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authorDavid Craven <david@craven.ch>2016-09-22 11:40:58 +0200
committerDavid Craven <david@craven.ch>2016-12-14 16:30:42 +0100
commit3e0c036584b41bcc08a8c8e040295716108bb0b2 (patch)
treefb90e055f18d75cec57107b1be4a457b3dcf1af0 /guix/import/crate.scm
parentbb3f36ed4ca83f01eb422f9de9c404d53218b382 (diff)
import: Add importer for rust crates.
* guix/import/crate.scm: New file. * guix/scripts/import/crate.scm: New file. * guix/scripts/import.scm (importers): Add crate importer. * tests/crate.scm: New file. * doc/guix.texi: Add crate importer to table. * Makefile.am (MODULES, SCM_TESTS): Add files.
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diff --git a/guix/import/crate.scm b/guix/import/crate.scm
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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))
+
+(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 #\_) "-")))
+