(define-module (gnu packages zig)
  #:use-module (guix packages)
  #:use-module (guix git-download)
  #:use-module (guix build-system cmake)
  #:use-module ((guix licenses) #:prefix l:)
  #:use-module (guix build utils)
  #:use-module (gnu packages)
  #:use-module (gnu packages llvm)
  #:use-module (guix utils))

;; Zig versions depend on specific LLVM major versions; should be able to update
;; to 0.8.x with lld@12
(define-public zig
  (package
    (name "zig")
    (version "0.7.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/ziglang/zig")
             (commit version)))
       (sha256
        (base32
         "0gq8xjqr3n38i2adkv9vf936frac80wh72dvhh4m5s66yafmhphg"))))
    (build-system cmake-build-system)
    (inputs
     `(("llvm" ,llvm-11)
       ("clang-toolchain" ,clang-toolchain-11)
       ("lld" ,lld))) ; is currently version 11
    (arguments
     `(#:tests? #f
       #:phases (modify-phases %standard-phases
                  (add-before 'install 'set-cachedir
                    (lambda* _ ;; See [[https://github.com/ziglang/zig/issues/6810]]
                      (setenv "XDG_CACHE_HOME" "/tmp/"))))))
    (home-page "https://ziglang.org/")
    (synopsis
     "Programming language for maintaining robust, optimal, and reusable software")
    (description
     "Zig is a general-purpose programming language and toolchain for
maintaining robust, optimal, and reusable software.

⚡ A Simple Language

Focus on debugging your application rather than debugging your programming
language knowledge.
@itemize @bullet
@item No hidden control flow.
@item No hidden memory allocations.
@item No preprocessor, no macros.
@end itemize

⚡ Comptime

A fresh approach to metaprogramming based on compile-time code execution and
lazy evaluation.
@itemize @bullet
@item Call any function at compile-time.
@item Manipulate types as values without runtime overhead.
@item Comptime emulates the target architecture.
@end itemize

⚡ Performance Meets Safety

Write fast, clear code capable of handling all error conditions.
@itemize @bullet
@item The language gracefully guides your error handling logic.
@item Configurable runtime checks help you strike a balance between performance
and safety guarantees.
@item Take advantage of vector types to express SIMD instructions portably.
@end itemize")
    (license l:expat)))