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#docker で #ruby gem の redcarpet / reverse_markdown を使って 標準出入力から #Markdown #HTML 変換を行う例

Last updated at Posted at 2019-04-16

Dockerfile

FROM ruby

RUN gem install reverse_markdown redcarpet

Exe

docker build . -t ruby-gems
$ echo '<h1>hey</h1>' | docker run -i ruby-gems  reverse_markdown
# hey
$ echo "abc" | docker run -i ruby-gems redcarpet
<p>abc</p>

Maybe badcase

$ docker run ruby-gems /bin/bash -c "echo '<h1>head</h1>' | reverse_markdown"
# head
$ docker run ruby-gems /bin/bash -c "echo '# h1' | redcarpet"
<h1>h1</h1>

ref

| Docker Documentation

Original by Github issue

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