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-rw-r--r--guides/Rakefile6
1 files changed, 6 insertions, 0 deletions
diff --git a/guides/Rakefile b/guides/Rakefile
index 7881a3d9b3..d6dd950d01 100644
--- a/guides/Rakefile
+++ b/guides/Rakefile
@@ -13,6 +13,12 @@ namespace :guides do
desc "Generate .mobi file. The kindlegen executable must be in your PATH. You can get it for free from http://www.amazon.com/kindlepublishing"
task :kindle do
+ unless `kindlerb -v 2> /dev/null` =~ /kindlerb 0.1.1/
+ abort "Please `gem install kindlerb`"
+ end
+ unless `convert` =~ /convert/
+ abort "Please install ImageMagick`"
+ end
ENV['KINDLE'] = '1'
Rake::Task['guides:generate:html'].invoke
end