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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 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 import stackage)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (guix import json)
#:use-module (guix import hackage)
#:use-module (guix memoization)
#:use-module (guix packages)
#:use-module (guix upstream)
#:export (stackage->guix-package
stackage-lts->guix-packages
%stackage-updater))
\f
;;;
;;; Stackage info fetcher and access functions
;;;
(define %stackage-url "http://www.stackage.org")
(define (lts-info-ghc-version lts-info)
"Retruns the version of the GHC compiler contained in LTS-INFO."
(match lts-info
((("snapshot" ("ghc" . version) _ _) _) version)
(_ #f)))
(define (lts-info-packages lts-info)
"Retruns the alist of packages contained in LTS-INFO."
(match lts-info
((_ ("packages" pkg ...)) pkg)
(_ '())))
(define stackage-lts-info-fetch
;; "Retrieve the information about the LTS Stackage release VERSION."
(memoize
(lambda* (#:optional (version ""))
(let* ((url (if (string=? "" version)
(string-append %stackage-url "/lts")
(string-append %stackage-url "/lts-" version)))
(lts-info (json-fetch url)))
(if lts-info
(reverse lts-info)
(begin
(format (current-error-port)
"guix import stackage: LTS release version not found: ~a~%"
version)
#f))))))
(define (stackage-package-name pkg-info)
(assoc-ref pkg-info "name"))
(define (stackage-package-version pkg-info)
(assoc-ref pkg-info "version"))
(define (lts-package-version pkgs-info name)
"Return the version of the package with upstream NAME included in PKGS-INFO."
(let ((pkg (find (lambda (pkg) (string=? (stackage-package-name pkg) name))
pkgs-info)))
(stackage-package-version pkg)))
\f
;;;
;;; Hackage importer low-level help functions
;;;
(define guix-package->hackage-name
(@@ (guix import hackage) guix-package->hackage-name))
(define hackage-fetch
(@@ (guix import hackage) hackage-fetch))
(define hackage-source-url
(@@ (guix import hackage) hackage-source-url))
(define hackage-cabal-url
(@@ (guix import hackage) hackage-cabal-url))
\f
;;;
;;; Importer entry point
;;;
(define (hackage-name-version name version)
(and version (string-append name "@" version)))
(define* (stackage->guix-package package-name ; upstream name
#:key
(include-test-dependencies? #t)
(lts-version "")
(packages-info
(lts-info-packages
(stackage-lts-info-fetch lts-version))))
"Fetch Cabal file for PACKAGE-NAME from hackage.haskell.org. The retrieved
vesion corresponds to the version of PACKAGE-NAME specified in the LTS-VERSION
release at stackage.org. Return the `package' S-expression corresponding to
that package, or #f on failure. PACKAGES-INFO is the alist with the packages
included in the Stackage LTS release."
(let* ((version (lts-package-version packages-info package-name))
(name-version (hackage-name-version package-name version)))
(if name-version
(hackage->guix-package name-version
#:include-test-dependencies?
include-test-dependencies?)
(begin
(format (current-error-port)
"guix import stackage: package not found: ~a~%" package-name)
#f))))
(define* (stackage-lts->guix-packages #:key
(include-test-dependencies? #t)
(lts-version ""))
"Fetch the Cabal files of all packages included in the Stackage LTS release
LTS-VERSION and produce a list with a Guix package S-expression for each of
them. If we fail to parse the Cabal file we omit that package from the result."
(let* ((pkgs-info (lts-info-packages (stackage-lts-info-fetch lts-version)))
(hackage-names (map stackage-package-name pkgs-info)))
(filter (cut stackage->guix-package <>
#:include-test-dependencies? include-test-dependencies?
#:lts-version lts-version
#:packages-info pkgs-info)
hackage-names)))
\f
;;;
;;; Updater
;;;
(define* (latest-lts-release package
#:optional
(packages-info (lts-info-packages
(stackage-lts-info-fetch))))
"Return an <upstream-source> for the latest Stackage LTS release of PACKAGE
or #f it the package is not inlucded in the Stackage LTS release."
(let* ((hackage-name (guix-package->hackage-name package))
(version (lts-package-version packages-info hackage-name))
(name-version (hackage-name-version hackage-name version))
(cabal-meta (and=> name-version hackage-fetch)))
(match cabal-meta
(#f
(format (current-error-port)
"warning: failed to parse ~a~%"
(hackage-cabal-url hackage-name))
#f)
(_
(let ((url (hackage-source-url hackage-name version)))
(upstream-source
(package (package-name package))
(version version)
(urls (list url))))))))
(define %stackage-updater
(upstream-updater
(name 'stackage)
(description "Updater for Stackage LTS packages")
(pred (@@ (guix import hackage) hackage-package?))
(latest latest-lts-release)))
;;; stackage.scm ends here
|