+} #}}}
+
+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");
+ }
+} #}}}