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-rw-r--r--doc/guix.texi12
-rw-r--r--guix/import/crate.scm29
-rw-r--r--guix/scripts/import/crate.scm13
3 files changed, 40 insertions, 14 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 9101aafda1..989b3d03bb 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -8912,7 +8912,17 @@ in Guix.
@item crate
@cindex crate
Import metadata from the crates.io Rust package repository
-@uref{https://crates.io, crates.io}.
+@uref{https://crates.io, crates.io}, as in this example:
+
+@example
+guix import crate blake2-rfc
+@end example
+
+The crate importer also allows you to specify a version string:
+
+@example
+guix import crate constant-time-eq@@0.1.0
+@end example
@item opam
@cindex OPAM
diff --git a/guix/import/crate.scm b/guix/import/crate.scm
index f6057dbf8b..fd1974eae8 100644
--- a/guix/import/crate.scm
+++ b/guix/import/crate.scm
@@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2019 Martin Becze <mjbecze@riseup.net>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -181,9 +182,11 @@ and LICENSE."
;; This regexp matches that.
(make-regexp "^(.*) OR (.*)$"))
-(define (crate->guix-package crate-name)
+(define* (crate->guix-package crate-name #:optional version)
"Fetch the metadata for CRATE-NAME from crates.io, and return the
-`package' s-expression corresponding to that package, or #f on failure."
+`package' s-expression corresponding to that package, or #f on failure.
+When VERSION is specified, attempt to fetch that version; otherwise fetch the
+latest version of CRATE-NAME."
(define (string->license string)
(match (regexp-exec %dual-license-rx string)
(#f (list (spdx-string->license string)))
@@ -196,12 +199,18 @@ and LICENSE."
(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))
+ (define version-number
+ (or version
+ (crate-latest-version crate)))
+
+ (define version*
+ (find (lambda (version)
+ (string=? (crate-version-number version)
+ version-number))
+ (crate-versions crate)))
+
+ (and crate version*
+ (let* ((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)
@@ -210,14 +219,14 @@ and LICENSE."
(sort (map crate-dependency-id dev-dep-crates)
string-ci<?)))
(make-crate-sexp #:name crate-name
- #:version (crate-version-number version)
+ #: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)
+ #:license (and=> (crate-version-license version*)
string->license)))))
(define (guix-package->crate-name package)
diff --git a/guix/scripts/import/crate.scm b/guix/scripts/import/crate.scm
index cab9a4397b..7ae8638911 100644
--- a/guix/scripts/import/crate.scm
+++ b/guix/scripts/import/crate.scm
@@ -2,6 +2,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 David Thompson <davet@gnu.org>
;;; Copyright © 2016 David Craven <david@craven.ch>
+;;; Copyright © 2019 Martin Becze <mjbecze@riseup.net>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -75,6 +76,7 @@ Import and convert the crate.io package for PACKAGE-NAME.\n"))
(alist-cons 'argument arg result))
%default-options))
+
(let* ((opts (parse-options))
(args (filter-map (match-lambda
(('argument . value)
@@ -82,11 +84,16 @@ Import and convert the crate.io package for PACKAGE-NAME.\n"))
(_ #f))
(reverse opts))))
(match args
- ((package-name)
- (let ((sexp (crate->guix-package package-name)))
+ ((spec)
+ (define-values (name version)
+ (package-name->name+version spec))
+
+ (let ((sexp (crate->guix-package name version)))
(unless sexp
(leave (G_ "failed to download meta-data for package '~a'~%")
- package-name))
+ (if version
+ (string-append name "@" version)
+ name)))
sexp))
(()
(leave (G_ "too few arguments~%")))