scsh-make/macros.scm

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;;; TODO:
;;;
;;; macros -> functions, eg.
;;;
;;; (define make-is-out-of-date!
;;; (lambda (t . p)
;;; (lambda args (cons #t (last args)))))
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(define-syntax make
(syntax-rules ()
((make ?rule-trans-set (?target-fname0 ...) ?init-state)
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;;
;; ?rule-trans-set or ?target-fname0 could be an expr: eval only once
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;;
(let ((rule-trans-set (known-rules-update ?rule-trans-set)))
(let* ((target-fname0 ?target-fname0)
(target-rule (known-rules-get rule-trans-set target-fname0)))
(if (not (null? (rule-trans-set-rule-candidates rule-trans-set)))
(display "rule-candidates not empty.\n"))
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(if target-rule
(rule-make target-rule
?init-state
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(rule-trans-set-rule-set rule-trans-set))
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(error "target-rule not found in rule-set.")))
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...))
((_ )
(error "usage: (make '#{:rule-trans-set} (target0 ...) init-state)\n"))))
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;;; (define-syntax makefile
;;; (syntax-rules ()
;;; ((makefile ?rule0 ...)
;;; (let ((rule-trans-set (make-empty-rule-trans-set)))
;;; (let* ((rule-trans-set (?rule0 rule-trans-set))
;;; ...)
;;; rule-trans-set)))))
(define-syntax makefile
(syntax-rules ()
((makefile) (make-empty-rule-trans-set))
((makefile ?rule0 ?rule1 ...)
(?rule0 (makefile ?rule1 ...)))))
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(define-syntax makefile-rule
(syntax-rules ()
((makefile-rule ?target (?prereq0 ...) ?thunk)
(makefile-rule-tmpvars () ?target (?prereq0 ...) ?thunk))))
(define-syntax makefile-rule-tmpvars
(syntax-rules ()
((makefile-rule-tmpvars (tmp1 ...) ?target () ?thunk)
;;
;; ?target could be an expr: eval only once
;;
(let ((target ?target))
(lambda (rule-trans-set)
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(rule-trans-set-add rule-trans-set
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target
(list tmp1 ...)
(make-is-out-of-date? target tmp1 ...)
(lambda ?args (?thunk))))))
;;
;; recursively construct temporary, hygienic variables
;;
((makefile-rule-tmpvars (tmp1 ...) ?target (?prereq0 ?prereq1 ...) ?thunk)
(let ((tmp2 ?prereq0))
(makefile-rule-tmpvars (tmp1 ... tmp2) ?target (?prereq1 ...) ?thunk)))))
(define-syntax makefile-rule-md5
(syntax-rules ()
((makefile-rule-md5 ?fingerprint ?target (?prereq0 ...) ?thunk)
(makefile-rule-md5-tmpvars () ?fingerprint ?target (?prereq0 ...) ?thunk))))
(define-syntax makefile-rule-md5-tmpvars
(syntax-rules ()
((makefile-rule-md5-tmpvars (tmp1 ...) ?fingerprint ?target () ?thunk)
;;
;; ?target could be an expr: eval only once
;;
(let ((target ?target))
(lambda (rule-trans-set)
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(rule-trans-set-add rule-trans-set
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target
(list tmp1 ...)
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(make-has-md5-digest=? ?fingerprint
target
tmp1 ...)
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(lambda ?args (?thunk))))))
;;
;; recursively construct temporary, hygienic variables
;;
((makefile-rule-md5-tmpvars (tmp1 ...) ?fingerprint ?target
(?prereq0 ?prereq1 ...) ?thunk)
(let ((tmp2 ?prereq0))
(makefile-rule-md5-tmpvars (tmp1 ... tmp2) ?fingerprint
?target (?prereq1 ...) ?thunk)))))
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(define-syntax make-is-out-of-date?
(syntax-rules ()
((make-is-out-of-date? ?target)
(lambda ?args
(cons (file-not-exists? ?target) ?args)))
((make-is-out-of-date? ?target ?prereq0 ...)
(lambda ?args
(cons (and (file-exists? ?prereq0) ...
(or (file-not-exists? ?target)
(> (file-last-mod ?prereq0)
(file-last-mod ?target)))
...)
(last ?args))))))
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(define-syntax make-is-out-of-date!
(syntax-rules ()
((make-is-out-of-date? ?target ?prereq0 ...)
(lambda ?args
(cons #t (last ?args))))))
(define-syntax make-has-md5-digest=?
(syntax-rules ()
((make-has-md5-digest=? ?fingerprint ?target)
(lambda ?args
(cons (or (file-not-exists? ?target)
(=? (md5-digest-for-port (open-input-file ?target))
?fingerprint))
?args)))
((make-has-md5-digest=? ?fingerprint ?target ?prereq0 ...)
(lambda ?args
(cons (or (file-not-exists? ?target)
(=? (md5-digest->number (md5-digest-for-port
(open-input-file ?target)))
(md5-digest->number ?fingerprint)))
(last ?args))))))