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;;; Haunt --- Static site generator for GNU Guile
;;; Copyright © 2020 David Thompson <davet@gnu.org>
;;;
;;; This file is part of Haunt.
;;;
;;; Haunt is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; Haunt is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Haunt. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Build artifact data type.
;;
;;; Code:
(define-module (haunt artifact)
#:use-module (haunt utils)
#:use-module (ice-9 match)
#:use-module (ice-9 popen)
#:use-module (srfi srfi-9)
#:export (make-artifact
artifact?
artifact-file-name
artifact-writer
create-artifact
serialized-artifact
verbatim-artifact
external-artifact))
(define-record-type <artifact>
(make-artifact file-name writer)
artifact?
(file-name artifact-file-name)
(writer artifact-writer))
(define (create-artifact artifact prefix)
(let ((output (string-append prefix "/" (artifact-file-name artifact))))
(mkdir-p (dirname output))
((artifact-writer artifact) output)
(unless (file-exists? output)
(error "failed to create artifact output file" output))))
(define (serialized-artifact destination obj serialize)
(make-artifact destination
(lambda (output)
(format #t "write '~a'~%" destination)
(call-with-output-file output
(lambda (port)
(serialize obj port))))))
(define (verbatim-artifact source destination)
(unless (file-exists? source)
(error "verbatim artifact source file does not exist" source))
(make-artifact destination
(lambda (output)
(format #t "copy '~a' → '~a'~%" source destination)
(copy-file source output))))
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