;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2016 Eric Le Bihan <eric.le.bihan.dev@free.fr>
;;; Copyright © 2016 Nikita <nikita@n0.is>
;;; Copyright © 2017 Ben Woodcroft <donttrustben@gmail.com>
;;; Copyright © 2017, 2018 Nikolai Merinov <nikolai.merinov@member.fsf.org>
;;; Copyright © 2017, 2019 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2018, 2019 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2018 Danny Milosavljevic <dannym+a@scratchpost.org>
;;; Copyright © 2019 Ivan Petkov <ivanppetkov@gmail.com>
;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
;;;
;;; 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 bison)
  #:use-module (gnu packages bootstrap)
  #:use-module (gnu packages cmake)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages curl)
  #:use-module (gnu packages elf)
  #:use-module (gnu packages flex)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages gdb)
  #:use-module (gnu packages jemalloc)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages llvm)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages ssh)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages)
  #:use-module (guix build-system cargo)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system trivial)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module ((guix build utils) #:select (alist-replace))
  #:use-module (guix utils)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-26))

;; This is the hash for the empty file, and the reason it's relevant is not
;; the most obvious.
;;
;; The root of the problem is that Cargo keeps track of a file called
;; Cargo.lock, that contains the hash of the tarball source of each dependency.
;;
;; However, tarball sources aren't handled well by Guix because of the need to
;; patch shebangs in any helper scripts. This is why we use Cargo's vendoring
;; capabilities, where instead of the tarball, a directory is provided in its
;; place. (In the case of rustc, the source code already ships with vendored
;; dependencies, but crates built with cargo-build-system undergo vendoring
;; during the build.)
;;
;; To preserve the advantages of checksumming, vendored dependencies contain
;; a file called .cargo-checksum.json, which contains the hash of the tarball,
;; as well as the list of files in it, with the hash of each file.
;;
;; The patch-cargo-checksums phase of cargo-build-system runs after
;; any Guix-specific patches to the vendored dependencies and regenerates the
;; .cargo-checksum.json files, but it's hard to know the tarball checksum that
;; should be written to the file - and taking care of any unhandled edge case
;; would require rebuilding everything that depends on rust. This is why we lie,
;; and say that the tarball has the hash of an empty file. It's not a problem
;; because cargo-build-system removes the Cargo.lock file. We can't do that
;; for rustc because of a quirk of its build system, so we modify the lock file
;; to substitute the hash.
(define %cargo-reference-hash
  "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")

(define* (nix-system->gnu-triplet-for-rust
          #:optional (system (%current-system)))
  (match system
    ("x86_64-linux"   "x86_64-unknown-linux-gnu")
    ("i686-linux"     "i686-unknown-linux-gnu")
    ("armhf-linux"    "armv7-unknown-linux-gnueabihf")
    ("aarch64-linux"  "aarch64-unknown-linux-gnu")
    ("mips64el-linux" "mips64el-unknown-linux-gnuabi64")
    (_                (nix-system->gnu-triplet system))))

(define* (rust-uri version #:key (dist "static"))
  (string-append "https://" dist ".rust-lang.org/dist/"
                 "rustc-" version "-src.tar.gz"))

(define* (rust-bootstrapped-package base-rust version checksum)
  "Bootstrap rust VERSION with source checksum CHECKSUM using BASE-RUST."
  (package
    (inherit base-rust)
    (version version)
    (source
      (origin
        (inherit (package-source base-rust))
        (uri (rust-uri version))
        (sha256 (base32 checksum))))
    (native-inputs
     (alist-replace "cargo-bootstrap" (list base-rust "cargo")
                    (alist-replace "rustc-bootstrap" (list base-rust)
                                   (package-native-inputs base-rust))))))

(define-public mrustc
  (let ((rustc-version "1.19.0"))
    (package
      (name "mrustc")
      (version "0.9")
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/thepowersgang/mrustc")
                      (commit (string-append "v" version))))
                (file-name (git-file-name name version))
                (sha256
                 (base32
                  "194ny7vsks5ygiw7d8yxjmp1qwigd71ilchis6xjl6bb2sj97rd2"))))
      (outputs '("out" "cargo"))
      (build-system gnu-build-system)
      (inputs
       `(("zlib" ,zlib)))
      (native-inputs
       `(("bison" ,bison)
         ("flex" ,flex)
         ;; Required for the libstd sources.
         ("rustc" ,(package-source rust-1.19))))
      (arguments
       `(#:test-target "test"
         #:make-flags
         (list ,(string-append "RUSTC_TARGET="
                               (or (%current-target-system)
                                   (nix-system->gnu-triplet-for-rust))))
         #:phases
         (modify-phases %standard-phases
          (add-after 'unpack 'patch-date
            (lambda _
              (substitute* "Makefile"
               (("shell date") "shell date -d @1"))
              (substitute* "run_rustc/Makefile"
               (("[$]Vtime ") "$V "))
              #t))
           (add-after 'patch-date 'unpack-target-compiler
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (invoke "tar" "xf" (assoc-ref inputs "rustc"))
               (chdir ,(string-append "rustc-" rustc-version "-src"))
               (invoke "patch" "-p0" ,(string-append "../rustc-" rustc-version
                                                     "-src.patch"))
               (chdir "..")
               (setenv "RUSTC_VERSION" ,rustc-version)
               (setenv "MRUSTC_TARGET_VER"
                ,(version-major+minor rustc-version))
               (setenv "OUTDIR_SUF" "")
               #t))
           (replace 'configure
             (lambda* (#:key inputs #:allow-other-keys)
               (setenv "CC" (string-append (assoc-ref inputs "gcc")
                                           "/bin/gcc"))
               (setenv "CXX" (string-append (assoc-ref inputs "gcc")
                                            "/bin/g++"))
               #t))
           (add-after 'build 'build-minicargo
             (lambda* (#:key make-flags #:allow-other-keys)
               ;; TODO: minicargo.mk: RUSTC_VERSION=$(RUSTC_VERSION) RUSTC_CHANNEL=$(RUSTC_SRC_TY) OUTDIR_SUF=$(OUTDIR_SUF)
               (apply invoke "make" "-f" "minicargo.mk" "LIBS" make-flags)
               (apply invoke "make" "-C" "tools/minicargo" make-flags)))
           ;(add-after 'check 'check-locally
           ;  (lambda* (#:key make-flags #:allow-other-keys)
           ;    ;; The enum test wouldn't work otherwise.
           ;    ;; See <https://github.com/thepowersgang/mrustc/issues/137>.
           ;    (setenv "MRUSTC_TARGET_VER" ,(version-major+minor rustc-version))
           ;    (apply invoke "make" "local_tests" make-flags)))
           (replace 'install
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (let* ((out (assoc-ref outputs "out"))
                      (bin (string-append out "/bin"))
                      (tools-bin (string-append out "/tools/bin"))
                      (cargo-out (assoc-ref outputs "cargo"))
                      (cargo-bin (string-append cargo-out "/bin"))
                      (lib (string-append out "/lib"))
                      (lib/rust (string-append lib "/mrust"))
                      (gcc (assoc-ref inputs "gcc"))
                      (run_rustc (string-append out
                                                "/share/mrustc/run_rustc")))
                 ;; These files are not reproducible.
                 (for-each delete-file (find-files "output" "\\.txt$"))
                 ;(delete-file-recursively "output/local_tests")
                 (mkdir-p (dirname lib/rust))
                 (copy-recursively "output" lib/rust)
                 (mkdir-p bin)
                 (mkdir-p tools-bin)
                 (install-file "bin/mrustc" bin)
                 ;; minicargo uses relative paths to resolve mrustc.
                 (install-file "tools/bin/minicargo" tools-bin)
                 (install-file "tools/bin/minicargo" cargo-bin)
                 (mkdir-p run_rustc)
                 (copy-file "run_rustc/Makefile"
                            (string-append run_rustc "/Makefile"))
                 #t))))))
      (synopsis "Compiler for the Rust programming language")
      (description "Rust is a systems programming language that provides memory
safety and thread safety guarantees.")
      (home-page "https://github.com/thepowersgang/mrustc")
      ;; Dual licensed.
      (license (list license:asl2.0 license:expat)))))

