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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Craven <david@craven.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 crate)
#:use-module (guix base32)
#:use-module (guix build-system cargo)
#:use-module ((guix download) #:prefix download:)
#:use-module (guix hash)
#:use-module (guix http-client)
#:use-module (guix import json)
#:use-module (guix import utils)
#:use-module ((guix licenses) #:prefix license:)
#:use-module (guix monads)
#:use-module (guix packages)
#:use-module (guix upstream)
#:use-module (guix utils)
#:use-module (ice-9 match)
#:use-module (ice-9 pretty-print) ; recursive
#:use-module (json)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-2)
#:use-module (srfi srfi-26)
#:export (crate->guix-package
guix-package->crate-name
%crate-updater))
(define (crate-fetch crate-name callback)
"Fetch the metadata for CRATE-NAME from crates.io and call the callback."
(define (crates->inputs crates)
(sort (map (cut assoc-ref <> "crate_id") crates) string-ci<?))
(define (string->license string)
(map spdx-string->license (string-split string #\/)))
(define (crate-kind-predicate kind)
(lambda (dep) (string=? (assoc-ref dep "kind") kind)))
(and-let* ((crate-json (json-fetch (string-append crate-url crate-name)))
(crate (assoc-ref crate-json "crate"))
(name (assoc-ref crate "name"))
(version (assoc-ref crate "max_version"))
(home-page (assoc-ref crate "homepage"))
(synopsis (assoc-ref crate "description"))
(description (assoc-ref crate "description"))
(license (string->license (assoc-ref crate "license")))
(path (string-append "/" version "/dependencies"))
(deps-json (json-fetch (string-append crate-url name path)))
(deps (assoc-ref deps-json "dependencies"))
(input-crates (filter (crate-kind-predicate "normal") deps))
(native-input-crates
(filter (lambda (dep)
(not ((crate-kind-predicate "normal") dep))) deps))
(inputs (crates->inputs input-crates))
(native-inputs (crates->inputs native-input-crates)))
(callback #:name name #:version version
#:inputs inputs #:native-inputs native-inputs
#:home-page home-page #:synopsis synopsis
#:description description #:license license)))
(define* (make-crate-sexp #:key name version inputs native-inputs
home-page synopsis description license
#:allow-other-keys)
"Return the `package' s-expression for a rust package with the given NAME,
VERSION, INPUTS, NATIVE-INPUTS, HOME-PAGE, SYNOPSIS, DESCRIPTION, and LICENSE."
(let* ((port (http-fetch (crate-uri name version)))
(guix-name (crate-name->package-name name))
(inputs (map crate-name->package-name inputs))
(native-inputs (map crate-name->package-name native-inputs))
(pkg `(package
(name ,guix-name)
(version ,version)
(source (origin
(method url-fetch)
(uri (crate-uri ,name version))
(file-name (string-append name "-" version ".tar.gz"))
(sha256
(base32
,(bytevector->nix-base32-string (port-sha256 port))))))
(build-system cargo-build-system)
,@(maybe-native-inputs native-inputs)
,@(maybe-inputs inputs)
(home-page ,home-page)
(synopsis ,synopsis)
(description ,(beautify-description description))
(license ,(match license
(() #f)
((license) license)
(_ `(list ,@license)))))))
(close-port port)
pkg))
(define (crate->guix-package crate-name)
"Fetch the metadata for CRATE-NAME from crates.io, and return the
`package' s-expression corresponding to that package, or #f on failure."
(crate-fetch crate-name make-crate-sexp))
(define (guix-package->crate-name package)
"Return the crate name of PACKAGE."
(and-let* ((origin (package-source package))
(uri (origin-uri origin))
(crate-url? uri)
(len (string-length crate-url))
(path (xsubstring uri len))
(parts (string-split path #\/)))
(match parts
((name _ ...) name))))
(define (crate-name->package-name name)
(string-append "rust-" (string-join (string-split name #\_) "-")))
;;;
;;; Updater
;;;
(define (crate-package? package)
"Return true if PACKAGE is a Rust crate from crates.io."
(let ((source-url (and=> (package-source package) origin-uri))
(fetch-method (and=> (package-source package) origin-method)))
(and (eq? fetch-method download:url-fetch)
(match source-url
((? string?)
(crate-url? source-url))
((source-url ...)
(any crate-url? source-url))))))
(define (latest-release package)
"Return an <upstream-source> for the latest release of PACKAGE."
(let* ((crate-name (guix-package->crate-name package))
(callback (lambda* (#:key version #:allow-other-keys) version))
(version (crate-fetch crate-name callback))
(url (crate-uri crate-name version)))
(upstream-source
(package (package-name package))
(version version)
(urls (list url)))))
(define %crate-updater
(upstream-updater
(name 'crates)
(description "Updater for crates.io packages")
(pred crate-package?)
(latest latest-release)))
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