210 lines
6.5 KiB
Scheme
210 lines
6.5 KiB
Scheme
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;;; TODO:
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;;;
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;;; (update-md-sum ...) is (due to history) not very lucky
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;;;
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(define digest-files (list "checksums.md5"
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"fingerprints.md5"
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"digests.md5"))
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(define digest-extensions (list ".md5" ".fp" ".digest"))
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(define (make-rule-build-func target prereqs thunk)
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(lambda args
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(cons (begin
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(display ";;; rule : ")
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(display target)
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(newline)
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(thunk))
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(last args))))
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(define (make-md5-build-func target prereqs thunk)
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(lambda args
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(cons (begin
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(display ";;; md5 : ")
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(display target)
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(newline)
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(thunk))
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(last args))))
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(define (make-always-build-func target prereqs thunk)
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(lambda args
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(cons (begin
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(display ";;; always : ")
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(display target)
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(newline)
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(thunk))
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(last args))))
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(define (make-once-build-func target prereqs thunk)
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(lambda args
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(cons (begin
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(display ";;; once : ")
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(display target)
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(newline)
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(thunk))
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(last args))))
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(define (make-is-out-of-date! target . prereqs)
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;; init-state is the last arg
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;; pass it untouched to the result
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(lambda args (cons #t (last args))))
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(define (make-once target . prereqs)
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;; init-state is the last arg
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;; pass it untouched to the result
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(lambda args (cons (file-not-exists? target) (last args))))
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(define (make-is-out-of-date? target . prereqs)
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(lambda args
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(let ((init-state (last args)))
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(cons (or (file-not-exists? target)
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(and (not (null? prereqs))
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(let for-each-prereq ((prereq (car prereqs))
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(todo (cdr prereqs)))
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(and (file-exists? prereq)
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(> (file-last-mod prereq)
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(file-last-mod target))
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(or (null? todo)
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(for-each-prereq (car todo) (cdr todo)))))))
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init-state))))
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(define (make-md5-sum-changed? target . prereqs)
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(lambda args
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(let ((init-state (last args))
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(tfname (expand-file-name target (cwd))))
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(cons (or (file-not-exists? tfname)
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(or (null? prereqs)
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(let for-each-prereq ((prereq (car prereqs))
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(todo (cdr prereqs)))
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(let ((pname (expand-file-name prereq (cwd))))
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(or (and (file-exists? pname)
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(> (file-last-mod pname)
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(file-last-mod tfname))
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(checksum-changed? pname)
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(or (md5-sum-update pname) #t))
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(and (not (null? todo))
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(for-each-prereq (car todo) (cdr todo))))))))
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init-state))))
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(define (check-files-target+extensions target checksum)
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(map (lambda (digest-file)
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(lambda ()
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(let ((dfile (expand-file-name digest-file (cwd))))
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(or (file-not-exists? dfile)
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(let ((strls (port->string-list (open-input-file dfile))))
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(= checksum
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(string->number (if (null? strls) "" (car strls)))))))))
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(map (lambda (ext)
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(string-append target ext))
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digest-extensions)))
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(define (update-files-target+extensions target checksum)
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(map (lambda (digest-file)
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(lambda ()
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(let ((dfile (expand-file-name digest-file (cwd))))
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(and (file-exists? dfile)
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(let ((outport (open-output-file dfile)))
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(display ";;; update : ") (display target) (newline)
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(with-current-output-port
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outport
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(lambda ()
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(display (number->string checksum)) (newline)))
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(close outport)
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#t)))))
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(map (lambda (ext)
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(string-append target ext))
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digest-extensions)))
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(define (digest-file->string-list digest-fname)
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(let* ((inport (open-input-file (expand-file-name digest-fname (cwd))))
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(strls (map (lambda (str)
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(let ((ls (string-tokenize str)))
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(if (not (null? ls))
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(let ((fp (car ls))
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(name (cadr ls)))
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(cons name fp))
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'())))
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(port->string-list inport))))
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(close inport)
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strls))
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(define (check-digest-files target checksum)
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(map (lambda (digest-file)
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(lambda ()
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(let ((dfile (expand-file-name digest-file (cwd)))
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(tname (file-name-nondirectory target)))
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(or (file-not-exists? dfile)
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(let* ((*fname-md5* (digest-file->string-list dfile))
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(maybe-md5 (if (or (null? *fname-md5*)
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(null? (car *fname-md5*)))
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#f
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(assoc tname *fname-md5*))))
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(or (not maybe-md5)
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(= checksum
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(string->number (cdr maybe-md5)))))))))
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digest-files))
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(define (string-list->digest-file dfname strls)
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(let ((outport (open-output-file (expand-file-name dfname (cwd))))
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(names (if (or (null? strls) (null? (car strls))) '() (map car strls)))
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(sums (if (or (null? strls) (null? (car strls))) '() (map cdr strls))))
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(display ";;; update : ") (display dfname) (newline)
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(for-each (lambda (name fp)
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(with-current-output-port outport
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(for-each display (list fp " " name))
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(newline)))
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names sums)
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(close outport)
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#t))
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(define (update-digest-files target checksum)
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(map (lambda (digest-file)
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(lambda ()
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(let ((dfile (expand-file-name digest-file (cwd)))
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(tname (file-name-nondirectory target)))
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(and (file-exists? dfile)
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(let* ((*fname-md5* (digest-file->string-list dfile))
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(cleaned-table (if (or (null? *fname-md5*)
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(null? (car *fname-md5*)))
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(list)
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(alist-delete tname *fname-md5*))))
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(string-list->digest-file
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dfile
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(alist-cons tname checksum cleaned-table)))))))
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digest-files))
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(define (checksum-changed? target)
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(let* ((inport (open-input-file target))
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(checksum (md5-digest->number (md5-digest-for-port inport)))
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(result-funcs (append (check-files-target+extensions target checksum)
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(check-digest-files target checksum))))
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(close inport)
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(not (let each-result-and ((current (car result-funcs))
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(todo (cdr result-funcs)))
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(let ((res (current)))
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(and res
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(or (null? todo)
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(each-result-and (car todo) (cdr todo)))))))))
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(define (md5-sum-update target)
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(let* ((tname (expand-file-name target (cwd)))
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(inport (open-input-file tname))
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(checksum (md5-digest->number (md5-digest-for-port inport)))
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(update-funcs (append (update-files-target+extensions target checksum)
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(update-digest-files target checksum))))
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(close inport)
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(let ((update-ok? (lambda ()
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(let each-update-and ((current (car update-funcs))
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(todo (cdr update-funcs)))
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(or (current)
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(and (not (null? todo))
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(each-update-and (car todo) (cdr todo))))))))
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;; the default is to use the filename with .md5 extension
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(if (not (update-ok?))
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(let ((outport (open-output-file (string-append tname ".md5"))))
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(with-current-output-port outport
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(begin
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(display checksum)
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(newline)))
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(close outport))))))
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