strip images, compress them a bit

commands/images.rb

@@ -0,0 +1,19 @@
+usage       'images'
+summary     'prepares images'
+description 'Prepares images for uploads, i.e. strips them of metadata, compresses them and so on.'
+
+module Nanoc::CLI::Commands
+  class Images < ::Nanoc::CLI::CommandRunner
+    def run
+      img_dir = "content/pigs"
+
+      # strip exif
+      system "exiftool -all= -overwrite_original #{img_dir}/*.{jpg,png}"
+
+      # compress png
+      system "optipng #{img_dir}/*.png"
+    end
+  end
+end
+
+runner Nanoc::CLI::Commands::Images