Constructing a serialised YAML string in Ruby
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Sometimes you want to convert a YAML document to an encoded format that can then i.e. be base64-encoded, or stored in another form.
I fought against this the other day and it took me a bit of work to work out that we can write the following CLI Ruby incantation to give us what we need:
ruby -ryaml -e 'p YAML.load(ARGF.read).to_yaml' < a.yml # outputs: # "---\ninfo:\n version: 1.2.3\n"