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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>
;;; Copyright © 2019 Ivan Petkov <ivanppetkov@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 (guix build cargo-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 (json parser)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (%standard-phases
cargo-build))
;; Commentary:
;;
;; Builder-side code of the standard Rust package build procedure.
;;
;; Code:
(define (manifest-targets)
"Extract all targets from the Cargo.toml manifest"
(let* ((port (open-input-pipe "cargo read-manifest"))
(data (json->scm port))
(targets (hash-ref data "targets" '())))
(close-port port)
targets))
(define (has-executable-target?)
"Check if the current cargo project declares any binary targets."
(let* ((bin? (lambda (kind) (string=? kind "bin")))
(get-kinds (lambda (dep) (hash-ref dep "kind")))
(bin-dep? (lambda (dep) (find bin? (get-kinds dep)))))
(find bin-dep? (manifest-targets))))
(define (crate-src? path)
"Check if PATH refers to a crate source, namely a gzipped tarball with a
Cargo.toml file present at its root."
(and (gzip-file? path)
;; First we print out all file names within the tarball to see if it
;; looks like the source of a crate. However, the tarball will include
;; an extra path component which we would like to ignore (since we're
;; interested in checking if a Cargo.toml exists at the root of the
;; archive, but not nested anywhere else). We do this by cutting up
;; each output line and only looking at the second component. We then
;; check if it matches Cargo.toml exactly and short circuit if it does.
(zero? (apply system* (list "sh" "-c"
(string-append "tar -tf " path
" | cut -d/ -f2"
" | grep -q '^Cargo.toml$'"))))))
(define* (configure #:key inputs
(vendor-dir "guix-vendor")
#:allow-other-keys)
"Vendor Cargo.toml dependencies as guix inputs."
(chmod "." #o755)
;; 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-p vendor-dir)
(for-each
(match-lambda
((name . path)
(let* ((basepath (basename path))
(crate-dir (string-append vendor-dir "/" basepath)))
(and (crate-src? path)
;; Gracefully handle duplicate inputs
(not (file-exists? crate-dir))
(mkdir-p crate-dir)
;; Cargo crates are simply gzipped tarballs but with a .crate
;; extension. We expand the source to a directory name we control
;; so that we can generate any cargo checksums.
;; The --strip-components argument is needed to prevent creating
;; an extra directory within `crate-dir`.
(invoke "tar" "xvf" path "-C" crate-dir "--strip-components" "1")
(generate-checksums crate-dir)))))
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]
replace-with = 'vendored-sources'
[source.vendored-sources]
directory = '" port)
(display (string-append (getcwd) "/" vendor-dir) port)
(display "'
" port)
(close-port port))
;; Lift restriction on any lints: a crate author may have decided to opt
;; into stricter lints (e.g. #![deny(warnings)]) during their own builds
;; but we don't want any build failures that could be caused later by
;; upgrading the compiler for example.
(setenv "RUSTFLAGS" "--cap-lints allow")
(setenv "CC" (string-append (assoc-ref inputs "gcc") "/bin/gcc"))
#t)
(define* (build #:key
skip-build?
(cargo-build-flags '("--release"))
#:allow-other-keys)
"Build a given Cargo package."
(or skip-build?
(zero? (apply system* `("cargo" "build" ,@cargo-build-flags)))))
(define* (check #:key
tests?
(cargo-test-flags '("--release"))
#:allow-other-keys)
"Run tests for a given Cargo package."
(if tests?
(zero? (apply system* `("cargo" "test" ,@cargo-test-flags)))
#t))
(define (touch file-name)
(call-with-output-file file-name (const #t)))
(define* (install-source #:key inputs outputs #:allow-other-keys)
"Install the source for 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
;; vendoring the crates' sources by symlinking them
;; to store paths.
(copy-recursively "." rsrc)
(touch (string-append rsrc "/.cargo-ok"))
(generate-checksums rsrc)
(install-file "Cargo.toml" rsrc)
#t))
(define* (install #:key inputs outputs skip-build? #:allow-other-keys)
"Install a given Cargo package."
(let* ((out (assoc-ref outputs "out")))
(mkdir-p out)
;; Make cargo reuse all the artifacts we just built instead
;; of defaulting to making a new temp directory
(setenv "CARGO_TARGET_DIR" "./target")
;; Force cargo to honor our .cargo/config definitions
;; https://github.com/rust-lang/cargo/issues/6397
(setenv "CARGO_HOME" ".")
;; Only install crates which include binary targets,
;; otherwise cargo will raise an error.
(or skip-build?
(not (has-executable-target?))
(zero? (system* "cargo" "install" "--path" "." "--root" out)))))
(define %standard-phases
(modify-phases gnu:%standard-phases
(delete 'bootstrap)
(add-before 'configure 'install-source install-source)
(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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