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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Petter <petter@mykolab.ch>
;;; Copyright © 2017 Leo Famulari <leo@famulari.name>
;;; 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 (guix build-system go)
#:use-module (guix utils)
#:use-module (guix derivations)
#:use-module (guix search-paths)
#:use-module (guix build-system)
#:use-module (guix build-system gnu)
#:use-module (guix packages)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:export (%go-build-system-modules
go-build
go-build-system
go-pseudo-version?
go-version->git-ref))
;; Commentary:
;;
;; Standard build procedure for packages using the Go build system. It is
;; implemented as an extension of 'gnu-build-system'.
;;
;; Code:
(define %go-pseudo-version-rx
;; Match only the end of the version string; this is so that matching the
;; more complex leading semantic version pattern is not required.
(make-regexp (string-append
"([0-9]{14}-)" ;timestamp
"([0-9A-Fa-f]{12})" ;commit hash
"(\\+incompatible)?$"))) ;optional +incompatible tag
(define (go-version->git-ref version)
"Parse VERSION, a \"pseudo-version\" as defined at
<https://golang.org/ref/mod#pseudo-versions>, and extract the commit hash from
it, defaulting to full VERSION (stripped from the \"+incompatible\" suffix if
present) if a pseudo-version pattern is not recognized."
;; A module version like v1.2.3 is introduced by tagging a revision in the
;; underlying source repository. Untagged revisions can be referred to
;; using a "pseudo-version" like v0.0.0-yyyymmddhhmmss-abcdefabcdef, where
;; the time is the commit time in UTC and the final suffix is the prefix of
;; the commit hash (see: https://golang.org/ref/mod#pseudo-versions).
(let* ((version
;; If a source code repository has a v2.0.0 or later tag for a file
;; tree with no go.mod, the version is considered to be part of the
;; v1 module's available versions and is given an +incompatible
;; suffix
;; (see:https://golang.org/cmd/go/#hdr-Module_compatibility_and_semantic_versioning).
(if (string-suffix? "+incompatible" version)
(string-drop-right version 13)
version))
(match (regexp-exec %go-pseudo-version-rx version)))
(if match
(match:substring match 2)
version)))
(define (go-pseudo-version? version)
"True if VERSION is a Go pseudo-version, i.e., a version string made of a
commit hash and its date rather than a proper release tag."
(regexp-exec %go-pseudo-version-rx version))
(define %go-build-system-modules
;; Build-side modules imported and used by default.
`((guix build go-build-system)
(guix build union)
,@%gnu-build-system-modules))
(define (default-go)
;; Lazily resolve the binding to avoid a circular dependency.
(let ((go (resolve-interface '(gnu packages golang))))
(module-ref go 'go)))
(define* (lower name
#:key source inputs native-inputs outputs system target
(go (default-go))
#:allow-other-keys
#:rest arguments)
"Return a bag for NAME."
(define private-keywords
'(#:source #:target #:go #:inputs #:native-inputs))
(and (not target) ;XXX: no cross-compilation
(bag
(name name)
(system system)
(host-inputs `(,@(if source
`(("source" ,source))
'())
,@inputs
;; Keep the standard inputs of 'gnu-build-system'.
,@(standard-packages)))
(build-inputs `(("go" ,go)
,@native-inputs))
(outputs outputs)
(build go-build)
(arguments (strip-keyword-arguments private-keywords arguments)))))
(define* (go-build store name inputs
#:key
(phases '(@ (guix build go-build-system)
%standard-phases))
(outputs '("out"))
(search-paths '())
(install-source? #t)
(import-path "")
(unpack-path "")
(build-flags ''())
(tests? #t)
(allow-go-reference? #f)
(system (%current-system))
(guile #f)
(imported-modules %go-build-system-modules)
(modules '((guix build go-build-system)
(guix build union)
(guix build utils))))
(define builder
`(begin
(use-modules ,@modules)
(go-build #:name ,name
#:source ,(match (assoc-ref inputs "source")
(((? derivation? source))
(derivation->output-path source))
((source)
source)
(source
source))
#:system ,system
#:phases ,phases
#:outputs %outputs
#:search-paths ',(map search-path-specification->sexp
search-paths)
#:install-source? ,install-source?
#:import-path ,import-path
#:unpack-path ,unpack-path
#:build-flags ,build-flags
#:tests? ,tests?
#:allow-go-reference? ,allow-go-reference?
#:inputs %build-inputs)))
(define guile-for-build
(match guile
((? package?)
(package-derivation store guile system #:graft? #f))
(#f ; the default
(let* ((distro (resolve-interface '(gnu packages commencement)))
(guile (module-ref distro 'guile-final)))
(package-derivation store guile system
#:graft? #f)))))
(build-expression->derivation store name builder
#:inputs inputs
#:system system
#:modules imported-modules
#:outputs outputs
#:guile-for-build guile-for-build))
(define go-build-system
(build-system
(name 'go)
(description
"Build system for Go programs")
(lower lower)))
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