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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016, 2018 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2019 Björn Höfling <bjoern.hoefling@bjoernhoefling.de>
;;; Copyright © 2020, 2022 Hartmut Goebel <h.goebel@crazy-compilers.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 rebar-build-system)
#:use-module ((guix build gnu-build-system) #:prefix gnu:)
#:use-module ((guix build utils) #:hide (delete))
#:use-module (ice-9 match)
#:use-module (ice-9 ftw)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (rebar-build
%standard-phases))
;;
;; Builder-side code of the standard build procedure for Erlang packages using
;; rebar3.
;;
;; TODO: Think about whether bindir ("ebin"), libdir ("priv") and includedir
;; "(include") need to be configurable
(define %erlang-libdir "/lib/erlang/lib")
(define* (erlang-depends #:key inputs #:allow-other-keys)
(define input-directories
(match inputs
(((_ . dir) ...)
dir)))
(mkdir-p "_checkouts")
(for-each
(lambda (input-dir)
(let ((elibdir (string-append input-dir %erlang-libdir)))
(when (directory-exists? elibdir)
(for-each
(lambda (dirname)
(let ((dest (string-append elibdir "/" dirname))
(link (string-append "_checkouts/" dirname)))
(when (not (file-exists? link))
;; RETHINK: Maybe better copy and make writable to avoid some
;; error messages e.g. when using with rebar3-git-vsn.
(symlink dest link))))
(list-directories elibdir)))))
input-directories))
(define* (unpack #:key source #:allow-other-keys)
"Unpack SOURCE in the working directory, and change directory within the
source. When SOURCE is a directory, copy it in a sub-directory of the current
working directory."
(let ((gnu-unpack (assoc-ref gnu:%standard-phases 'unpack)))
(gnu-unpack #:source source)
;; Packages from hex.pm typically have a contents.tar.gz containing the
;; actual source. If this tar file exists, extract it.
(when (file-exists? "contents.tar.gz")
(invoke "tar" "xvf" "contents.tar.gz"))))
(define* (build #:key (rebar-flags '()) #:allow-other-keys)
(apply invoke `("rebar3" "compile" ,@rebar-flags)))
(define* (check #:key target (rebar-flags '()) (tests? (not target))
(test-target "eunit")
#:allow-other-keys)
(if tests?
(apply invoke `("rebar3" ,test-target ,@rebar-flags))
(format #t "test suite not run~%")))
(define (erlang-package? name)
"Check if NAME correspond to the name of an Erlang package."
(string-prefix? "erlang-" name))
(define (package-name-version->erlang-name name+ver)
"Convert the Guix package NAME-VER to the corresponding Erlang name-version
format. Essentially drop the prefix used in Guix and replace dashes by
underscores."
(let* ((name- (package-name->name+version name+ver)))
(string-join
(string-split
(if (erlang-package? name-) ; checks for "erlang-" prefix
(string-drop name- (string-length "erlang-"))
name-)
#\-)
"_")))
(define (list-directories directory)
"Return file names of the sub-directory of DIRECTORY."
(scandir directory
(lambda (file)
(and (not (member file '("." "..")))
(file-is-directory? (string-append directory "/" file))))))
(define* (install #:key name outputs
(install-name (package-name-version->erlang-name name))
(install-profile "default") ; build profile outputs to install
#:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(pkg-dir (string-append out %erlang-libdir "/" install-name)))
(let ((bin-dir (string-append "_build/" install-profile "/bin"))
(lib-dir (string-append "_build/" install-profile "/lib")))
;; install _build/PROFILE/bin
(when (file-exists? bin-dir)
(copy-recursively bin-dir out #:follow-symlinks? #t))
;; install _build/PROFILE/lib/*/{ebin,include,priv}
(for-each
(lambda (*)
(for-each
(lambda (dirname)
(let ((src-dir (string-append lib-dir "/" * "/" dirname))
(dst-dir (string-append pkg-dir "/" dirname)))
(when (file-exists? src-dir)
(copy-recursively src-dir dst-dir #:follow-symlinks? #t))
(false-if-exception
(delete-file (string-append dst-dir "/.gitignore")))))
'("ebin" "include" "priv")))
(list-directories lib-dir))
(false-if-exception
(delete-file (string-append pkg-dir "/priv/Run-eunit-loop.expect"))))))
(define %standard-phases
(modify-phases gnu:%standard-phases
(replace 'unpack unpack)
(delete 'bootstrap)
(delete 'configure)
(add-before 'build 'erlang-depends erlang-depends)
(replace 'build build)
(replace 'check check)
(replace 'install install)))
(define* (rebar-build #:key inputs (phases %standard-phases)
#:allow-other-keys #:rest args)
"Build the given Erlang package, applying all of PHASES in order."
(apply gnu:gnu-build #:inputs inputs #:phases phases args))
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