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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
;;;
;;; 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 hackage)
#:use-module (guix ui)
#:use-module (guix utils)
#:use-module (guix packages)
#:use-module (guix scripts)
#:use-module (guix import hackage)
#:use-module (guix scripts import)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:export (guix-import-hackage))
;;;
;;; Command-line options.
;;;
(define ghc-default-version
(string-append "ghc-" (package-version (@ (gnu packages haskell) ghc))))
(define %default-options
`((include-test-dependencies? . #t)
(read-from-stdin? . #f)
(cabal-environment . ,`(("impl" . ,ghc-default-version)))))
(define (show-help)
(display (_ "Usage: guix import hackage PACKAGE-NAME
Import and convert the Hackage package for PACKAGE-NAME. If PACKAGE-NAME
includes a suffix constituted by a at-sign followed by a numerical version (as
used with Guix packages), then a definition for the specified version of the
package will be generated. If no version suffix is pecified, then the
generated package definition will correspond to the latest available
version.\n"))
(display (_ "
-e ALIST, --cabal-environment=ALIST
specify environment for Cabal evaluation"))
(display (_ "
-h, --help display this help and exit"))
(display (_ "
-s, --stdin read from standard input"))
(display (_ "
-t, --no-test-dependencies don't include test-only dependencies"))
(display (_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define %options
;; Specification of the command-line options.
(cons* (option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix import hackage")))
(option '(#\t "no-test-dependencies") #f #f
(lambda (opt name arg result)
(alist-cons 'include-test-dependencies? #f
(alist-delete 'include-test-dependencies?
result))))
(option '(#\s "stdin") #f #f
(lambda (opt name arg result)
(alist-cons 'read-from-stdin? #t
(alist-delete 'read-from-stdin?
result))))
(option '(#\e "cabal-environment") #t #f
(lambda (opt name arg result)
(alist-cons 'cabal-environment (read/eval arg)
(alist-delete 'cabal-environment
result))))
%standard-import-options))
;;;
;;; Entry point.
;;;
(define (guix-import-hackage . args)
(define (parse-options)
;; Return the alist of option values.
(args-fold* args %options
(lambda (opt name arg result)
(leave (_ "~A: unrecognized option~%") name))
(lambda (arg result)
(alist-cons 'argument arg result))
%default-options))
(define (run-importer package-name opts error-fn)
(let ((sexp (hackage->guix-package
package-name
#:include-test-dependencies?
(assoc-ref opts 'include-test-dependencies?)
#:port (if (assoc-ref opts 'read-from-stdin?)
(current-input-port)
#f)
#:cabal-environment
(assoc-ref opts 'cabal-environment))))
(unless sexp (error-fn))
sexp))
(let* ((opts (parse-options))
(args (filter-map (match-lambda
(('argument . value)
value)
(_ #f))
(reverse opts))))
(if (assoc-ref opts 'read-from-stdin?)
(match args
(()
(run-importer "stdin" opts
(lambda ()
(leave (_ "failed to import cabal file \
from standard input~%")))))
((many ...)
(leave (_ "too many arguments~%"))))
(match args
((package-name)
(run-importer package-name opts
(lambda ()
(leave (_ "failed to download cabal file \
for package '~a'~%")
package-name))))
(()
(leave (_ "too few arguments~%")))
((many ...)
(leave (_ "too many arguments~%")))))))
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