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;;; run64 --- SRFI-64 test runner
;;; Copyright © 2025–2026 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of run64.
;;;
;;; run64 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.
;;;
;;; run64 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 run64.  If not, see <https://www.gnu.org/licenses/>.

(define-module (run64-website)
  #:use-module ((gnu packages textutils) #:select (aha))
  #:use-module ((gnu packages guile) #:select (guile-3.0))
  #:use-module ((gnu packages haskell-xyz) #:select (pandoc))
  #:use-module (guix gexp)
  #:use-module (guix packages)
  #:use-module ((run64-package) #:select (guile-run64)))

(define run64-website-home-page-gexp
  (with-imported-modules '((guix build utils))
    #~(begin
        (use-modules (guix build utils)
                     (rnrs base)
                     (rnrs io ports)
                     (srfi srfi-11)
                     (srfi srfi-26)
                     (ice-9 match)
                     (ice-9 popen))

        ;; Run run64 on example.scm to produce example-output.html.
        (set-path-environment-variable "PATH"
                                       '("bin")
                                       (list #$aha #$guile-3.0 #$guile-run64))
        (copy-file #$(file-append (package-source guile-run64)
                                  "/example.scm")
                   "example.scm")
        (let ((commands '(("guile-run64" "example.scm")
                          ("aha" "--no-header")))
              (success? (lambda (pid)
                          (match (waitpid pid)
                            ((_ . status)
                             (zero? (status:exit-val status)))))))
          (let-values (((from to pids) (pipeline commands)))
            (let ((example-output (get-bytevector-all from)))
              (match pids
                ((aha-pid guile-run64-pid)
                 ;; We only check for the success of aha since guile-run64 is
                 ;; supposed to fail.
                 (assert (success? aha-pid))))
              (close to)
              (close from)
              (call-with-output-file "example-output.html"
                (cut put-bytevector <> example-output)))))

        (invoke #$(file-append pandoc "/bin/pandoc")
                (string-append "--lua-filter="
                               #$(local-file "../website/insert-example-output.lua"))
                "--standalone"
                "--metadata" "title=run64"
                "--css=style.css"
                (string-append "--output=" #$output)
                #$(file-append (package-source guile-run64)
                               "/README.md")))))

(define-public run64-website
  (file-union "run64-website"
              `(("index.html"
                 ,(computed-file "run64-website-home-page.html"
                                 run64-website-home-page-gexp))
                ("style.css" ,(local-file "../website/style.css"))
                ("releases" ,(local-file "../website/releases"
                                         #:recursive? #t)))))

run64-website