;;; 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 (gnu packages rust)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bootstrap)
  #:use-module (gnu packages commencement)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages elf)
  #:use-module (gnu packages gcc)
  #:use-module (guix build-system gnu)
  #:use-module (guix download)
  #:use-module (guix packages)
  #:use-module ((guix licenses) #:prefix license:))

(define rust-bootstrap-x86_64-1.12.0
  (origin
    (method url-fetch)
    (uri (string-append
          "https://static.rust-lang.org/dist/"
          "rust-beta-x86_64-unknown-linux-gnu.tar.gz"))
    (sha256
     (base32
      "1is1k93zarvxx0h7b57ga8vr9gj34b36l9la6zkph41x33gfgpvl"))))

(define-public rustc-bootstrap
  (package
    (name "rustc-bootstrap")
    (version "1.12.0")
    (source rust-bootstrap-x86_64-1.12.0)
    (build-system gnu-build-system)
    (native-inputs
     `(("patchelf" ,patchelf)))
    (inputs
     `(("gcc-lib" ,gcc "lib")
       ("gcc-toolchain-6" ,gcc-toolchain-6)
       ("zlib" ,zlib)))
    (arguments
     `(#:tests? #f
       #:strip-binaries? #f
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)
         (delete 'build)
         (replace 'install
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out"))
                   (gcc-lib (assoc-ref inputs "gcc-lib"))
                   (toolchain (assoc-ref inputs "gcc-toolchain-6"))
                   (zlib (assoc-ref inputs "zlib"))
                   (platform ,(system->rust-platform (%current-system)))
                   (ld-so (string-append (assoc-ref inputs "libc")
                                         ,(glibc-dynamic-linker))))
               (system* "bash" "install.sh"
                        (string-append "--prefix=" out)
                        (string-append "--components=rustc,"
                                       "rust-std-" platform))
               (for-each
                (lambda (file)
                  (system* "patchelf"
                           "--set-rpath"
                           (string-append out "/lib:" zlib "/lib:"
                                          gcc-lib "/lib:" toolchain "/lib")
                           file))
                (cons* (string-append out "/bin/rustc")
                       (string-append out "/bin/rustdoc")
                       (find-files out "\\.so$")))
               (for-each
                (lambda (file)
                  (system* "patchelf"
                           "--set-interpreter" ld-so
                           file))
                (list (string-append out "/bin/rustc")
                      (string-append out "/bin/rustdoc")))
               ;; Rust requires a gcc toolchain for linking. It
               ;; looks for a compiler named cc in it's path. This
               ;; can probably be configured during the build.
               (symlink (string-append toolchain "/bin/gcc")
                        (string-append out "/bin/cc"))))))))
    (home-page "https://www.rust-lang.org")
    (synopsis "Rustc bootstrap")
    (description "This package prepares the rustc binary for bootstrapping
the rustc package.")
    (license license:asl2.0)))

(define-public cargo-bootstrap
  (package
    (name "cargo-bootstrap")
    (version "1.12.0")
    (source rust-bootstrap-x86_64-1.12.0)
    (build-system gnu-build-system)
    (native-inputs
     `(("patchelf" ,patchelf)))
    (inputs
     `(("gcc-lib" ,gcc "lib")
       ("gcc-toolchain-6" ,gcc-toolchain-6)))
    (arguments
     `(#:tests? #f
       #:strip-binaries? #f
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)
         (delete 'build)
         (replace 'install
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out"))
                   (platform ,(system->rust-platform (%current-system)))
                   (ld-so (string-append (assoc-ref inputs "libc")
                                         ,(glibc-dynamic-linker))))
               (system* "bash" "install.sh"
                        (string-append "--prefix=" out)
                        "--components=cargo")
               (zero? (system* "patchelf"
                               "--set-interpreter" ld-so
                               "--set-rpath"
                               (string-append
                                out "/lib:"
                                (assoc-ref inputs "gcc-lib") "/lib:"
                                (assoc-ref inputs "gcc-toolchain-6") "/lib")
                      (string-append out "/bin/cargo")))))))))
    (home-page "https://www.rust-lang.org")
    (synopsis "Cargo bootstrap")
    (description "This package prepares the cargo binary for bootstrapping
the cargo package and it's dependencies.  When rustc is build using the new
rustbuild build system it also requires cargo.  The gnu build system is going
to be deprecated.")
    (license license:asl2.0)))