I want to use a code block to execute other code blocks with a given language. For example, in my document I want to validate every HTML block using the W3 validator. Currently I do it as follows.
First a code block to validate.
#+name: mininal-html-5
#+begin_src html
<!DOCTYPE html>
<title>Minimal HTML 5</title>
<p>Is it valid at all?</p>
#+end_src
Next a shell script that validates, getting it's input as a variable. Here together with the result
#+name: validate
#+begin_src shell :results output code :wrap src json :var content=mininal-html-5[]
http --form --multipart --ignore-stdin POST https://validator.w3.org/nu/ out='json' content=${content} | jq
#+end_src
#+RESULTS: validate
#+begin_src json
{
"messages": [
{
"type": "info",
"lastLine": 3,
"firstLine": 1,
"lastColumn": 7,
"firstColumn": 16,
"subType": "warning",
"message": "Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.",
"extract": "TYPE html>\n\n<title>Hello?",
"hiliteStart": 10,
"hiliteLength": 9
}
],
"source": {
"type": "text/html",
"encoding": "utf-8",
"code": "<!DOCTYPE html>\n\n<title>Hello?</title>\n\n<p>Is it valid at all?</p>"
}
}
#+end_src
The I can reuse it to validate another HTML block:
#+name: html-with-root
#+begin_src html
<!DOCTYPE html>
<html lang="en">
<title>Rooted HTML 5</title>
<p>Is it more valid?</p>
</html>
#+end_src
#+call: validate(content=html-with-root[])
#+RESULTS:
#+begin_src json
{
"messages": [],
"source": {
"type": "text/html",
"encoding": "utf-8",
"code": "<!DOCTYPE html>\n<html lang=\"en\">\n <title>Rooted HTML 5</title>\n\n <p>Is it more valid?</p>\n</html>"
}
}
#+end_src
It's quite good, but every time I need to give each block a unique name and then call the validator, referring to that name with square brackets. What I would really like, is to just evaluate the HTML code block and get the validation as a result. I think the way is to do something like:
(defun org-babel-execute:html (body params)
"Validate given HTML using W3C Validator"
(some-magic-function validate body))
The closest to "some-magic-function" I found so far is the org-sbe macro, but it's designed for table formulas, and in any case I couldn't get it to work.