(define rust-1.19
  (package
    (name "rust")
    (version "1.19.0")
    (source
      (origin
        (method url-fetch)
        (uri (rust-uri "1.19.0"))
        (sha256 (base32 "0l8c14qsf42rmkqy92ahij4vf356dbyspxcips1aswpvad81y8qm"))
        (modules '((guix build utils)))
        (snippet '(begin (delete-file-recursively "src/llvm") #t))
        (patches (search-patches "rust-1.19-mrustc.patch"))))
    (outputs '("out" "cargo"))
    (properties '((timeout . 72000)               ;20 hours
                  (max-silent-time . 18000)))     ;5 hours (for armel)
    (arguments
     `(#:imported-modules ,%cargo-utils-modules ;for `generate-all-checksums'
       #:modules ((guix build utils) (ice-9 match) (guix build gnu-build-system))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'set-env
           (lambda* (#:key inputs #:allow-other-keys)
             ;; Disable test for cross compilation support.
             (setenv "CFG_DISABLE_CROSS_TESTS" "1")
             (setenv "SHELL" (which "sh"))
             (setenv "CONFIG_SHELL" (which "sh"))
             (setenv "CC" (string-append (assoc-ref inputs "gcc") "/bin/gcc"))
             ;; guix llvm-3.9.1 package installs only shared libraries
             (setenv "LLVM_LINK_SHARED" "1")
             #t))
         (add-after 'unpack 'patch-cargo-tomls
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (substitute* "src/librustc_errors/Cargo.toml"
               (("[[]dependencies[]]") "
[dependencies]
term = \"0.4.4\"
"))
             (substitute* "src/librustc/Cargo.toml"
               (("[[]dependencies[]]") "
[dependencies]
getopts = { path = \"../libgetopts\" }
"))
             (substitute* "src/librustdoc/Cargo.toml"
               (("[[]dependencies[]]") "
[dependencies]
test = { path = \"../libtest\" }
"))
             #t))
         (add-after 'unpack 'patch-tests
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((bash (assoc-ref inputs "bash")))
               (substitute* "src/libstd/process.rs"
                 ;; The newline is intentional.
                 ;; There's a line length "tidy" check in Rust which would
                 ;; fail otherwise.
                 (("\"/bin/sh\"") (string-append "\n\"" bash "/bin/sh\"")))
               (substitute* "src/libstd/net/tcp.rs"
                 ;; There is no network in build environment
                 (("fn connect_timeout_unroutable")
                  "#[ignore]\nfn connect_timeout_unroutable"))
               ;; <https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00222.html>
               (substitute* "src/libstd/sys/unix/process/process_common.rs"
                (("fn test_process_mask") "#[allow(unused_attributes)]
    #[ignore]
    fn test_process_mask"))
               #t)))
         (add-after 'patch-tests 'patch-aarch64-test
           (lambda* _
             (substitute* "src/librustc_back/dynamic_lib.rs"
               ;; This test is known to fail on aarch64 and powerpc64le:
               ;; https://github.com/rust-lang/rust/issues/45410
               (("fn test_loading_cosine") "#[ignore]\nfn test_loading_cosine"))
             #t))
         (add-after 'patch-tests 'use-readelf-for-tests
           (lambda* _
             ;; nm doesn't recognize the file format because of the
             ;; nonstandard sections used by the Rust compiler, but readelf
             ;; ignores them.
             (substitute* "src/test/run-make/atomic-lock-free/Makefile"
               (("\tnm ")
                "\treadelf -c "))
             #t))
         (add-after 'patch-tests 'remove-unsupported-tests
           (lambda* _
             ;; Our ld-wrapper cannot process non-UTF8 bytes in LIBRARY_PATH.
             ;; <https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00193.html>
             (delete-file-recursively "src/test/run-make/linker-output-non-utf8")
             #t))
         (add-after 'patch-source-shebangs 'patch-cargo-checksums
           (lambda* _
             (use-modules (guix build cargo-utils))
             (substitute* "src/Cargo.lock"
               (("(\"checksum .* = )\".*\"" all name)
                (string-append name "\"" ,%cargo-reference-hash "\"")))
             (generate-all-checksums "src/vendor")
             #t))
         ;; This phase is overridden by newer versions.
         (replace 'configure
           (const #t))
         ;; This phase is overridden by newer versions.
         (replace 'build
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let ((rustc-bootstrap (assoc-ref inputs "rustc-bootstrap")))
               (setenv "CFG_COMPILER_HOST_TRIPLE"
                ,(nix-system->gnu-triplet (%current-system)))
               (setenv "CFG_RELEASE" "")
               (setenv "CFG_RELEASE_CHANNEL" "stable")
               (setenv "CFG_LIBDIR_RELATIVE" "lib")
               (setenv "CFG_VERSION" "1.19.0-stable-mrustc")
               (setenv "MRUSTC_TARGET_VER" ,(version-major+minor version))
               ; bad: (setenv "CFG_PREFIX" "mrustc") ; FIXME output path.
               (mkdir-p "output")
               ;; mrustc 0.9 doesn't check the search paths for crates anymore.
               (copy-recursively (string-append rustc-bootstrap "/lib/mrust")
                                 "output")
               (invoke (string-append rustc-bootstrap "/tools/bin/minicargo")
                       "src/rustc" "--vendor-dir" "src/vendor"
                       "--output-dir" "output/rustc-build"
                       "-L" (string-append rustc-bootstrap "/lib/mrust")
                       "-j" "1")
               (setenv "CFG_COMPILER_HOST_TRIPLE" #f)
               (setenv "CFG_RELEASE" #f)
               (setenv "CFG_RELEASE_CHANNEL" #f)
               (setenv "CFG_VERSION" #f)
               (setenv "CFG_PREFIX" #f)
               (setenv "CFG_LIBDIR_RELATIVE" #f)
               (invoke (string-append rustc-bootstrap "/tools/bin/minicargo")
                       "src/tools/cargo" "--vendor-dir" "src/vendor"
                       "--output-dir" "output/cargo-build"
                       "-L" "output/"
                       "-L" (string-append rustc-bootstrap "/lib/mrust")
                       "-j" "1")
               ;; Now use the newly-built rustc to build the libraries.
               ;; One day that could be replaced by:
               ;; (invoke "output/cargo-build/cargo" "build"
               ;;         "--manifest-path" "src/bootstrap/Cargo.toml"
               ;;         "--verbose") ; "--locked" "--frozen"
               ;; but right now, Cargo has problems with libstd's circular
               ;; dependencies.
               (mkdir-p "output/target-libs")
               (for-each (match-lambda
                          ((name . flags)
                            (write name)
                            (newline)
                            (apply invoke
                                   "output/rustc-build/rustc"
                                   "-C" (string-append "linker="
                                                       (getenv "CC"))
                                   ;; Required for libterm.
                                   "-Z" "force-unstable-if-unmarked"
                                   "-L" "output/target-libs"
                                   (string-append "src/" name "/lib.rs")
                                   "-o"
                                   (string-append "output/target-libs/"
                                                  (car (string-split name #\/))
                                                  ".rlib")
                                   flags)))
                         '(("libcore")
                           ("libstd_unicode")
                           ("liballoc")
                           ("libcollections")
                           ("librand")
                           ("liblibc/src" "--cfg" "stdbuild")
                           ("libunwind" "-l" "gcc_s")
                           ("libcompiler_builtins")
                           ("liballoc_system")
                           ("libpanic_unwind")
                           ;; Uses "cc" to link.
                           ("libstd" "-l" "dl" "-l" "rt" "-l" "pthread")
                           ("libarena")

