;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2014 David Thompson <davet@gnu.org> ;;; ;;; 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 scripts import) #:use-module (guix ui) #:use-module (guix utils) #:use-module (srfi srfi-1) #:use-module (srfi srfi-11) #:use-module (srfi srfi-26) #:use-module (srfi srfi-37) #:use-module (ice-9 format) #:use-module (ice-9 match) #:use-module (ice-9 pretty-print) #:export (%standard-import-options guix-import)) ;;; ;;; Helper. ;;; (define (newline-rewriting-port output) "Return an output port that rewrites strings containing the \\n escape to an actual newline. This works around the behavior of `pretty-print' and `write', which output these as \\n instead of actual newlines, whereas we want the `description' field to contain actual newlines rather than \\n." (define (write-string str) (let loop ((chars (string->list str))) (match chars (() #t) ((#\\ #\n rest ...) (newline output) (loop rest)) ((chr rest ...) (write-char chr output) (loop rest))))) (make-soft-port (vector (cut write-char <>) write-string (lambda _ #t) ; flush #f (lambda _ #t) ; close #f) "w")) ;;; ;;; Command line options. ;;; (define %standard-import-options '()) ;;; ;;; Entry point. ;;; (define importers '("gnu" "nix" "pypi" "cpan" "hackage" "elpa" "gem" "cran")) (define (resolve-importer name) (let ((module (resolve-interface `(guix scripts import ,(string->symbol name)))) (proc (string->symbol (string-append "guix-import-" name)))) (module-ref module proc))) (define (show-help) (display (_ "Usage: guix import IMPORTER ARGS ... Run IMPORTER with ARGS.\n")) (newline) (display (_ "IMPORTER must be one of the importers listed below:\n")) (newline) (format #t "~{ ~a~%~}" importers) (display (_ " -h, --help display this help and exit")) (display (_ " -V, --version display version information and exit")) (newline) (show-bug-report-information)) (define (guix-import . args) (match args (() (format (current-error-port) (_ "guix import: missing importer name~%"))) ((or ("-h") ("--help")) (show-help) (exit 0)) (("--version") (show-version-and-exit "guix import")) ((importer args ...) (if (member importer importers) (let ((expr (apply (resolve-importer importer) args))) (pretty-print expr (newline-rewriting-port (current-output-port)))) (format (current-error-port) (_ "guix import: invalid importer~%"))))))