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-j bugfixes
[code/myrepos.git] / mr
diff --git a/mr b/mr
index 4630f06898eb23fcdbd49dde3cc78ffeaf70863e..1b66d82f484995a92786d328ba14e1013a8f784f 100755 (executable)
--- a/mr
+++ b/mr
@@ -28,11 +28,11 @@ 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 repositories at or below your
 working directory. Or, if you are in a subdirectory of a repository that
@@ -108,6 +108,10 @@ To show the command that mr uses to update the repository in src/foo:
 
   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.
 
@@ -153,6 +157,14 @@ about exactly which repositories failed and were skipped, if any.
 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.
+
+Note that in -j mode, all output of the jobs goes to standard output, even
+output that would normally go to standard error.
+
 =back
 
 =head1 FILES
@@ -251,6 +263,13 @@ use warnings;
 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";
@@ -263,6 +282,7 @@ my $directory=getcwd();
 my $verbose=0;
 my $stats=0;
 my $no_recurse=0;
+my $jobs=1;
 my %config;
 my %configfiles;
 my %knownactions;
@@ -275,6 +295,7 @@ my $result=GetOptions(
        "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".
@@ -288,17 +309,17 @@ if (! $result || @ARGV < 1) {
 if ($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);
 
-eval {
-       use FindBin qw($Bin $Script);
-       $ENV{MR_PATH}=$Bin."/".$Script;
-};
-
 # alias expansion and command stemming
 my $action=shift @ARGV;
 if (exists $alias{$action}) {
@@ -414,10 +435,39 @@ if (! @repos) {
        $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));
+       }
+}
+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, $subdir) = @_;
@@ -429,15 +479,14 @@ sub action { #{{{
        if ($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/;
 
                if (! -d $dir) {
                        print "mr $action: creating parent directory $dir\n" if $verbose;
-                       my $ret=system("mkdir", "-p", $dir);
+                       system("mkdir", "-p", $dir);
                }
        }
        elsif ($action eq 'update') {
@@ -456,27 +505,26 @@ sub action { #{{{
                if ($ret != 0) {
                        if (($? & 127) == 2) {
                                print STDERR "mr $action: interrupted\n";
-                               exit 2;
+                               return ABORT;
                        }
                        elsif ($? & 127) {
                                print STDERR "mr $action: skip test received signal ".($? & 127)."\n";
-                               exit 1;
+                               return ABORT;
                        }
                }
                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";
-               push @failed, $dir;
+               return FAILED;
        }
        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 (! $nochdir) {
@@ -490,34 +538,105 @@ sub action { #{{{
                        join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
                print STDERR "mr $action: running >>$command<<\n" if $verbose;
                my $ret=system($command);
+               print "\n";
                if ($ret != 0) {
                        if (($? & 127) == 2) {
                                print STDERR "mr $action: interrupted\n";
-                               exit 2;
+                               return ABORT;
                        }
                        elsif ($? & 127) {
                                print STDERR "mr $action: received signal ".($? & 127)."\n";
+                               return ABORT;
                        }
                        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";
                        }
+                       return FAILED;
                }
                else {
                        if ($action eq 'checkout' && ! -d $dir) {
                                print STDERR "mr $action: $dir missing after checkout\n";;
-                               push @failed, $dir;
-                               return;
+                               return FAILED;
                        }
 
-                       push @ok, $dir;
+                       return OK;
+               }
+       }
+} #}}}
+
+# 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;
+                       my $pid = open(my $fh, "-|");
+                       if (! $pid) {
+                               open(STDERR, ">&STDOUT");
+                               exit action($action, @$repo);
+                       }
+                       push @active, $repo;
+                       push @fhs, $fh;
+                       push @out, "";
+               }
+               my ($rin, $rout) = ('','', '');
+               my $nfound;
+               foreach my $x (@fhs) {
+                       next unless defined $x;
+                       vec($rin, fileno($x), 1) = 1;
                }
+               $nfound = select($rout=$rin, undef, undef, 1);
+               foreach my $i (0..$#fhs) {
+                       my $fh = $fhs[$i];
+                       next unless defined $fh;
+                       if (vec($rout, fileno($fh), 1) == 1) {
+                               my $r = '';
+                               if (sysread($fh, $r, 1024) == 0) {
+                                       close($fh);
+                                       record($active[$i], $? >> 8);
+                                       $fhs[$i] = undef;
+                                       $running--;
+                                       print $out[$i];
+                                       $out[$i]='';
+                               }
+                               $out[$i] .= $r;
+                       }
+               }
+               while (@fhs and !defined $fhs[0]) {
+                       shift @active;
+                       shift @fhs;
+                       shift @out;
+               }
+       }
+} #}}}
 
-               print "\n";
+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";
        }
 } #}}}
 
@@ -530,29 +649,6 @@ sub showstat { #{{{
        }
        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 ($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;
 
 my %loaded;
 sub loadconfig { #{{{
@@ -788,7 +884,7 @@ lib =
                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$1"
                                break
@@ -805,11 +901,17 @@ update =
        if [ -d "$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"/.hg ]; then
+               hg pull "$@" && hg update "$@"
        else
                error "unknown repo type"
        fi
@@ -822,6 +924,8 @@ status =
                bzr status "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs status "$@"
+       elif [ -d "$MR_REPO"/.hg ]; then
+               hg status "$@"
        else
                error "unknown repo type"
        fi
@@ -834,6 +938,8 @@ commit =
                bzr commit "$@" && 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
@@ -846,6 +952,8 @@ diff =
                bzr diff "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs diff "$@"
+       elif [ -d "$MR_REPO"/.hg ]; then
+               hg diff "$@"
        else
                error "unknown repo type"
        fi
@@ -858,6 +966,8 @@ log =
                bzr log "$@"
        elif [ -d "$MR_REPO"/CVS ]; then
                cvs log "$@"
+       elif [ -d "$MR_REPO"/.hg ]; then
+               hg log "$@"
        else
                error "unknown repo type"
        fi
@@ -896,6 +1006,11 @@ register =
                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