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#!@theme_d_guile@ \
-e main -s
!#
;; A script to compute Theme-D program dependencies.
;; Copyright (C) 2025 Tommi Höynälänmaa
;; Distributed under GNU LGPL.
(use-modules (srfi srfi-1)
(rnrs lists)
(rnrs io ports)
(th-scheme-utilities stdutils)
(th-scheme-utilities singleton)
(th-scheme-utilities hrecord)
(th-scheme-utilities parse-command-line))
(define (process-toplevel-expression sx l-s-lib)
(if (and (list? sx) (not-null? sx)
(memq (car sx) '(import import-and-reexport use)))
(filter (lambda (sx-module)
(and (list? sx-module)
(not-null? sx-module)
(equal? (drop-right sx-module 1) l-s-lib)))
(cdr sx))
'()))
(define (process-all-expressions l-sx l-s-lib)
(apply append
(map (lambda (sx) (process-toplevel-expression sx l-s-lib)) l-sx)))
(define (add-unit sgt-l l-s-unit)
(let ((l-old (singleton-get-element sgt-l)))
(if (not (member l-s-unit l-old))
(singleton-set-element! sgt-l (cons l-s-unit l-old)))))
(define (get-source-code-suffix unit-type)
(case unit-type
((proper-program) ".thp")
((script) ".ths")
((interface) ".thi")
((body) ".thb")
(else (raise 'invalid-unit-type))))
(define (get-unit-filename l-s-unit s-unit-type)
(string-append (symbol->string (last l-s-unit))
(get-source-code-suffix s-unit-type)))
(define (process-unit l-s-unit l-s-lib s-unit-type sgt-result sgt-interfaces sgt-bodies)
(if (and (eq? s-unit-type 'interface)
(member l-s-unit (singleton-get-element sgt-interfaces)))
#f
(if (and (eq? s-unit-type 'body)
(member l-s-unit (singleton-get-element sgt-bodies)))
#f
(begin
(if (eq? s-unit-type 'interface)
(begin
(add-unit sgt-result l-s-unit)
(add-unit sgt-interfaces l-s-unit)))
(if (eq? s-unit-type 'body)
(begin
(add-unit sgt-result l-s-unit)
(add-unit sgt-bodies l-s-unit)))
(let* ((str-unit-filename (get-unit-filename l-s-unit s-unit-type))
(ip (open-input-file str-unit-filename))
(l-sx-contents (read-file ip)))
(close-input-port ip)
(let ((l-submodules
(process-all-expressions (cddar l-sx-contents) l-s-lib)))
(for-each
(lambda (l-s-module)
(process-unit l-s-module l-s-lib 'interface
sgt-result sgt-interfaces sgt-bodies)
(process-unit l-s-module l-s-lib 'body
sgt-result sgt-interfaces sgt-bodies))
l-submodules)))))))
(define (print-output-deps str-name s-unit-type l-s-unit l-sx-deps module?)
(display (string-append str-name ".go :"))
(if (eq? s-unit-type 'script)
(begin
(display " \\\n ")
(display (string-append (symbol->string (last l-s-unit)) ".tcs")))
(begin
(display " \\\n ")
(display (string-append (symbol->string (last l-s-unit)) ".tcp"))))
(for-each
(lambda (l-s-dep)
(if (and (list? l-s-dep) (not-null? l-s-dep) (for-all symbol? l-s-dep))
(begin
(display " \\\n ")
(if module?
(display (string-append "__impl_" (symbol->string (last l-s-dep)) ".go"))
(display (string-append (symbol->string (last l-s-dep)) ".tcb"))))
(begin
(display "warning: invalid module " (standard-error-port))
(display l-s-dep (standard-error-port))
(newline (standard-error-port)))))
l-sx-deps)
(newline)
(newline))
(define (get-filename-without-ext filename)
(let ((index (string-index filename #\.)))
(if (eq? index #f)
filename
(string-take filename index))))
(define (parse-library str-lib)
(map string->symbol (split-string str-lib #\space)))
(define (main args)
(let* ((str-source "")
(str-lib "")
(module? #f))
(let* ((argd1
(make-hrecord <argument-descriptor> "module" #f
(lambda ()
(set! module? #t))))
(handle-proper-args
(lambda (l-proper-args)
(if (eqv? (length l-proper-args) 2)
(begin
(set! str-source (car l-proper-args))
(set! str-lib (cadr l-proper-args)))
(begin
(display "Missing arguments.\n" (standard-error-port))
(exit 1)))))
(l-args-without-cmd (cdr args)))
(parse-command-line l-args-without-cmd (list argd1) handle-proper-args)
(let* ((l-s-lib (parse-library str-lib))
(str-name (get-filename-without-ext str-source))
(ip (open-input-file str-source))
(l-sx (read-file ip)))
(close-input-port ip)
(if (and (list? l-sx)
(eqv? (length l-sx) 1)
(list? (car l-sx))
(>= (length (car l-sx)) 2)
(memq (caar l-sx)
'(define-proper-program define-script)))
(let* ((sgt-result (make-singleton '()))
(sgt-interfaces (make-singleton '()))
(sgt-bodies (make-singleton '()))
(l-s-unit (cadar l-sx))
(s-unit-type
(if (eq? (caar l-sx) 'define-proper-program)
'proper-program
'script)))
(if (and (list? l-s-unit)
(not-null? l-s-unit)
(for-all symbol? l-s-unit))
(begin
(process-unit l-s-unit l-s-lib s-unit-type
sgt-result sgt-interfaces sgt-bodies)
(print-output-deps str-name s-unit-type l-s-unit
(singleton-get-element sgt-result)
module?)
(exit 0))
(begin
(display "Invalid unit name.\n"
(standard-error-port))
(exit 1))))
(begin
(display "Unrecognized translation unit syntax.\n"
(standard-error-port))
(exit 1)))))))
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