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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2016 Steve Sprang <scs@stevesprang.com>
+;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
+;;; Copyright © 2016 Pjotr Prins <pjotr.public12@thebird.nl>
+;;;
+;;; 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 erlang)
+ #:use-module ((guix licenses) #:prefix license:)
+ #:use-module (guix build-system gnu)
+ #:use-module (guix download)
+ #:use-module (guix packages)
+ #:use-module (gnu packages autotools)
+ #:use-module (gnu packages fontutils)
+ #:use-module (gnu packages gl)
+ #:use-module (gnu packages ncurses)
+ #:use-module (gnu packages perl)
+ #:use-module (gnu packages tls)
+ #:use-module (gnu packages wxwidgets))
+
+(define-public erlang
+ (package
+ (name "erlang")
+ ;; When updating, remember to update the hash of erlang-manpages!
+ (version "19.0")
+ (source (origin
+ (method url-fetch)
+ ;; The tarball from http://erlang.org/download contains many
+ ;; pre-compiled files, so we use this snapshot of the source
+ ;; repository.
+ (uri (string-append "https://github.com/erlang/otp/archive/OTP-"
+ version ".tar.gz"))
+ (file-name (string-append name "-" version ".tar.gz"))
+ (sha256
+ (base32
+ "1dxyz6x1yfv33fd0xfry2ihylkyfa2d655q1vxvbz8dflyd64yqh"))))
+ (build-system gnu-build-system)
+ (native-inputs
+ `(("perl" ,perl)
+ ("autoconf" ,autoconf)
+ ("automake" ,automake)
+
+ ;; Erlang's documentation is distributed in a separate tarball.
+ ("erlang-manpages"
+ ,(origin
+ (method url-fetch)
+ (uri (string-append "http://erlang.org/download/otp_doc_man_"
+ version ".tar.gz"))
+ (sha256
+ (base32
+ "07j0l7ary936hil38xr3hvfw6j74pshkyyi98kc9cassbbcdd8y7"))))))
+ (inputs
+ `(("ncurses" ,ncurses)
+ ("openssl" ,openssl)
+ ("wxwidgets" ,wxwidgets)))
+ (propagated-inputs
+ `(("fontconfig" ,fontconfig)
+ ("glu" ,glu)
+ ("mesa" ,mesa)))
+ (arguments
+ `(#:test-target "release_tests"
+ #:configure-flags
+ (list "--disable-saved-compile-time"
+ "--enable-dynamic-ssl-lib"
+ "--enable-native-libs"
+ "--enable-shared-zlib"
+ "--enable-smp-support"
+ "--enable-threads"
+ "--enable-wx"
+ (string-append "--with-ssl=" (assoc-ref %build-inputs "openssl")))
+ #:modules ((srfi srfi-19) ; make-time, et cetera.
+ (guix build utils)
+ (guix build gnu-build-system))
+ #:phases
+ (modify-phases %standard-phases
+ ;; The are several code fragments that embed timestamps into the
+ ;; output. Here, we alter those fragments to use the value of
+ ;; SOURCE_DATE_EPOCH instead.
+ (add-after 'unpack 'remove-timestamps
+ (lambda _
+ (let ((source-date-epoch
+ (time-utc->date
+ (make-time time-utc 0 (string->number
+ (getenv "SOURCE_DATE_EPOCH"))))))
+ (substitute* "lib/reltool/src/reltool_target.erl"
+ (("Date = date\\(\\),")
+ (string-append "Date = "
+ (date->string source-date-epoch
+ "'{~Y,~m,~d}',"))))
+ (substitute* "lib/reltool/src/reltool_target.erl"
+ (("Time = time\\(\\),")
+ (string-append "Time = "
+ (date->string source-date-epoch
+ "'{~H,~M,~S}',"))))
+ (substitute* '("lib/reltool/src/reltool_target.erl"
+ "lib/sasl/src/systools_make.erl")
+ (("date\\(\\), time\\(\\),")
+ (date->string source-date-epoch
+ "{~Y,~m,~d}, {~H,~M,~S},")))
+ (substitute* '("lib/dialyzer/test/small_SUITE_data/src/gs_make.erl"
+ "lib/gs/src/gs_make.erl")
+ (("tuple_to_list\\(date\\(\\)\\),tuple_to_list\\(time\\(\\)\\)")
+ (date->string
+ source-date-epoch
+ "tuple_to_list({~Y,~m,~d}), tuple_to_list({~H,~M,~S})")))
+ (substitute* "lib/snmp/src/compile/snmpc_mib_to_hrl.erl"
+ (("\\{Y,Mo,D\\} = date\\(\\),")
+ (date->string source-date-epoch
+ "{Y,Mo,D} = {~Y,~m,~d},")))
+ (substitute* "lib/snmp/src/compile/snmpc_mib_to_hrl.erl"
+ (("\\{H,Mi,S\\} = time\\(\\),")
+ (date->string source-date-epoch
+ "{H,Mi,S} = {~H,~M,~S},"))))))
+ (add-after 'patch-source-shebangs 'patch-source-env
+ (lambda _
+ (let ((escripts
+ (append
+ (find-files "." "\\.escript")
+ (find-files "lib/stdlib/test/escript_SUITE_data/")
+ '("erts/lib_src/utils/make_atomics_api"
+ "erts/preloaded/src/add_abstract_code"
+ "lib/diameter/bin/diameterc"
+ "lib/reltool/examples/display_args"
+ "lib/reltool/examples/mnesia_core_dump_viewer"
+ "lib/snmp/src/compile/snmpc.src"
+ "make/verify_runtime_dependencies"
+ "make/emd2exml.in"))))
+ (substitute* escripts
+ (("/usr/bin/env") (which "env"))))))
+ (add-before 'configure 'set-erl-top
+ (lambda _
+ (setenv "ERL_TOP" (getcwd))))
+ (add-before 'configure 'autoconf
+ (lambda _ (zero? (system* "./otp_build" "autoconf"))))
+ (add-after 'install 'patch-erl
+ ;; This only works after install.
+ (lambda _
+ (substitute* (string-append (assoc-ref %outputs "out") "/bin/erl")
+ (("sed") (which "sed")))))
+ (add-after 'install 'install-doc
+ (lambda* (#:key inputs outputs #:allow-other-keys)
+ (let* ((out (assoc-ref outputs "out"))
+ (manpages (assoc-ref inputs "erlang-manpages"))
+ (share (string-append out "/share/")))
+ (mkdir-p share)
+ (mkdir-p (string-append share "/misc/erlang"))
+ (with-directory-excursion share
+ (and
+ (zero? (system* "tar" "xvf" manpages))
+ (rename-file "COPYRIGHT"
+ (string-append share "/misc/erlang/COPYRIGHT"))
+ ;; Delete superfluous files.
+ (for-each delete-file '("PR.template"
+ "README"))))))))))
+ (home-page "http://erlang.org/")
+ (synopsis "The Erlang programming language")
+ (description
+ "Erlang is a programming language used to build massively
+scalable soft real-time systems with requirements on high
+availability. Some of its uses are in telecoms, banking, e-commerce,
+computer telephony and instant messaging. Erlang's runtime system has
+built-in support for concurrency, distribution and fault tolerance.")
+ ;; Erlang is distributed under the Apache License 2.0, but some components
+ ;; have other licenses. See 'system/COPYRIGHT' in the source distribution.
+ (license (list license:asl2.0 license:bsd-2 license:bsd-3 license:expat
+ license:lgpl2.0+ license:tcl/tk license:zlib))))
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