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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;;
;;; 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 build cargo-build-system)
#:use-module ((guix build gnu-build-system) #:prefix gnu:)
#:use-module (guix build utils)
#:use-module (ice-9 popen)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 ftw)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (%standard-phases
cargo-build
generate-checksums))
;; Commentary:
;;
;; Builder-side code of the standard Rust package build procedure.
;;
;; Code:
;; FIXME: Needs to be parsed from url not package name.
(define (package-name->crate-name name)
"Return the crate name of NAME."
(match (string-split name #\-)
(("rust" rest ...)
(string-join rest "-"))
(_ #f)))
(define* (configure #:key inputs #:allow-other-keys)
"Replace Cargo.toml [dependencies] section with guix inputs."
;; Make sure Cargo.toml is writeable when the crate uses git-fetch.
(chmod "Cargo.toml" #o644)
(chmod "." #o755)
(if (not (file-exists? "vendor"))
(if (not (file-exists? "Cargo.lock"))
(begin
(substitute* "Cargo.toml"
((".*32-sys.*") "
")
((".*winapi.*") "
")
((".*core-foundation.*") "
"))
;; Prepare one new directory with all the required dependencies.
;; It's necessary to do this (instead of just using /gnu/store as the
;; directory) because we want to hide the libraries in subdirectories
;; share/rust-source/... instead of polluting the user's profile root.
(mkdir "vendor")
(for-each
(match-lambda
((name . path)
(let ((crate (package-name->crate-name name)))
(when (and crate path)
(match (string-split (basename path) #\-)
((_ ... version)
(symlink (string-append path "/share/rust-source")
(string-append "vendor/" (basename path)))))))))
inputs)
;; Configure cargo to actually use this new directory.
(mkdir-p ".cargo")
(let ((port (open-file ".cargo/config" "w" #:encoding "utf-8")))
(display "
[source.crates-io]
registry = 'https://github.com/rust-lang/crates.io-index'
replace-with = 'vendored-sources'
[source.vendored-sources]
directory = '" port)
(display (getcwd) port)
(display "/vendor" port)
(display "'
" port)
(close-port port)))))
(setenv "CC" (string-append (assoc-ref inputs "gcc") "/bin/gcc"))
;(setenv "CARGO_HOME" "/gnu/store")
; (setenv "CMAKE_C_COMPILER" cc)
#t)
(define* (build #:key (cargo-build-flags '("--release"))
#:allow-other-keys)
"Build a given Cargo package."
(zero? (apply system* `("cargo" "build" ,@cargo-build-flags))))
(define* (check #:key tests? #:allow-other-keys)
"Run tests for a given Cargo package."
(if (and tests? (file-exists? "Cargo.lock"))
(zero? (system* "cargo" "test"))
#t))
(define (file-sha256 file-name)
"Calculate the hexdigest of the sha256 checksum of FILE-NAME and return it."
(let ((port (open-pipe* OPEN_READ
"sha256sum"
"--"
file-name)))
(let ((result (read-delimited " " port)))
(close-pipe port)
result)))
(define (generate-checksums dir-name src-name)
"Given DIR-NAME, a store directory, checksum all the files in it one
by one and put the result into the file \".cargo-checksum.json\" in
the same directory. Also includes the checksum of an extra file
SRC-NAME as if it was part of the directory DIR-NAME with name
\"package\"."
(let* ((file-names (find-files dir-name "."))
(dir-prefix-name (string-append dir-name "/"))
(dir-prefix-name-len (string-length dir-prefix-name))
(checksums-file-name (string-append dir-name "/.cargo-checksum.json")))
(call-with-output-file checksums-file-name
(lambda (port)
(display "{\"files\":{" port)
(let ((sep ""))
(for-each (lambda (file-name)
(let ((file-relative-name (string-drop file-name dir-prefix-name-len)))
(display sep port)
(set! sep ",")
(write file-relative-name port)
(display ":" port)
(write (file-sha256 file-name) port))) file-names))
(display "},\"package\":" port)
(write (file-sha256 src-name) port)
(display "}" port)))))
(define (touch file-name)
(call-with-output-file file-name (const #t)))
(define* (install #:key inputs outputs #:allow-other-keys)
"Install a given Cargo package."
(let* ((out (assoc-ref outputs "out"))
(src (assoc-ref inputs "source"))
(rsrc (string-append (assoc-ref outputs "src")
"/share/rust-source")))
(mkdir-p rsrc)
;; Rust doesn't have a stable ABI yet. Because of this
;; Cargo doesn't have a search path for binaries yet.
;; Until this changes we are working around this by
;; distributing crates as source and replacing
;; references in Cargo.toml with store paths.
(copy-recursively "src" (string-append rsrc "/src"))
(touch (string-append rsrc "/.cargo-ok"))
(generate-checksums rsrc src)
(install-file "Cargo.toml" rsrc)
;; When the package includes executables we install
;; it using cargo install. This fails when the crate
;; doesn't contain an executable.
(if (file-exists? "Cargo.lock")
(zero? (system* "cargo" "install" "--root" out))
(begin
(mkdir out)
#t))))
(define %standard-phases
(modify-phases gnu:%standard-phases
(replace 'configure configure)
(replace 'build build)
(replace 'check check)
(replace 'install install)))
(define* (cargo-build #:key inputs (phases %standard-phases)
#:allow-other-keys #:rest args)
"Build the given Cargo package, applying all of PHASES in order."
(apply gnu:gnu-build #:inputs inputs #:phases phases args))
;;; cargo-build-system.scm ends here
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