install

$ gem install review
$ git clone https://github.com/kmuto/review.git
$ review-init hello
$ cd hello

pdfを出力しようとするとエラーになりました。

$ rake pdf
review-pdfmaker config.yml
compiling hello.tex
W, [2018-07-09T22:44:18.946295 #6812]  WARN -- : hello.re:1: headline is empty.
/Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/lib/review/pdfmaker.rb:39:in `system_or_raise': failed to run command: ebb cover.jpg (RuntimeError)
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/lib/review/pdfmaker.rb:272:in `block in copy_images'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/lib/review/pdfmaker.rb:264:in `chdir'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/lib/review/pdfmaker.rb:264:in `copy_images'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/lib/review/pdfmaker.rb:233:in `generate_pdf'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/lib/review/pdfmaker.rb:131:in `execute'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/lib/review/pdfmaker.rb:81:in `execute'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/review-2.5.0/bin/review-pdfmaker:16:in `<top (required)>'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/bin/review-pdfmaker:23:in `load'
    from /Users/satoutakeshi/.rbenv/versions/2.1.8/bin/review-pdfmaker:23:in `<main>'
rake aborted!
Command failed with status (1): [review-pdfmaker config.yml...]
lib/tasks/review.rake:71:in `block in <top (required)>'
Tasks: TOP => pdf => book.pdf
(See full trace by running task with --trace)

エラーの原因はこちら

failed to run command: ebb cover.jpg

ebbというコマンドが実行されないとのこと。Texを入れないといけません。

ということでTexをインストールします。

3.2Gもあるので気長にダウンロードを待ちます。

~/.bash_profileファイルにtexコマンドのパスを通します

~/.bash_profile

$ echo export PATH=$PATH:/Library/Tex/texbin >> ~/.bash_profile
$ source  ~/.bash_profile

これでOKです。
もう一度$ rake pdfをするとPDFが出力されるはずです。