Init

lib/shellcmd.rb

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+require 'open3'
+
+# This nanoc filter is a general purpose filter that simply pipes
+# the contents of an item into a given shell command, and sets
+# the items output to the output of it.
+#
+# It is NOT safe to use on large inputs, which will cause I/O
+# deadlocks. Any safer implementation is encouraged.
+#
+# Usage:
+#
+# compile '/static/js/*/' do
+# # minify JS :)
+# filter :shellcmd, "java -jar js-compiler.jar"
+# end
+#
+# Written by Vincent Driessen (http://twitter.com/nvie) and
+# released to the public domain.
+#
+# http://nvie.com
+class ShellCmdFilter < Nanoc3::Filter
+  identifier :shellcmd
+
+  def run(content, params)
+    Open3.popen3(params[:cmd]) do |stdin, stdout, stderr|
+      stdin.write(content)
+      stdin.close
+      stdout.read
+    end
+  end
+end