                           ;; Test dependencies:

                           ("libgetopts")
                           ("libterm")
                           ("libtest")))
               #t)))
         ;; This phase is overridden by newer versions.
         (replace 'check
           (const #t))
         ;; This phase is overridden by newer versions.
         (replace 'install
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (target-system ,(or (%current-target-system)
                                        (nix-system->gnu-triplet
                                         (%current-system))))
                    (out-libs (string-append out "/lib/rustlib/"
                                             target-system "/lib")))
                                        ;(setenv "CFG_PREFIX" out)
               (mkdir-p out-libs)
               (copy-recursively "output/target-libs" out-libs)
               (install-file "output/rustc-build/rustc"
                             (string-append out "/bin"))
               (install-file "output/rustc-build/rustdoc"
                             (string-append out "/bin"))
               (install-file "output/cargo-build/cargo"
                             (string-append (assoc-ref outputs "cargo")
                                            "/bin")))
             #t)))))
    (build-system gnu-build-system)
    (native-inputs
     `(("bison" ,bison) ; For the tests
       ("cmake" ,cmake-minimal)
       ("flex" ,flex) ; For the tests
       ("gdb" ,gdb)   ; For the tests
       ("procps" ,procps) ; For the tests
       ("python-2" ,python-2)
       ("rustc-bootstrap" ,mrustc)
       ("cargo-bootstrap" ,mrustc "cargo")
       ("pkg-config" ,pkg-config) ; For "cargo"
       ("which" ,which)))
    (inputs
     `(("jemalloc" ,jemalloc-4.5.0)
       ("llvm" ,llvm-3.9.1)
       ("openssl" ,openssl-1.0)
       ("libssh2" ,libssh2) ; For "cargo"
       ("libcurl" ,curl)))  ; For "cargo"

    ;; rustc invokes gcc, so we need to set its search paths accordingly.
    ;; Note: duplicate its value here to cope with circular dependencies among
    ;; modules (see <https://bugs.gnu.org/31392>).
    (native-search-paths
     (list (search-path-specification
            (variable "C_INCLUDE_PATH")
            (files '("include")))
           (search-path-specification
            (variable "CPLUS_INCLUDE_PATH")
            (files '("include/c++" "include")))
           (search-path-specification
            (variable "LIBRARY_PATH")
            (files '("lib" "lib64")))))

    (synopsis "Compiler for the Rust progamming language")
    (description "Rust is a systems programming language that provides memory
safety and thread safety guarantees.")
    (home-page "https://www.rust-lang.org")
    ;; Dual licensed.
    (license (list license:asl2.0 license:expat))))

(define-public rust-1.20
  (let ((base-rust
         (rust-bootstrapped-package rust-1.19 "1.20.0"
          "0542y4rnzlsrricai130mqyxl8r6rd991frb4qsnwb27yigqg91a")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (snippet '(begin
                      (delete-file-recursively "src/jemalloc")
                      (delete-file-recursively "src/llvm")
                      #t))
          (patches '())))
      (native-inputs
       `(;; The tests fail with newer versions of GNU Make.
         ("make" ,gnu-make-4.2)
         ,@(package-native-inputs base-rust)))
      (outputs '("out" "doc" "cargo"))
      ;; Since rust-1.19 is local, it's quite probable that Hydra
      ;; will build rust-1.19 only as a dependency of rust-1.20.
      ;; But then Hydra will use the wrong properties, the ones here,
      ;; for rust-1.19.  Therefore, we copied the properties of
      ;; rust-1.19 here.
      (properties '((timeout . 72000)               ;20 hours
                    (max-silent-time . 18000)))     ;5 hours (for armel)
      (arguments
       (substitute-keyword-arguments (package-arguments rust-1.19)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-tests 'patch-cargo-tests
               (lambda _
                 (substitute* "src/tools/cargo/tests/build.rs"
                  (("/usr/bin/env") (which "env"))
                  ;; Guix llvm is compiled without asmjs-unknown-emscripten.
                  (("fn wasm32_final_outputs") "#[ignore]\nfn wasm32_final_outputs"))
                 (substitute* "src/tools/cargo/tests/death.rs"
                  ;; This is stuck when built in container.
                  (("fn ctrl_c_kills_everyone") "#[ignore]\nfn ctrl_c_kills_everyone"))
                 ;; Prints test output in the wrong order when built on
                 ;; i686-linux.
                 (substitute* "src/tools/cargo/tests/test.rs"
                   (("fn cargo_test_env") "#[ignore]\nfn cargo_test_env"))

