Embed a script language

[at15]

Since Ayi should allow a lot of user configuration, such as generator, having a supported script language is a good idea.

A list could be found here https://github.com/golang/go/wiki/Projects#virtual-machines-and-languages

• https://github.com/avelino/awesome-go#embeddable-scripting-languages
• https://github.com/robertkrimen/otto js engine in golang
• https://github.com/mattn/anko still developing
• https://github.com/PuerkitoBio/agora last dev 2013

[at15]

• https://github.com/robertkrimen/otto is preferred because it has easy API like Get and Set for the vm, and string handling is the major part.

[at15]

And instead of adding a script lanage language, using template could also be a good idea, like what ansible did.

[at15]

also after I saw https://github.com/ivotron/aver I found https://github.com/pointlander/peg

In computer science, a parsing expression grammar, or PEG, is a type of analytic formal grammar, i.e. it describes a formal language in terms of a set of rules for recognizing strings in the language.