From ffb40f2f354954634cdd554071e60ef3650b3010 Mon Sep 17 00:00:00 2001
From: Paul Wise <pabs@debian.org>
Date: Sun, 9 Jun 2013 15:36:37 +0800
Subject: [PATCH] Add a minimal output mode that shows output when appropriate.
 Closes: #694031

---
 mr | 47 +++++++++++++++++++++++++++++------------------
 1 file changed, 29 insertions(+), 18 deletions(-)

diff --git a/mr b/mr
index 9bcc1ea..87acef3 100755
--- a/mr
+++ b/mr
@@ -265,6 +265,13 @@ configuration.
 
 Be verbose.
 
+=item -m
+
+=item --minimal
+
+Minimise output. If a command fails or there is any output then the usual
+output will be shown.
+
 =item -q
 
 =item --quiet
@@ -568,6 +575,7 @@ use constant {
 # configurables
 my $config_overridden=0;
 my $verbose=0;
+my $minimal=0;
 my $quiet=0;
 my $stats=0;
 my $force=0;
@@ -726,6 +734,7 @@ sub terminal_friendly_spawn {
 	my $actionmsg = shift;
 	my $sh = shift;
 	my $quiet = shift;
+	my $minimal = shift;
 	my $output = "";
 	if ($terminal) {
 		my $pty = IO::Pty::Easy->new;
@@ -742,11 +751,11 @@ sub terminal_friendly_spawn {
 	if ($quiet && $ret != 0) {
 		print "$actionmsg\n" if $actionmsg;
 		print STDERR $output;
-	} elsif (!$quiet) {
+	} elsif (!$quiet && (!$minimal || $output)) {
 		print "$actionmsg\n" if $actionmsg;
 		print $output;
 	}
-	return $ret;
+	return ($ret, $output ? 1 : 0);
 }
 
 sub action {
@@ -828,7 +837,7 @@ sub action {
 			return FAILED;
 		}
 		else {
-			print STDERR "mr $action: no defined action for $vcs repository $fulldir, skipping\n";
+			print STDERR "mr $action: no defined action for $vcs repository $fulldir, skipping\n" unless $minimal;
 			return SKIPPED;
 		}
 	}
@@ -842,16 +851,16 @@ sub action {
 			$s=~s/^\Q$fulldir\E\/?//;
 			$actionmsg="mr $action: $fulldir (in subdir $s)";
 		}
-		print "$actionmsg\n" unless $quiet;
+		print "$actionmsg\n" unless $quiet || $minimal;
 
 		my $hookret=hook("pre_$action", $topdir, $subdir);
 		return $hookret if $hookret != OK;
 
-		my $ret=runsh $action, $topdir, $subdir,
+		my ($ret, $out)=runsh $action, $topdir, $subdir,
 			$command, \@ARGV, sub {
 				my $sh=shift;
-				if (!$jobs || $jobs > 1 || $quiet) {
-					return terminal_friendly_spawn($actionmsg, $sh, $quiet);
+				if (!$jobs || $jobs > 1 || $quiet || $minimal) {
+					return terminal_friendly_spawn($actionmsg, $sh, $quiet, $minimal);
 				}
 				else {
 					system($sh);
@@ -889,7 +898,7 @@ sub action {
 				return FAILED;
 			}
 
-			my $ret=hook("post_$action", $topdir, $subdir);
+			my ($ret, $hook_out)=hook("post_$action", $topdir, $subdir);
 			return $ret if $ret != OK;
 			
 			if ($is_checkout || $is_update) {
@@ -903,7 +912,7 @@ sub action {
 				return $ret if $ret != OK;
 			}
 			
-			return OK;
+			return (OK, $out || $hook_out);
 		}
 	}
 }
@@ -913,10 +922,10 @@ sub hook {
 
 	my $command=$config{$topdir}{$subdir}{$hook};
 	return OK unless defined $command;
-	my $ret=runsh $hook, $topdir, $subdir, $command, [], sub {
+	my ($ret,$out)=runsh $hook, $topdir, $subdir, $command, [], sub {
 			my $sh=shift;
-			if (!$jobs || $jobs > 1 || $quiet) {
-				return terminal_friendly_spawn(undef, $sh, $quiet);
+			if (!$jobs || $jobs > 1 || $quiet || $minimal) {
+				return terminal_friendly_spawn(undef, $sh, $quiet, $minimal);
 			}
 			else {
 				system($sh);
@@ -936,7 +945,7 @@ sub hook {
 		}
 	}
 
-	return OK;
+	return (OK, $out);
 }
 
 # run actions on multiple repos, in parallel
@@ -964,7 +973,7 @@ sub mrs {
 				close CHILD_STDERR;
 				close $outfh;
 				close $errfh;
-				exit action($action, @$repo);
+				exit +(action($action, @$repo))[0];
 			}
 			close CHILD_STDOUT;
 			close CHILD_STDERR;
@@ -995,7 +1004,7 @@ sub mrs {
 						    	waitpid($active[$i][0], 0);
 							print STDOUT $out[$i][0];
 							print STDERR $out[$i][1];
-							record($active[$i][1], $? >> 8);
+							record($active[$i][1], $? >> 8, $out[$i][0] || $out[$i][1]);
 						    	splice(@fhs, $i, 1);
 						    	splice(@active, $i, 1);
 						    	splice(@out, $i, 1);
@@ -1012,10 +1021,11 @@ sub mrs {
 sub record {
 	my $dir=shift()->[0];
 	my $ret=shift;
+	my $out=shift;
 
 	if ($ret == OK) {
 		push @ok, $dir;
-		print "\n" unless $quiet;
+		print "\n" unless $quiet || ($minimal && !$out);
 	}
 	elsif ($ret == FAILED) {
 		if ($interactive) {
@@ -1046,10 +1056,10 @@ sub showstats {
 		showstat($#ok+1, "ok", "ok"),
 		showstat($#failed+1, "failed", "failed"),
 		showstat($#skipped+1, "skipped", "skipped"),
-	).")\n" unless $quiet;
+	).")\n" unless $quiet || $minimal;
 	if ($stats) {
 		if (@skipped) {
-			print "mr $action: (skipped: ".join(" ", @skipped).")\n" unless $quiet;
+			print "mr $action: (skipped: ".join(" ", @skipped).")\n" unless $quiet || $minimal;
 		}
 		if (@failed) {
 			print STDERR "mr $action: (failed: ".join(" ", @failed).")\n";
@@ -1841,6 +1851,7 @@ sub getopts {
 		"p|path" => sub { }, # now default, ignore
 		"f|force" => \$force,
 		"v|verbose" => \$verbose,
+		"m|minimal" => \$minimal,
 		"q|quiet" => \$quiet,
 		"s|stats" => \$stats,
 		"k|insecure" => \$insecure,
-- 
2.39.2