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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2019 Ludovic Courtès <ludo@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 import crate)
#:use-module (guix base32)
#:use-module (guix build-system cargo)
#:use-module ((guix download) #:prefix download:)
#:use-module (gcrypt hash)
#:use-module (guix http-client)
#:use-module (guix json)
#: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 regex)
#: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))
;;;
;;; Interface to https://crates.io/api/v1.
;;;
;; Crates. A crate is essentially a "package". It can have several
;; "versions", each of which has its own set of dependencies, license,
;; etc.--see <crate-version> below.
(define-json-mapping <crate> make-crate crate?
json->crate
(name crate-name) ;string
(latest-version crate-latest-version "max_version") ;string
(home-page crate-home-page "homepage") ;string | #nil
(repository crate-repository) ;string
(description crate-description) ;string
(keywords crate-keywords ;list of strings
"keywords" vector->list)
(categories crate-categories ;list of strings
"categories" vector->list)
(versions crate-versions "actual_versions" ;list of <crate-version>
(lambda (vector)
(map json->crate-version
(vector->list vector))))
(links crate-links)) ;alist
;; Crate version.
(define-json-mapping <crate-version> make-crate-version crate-version?
json->crate-version
(id crate-version-id) ;integer
(number crate-version-number "num") ;string
(download-path crate-version-download-path "dl_path") ;string
(readme-path crate-version-readme-path "readme_path") ;string
(license crate-version-license "license") ;string
(links crate-version-links)) ;alist
;; Crate dependency. Each dependency (each edge in the graph) is annotated as
;; being a "normal" dependency or a development dependency. There also
;; information about the minimum required version, such as "^0.0.41".
(define-json-mapping <crate-dependency> make-crate-dependency
crate-dependency?
json->crate-dependency
(id crate-dependency-id "crate_id") ;string
(kind crate-dependency-kind "kind" ;'normal | 'dev
string->symbol)
(requirement crate-dependency-requirement "req")) ;string
(define (lookup-crate name)
"Look up NAME on https://crates.io and return the corresopnding <crate>
record or #f if it was not found."
(let ((json (json-fetch (string-append (%crate-base-url) "/api/v1/crates/"
name))))
(and=> (and json (assoc-ref json "crate"))
(lambda (alist)
;; The "versions" field of ALIST is simply a list of version IDs
;; (integers). Here, we squeeze in the actual version
;; dictionaries that are not part of ALIST but are just more
;; convenient handled this way.
(let ((versions (or (assoc-ref json "versions") '#())))
(json->crate `(,@alist
("actual_versions" . ,versions))))))))
(define (crate-version-dependencies version)
"Return the list of <crate-dependency> records of VERSION, a
<crate-version>."
(let* ((path (assoc-ref (crate-version-links version) "dependencies"))
(url (string-append (%crate-base-url) path)))
(match (assoc-ref (or (json-fetch url) '()) "dependencies")
((? vector? vector)
(map json->crate-dependency (vector->list vector)))
(_
'()))))
;;;
;;; Converting crates to Guix packages.
;;;
(define (maybe-cargo-inputs package-names)
(match (package-names->package-inputs package-names)
(()
'())
((package-inputs ...)
`(#:cargo-inputs ,package-inputs))))
(define (maybe-cargo-development-inputs package-names)
(match (package-names->package-inputs package-names)
(()
'())
((package-inputs ...)
`(#:cargo-development-inputs ,package-inputs))))
(define (maybe-arguments arguments)
(match arguments
(()
'())
((args ...)
`((arguments (,'quasiquote ,args))))))
(define* (make-crate-sexp #:key name version cargo-inputs cargo-development-inputs
home-page synopsis description license
#:allow-other-keys)
"Return the `package' s-expression for a rust package with the given NAME,
VERSION, CARGO-INPUTS, CARGO-DEVELOPMENT-INPUTS, HOME-PAGE, SYNOPSIS, DESCRIPTION,
and LICENSE."
(let* ((port (http-fetch (crate-uri name version)))
(guix-name (crate-name->package-name name))
(cargo-inputs (map crate-name->package-name cargo-inputs))
(cargo-development-inputs (map crate-name->package-name
cargo-development-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-arguments (append (maybe-cargo-inputs cargo-inputs)
(maybe-cargo-development-inputs
cargo-development-inputs)))
(home-page ,(match home-page
(() "")
(_ home-page)))
(synopsis ,synopsis)
(description ,(beautify-description description))
(license ,(match license
(() #f)
((license) license)
(_ `(list ,@license)))))))
(close-port port)
pkg))
(define %dual-license-rx
;; Dual licensing is represented by a string such as "MIT OR Apache-2.0".
;; This regexp matches that.
(make-regexp "^(.*) OR (.*)$"))
(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."
(define (string->license string)
(match (regexp-exec %dual-license-rx string)
(#f (list (spdx-string->license string)))
(m (list (spdx-string->license (match:substring m 1))
(spdx-string->license (match:substring m 2))))))
(define (normal-dependency? dependency)
(eq? (crate-dependency-kind dependency) 'normal))
(define crate
(lookup-crate crate-name))
(and crate
(let* ((version (find (lambda (version)
(string=? (crate-version-number version)
(crate-latest-version crate)))
(crate-versions crate)))
(dependencies (crate-version-dependencies version))
(dep-crates (filter normal-dependency? dependencies))
(dev-dep-crates (remove normal-dependency? dependencies))
(cargo-inputs (sort (map crate-dependency-id dep-crates)
string-ci<?))
(cargo-development-inputs
(sort (map crate-dependency-id dev-dep-crates)
string-ci<?)))
(make-crate-sexp #:name crate-name
#:version (crate-version-number version)
#:cargo-inputs cargo-inputs
#:cargo-development-inputs cargo-development-inputs
#:home-page (or (crate-home-page crate)
(crate-repository crate))
#:synopsis (crate-description crate)
#:description (crate-description crate)
#:license (and=> (crate-version-license version)
string->license)))))
(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))
(crate (lookup-crate crate-name))
(version (crate-latest-version crate))
(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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