A setup hook for using the Zig compiler in Nixpkgs. *Warning*: the setup-hook shell script was linted with shellcheck!
91 lines
2.5 KiB
Bash
91 lines
2.5 KiB
Bash
# shellcheck shell=bash disable=SC2154,SC2086
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# This readonly zigDefaultBuildFlagsArray below is meant to avoid CPU feature
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# impurity in Nixpkgs. However, this flagset is "unstable": it is specifically
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# meant to be controlled by the upstream development team - being up to that
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# team exposing or not that flags to the outside (especially the package manager
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# teams).
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# Because of this hurdle, @andrewrk from Zig Software Foundation proposed some
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# solutions for this issue. Hopefully they will be implemented in future
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# releases of Zig. When this happens, this flagset should be revisited
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# accordingly.
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# Below are some useful links describing the discovery process of this 'bug' in
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# Nixpkgs:
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# https://github.com/NixOS/nixpkgs/issues/169461
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# https://github.com/NixOS/nixpkgs/issues/185644
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# https://github.com/NixOS/nixpkgs/pull/197046
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# https://github.com/NixOS/nixpkgs/pull/241741#issuecomment-1624227485
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# https://github.com/ziglang/zig/issues/14281#issuecomment-1624220653
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readonly zigDefaultFlagsArray=("-Drelease-safe=true" "-Dcpu=baseline")
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function zigSetGlobalCacheDir {
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ZIG_GLOBAL_CACHE_DIR=$(mktemp -d)
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export ZIG_GLOBAL_CACHE_DIR
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}
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function zigBuildPhase {
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runHook preBuild
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local flagsArray=(
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"${zigDefaultFlagsArray[@]}"
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$zigBuildFlags "${zigBuildFlagsArray[@]}"
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)
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echoCmd 'build flags' "${flagsArray[@]}"
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zig build "${flagsArray[@]}"
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runHook postBuild
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}
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function zigCheckPhase {
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runHook preCheck
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local flagsArray=(
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"${zigDefaultFlagsArray[@]}"
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$zigCheckFlags "${zigCheckFlagsArray[@]}"
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)
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echoCmd 'check flags' "${flagsArray[@]}"
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zig build test "${flagsArray[@]}"
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runHook postCheck
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}
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function zigInstallPhase {
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runHook preInstall
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local flagsArray=(
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"${zigDefaultFlagsArray[@]}"
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$zigBuildFlags "${zigBuildFlagsArray[@]}"
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$zigInstallFlags "${zigInstallFlagsArray[@]}"
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)
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if [ -z "${dontAddPrefix-}" ]; then
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# Zig does not recognize `--prefix=/dir/`, only `--prefix /dir/`
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flagsArray+=("${prefixKey:---prefix}" "$prefix")
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fi
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echoCmd 'install flags' "${flagsArray[@]}"
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zig build install "${flagsArray[@]}"
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runHook postInstall
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}
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addEnvHooks "$targetOffset" zigSetGlobalCacheDir
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if [ -z "${dontUseZigBuild-}" ] && [ -z "${buildPhase-}" ]; then
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buildPhase=zigBuildPhase
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fi
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if [ -z "${dontUseZigCheck-}" ] && [ -z "${checkPhase-}" ]; then
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checkPhase=zigCheckPhase
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fi
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if [ -z "${dontUseZigInstall-}" ] && [ -z "${installPhase-}" ]; then
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installPhase=zigInstallPhase
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fi
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