--- /dev/null
+# Nick's web site: copybin filter. No-op filter binary that simply copies the
+# input to the output. This exists primarily to break symlinks in rules.
+#
+# Copyright © 2020 Nick Bowler
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+class CopyBinFilter < Nanoc::Filter
+ identifier :copybin
+ type :binary
+
+ require 'fileutils'
+
+ def run(filename, params = {})
+ FileUtils.cp(filename, output_filename)
+ end
+end