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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2022 pukkamustard <pukkamustard@posteo.net>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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.
;;;
;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix eris)
#:use-module (eris)
#:use-module (guix config)
#:use-module (guix eris fs-store)
#:use-module (guix eris http)
#:use-module (web uri)
#:use-module (ice-9 match)
#:export (guix-eris-block-reducer
guix-eris-block-ref
%eris-block-store-directory))
(define %eris-block-store-directory
(make-parameter
(or (getenv "GUIX_ERIS_BLOCK_STORE_DIRECTORY")
(string-append %state-directory "/eris"))))
(define (guix-eris-block-reducer)
"Returns a block reducer that stores blocks of ERIS encoded content."
(eris-fs-store-reducer (%eris-block-store-directory)))
(define %eris-peers
(make-parameter
;; TODO
(list (string->uri "http://localhost:8081"))))
(define* (try-in-order ref #:key block-refs)
(match block-refs
((block-ref . rest)
(let ((block (block-ref ref)))
(if block
block
(try-in-order ref #:block-refs rest))))
(() #f)))
(define* (peer->block-ref peer #:key open-connection)
(case (uri-scheme peer)
((http https)
(lambda (ref)
(eris-http-block-ref ref
#:host peer
#:open-connection open-connection)))
;; unsupported ERIS peer URL
(else (lambda (_) #f))))
(define* (guix-eris-block-ref ref #:key open-connection)
(try-in-order
ref
#:block-refs
(cons
;; first try and get block from local block store
(lambda (ref)
(eris-fs-store-ref ref
#:store-directory (%eris-block-store-directory)))
;; then try peers
(map (lambda (peer)
(peer->block-ref peer #:open-connection open-connection))
(%eris-peers)))))
|