                 ;; These tests pull in a dependency on "git", which changes
                 ;; too frequently take part in the Rust toolchain.
                 (substitute* "src/tools/cargo/tests/new.rs"
                   (("fn author_prefers_cargo") "#[ignore]\nfn author_prefers_cargo")
                   (("fn finds_author_git") "#[ignore]\nfn finds_author_git")
                   (("fn finds_local_author_git") "#[ignore]\nfn finds_local_author_git"))
                 #t))
             (add-after 'patch-cargo-tests 'ignore-glibc-2.27-incompatible-test
               ;; https://github.com/rust-lang/rust/issues/47863
               (lambda _
                 (substitute* "src/test/run-pass/out-of-stack.rs"
                   (("// ignore-android") "// ignore-test\n// ignore-android"))
                 #t))
             (replace 'configure
               (lambda* (#:key inputs outputs #:allow-other-keys)
                 (let* ((out (assoc-ref outputs "out"))
                        (doc (assoc-ref outputs "doc"))
                        (gcc (assoc-ref inputs "gcc"))
                        (gdb (assoc-ref inputs "gdb"))
                        (binutils (assoc-ref inputs "binutils"))
                        (python (assoc-ref inputs "python-2"))
                        (rustc (assoc-ref inputs "rustc-bootstrap"))
                        (cargo (assoc-ref inputs "cargo-bootstrap"))
                        (llvm (assoc-ref inputs "llvm"))
                        (jemalloc (assoc-ref inputs "jemalloc")))
                   (call-with-output-file "config.toml"
                     (lambda (port)
                       (display (string-append "
[llvm]
[build]
cargo = \"" cargo "/bin/cargo" "\"
rustc = \"" rustc "/bin/rustc" "\"
docs = true
python = \"" python "/bin/python2" "\"
gdb = \"" gdb "/bin/gdb" "\"
vendor = true
submodules = false
[install]
prefix = \"" out "\"
docdir = \"" doc "/share/doc/rust" "\"
sysconfdir = \"etc\"
[rust]
default-linker = \"" gcc "/bin/gcc" "\"
channel = \"stable\"
rpath = true
" ;; There are 2 failed codegen tests:
;; codegen/mainsubprogram.rs and codegen/mainsubprogramstart.rs
;; These tests require a patched LLVM
"codegen-tests = false
[target." ,(nix-system->gnu-triplet-for-rust) "]
llvm-config = \"" llvm "/bin/llvm-config" "\"
cc = \"" gcc "/bin/gcc" "\"
cxx = \"" gcc "/bin/g++" "\"
ar = \"" binutils "/bin/ar" "\"
jemalloc = \"" jemalloc "/lib/libjemalloc_pic.a" "\"
[dist]
") port)))
                   #t)))
             (add-after 'configure 'provide-cc
               (lambda* (#:key inputs #:allow-other-keys)
                 (symlink (string-append (assoc-ref inputs "gcc") "/bin/gcc")
                          "/tmp/cc")
                 (setenv "PATH" (string-append "/tmp:" (getenv "PATH")))
                 #t))
             (add-after 'provide-cc 'configure-archiver
               (lambda* (#:key inputs #:allow-other-keys)
                 (substitute* "src/build_helper/lib.rs"
                  ;; Make sure "ar" is always used as the archiver.
                  (("\"musl\"") "\"\"")
                  ;; Then substitute "ar" by our name.
                  (("\"ar\"") (string-append "\""
                               (assoc-ref inputs "binutils")
                               "/bin/ar\"")))
                 #t))
             (delete 'patch-cargo-tomls)
             (add-before 'build 'reset-timestamps-after-changes
               (lambda* _
                 (for-each
                  (lambda (filename)
                    ;; Rust 1.20.0 treats timestamp 0 as "file doesn't exist".
                    ;; Therefore, use timestamp 1.
                    (utime filename 1 1 1 1))
                  (find-files "." #:directories? #t))
                 #t))
             (replace 'build
               (lambda* _
                 (invoke "./x.py" "build")
                 (invoke "./x.py" "build" "src/tools/cargo")))
             (replace 'check
               (lambda* _
                 ;; Disable parallel execution to prevent EAGAIN errors when
                 ;; running tests.
                 (invoke "./x.py" "-j1" "test" "-vv")
                 (invoke "./x.py" "-j1" "test" "src/tools/cargo")
                 #t))
             (replace 'install
               (lambda* (#:key outputs #:allow-other-keys)
                 (invoke "./x.py" "install")
                 (substitute* "config.toml"
                   ;; replace prefix to specific output
                   (("prefix = \"[^\"]*\"")
                    (string-append "prefix = \"" (assoc-ref outputs "cargo") "\"")))
                 (invoke "./x.py" "install" "cargo")))
             (add-after 'install 'delete-install-logs
               (lambda* (#:key outputs #:allow-other-keys)
                 (define (delete-manifest-file out-path file)
                   (delete-file (string-append out-path "/lib/rustlib/" file)))

                 (let ((out (assoc-ref outputs "out"))
                       (cargo-out (assoc-ref outputs "cargo")))
                   (for-each
                     (lambda (file) (delete-manifest-file out file))
                     `("install.log"
                       "manifest-rust-docs"
                       ,,(string-append "manifest-rust-std-"
                                        (nix-system->gnu-triplet-for-rust))
                       "manifest-rustc"))
                   (for-each
                     (lambda (file) (delete-manifest-file cargo-out file))
                     '("install.log"
                       "manifest-cargo"))
                   #t)))
             (add-after 'install 'wrap-rustc
               (lambda* (#:key inputs outputs #:allow-other-keys)
                 (let ((out (assoc-ref outputs "out"))
                       (libc (assoc-ref inputs "libc"))
                       (ld-wrapper (assoc-ref inputs "ld-wrapper")))
                   ;; Let gcc find ld and libc startup files.
                   (wrap-program (string-append out "/bin/rustc")
                     `("PATH" ":" prefix (,(string-append ld-wrapper "/bin")))
                     `("LIBRARY_PATH" ":" suffix (,(string-append libc "/lib"))))
                   #t))))))))))

(define-public rust-1.21
  (let ((base-rust (rust-bootstrapped-package rust-1.20 "1.21.0"
                    "1yj8lnxybjrybp00fqhxw8fpr641dh8wcn9mk44xjnsb4i1c21qp")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'configure 'remove-ar
               (lambda* (#:key inputs #:allow-other-keys)
                 ;; Remove because toml complains about "unknown field".
                 (substitute* "config.toml"
                  (("^ar =.*") "\n"))
                 #t)))))))))

