
+       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 getopts { #{{{
+       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,
+               "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");
+       }
+} #}}}
+
+sub init { #{{{
+       $SIG{INT}=sub {
+               print STDERR "mr: interrupted\n";
+               exit 2;
+       };
+       
+       $ENV{MR_CONFIG}="$ENV{HOME}/.mrconfig";
+
+       # 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($action);
+
+       if (@failed) {
+               exit 1;
+       }
+       elsif (! @ok && @skipped) {
+               exit 1;
+       }
+       else {
+               exit 0;
+       }
+} #}}}
+
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
 #DATA{{{
@@ -995,7 +1095,6 @@ ls = list
 [DEFAULT]
 order = 10
 lib =
-       PWD="$pwd"
        error() {
                echo "mr: $@" >&2
                exit 1
@@ -1027,25 +1126,6 @@ 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
-       }
 
 svn_test = test -d "$MR_REPO"/.svn
 git_test = test -d "$MR_REPO"/.git
@@ -1053,17 +1133,13 @@ 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 "$@"
-git_update = 
-       # all this is because of a bug in git-fetch, which requires GIT_DIR set
-       local git_dir_override; git_dir_override=.git
-       case "$(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"
+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 "$@" && hg update "$@"
@@ -1077,24 +1153,14 @@ hg_status  = hg status "$@"
 darcs_status = darcs whatsnew -ls "$@"
 
 svn_commit = svn commit "$@"
-git_commit = 
-       case "$(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
+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 "$@"
-git_diff = 
-       case "$(get_git_repo_type "$MR_REPO")" in
-               bare) error "cannot diff in bare git repositories";;
-               fake-bare) error "diff does not work for fake bare git repositories (yet).";;
-       esac
-       git diff "$@"
+git_diff = git diff "$@"
 bzr_diff = bzr diff "$@"
 cvs_diff = cvs diff "$@"
 hg_diff  = hg diff "$@"
@@ -1106,91 +1172,52 @@ bzr_log = bzr log "$@"
 cvs_log = cvs log "$@"
 hg_log  = hg log "$@"
 darcs_log = darcs changes "$@"
+git_bare_log = git log "$@"
 
 svn_register =
-       if [ -n "$1" ]; then
-               cd "$1"
-       fi
-       basedir="${PWD##*/}"
        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 $basedir"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="svn co '$url' '$MR_REPO'"
 git_register = 
-       if [ -n "$1" ]; then
-               cd "$1"
-       fi
-       basedir="${PWD##*/}"
-       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)"
+       url="$(LANG=C git config --get remote.origin.url)" || true
        if [ -z "$url" ]; then
                error "cannot determine git url"
        fi
-       case "$repo_type" in
-               bare|fake-bare)
-                       # this seems like a bare repo as it has no
-                       # worktree.
-                       local work_tree
-                       work_tree="$(git-config --get core.worktree)" || :
-                       if [ ! -d "$work_tree" ]; then
-                               error "git worktree $work_tree does not exist"
-                       fi
-                       suffix=" (with worktree $work_tree)"
-                       mr -c "$MR_CONFIG" config "$PWD" \
-                               lib="GIT_WORK_TREE=$work_tree; export GIT_WORK_TREE"
-                       ;;
-       esac
-       echo "Registering git url: $url in $MR_CONFIG${suffix:-}"
-       mr -c "$MR_CONFIG" config "$PWD" checkout="git clone $url $basedir"
+       echo "Registering git url: $url in $MR_CONFIG"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="git clone '$url' '$MR_REPO'"
 bzr_register =
-       if [ -n "$1" ]; then
-               cd "$1"
-       fi
-       basedir="${PWD##*/}"
        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 $basedir"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="bzr clone '$url' '$MR_REPO'"
 cvs_register =
-       if [ -n "$1" ]; then
-               cd "$1"
-       fi
-       basedir="${PWD##*/}"
        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 $repo"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="cvs -d '$root' co -d '$MR_REPO' '$repo'"
 hg_register = 
-       if [ -n "$1" ]; then
-               cd "$1"
-       fi
-       basedir="${PWD##*/}"
        url=$(hg showconfig paths.default)
        echo "Registering mercurial repo url: $url in $MR_CONFIG"
-       mr -c "$MR_CONFIG" config "$PWD" \
-               checkout="hg clone $url $basedir"
+       mr -c "$MR_CONFIG" config "`pwd`" checkout="hg clone '$url' '$MR_REPO'"
 darcs_register = 
-       if [ -n "$1" ]; then
-               cd "$1"
-       fi
-       basedir="${PWD##*/}"
        url=$(cat _darcs/prefs/defaultrepo)
        echo "Registering darcs repository $url in $MR_CONFIG"
-       mr -c "$MR_CONFIG" config "$PWD" \
-               checkout="darcs get $url $basedir"
+       mr -c "$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