[bug#47006] [PATCH v2 1/1] gnu: Add zig.

[Léo Le Bouter]

From: Leo Prikler <leo.prikler@student.tugraz.at>

* gnu/packages/zig.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it here.

Co-authored-by: Léo Le Bouter <lle-bout@zaclys.net>
---
 gnu/local.mk         |  1 +
 gnu/packages/zig.scm | 76 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 gnu/packages/zig.scm

diff --git a/gnu/local.mk b/gnu/local.mk
index cf8849cf59..ffa8005533 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -586,6 +586,7 @@ GNU_SYSTEM_MODULES =                                \
   %D%/packages/xdisorg.scm                     \
   %D%/packages/xorg.scm                                \
   %D%/packages/xfce.scm                                \
+  %D%/packages/zig.scm                         \
   %D%/packages/zile.scm                                \
   %D%/packages/zwave.scm                       \
                                                \
diff --git a/gnu/packages/zig.scm b/gnu/packages/zig.scm
new file mode 100644
index 0000000000..adc4c3e1e0
--- /dev/null
+++ b/gnu/packages/zig.scm
@@ -0,0 +1,76 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2021 Leo Prikler <leo.prikler@student.tugraz.at>
+;;;
+;;; 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 zig)
+  #:use-module (guix packages)
+  #:use-module (guix git-download)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix build-system cmake)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages llvm))
+
+(define-public zig
+  (package
+    (name "zig")
+    (version "0.7.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/ziglang/zig.git";)
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1z6c4ym9jmga46cw2arn7zv2drcpmrf3vw139gscxp27n7q2z5md"))))
+    (build-system cmake-build-system)
+    (native-inputs
+     `(("clang" ,clang-11)
+       ("lld" ,lld)
+       ("llvm" ,llvm-11)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'save-unpack-dir
+           (lambda _
+             ;; HACK: Passing unpacked source directory to 'check phase.
+             (setenv "ZIG_UNPACK_DIR" (getcwd))
+             #t))
+         (add-after 'configure 'set-home
+           (lambda _
+             (setenv "HOME" (getcwd))    ; zig writes to $HOME/.cache
+             #t))
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key outputs #:allow-other-keys)
+             (with-directory-excursion (getenv "ZIG_UNPACK_DIR")
+               (invoke (string-append (assoc-ref outputs "out") "/bin/zig")
+                       "build" "test"))
+             #t)))))
+    (synopsis "General purpose programming language and toolchain")
+    (description "Zig is a general-purpose programming language and
+toolchain.  Among other features it provides
+@itemize
+@item an Optional type instead of null pointers,
+@item manual memory management,
+@item generic data structures and functions,
+@item compile-time reflection and compile-time code execution,
+@item integration with C using zig as a C compiler, and
+@item concurrency via async functions.
+@end itemize")
+    (home-page "https://github.com/ziglang/zig";)
+    (license license:expat)))
-- 
2.30.2