(define-public rust-1.22
  (let ((base-rust (rust-bootstrapped-package rust-1.21 "1.22.1"
                    "1lrzzp0nh7s61wgfs2h6ilaqi6iq89f1pd1yaf65l87bssyl4ylb")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'unpack 'remove-flaky-test
               (lambda _
                 ;; See <https://github.com/rust-lang/rust/issues/43402>.
                 (when (file-exists? "src/test/run-make/issue-26092")
                   (delete-file-recursively "src/test/run-make/issue-26092"))
                 #t)))))))))

(define-public rust-1.23
  (let ((base-rust (rust-bootstrapped-package rust-1.22 "1.23.0"
                    "14fb8vhjzsxlbi6yrn1r6fl5dlbdd1m92dn5zj5gmzfwf4w9ar3l")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (delete 'configure-archiver)
             (delete 'remove-ar)
             (add-after 'unpack 'dont-build-native
               (lambda _
                 ;; XXX: Revisit this when we use gcc 6.
                 (substitute* "src/binaryen/CMakeLists.txt"
                  (("ADD_COMPILE_FLAG\\(\\\"-march=native\\\"\\)") ""))
                 #t)))))))))

(define-public rust-1.24
  (let ((base-rust
         (rust-bootstrapped-package rust-1.23 "1.24.1"
          "1vv10x2h9kq7fxh2v01damdq8pvlp5acyh1kzcda9sfjx12kv99y")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (delete 'use-readelf-for-tests)
             (replace 'patch-aarch64-test
               (lambda* _
                 (substitute* "src/librustc_metadata/dynamic_lib.rs"
                   ;; This test is known to fail on aarch64 and powerpc64le:
                   ;; https://github.com/rust-lang/rust/issues/45410
                   (("fn test_loading_cosine") "#[ignore]\nfn test_loading_cosine"))
                 #t)))))))))

;;; Rust 1.25 release support work with llvm 6--but build with llvm 6 is
;;; not determenistic due to <https://github.com/rust-lang/rust/issues/50556>.
;;; Keep using llvm 3.9.1 until builds become determenistic
(define-public rust-1.25
  (let ((base-rust
         (rust-bootstrapped-package rust-1.24 "1.25.0"
          "0baxjr99311lvwdq0s38bipbnj72pn6fgbk6lcq7j555xq53mxpf")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (snippet '(begin
                      (delete-file-recursively "src/jemalloc")
                      (delete-file-recursively "src/llvm")
                      (delete-file-recursively "src/llvm-emscripten")
                      #t))
          (patches (search-patches
                     "rust-1.25-accept-more-detailed-gdb-lines.patch"))))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-cargo-tests 'patch-cargo-index-update
               (lambda _
                 (substitute* "src/tools/cargo/tests/generate-lockfile.rs"
                   ;; This test wants to update the crate index.
                   (("fn no_index_update") "#[ignore]\nfn no_index_update"))
                 #t))
             (replace 'patch-aarch64-test
               (lambda _
                 (substitute* "src/librustc_metadata/dynamic_lib.rs"
                   ;; This test is known to fail on aarch64 and powerpc64le:
                   ;; https://github.com/rust-lang/rust/issues/45410
                   (("fn test_loading_cosine") "#[ignore]\nfn test_loading_cosine"))
                 ;; This test fails on aarch64 with llvm@6.0:
                 ;; https://github.com/rust-lang/rust/issues/49807
                 ;; other possible solution:
                 ;; https://github.com/rust-lang/rust/pull/47688
                 (delete-file "src/test/debuginfo/by-value-self-argument-in-trait-impl.rs")
                 #t))
             (delete 'ignore-glibc-2.27-incompatible-test))))))))

(define-public rust-1.26
  (let ((base-rust
         (rust-bootstrapped-package rust-1.25 "1.26.2"
          "0047ais0fvmqvngqkdsxgrzhb0kljg8wy85b01kbbjc88hqcz7pv")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (patches (search-patches
                     "rust-coresimd-doctest.patch"
                     "rust-1.25-accept-more-detailed-gdb-lines.patch"))))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             ;; binaryen was replaced with LLD project from LLVM
             (delete 'dont-build-native)
             (replace 'check
               (lambda* _
                 ;; Enable parallel execution.
                 (let ((parallel-job-spec
                        (string-append "-j" (number->string
                                             (min 4
                                                  (parallel-job-count))))))
                   (invoke "./x.py" parallel-job-spec "test" "-vv")
                   (invoke "./x.py" parallel-job-spec "test"
                           "src/tools/cargo"))))
             (replace 'remove-unsupported-tests
               (lambda* _
                 ;; Our ld-wrapper cannot process non-UTF8 bytes in LIBRARY_PATH.
                 ;; <https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00193.html>
                 (delete-file-recursively "src/test/run-make-fulldeps/linker-output-non-utf8")
                 #t))
             (replace 'patch-cargo-tests
               (lambda* _
                 (substitute* "src/tools/cargo/tests/testsuite/build.rs"
                   (("/usr/bin/env") (which "env"))
                   ;; Guix llvm is compiled without asmjs-unknown-emscripten.
                   (("fn wasm32_final_outputs") "#[ignore]\nfn wasm32_final_outputs"))
                 (substitute* "src/tools/cargo/tests/testsuite/death.rs"
                   ;; This is stuck when built in container.
                   (("fn ctrl_c_kills_everyone") "#[ignore]\nfn ctrl_c_kills_everyone"))
                 ;; Prints test output in the wrong order when built on
                 ;; i686-linux.
                 (substitute* "src/tools/cargo/tests/testsuite/test.rs"
                   (("fn cargo_test_env") "#[ignore]\nfn cargo_test_env"))

                 ;; Avoid dependency on "git".
                 (substitute* "src/tools/cargo/tests/testsuite/new.rs"
                   (("fn author_prefers_cargo") "#[ignore]\nfn author_prefers_cargo")
                   (("fn finds_author_git") "#[ignore]\nfn finds_author_git")
                   (("fn finds_local_author_git") "#[ignore]\nfn finds_local_author_git"))
                 #t))
             ;; TODO(rebuild-rust): Remove this phase in rust-1.28 when rebuilding.
             (add-after 'patch-cargo-tests 'disable-cargo-test-for-nightly-channel
               (lambda* _
                 ;; This test failed to work on "nightly" channel builds
                 ;; https://github.com/rust-lang/cargo/issues/5648
                 (substitute* "src/tools/cargo/tests/testsuite/resolve.rs"
                   (("fn test_resolving_minimum_version_with_transitive_deps")
                    "#[ignore]\nfn test_resolving_minimum_version_with_transitive_deps"))
                 #t))
             (replace 'patch-cargo-index-update
               (lambda* _
                 (substitute* "src/tools/cargo/tests/testsuite/generate_lockfile.rs"
                   ;; This test wants to update the crate index.
                   (("fn no_index_update") "#[ignore]\nfn no_index_update"))
                 #t)))))))))

