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build-support/rust/lib: Add toTargetVendor

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Used in cases where you need to get the vendor of a target. Such as when
you need to perform dependency resolution outside of Cargo (eg in
Kolloch's crate2nix).
This commit is contained in:
Jordan Isaacs 2023-02-15 16:35:13 -05:00
parent 73a87e9c04
commit 66dccd88b8
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1 changed files with 9 additions and 4 deletions
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13
pkgs/build-support/rust/lib/default.nix
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@ -30,10 +30,17 @@ rec {
else lib.optional platform.isUnix "unix"
++ lib.optional platform.isWindows "windows";
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_vendor
toTargetVendor = platform: let
inherit (platform.parsed) vendor;
in platform.rustc.platform.vendor or {
"w64" = "pc";
}.${vendor.name} or vendor.name;
# Returns the name of the rust target, even if it is custom. Adjustments are
# because rust has slightly different naming conventions than we do.
toRustTarget = platform: let
inherit (platform.parsed) cpu vendor kernel abi;
inherit (platform.parsed) cpu kernel abi;
cpu_ = platform.rustc.platform.arch or {
"armv7a" = "armv7";
"armv7l" = "armv7";
@ -41,9 +48,7 @@ rec {
"armv5tel" = "armv5te";
"riscv64" = "riscv64gc";
}.${cpu.name} or cpu.name;
vendor_ = platform.rustc.platform.vendor or {
"w64" = "pc";
}.${vendor.name} or vendor.name;
vendor_ = toTargetVendor platform;
in platform.rustc.config
or "${cpu_}-${vendor_}-${kernel.name}${lib.optionalString (abi.name != "unknown") "-${abi.name}"}";