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lib.systems: Refactor rust.platform generation

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In preparation for a future commit, refactor rust.platform somewhat.

No functional changes intended. Most of the diff here is whitespace
changes.
This commit is contained in:
dramforever 2026-02-25 10:57:39 +08:00
parent 493a3b2177
commit 550a1b8eb5
1 changed files with 67 additions and 63 deletions
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130
lib/systems/default.nix
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@ -417,62 +417,65 @@ let
// args
// {
rust = rust // {
# Once args.rustc.platform.target-family is deprecated and
# removed, there will no longer be any need to modify any
# values from args.rust.platform, so we can drop all the
# "args ? rust" etc. checks, and merge args.rust.platform in
# /after/.
platform = rust.platform or { } // {
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_arch
arch =
if rust ? platform then
rust.platform.arch
else if final.isAarch32 then
"arm"
else if final.isMips64 then
"mips64" # never add "el" suffix
else if final.isPower64 then
"powerpc64" # never add "le" suffix
else
final.parsed.cpu.name;
platform =
rust.platform or { }
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_os
os =
if rust ? platform then
rust.platform.os or "none"
else if final.isDarwin then
"macos"
else if final.isWasm && !final.isWasi then
"unknown" # Needed for {wasm32,wasm64}-unknown-unknown.
else
final.parsed.kernel.name;
# Once args.rustc.platform.target-family is deprecated and
# removed, there will no longer be any need to modify any
# values from args.rust.platform, so we can drop all the
# "args ? rust" etc. checks, and merge args.rust.platform in
# /after/.
// {
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_arch
arch =
if rust ? platform then
rust.platform.arch
else if final.isAarch32 then
"arm"
else if final.isMips64 then
"mips64" # never add "el" suffix
else if final.isPower64 then
"powerpc64" # never add "le" suffix
else
final.parsed.cpu.name;
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_family
target-family =
if args ? rust.platform.target-family then
args.rust.platform.target-family
else if args ? rustc.platform.target-family then
(
# Since https://github.com/rust-lang/rust/pull/84072
# `target-family` is a list instead of single value.
let
f = args.rustc.platform.target-family;
in
if isList f then f else [ f ]
)
else
optional final.isUnix "unix" ++ optional final.isWindows "windows" ++ optional final.isWasm "wasm";
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_os
os =
if rust ? platform then
rust.platform.os or "none"
else if final.isDarwin then
"macos"
else if final.isWasm && !final.isWasi then
"unknown" # Needed for {wasm32,wasm64}-unknown-unknown.
else
final.parsed.kernel.name;
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_vendor
vendor =
let
inherit (final.parsed) vendor;
in
rust.platform.vendor or {
"w64" = "pc";
}
.${vendor.name} or vendor.name;
};
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_family
target-family =
if args ? rust.platform.target-family then
args.rust.platform.target-family
else if args ? rustc.platform.target-family then
(
# Since https://github.com/rust-lang/rust/pull/84072
# `target-family` is a list instead of single value.
let
f = args.rustc.platform.target-family;
in
if isList f then f else [ f ]
)
else
optional final.isUnix "unix" ++ optional final.isWindows "windows" ++ optional final.isWasm "wasm";
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_vendor
vendor =
let
inherit (final.parsed) vendor;
in
rust.platform.vendor or {
"w64" = "pc";
}
.${vendor.name} or vendor.name;
};
# The name of the rust target, even if it is custom. Adjustments are
# because rust has slightly different naming conventions than we do.
@ -497,18 +500,19 @@ let
"gnu"
else
abi.name;
inferred =
# Rust uses `wasm32-wasip?` rather than `wasm32-unknown-wasi`.
# We cannot know which subversion does the user want, and
# currently use WASI 0.1 as default for compatibility. Custom
# users can set `rust.rustcTarget` to override it.
if final.isWasi then
"${cpu_}-wasip1"
else
"${cpu_}-${vendor_}-${kernel.name}${optionalString (abi.name != "unknown") "-${abi_}"}";
in
# TODO: deprecate args.rustc in favour of args.rust after 23.05 is EOL.
args.rust.rustcTarget or args.rustc.config or (
# Rust uses `wasm32-wasip?` rather than `wasm32-unknown-wasi`.
# We cannot know which subversion does the user want, and
# currently use WASI 0.1 as default for compatibility. Custom
# users can set `rust.rustcTarget` to override it.
if final.isWasi then
"${cpu_}-wasip1"
else
"${cpu_}-${vendor_}-${kernel.name}${optionalString (abi.name != "unknown") "-${abi_}"}"
);
args.rust.rustcTarget or args.rustc.config or inferred;
# The name of the rust target if it is standard, or the json file
# containing the custom target spec.