(define-public rust-1.27
  (let ((base-rust
         (rust-bootstrapped-package rust-1.26 "1.27.2"
          "0pg1s37bhx9zqbynxyydq5j6q7kij9vxkcv8maz0m25prm88r0cs")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (patches (search-patches "rust-coresimd-doctest.patch"
                                   "rust-bootstrap-stage0-test.patch"
                                   "rust-1.25-accept-more-detailed-gdb-lines.patch"
                                   "rust-reproducible-builds.patch"))))
      (native-inputs
       ;; FIXME: Rust 1.27 and some later versions require GDB 8.2 specifically.
       ;; See <https://bugs.gnu.org/37810>.
       (alist-replace "gdb" (list gdb-8.2)
                      (package-native-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-before 'install 'mkdir-prefix-paths
               (lambda* (#:key outputs #:allow-other-keys)
                 ;; As result of https://github.com/rust-lang/rust/issues/36989
                 ;; `prefix' directory should exist before `install' call
                 (mkdir-p (assoc-ref outputs "out"))
                 (mkdir-p (assoc-ref outputs "cargo"))
                 #t))
             (add-after 'patch-cargo-tests 'disable-thinlto-test
               (lambda* _
                 ;; thinlto required llvm 6.0 for work
                 (substitute* "src/tools/cargo/tests/testsuite/path.rs"
                   (("fn thin_lto_works") "#[ignore]\nfn thin_lto_works"))
                 #t)))))))))

(define-public rust-1.28
  (let ((base-rust
         (rust-bootstrapped-package rust-1.27 "1.28.0"
          "11k4rn77bca2rikykkk9fmprrgjswd4x4kaq7fia08vgkir82nhx")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (patches (search-patches "rust-coresimd-doctest.patch"
                                   "rust-bootstrap-stage0-test.patch"
                                   "rust-1.25-accept-more-detailed-gdb-lines.patch"
                                   "rust-reproducible-builds.patch"))))
      (inputs
       ;; Use LLVM 6.0
       (alist-replace "llvm" (list llvm-6)
                      (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'configure 'enable-codegen-tests
               ;; Codegen tests should pass with llvm 6, so enable them.
               (lambda* _
                 (substitute* "config.toml"
                   (("codegen-tests = false") ""))
                 #t))
             (add-after 'patch-tests 'disable-amd64-avx-test
               ;; That test would fail on x86_64 machines without avx.
               (lambda* _
                 (substitute* "src/test/run-pass/issue-44056.rs"
                   (("only-x86_64") "ignore-test"))
                 #t))
             ;; The thinlto test should pass with llvm 6.
             (delete 'disable-thinlto-test))))))))

(define-public rust-1.29
  (let ((base-rust
         (rust-bootstrapped-package rust-1.28 "1.29.2"
          "1jb787080z754caa2w3w1amsygs4qlzj9rs1vy64firfmabfg22h")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (patches (search-patches "rust-1.25-accept-more-detailed-gdb-lines.patch"
                                   "rust-reproducible-builds.patch")))))))

(define-public rust-1.30
  (let ((base-rust
         (rust-bootstrapped-package rust-1.29 "1.30.1"
          "0aavdc1lqv0cjzbqwl5n59yd0bqdlhn0zas61ljf38yrvc18k8rn")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (snippet '(begin
                      (delete-file-recursively "src/jemalloc")
                      (delete-file-recursively "src/llvm")
                      (delete-file-recursively "src/llvm-emscripten")
                      (delete-file-recursively "src/tools/clang")
                      (delete-file-recursively "src/tools/lldb")
                      #t))))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-cargo-tests 'patch-cargo-env-shebang
               (lambda* (#:key inputs #:allow-other-keys)
                 (let ((coreutils (assoc-ref inputs "coreutils")))
                   (substitute* "src/tools/cargo/tests/testsuite/fix.rs"
                     ;; Cargo has a test which explicitly sets a
                     ;; RUSTC_WRAPPER environment variable which points
                     ;; to /usr/bin/env. Since it's not a shebang, it
                     ;; needs to be manually patched
                     (("\"/usr/bin/env\"")
                      (string-append "\"" coreutils "/bin/env\"")))
                   #t)))
             (add-after 'patch-cargo-env-shebang 'ignore-cargo-package-tests
               (lambda* _
                 (substitute* "src/tools/cargo/tests/testsuite/package.rs"
                   ;; These tests largely check that cargo outputs warning/error
                   ;; messages as expected. It seems that cargo outputs an
                   ;; absolute path to something in the store instead of the
                   ;; expected relative path (e.g. `[..]`) so we'll ignore
                   ;; these for now
                   (("fn include") "#[ignore]\nfn include")
                   (("fn exclude") "#[ignore]\nfn exclude"))
                   #t))
             ;; The test has been moved elsewhere.
             (replace 'disable-amd64-avx-test
               (lambda _
                 (substitute* "src/test/ui/run-pass/issues/issue-44056.rs"
                  (("only-x86_64") "ignore-test"))
                  #t)))))))))

(define (patch-command-exec-tests-phase test-path)
  "The command-exec.rs test moves around between releases.  We need to apply
a Guix-specific patch to it for each release.  This function generates the phase
that applies said patch, parametrized by the test-path.  This is done this way
because the phase is more complex than the equivalents for other tests that
move around."
 `(lambda* (#:key inputs #:allow-other-keys)
    (let ((coreutils (assoc-ref inputs "coreutils")))
      (substitute* ,test-path
        ;; This test suite includes some tests that the stdlib's
        ;; `Command` execution properly handles situations where
        ;; the environment or PATH variable are empty, but this
        ;; fails since we don't have `echo` available in the usual
        ;; Linux directories.
        ;; NB: the leading space is so we don't fail a tidy check
        ;; for trailing whitespace, and the newlines are to ensure
        ;; we don't exceed the 100 chars tidy check as well
        ((" Command::new\\(\"echo\"\\)")
         (string-append "\nCommand::new(\"" coreutils "/bin/echo\")\n")))
      #t)))

