Apply patch to configure.pl to fix incompatibility with Data::Dumper>2.182

Dockerfile

@@ -14,6 +14,8 @@ ENV RSYNC_BPC_VERSION="${RSYNC_BPC_VERSION}"
 RUN apk --no-cache --update add \
         rsync tar bash shadow ca-certificates \
         supervisor \
+        # TODO: Remove patch when appliance of datadumper.path is not needed anymore
+        patch \
         perl perl-archive-zip perl-xml-rss perl-cgi perl-file-listing perl-json-xs \
         expat samba-client iputils openssh openssl rrdtool ttf-dejavu \
         msmtp lighttpd lighttpd-mod_auth apache2-utils tzdata libstdc++ libgomp \
@@ -50,6 +52,8 @@ COPY files/auth.conf /etc/lighttpd/auth.conf
 COPY files/auth-ldap.conf /etc/lighttpd/auth-ldap.conf
 COPY files/entrypoint.sh /entrypoint.sh
 COPY files/supervisord.conf /etc/supervisord.conf
+# TODO: Remove when this patch is not applied anymore in entrypoint.sh
+COPY files/datadumper.patch /datadumper.patch
 
 EXPOSE 8080
 

files/datadumper.patch

@@ -0,0 +1,35 @@
+diff --git a/configure.pl b/configure.pl
+index 6826ebc..d5deef5 100755
+--- a/configure.pl
++++ b/configure.pl
+@@ -668,7 +668,7 @@ if ( defined($Conf{CgiUserConfigEdit}) ) {
+           if ( defined($Conf{CgiUserConfigEdit}{$p}) );
+     }
+     $Conf{CgiUserConfigEdit} = $new;
+-    my $d = Data::Dumper->new([$new], [*value]);
++    my $d = Data::Dumper->new([$new]);
+     $d->Indent(1);
+     $d->Terse(1);
+     $d->Sortkeys(1);
+diff --git a/lib/BackupPC/Storage/Text.pm b/lib/BackupPC/Storage/Text.pm
+index e9df664..09fcb24 100644
+--- a/lib/BackupPC/Storage/Text.pm
++++ b/lib/BackupPC/Storage/Text.pm
+@@ -422,7 +422,7 @@ sub ConfigFileMerge
+                 my $var = $1;
+                 $skipExpr = "\$fakeVar = $2\n";
+                 if ( exists($newConf->{$var}) ) {
+-                    my $d = Data::Dumper->new([$newConf->{$var}], [*value]);
++                    my $d = Data::Dumper->new([$newConf->{$var}]);
+                     $d->Indent(1);
+                     $d->Terse(1);
+                     $d->Sortkeys(1);
+@@ -454,7 +454,7 @@ sub ConfigFileMerge
+     #
+     foreach my $var ( sort(keys(%$newConf)) ) {
+         next if ( $done->{$var} );
+-        my $d = Data::Dumper->new([$newConf->{$var}], [*value]);
++        my $d = Data::Dumper->new([$newConf->{$var}]);
+         $d->Indent(1);
+         $d->Terse(1);
+         $d->Sortkeys(1);

files/entrypoint.sh

@@ -43,6 +43,10 @@ if [ -f /firstrun ]; then
 	tar xf "BackupPC-$BACKUPPC_VERSION.tar.gz"
 	cd "/root/BackupPC-$BACKUPPC_VERSION"
 
+	# Fix BackupPC code to make it run with Data::Dumper >= 2.182.
+	# TODO: Remove this patch once https://github.com/backuppc/backuppc/issues/466 has been merged in a new BackupPC release.
+	patch -p1 < /datadumper.patch && rm -f /datadumper.patch
+
 	# Configure WEB UI access
 	configure_admin=""
 	if [ ! -f /etc/backuppc/htpasswd ]; then