Make AUCTeX compile each \include to a separate file

Question

In LaTeX it is customary to put the content of different chapters into different files which are then pulled into a master file using \include{FILENAME} statements. One can then use the \includeonly{SPEC} command to compile only those chapters which are specified by SPEC.

The TeX.SO question Typeset single chapter from book shows how to do this. Here comes my question:

Is it possible to tell AUCTeX to parse through the master file and compile each of the \include'd files to its own pdf file?

Say I have this:

\documentclass{book}

\begin{document}
\include{Chap1}
\include{Chap2}
\include{Chap3}
\end{document}

in a file called Master.tex. The function I'm looking for would then compile Chap1 to Master_Chap1.pdf, Chap2 to Master_Chap2.pdf and so on [By using \includeonly I'd assume].

Answer 1

EDIT: Totally didn't read all the comments on the answer. Looks like the subfiles LaTeX package might be a cleaner way. Leaving this here because options.

There is not a built-in way to do this. After a bit of elisp hacking, I came up with this solution:

(defun TeX-compile-all-chapters-from-master (cmd prefix)
  "Compile chapters using `CMD' with prefix `PREFIX'.

Each \include{foo} will be processed by running `CMD' formatted with args `PREFIX', `NAME' (foo in this example) and `TMP-FILE-NAME'."
  (let ((text (buffer-string)))
    (save-excursion
      (goto-char 0)
      (while (search-forward-regexp "\\(include\\){\\(.+\\)}" (buffer-size) t)
        (let* ((name (match-string 2))
               (tmp-file-name (concat "/tmp/tex-compile-all-" name))
               (incl-end (match-end 1)))
          (with-temp-file tmp-file-name
            (insert text)
            (goto-char incl-end)
            (insert "only"))
          (TeX-run-compile nil (format cmd prefix name tmp-file-name) nil)
          (delete-file tmp-file-name))))))

Example usage:

(TeX-compile-all-chapters-from-master "pdflatex -jobname %s_%s %s" "Master")

To bind this to a key, use define-key and either a lambda containing the above or apply-partially. Note to ELispers: Fairly sure my code isn't idiomatic in several areas ((insert text), tmp file name generation). Please help.