(define-public rust-1.31
  (let ((base-rust
         (rust-bootstrapped-package rust-1.30 "1.31.1"
          "0sk84ff0cklybcp0jbbxcw7lk7mrm6kb6km5nzd6m64dy0igrlli")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'patch-tests 'patch-command-exec-tests
               ,(patch-command-exec-tests-phase
                  "src/test/run-pass/command-exec.rs"))
             ;; The test has been moved elsewhere.
             (replace 'disable-amd64-avx-test
               (lambda _
                 (substitute* "src/test/ui/issues/issue-44056.rs"
                  (("only-x86_64") "ignore-test"))
                 #t))
             (add-after 'patch-tests 'patch-process-docs-rev-cmd
               (lambda* _
                 ;; Disable some doc tests which depend on the "rev" command
                 ;; https://github.com/rust-lang/rust/pull/58746
                 (substitute* "src/libstd/process.rs"
                   (("```rust") "```rust,no_run"))
                 #t)))))))))

(define-public rust-1.32
  (let ((base-rust
         (rust-bootstrapped-package rust-1.31 "1.32.0"
          "0ji2l9xv53y27xy72qagggvq47gayr5lcv2jwvmfirx029vlqnac")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (snippet '(begin (delete-file-recursively "src/llvm")
                           (delete-file-recursively "src/llvm-emscripten")
                           (delete-file-recursively "src/tools/clang")
                           (delete-file-recursively "src/tools/lldb")
                           (delete-file-recursively "vendor/jemalloc-sys/jemalloc")
                           #t))
          (patches (search-patches "rust-reproducible-builds.patch"))
          ;; the vendor directory has moved to the root of
          ;; the tarball, so we have to strip an extra prefix
          (patch-flags '("-p2"))))
      (inputs
       ;; Downgrade to LLVM 6, all LTO tests appear to fail with LLVM 7.0.1
       (alist-replace "llvm" (list llvm-6)
                      (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             ;; Cargo.lock and the vendor/ directory have been moved to the
             ;; root of the rust tarball
             (replace 'patch-cargo-checksums
               (lambda* _
                 (use-modules (guix build cargo-utils))
                 (substitute* "Cargo.lock"
                   (("(\"checksum .* = )\".*\"" all name)
                    (string-append name "\"" ,%cargo-reference-hash "\"")))
                 (generate-all-checksums "vendor")
                 #t))
             (add-after 'enable-codegen-tests 'override-jemalloc
               (lambda* (#:key inputs #:allow-other-keys)
                 ;; The compiler is no longer directly built against jemalloc,
                 ;; but rather via the jemalloc-sys crate (which vendors the
                 ;; jemalloc source). To use jemalloc we must enable linking to
                 ;; it (otherwise it would use the system allocator), and set
                 ;; an environment variable pointing to the compiled jemalloc.
                 (substitute* "config.toml"
                   (("^jemalloc =.*$") "")
                   (("[[]rust[]]") "\n[rust]\njemalloc=true\n"))
                 (setenv "JEMALLOC_OVERRIDE" (string-append (assoc-ref inputs "jemalloc")
                                                            "/lib/libjemalloc_pic.a"))
                 #t))
             ;; Remove no longer relevant steps
             (delete 'remove-flaky-test)
             (delete 'patch-aarch64-test))))))))

(define-public rust-1.33
  (let ((base-rust
         (rust-bootstrapped-package rust-1.32 "1.33.0"
           "152x91mg7bz4ygligwjb05fgm1blwy2i70s2j03zc9jiwvbsh0as")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (patches '())
          (patch-flags '("-p1"))))
      (inputs
       ;; Upgrade to jemalloc@5.1.0
       (alist-replace "jemalloc" (list jemalloc)
                      (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (delete 'ignore-cargo-package-tests)
             (add-after 'configure 'configure-test-threads
               ;; Several rustc and cargo tests will fail if run on one core
               ;; https://github.com/rust-lang/rust/issues/59122
               ;; https://github.com/rust-lang/cargo/issues/6746
               ;; https://github.com/rust-lang/rust/issues/58907
               (lambda* (#:key inputs #:allow-other-keys)
                 (setenv "RUST_TEST_THREADS" "2")
                 #t)))))))))

(define-public rust-1.34
  (let ((base-rust
         (rust-bootstrapped-package rust-1.33 "1.34.1"
           "19s09k7y5j6g3y4d2rk6kg9pvq6ml94c49w6b72dmq8p9lk8bixh")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (snippet '(begin
                      (delete-file-recursively "src/llvm-emscripten")
                      (delete-file-recursively "src/llvm-project")
                      (delete-file-recursively "vendor/jemalloc-sys/jemalloc")
                      #t)))))))

(define-public rust-1.35
  (let ((base-rust
         (rust-bootstrapped-package rust-1.34 "1.35.0"
           "0bbizy6b7002v1rdhrxrf5gijclbyizdhkglhp81ib3bf5x66kas")))
    (package
      (inherit base-rust)
      (inputs
       (alist-replace "llvm" (list llvm-8)
                      (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             ;; The tidy test includes a pass which ensures large binaries
             ;; don't accidentally get checked into the rust git repo.
             ;; Unfortunately the test assumes that git is always available,
             ;; so we'll comment out the invocation of this pass.
             (add-after 'configure 'disable-tidy-bins-check
               (lambda* _
                 (substitute* "src/tools/tidy/src/main.rs"
                   (("bins::check") "//bins::check"))
                 #t)))))))))

(define-public rust-1.36
  (let ((base-rust
         (rust-bootstrapped-package rust-1.35 "1.36.0"
           "06xv2p6zq03lidr0yaf029ii8wnjjqa894nkmrm6s0rx47by9i04")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (delete 'patch-process-docs-rev-cmd))))))))

(define-public rust-1.37
  (let ((base-rust
         (rust-bootstrapped-package rust-1.36 "1.37.0"
           "1hrqprybhkhs6d9b5pjskfnc5z9v2l2gync7nb39qjb5s0h703hj")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-before 'configure 'configure-cargo-home
               (lambda _
                 (let ((cargo-home (string-append (getcwd) "/.cargo")))
                   (mkdir-p cargo-home)
                   (setenv "CARGO_HOME" cargo-home)
                   #t))))))))))

;; TODO(rebuild-rust): Switch to LLVM 9 in 1.38 instead of 1.40.
(define-public rust-1.38
  (let ((base-rust
         (rust-bootstrapped-package rust-1.37 "1.38.0"
           "101dlpsfkq67p0hbwx4acqq6n90dj4bbprndizpgh1kigk566hk4")))
    (package
      (inherit base-rust)
      #;(inputs
        (alist-replace "llvm" (list llvm-9)
                       (package-inputs base-rust)))
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (replace 'patch-command-exec-tests
               ,(patch-command-exec-tests-phase
                  "src/test/ui/command-exec.rs"))
             (add-after 'patch-tests 'patch-command-uid-gid-test
               (lambda _
                 (substitute* "src/test/ui/command-uid-gid.rs"
                   (("/bin/sh") (which "sh"))
                   (("ignore-sgx") "ignore-sgx\n// ignore-tidy-linelength"))
                 #t)))))))))

