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#!@theme_d_guile@ \
-e main -s
!#
;; A script to compute Theme-D module dependencies.
;; Copyright (C) 2025 Tommi Höynälänmaa
;; Distributed under GNU LGPL.
(use-modules (rnrs lists)
(rnrs io ports)
(th-scheme-utilities stdutils)
(th-scheme-utilities singleton))
(import (only (rnrs base) assert))
(import (srfi srfi-1))
(define (process-module? sx l-s-lib)
(or
(and (symbol? sx) (null? l-s-lib))
(and (list? sx)
(not-null? sx)
(equal? (drop-right sx 1) l-s-lib))))
(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)
(map (lambda (mn) (if (symbol? mn) (list mn) mn))
(apply append
(map (lambda (sx) (process-toplevel-expression sx l-s-lib)) l-sx))))
(define (is-module-name? x)
(or (symbol? x)
(and (list? x)
(not-null? x)
(if (for-all symbol? x) #t #f))))
(define (get-name mn)
(assert (is-module-name? mn))
(cond
((symbol? mn) mn)
((and (list? mn) (not-null? mn)) (last mn))
(else (raise 'internal-error))))
(define (get-imports mn s-unit-type l-s-lib)
(assert (is-module-name? mn))
(assert (and (list? l-s-lib) (for-all symbol? l-s-lib)))
(let* ((s-name
(if (symbol? mn) mn (last mn)))
(str-ext
(case s-unit-type
((interface) "thi")
((body) "thb")
((proper-program) "thp")
((script) "ths")
(else (raise 'internal-error-with-extensions))))
(str-filename
(string-append (symbol->string s-name) "." str-ext))
(ip (open-input-file str-filename))
(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-interface
define-body
define-proper-program
define-script)))
(process-all-expressions (cddar l-sx) l-s-lib)
(begin
(display "Unrecognized translation unit syntax.\n"
(standard-error-port))
(exit 1)))))
(define (collect-module-names sgt-module-names mn-cur s-unit-type l-s-lib)
(assert (singleton? sgt-module-names))
(assert (is-module-name? mn-cur))
(assert (symbol? s-unit-type))
(assert (and (list? l-s-lib) (for-all symbol? l-s-lib)))
(let ((l-mn (singleton-get-element sgt-module-names))
(load
(lambda (mn)
(collect-module-names
sgt-module-names mn 'body l-s-lib))))
(if (and (not (member mn-cur l-mn))
(process-module? mn-cur l-s-lib))
(begin
(if (eq? s-unit-type 'body)
(begin
(singleton-set-element! sgt-module-names (cons mn-cur l-mn))
(for-each
load
(get-imports mn-cur 'interface l-s-lib))))
(for-each
load
(get-imports mn-cur s-unit-type l-s-lib))))))
(define (collect-toplevel-module-names mn-target l-sx s-unit-type l-s-lib)
(if (not (is-module-name? mn-target))
(begin
(display "Syntax error in the source module.\n"
(standard-error-port))
(exit 1)))
(if (eq? s-unit-type 'interface)
(process-all-expressions (cddar l-sx) l-s-lib)
(let* ((l-imports (process-all-expressions (cddar l-sx) l-s-lib))
(sgt-module-names (make-singleton '())))
(if (eq? s-unit-type 'body)
(collect-module-names sgt-module-names mn-target 'interface l-s-lib))
(for-each
(lambda (mn) (collect-module-names sgt-module-names mn 'body l-s-lib))
l-imports)
(delete-duplicates
(append l-imports (singleton-get-element sgt-module-names))))))
(define (get-intf-name str-name)
(string-append "__intf_" str-name))
(define (get-impl-name str-name)
(string-append "__impl_" str-name))
(define (print-output-deps str-name str-ext l-sx-deps)
(cond
((string=? str-ext "tci")
(display (string-append (get-intf-name str-name) ".go :")))
((string=? str-ext "tcb")
(display (string-append (get-impl-name str-name) ".go :")))
(else
(display (string-append str-name ".go :"))))
;; A module body depends on its interface.
(if (string=? str-ext "tcb")
(begin
(display " \\\n ")
(display (string-append str-name ".tcb"))
(display " \\\n ")
(display (string-append (get-intf-name str-name) ".go"))))
(for-each
(lambda (l-s-dep)
(if (is-module-name? l-s-dep)
(let ((str-name (symbol->string (get-name l-s-dep))))
(display " \\\n ")
(display
(string-append
(get-intf-name str-name)
".go"))
(display " \\\n ")
(display
(string-append
str-name
".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 (process-toplevel-expression2 sx l-s-lib)
(if (and (list? sx) (not-null? sx)
(equal? (car sx) 'prelink-body))
(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-expressions2 l-sx l-s-lib)
(apply append
(map (lambda (sx) (process-toplevel-expression2 sx l-s-lib)) l-sx)))
(define (print-output-deps2 str-name l-sx-deps)
(display (string-append (get-impl-name str-name) ".go :"))
(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 ")
(display
(string-append
(get-impl-name (symbol->string (last l-s-dep)))
".go")))
(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)
(if (eqv? (length args) 3)
(let* ((str-source (cadr args))
(str-lib (caddr args))
(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-interface
define-body
define-proper-program
define-script)))
(begin
(let* ((str-ext
(case (caar l-sx)
((define-interface) "tci")
((define-body) "tcb")
((define-proper-program) "tcp")
((define-script) "tcs")
(else
(display "Internal error.\n" (standard-error-port))
(exit 1))))
(s-unit-type
(case (caar l-sx)
((define-interface) 'interface)
((define-body) 'body)
((define-proper-program) 'proper-program)
((define-script) 'script)
(else
(display "Internal error.\n" (standard-error-port))
(exit 1))))
(mn-target (cadar l-sx))
(l-deps
(collect-toplevel-module-names
mn-target l-sx s-unit-type l-s-lib)))
(print-output-deps str-name str-ext l-deps)
(if (string=? str-ext "tcb")
(let ((l-deps2 (process-all-expressions2 (cddar l-sx) l-s-lib)))
(if (not (null? l-deps2))
(print-output-deps2 str-name l-deps2))))
(exit 0)))
(begin
(display "Unrecognized translation unit syntax.\n"
(standard-error-port))
(exit 1))))
(begin
(display "Invalid number of arguments.\n" (standard-error-port))
(exit 1))))
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