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|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Embedded Scala Script Evaluator
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; $Id$
;; Commands:
;; \begin{scalaprogram}{<name>} ... \end{scalaprogram}
;; begin a complete Scala program with given name
;; \beginscalaprogram{<name>} ... \endscalaprogram
;; begin a Scala program with given name, which can be omitted in
;; which case the program is anonymous
;; \scalaprogramoutput{<name>}
;; insert the output of the given program, which must be ended
;; \begin{scalacode} ... \end{scalacode}
;; begin a section of Scala code which is added to the current
;; program, and printed in the final result
;; \begin{scalainvisiblecode} ... \end{scalainvisiblecode}
;; like \begin{scalacode}, but the code doesn't get printed
;; TODO
;; - add interaction with siris using commands like:
;; \beginscalainteraction, \endscalainteraction, visible/invisible code,
;; visible code whose result is not visible
;; Diagnostics
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define fast? #f)
(define verbose? #t)
(define (message str . args)
(when verbose?
(apply format (error-output-port) str args)
(newline (error-output-port))))
(define (fail line-num msg . args)
(format #t "~a:~a: ~a" "<in-file>" line-num (apply format #f msg args)))
;; Syntax
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define-syntax when
(syntax-rules ()
((when cond body1 body2 ...)
(if cond (begin body1 body2 ...)))))
(define-syntax unless
(syntax-rules ()
((unless cond body1 body2 ...)
(if (not cond) (begin body1 body2 ...)))))
;; Temporary directories / files
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; AList associating temporary directories with program names.
(define temp-dirs '())
(define (get-temp-dir prog-name)
(cond ((assoc prog-name temp-dirs) => cdr)
(else
(let ((dir (temp-file-iterate (lambda (dir) (create-directory dir) dir)
"/tmp/temp-~a")))
(set! temp-dirs (alist-cons prog-name dir temp-dirs))
dir))))
(define (clean-temp-dirs)
(for-each (lambda (file/dir)
(let ((dir (cdr file/dir)))
(message "Cleaning up temporary class directory (~a)" dir)
(run (rm -rf ,dir))))
temp-dirs))
(define (scala-file-name prog-name)
(expand-file-name (replace-extension prog-name ".scala")
(get-temp-dir prog-name)))
(define (open-scala-program name)
(open-output-file (scala-file-name name)))
(define (close-scala-program name port)
(unless fast? (compile-scala-program name))
(close-output-port port))
;; Compiling and running Scala programs
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define (compile-scala-program prog-name)
(let ((file-name (scala-file-name prog-name))
(classes-dir (get-temp-dir prog-name)))
(message "Compiling file ~a to directory ~a" file-name classes-dir)
(run (scalac -d ,classes-dir ,file-name))))
(define (append-scala-program-output prog-name out-port)
(let ((classes-dir (get-temp-dir prog-name)))
(message "Running program ~a" prog-name)
(with-env (("CLASSPATH" . ,(string-append classes-dir ":" (getenv "CLASSPATH"))))
(write-string (run/string (scala ,prog-name)) out-port))))
;; Main iteration
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define (begin-scala-code port)
(format port "\\begin{lstlisting}\n"))
(define (end-scala-code port)
(format port "\\end{lstlisting}\n"))
(define (begin-program-output port)
(format port "\\begin{verbatim}\n"))
(define (end-program-output port)
(format port "\\end{verbatim}\n"))
(define (scala-rx contents)
(rx bos (* space) ,@contents (* space)))
(define (scala-begin-rx env-name)
(scala-rx (string-append "\\begin{" env-name "}")))
(define (scala-end-rx env-name)
(scala-rx (string-append "\\end{" env-name "}")))
(define scalatex
(let ((prog-name-rx (rx (* (| alphanum ("_"))))))
(lambda (in-port out-port)
(awk (read-line in-port) (line) line-num ((prog-name #f)
(prog-port #f)
(expr #f)
(in-fragment? #f)
(copy? #t))
;; Program.
((regexp-search (scala-rx (rx "\\beginscalaprogram"
"{" (submatch ,prog-name-rx) "}"))
line)
=> (lambda (match)
(let ((prog-name (or (match:substring match 1) "anonymous")))
(values prog-name
(open-scala-program prog-name)
#f
#f
copy?))))
((regexp-search (scala-rx "\\endscalaprogram") line)
(close-scala-program prog-name prog-port)
(values #f #f #f #f copy?))
((regexp-search (scala-rx (rx "\\begin{scalaprogram}"
"{" (submatch ,prog-name-rx) "}"))
line)
=> (lambda (match)
(begin-scala-code out-port)
(let ((prog-name (or (match:substring match 1) "anonymous")))
(values prog-name
(open-scala-program prog-name)
#f
#t
#t))))
((regexp-search (scala-end-rx "scalaprogram") line)
(end-scala-code out-port)
(close-scala-program prog-name prog-port)
(values #f #f #f #f copy?))
;; Insertion of program output.
((regexp-search (scala-rx (rx "\\scalaprogramoutput"
"{" (submatch ,prog-name-rx) "}"))
line)
=> (lambda (match)
(let ((prog-name (match:substring match 1)))
(begin-program-output out-port)
(if fast?
(format out-port "!!! NO OUTPUT !!!")
(append-scala-program-output prog-name out-port))
(end-program-output out-port))
(values prog-name prog-port #f in-fragment? copy?)))
;; Visible code fragment.
((regexp-search (scala-begin-rx "scalacode") line)
(begin-scala-code out-port)
(values prog-name prog-port #f #t #t))
((regexp-search (scala-end-rx "scalacode") line)
(end-scala-code out-port)
(values prog-name prog-port #f #f #t))
;; Invisible code fragment.
((regexp-search (scala-begin-rx "scalainvisiblecode") line)
(values prog-name prog-port #f #t #f))
((regexp-search (scala-end-rx "scalainvisiblecode") line)
(values prog-name prog-port #f #f #t))
(else
(when in-fragment?
(write-string line prog-port)
(newline prog-port))
(when copy?
(write-string line out-port)
(newline out-port))
(values prog-name
prog-port
(and expr (string-append expr line))
in-fragment?
copy?))))))
(define (display-usage-and-exit prog)
(format #t "Usage: ~a [--no-compile] <in-file> <out-file>\n" prog))
(define (main cmd-line)
(let ((prog (car cmd-line))
(args (cdr cmd-line)))
(if (>= 2 (length args))
(call-with-input-file (first args)
(lambda (in-port)
(call-with-output-file (second args)
(lambda (out-port)
(format out-port "%% DO NOT EDIT - AUTOMATICALLY GENERATED FILE\n")
(format out-port "%% Generated from \"~a\" on ~a by ~a\n\n"
(first args)
(format-date "~Y-~m-~d [~H:~M]" (date))
(user-login-name))
(scalatex in-port out-port)
(clean-temp-dirs)))))
(display-usage-and-exit prog))))
|