(define-public rust-1.39
  (let ((base-rust
         (rust-bootstrapped-package rust-1.38 "1.39.0"
           "0mwkc1bnil2cfyf6nglpvbn2y0zfbv44zfhsd5qg4c9rm6vgd8dl")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:phases phases)
          `(modify-phases ,phases
             (replace 'patch-cargo-checksums
               ;; The Cargo.lock format changed.
               (lambda* _
                 (use-modules (guix build cargo-utils))
                 (substitute* "Cargo.lock"
                   (("(checksum = )\".*\"" all name)
                    (string-append name "\"" ,%cargo-reference-hash "\"")))
                 (generate-all-checksums "vendor")
                 #t)))))))))

(define-public rust-1.40
  (let ((base-rust
         (rust-bootstrapped-package rust-1.39 "1.40.0"
           "1ba9llwhqm49w7sz3z0gqscj039m53ky9wxzhaj11z6yg1ah15yx")))
    (package
      (inherit base-rust)
      (inputs
        (alist-replace "llvm" (list llvm-9)
                       (package-inputs base-rust)))
      (source
        (origin
          (inherit (package-source base-rust))
          ;; llvm-emscripten is no longer bundled, as that codegen backend
          ;; got removed.
          (snippet '(begin
                      (delete-file-recursively "src/llvm-project")
                      (delete-file-recursively "vendor/jemalloc-sys/jemalloc")
                      #t))))
      (arguments
       ;; Rust 1.40 does not ship rustc-internal libraries by default
       ;; (see rustc-dev-split). This means that librustc_driver.so is no
       ;; longer available in lib/rustlib/$target/lib, which is the directory
       ;; included in the runpath of librustc_codegen_llvm-llvm.so.
       ;; This is detected by our validate-runpath phase as an error, but it
       ;; is harmless as the codegen backend is loaded by librustc_driver.so
       ;; itself, which must at that point have been already loaded.
       ;; As such, we skip validating the runpath for Rust 1.40.
       ;; Rust 1.41 stopped putting the codegen backend in a separate library,
       ;; which makes this workaround only necessary for this release.
       (cons* #:validate-runpath? #f
         (substitute-keyword-arguments (package-arguments base-rust)
           ((#:phases phases)
            `(modify-phases ,phases
               ;; We often need to patch tests with various Guix-specific paths.
               ;; This often increases the line length and makes tidy, rustc's
               ;; style checker, complain. We could insert additional newlines
               ;; or add an "// ignore-tidy-linelength" comment, but as an
               ;; ignore comment must be used, both approaches are fragile due
               ;; to upstream formatting changes. As such, disable running the
               ;; linter during tests, since it's intended for rustc developers
               ;; anyway.
               ;;
               ;; TODO(rebuild-rust): This phase could be added earlier to
               ;; simplify a significant amount of code, but it would require
               ;; rebuilding the entire rusty universe.
               (add-after 'patch-tests 'neuter-tidy
                 (lambda _
                   (substitute* "src/bootstrap/builder.rs"
                     (("^.*::Tidy,") ""))
                   #t))
               ;; TODO(rebuild-rust): Adapt the find-files approach for
               ;; earlier testsuite patches.
               (replace 'patch-command-uid-gid-test
                 (lambda _
                   (match (find-files "src/test" "command-uid-gid\\.rs")
                     ((file)
                      (substitute* file
                        (("/bin/sh") (which "sh")))))
                   #t))
               (replace 'patch-command-exec-tests
                 ,(patch-command-exec-tests-phase
                    '(match (find-files "src/test" "command-exec\\.rs")
                       ((file) file))))
               ;; TODO(rebuild-rust): The test in question got fixed long ago.
               (delete 'disable-cargo-test-for-nightly-channel)
               ;; The test got removed in commit 000fe63b6fc57b09828930cacbab20c2ee6e6d15
               ;; "Remove painful test that is not pulling its weight"
               (delete 'remove-unsupported-tests)))))))))

(define-public rust-1.41
  (let ((base-rust
         (rust-bootstrapped-package rust-1.40 "1.41.1"
           "0ws5x0fxv57fyllsa6025h3q6j9v3m8nb3syl4x0hgkddq0kvj9q")))
    (package
      (inherit base-rust)
      (arguments
       (substitute-keyword-arguments (package-arguments base-rust)
         ((#:validate-runpath? _) #t))))))

(define-public rust-1.42
  (rust-bootstrapped-package rust-1.41 "1.42.0"
    "0x9lxs82may6c0iln0b908cxyn1cv7h03n5cmbx3j1bas4qzks6j"))

(define-public rust-1.43
  (rust-bootstrapped-package rust-1.42 "1.43.0"
    "18akhk0wz1my6y9vhardriy2ysc482z0fnjdcgs9gy59kmnarxkm"))

(define-public rust-1.44
  (rust-bootstrapped-package rust-1.43 "1.44.1"
    "0ww4z2v3gxgn3zddqzwqya1gln04p91ykbrflnpdbmcd575n8bky"))

(define-public rust-1.45
  (let ((base-rust
         (rust-bootstrapped-package rust-1.44 "1.45.2"
           "0273a1g3f59plyi1n0azf21qjzwml1yqdnj5z472crz37qggr8xp")))
    (package
      (inherit base-rust)
      (source
        (origin
          (inherit (package-source base-rust))
          (patches (search-patches "rust-1.45-linker-locale.patch"))))
      (inputs
        (alist-replace "llvm" (list llvm-10)
                       (package-inputs base-rust)))
      (arguments
        (substitute-keyword-arguments (package-arguments base-rust)
          ((#:phases phases)
           `(modify-phases ,phases
              ;; These tests make sure that the parser behaves properly when
              ;; a source file starts with a shebang. Unfortunately,
              ;; the patch-shebangs phase changes the meaning of these edge-cases.
              ;; We skip the test since it's drastically unlikely Guix's packaging
              ;; will introduce a bug here.
              (add-after 'patch-tests 'skip-shebang-tests
                (lambda _
                  (with-directory-excursion "src/test/ui/parser/shebang"
                    (delete-file "shebang-doc-comment.rs")
                    (delete-file "sneaky-attrib.rs")
                    #t)))
              ;; This test case synchronizes itself by starting a localhost TCP
              ;; server. This doesn't work as networking is not available.
              (add-after 'patch-tests 'skip-networking-test
                (lambda _
                  (substitute* "src/tools/cargo/tests/testsuite/freshness.rs"
                    (("fn linking_interrupted" all)
                     (string-append "#[ignore] " all)))
                 #t)))))))))

;; TODO(staging): Bump this variable to the latest packaged rust.
(define-public rust rust-1.39)