Merge branch 'master' into staging

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diff --git a/gnu/packages/elm.scm b/gnu/packages/elm.scm
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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Robert Vollmert <rob@vllmrt.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 (gnu packages elm)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages haskell)
+  #:use-module (gnu packages haskell-check)
+  #:use-module (gnu packages haskell-crypto)
+  #:use-module (gnu packages haskell-xyz)
+  #:use-module (gnu packages haskell-web)
+  #:use-module (guix build-system haskell)
+  #:use-module (guix git-download)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages))
+
+;; The full elm build calls out to itself via Template Haskell to
+;; compile the elm reactor web app. elm reactor isn't required to
+;; compile elm applications, so we take this part out of this
+;; bootstrap package.
+(define-public elm-compiler
+  (package
+    (name "elm-compiler")
+    (version "0.19.0")
+    (source
+     (origin
+       (method git-fetch)
+       (file-name (git-file-name name version))
+       (uri (git-reference
+             (url "https://github.com/elm/compiler/")
+             (commit version)))
+       (sha256
+        (base32 "0s93z9vr0vp5w894ghc5s34nsq09sg1msf59zfiba87sid5vgjqy"))
+       (patches
+        (search-patches "elm-compiler-disable-reactor.patch"
+                        "elm-compiler-relax-glsl-bound.patch"
+                        "elm-compiler-fix-map-key.patch"))))
+    (build-system haskell-build-system)
+    (inputs
+     `(("ghc-ansi-terminal" ,ghc-ansi-terminal)
+       ("ghc-ansi-wl-pprint" ,ghc-ansi-wl-pprint)
+       ("ghc-edit-distance" ,ghc-edit-distance)
+       ("ghc-file-embed" ,ghc-file-embed)
+       ("ghc-http" ,ghc-http)
+       ("ghc-http-client" ,ghc-http-client)
+       ("ghc-http-client-tls" ,ghc-http-client-tls)
+       ("ghc-http-types" ,ghc-http-types)
+       ("ghc-language-glsl" ,ghc-language-glsl)
+       ("ghc-logict" ,ghc-logict)
+       ("ghc-network" ,ghc-network)
+       ("ghc-raw-strings-qq" ,ghc-raw-strings-qq)
+       ("ghc-scientific" ,ghc-scientific)
+       ("ghc-sha" ,ghc-sha)
+       ("ghc-snap-core" ,ghc-snap-core)
+       ("ghc-snap-server" ,ghc-snap-server)
+       ("ghc-unordered-containers"
+        ,ghc-unordered-containers)
+       ("ghc-utf8-string" ,ghc-utf8-string)
+       ("ghc-vector" ,ghc-vector)
+       ("ghc-zip-archive" ,ghc-zip-archive)))
+    (home-page "https://elm-lang.org")
+    (synopsis "Programming language for Web applications")
+    (description
+     "This package provides Elm, a statically-typed functional programming
+language for the browser.  It includes commands for developers such as
+@command{elm make} and @command{elm repl}.")
+    (license license:bsd-3)))