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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Pierre Neidhardt <mail@ambrevar.xyz>
;;;
;;; 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 build gx)
#:use-module (guix build utils)
#:use-module (ice-9 popen)
#:export (gx-fetch))
;;; Commentary:
;;;
;;; This is the build-side support code of (guix gx-download). It allows a
;;; gx hash to be fetched.
;;;
;;; Code:
(define* (gx-fetch hash directory
#:key (gx-command "gx"))
"Fetch IPFS HASH into DIRECTORY. HASH must be a valid IPFS hash.
Return #t on success, #f otherwise."
(mkdir-p directory)
(with-directory-excursion directory
;; TODO: Silence verbose output.
;; Initialization is interactive, but we can shut it up by piping it to
;; nothing.
(let ((port (open-pipe* OPEN_WRITE gx-command "init")))
(display "\n" port)
(if (not (eqv? 0 (status:exit-val (close-pipe port))))
(error "Cannot initialize gx package")))
;; Fetch to the "vendor" directory.
(let ((port (open-pipe* OPEN_WRITE gx-command "import" "--local" hash)))
(display "N\n" port)
(if (not (eqv? 0 (status:exit-val (close-pipe port))))
(error "Cannot import gx package")))
(delete-file "package.json")
(mkdir-p "gx/ipfs")
(rename-file (string-append "vendor/gx/ipfs/" hash) (string-append "gx/ipfs/" hash))
(delete-file-recursively "vendor")
#t))
;;; gx.scm ends here
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