+sub clean_tree_check_git ($$$) {
+ my ($honour_ignores, $message, $ignmessage) = @_;
+ my @cmd = (@git, qw(clean -dn));
+ push @cmd, qw(-x) unless $honour_ignores;
+ my $leftovers = cmdoutput @cmd;
+ if (length $leftovers) {
+ print STDERR $leftovers, "\n" or confess $!;
+ $message .= $ignmessage if $honour_ignores;
+ fail $message;
+ }
+}
+
+sub clean_tree_check_git_wd ($) {
+ my ($message) = @_;
+ return if $cleanmode =~ m{no-check};
+ return if $patches_applied_dirtily; # yuk
+ clean_tree_check_git +($cleanmode !~ m{all-check}),
+ $message, "\n".__ <<END;
+If this is just missing .gitignore entries, use a different clean
+mode, eg --clean=dpkg-source,no-check (-wdn/-wddn) to ignore them
+or --clean=git (-wg/-wgf) to use \`git clean' instead.
+END
+}
+
+sub clean_tree_check () {
+ # This function needs to not care about modified but tracked files.
+ # That was done by check_not_dirty, and by now we may have run
+ # the rules clean target which might modify tracked files (!)
+ if ($cleanmode =~ m{^check}) {
+ clean_tree_check_git +($cleanmode =~ m{ignores}), __
+ "tree contains uncommitted files and --clean=check specified", '';
+ } elsif ($cleanmode =~ m{^dpkg-source}) {
+ clean_tree_check_git_wd __
+ "tree contains uncommitted files (NB dgit didn't run rules clean)";
+ } elsif ($cleanmode =~ m{^git}) {
+ clean_tree_check_git 1, __
+ "tree contains uncommited, untracked, unignored files\n".
+ "You can use --clean=git[-ff],always (-wga/-wgfa) to delete them.", '';
+ } elsif ($cleanmode eq 'none') {
+ } else {
+ confess "$cleanmode ?";
+ }
+}