Split platform detection code into a dedicated uv-platform crate (#14918)

In service of some subsequent work...

Cargo.lock

@@ -4732,6 +4732,7 @@ dependencies = [
  "uv-pep440",
  "uv-pep508",
  "uv-performance-memory-allocator",
+ "uv-platform",
  "uv-platform-tags",
  "uv-publish",
  "uv-pypi-types",
@@ -5553,6 +5554,23 @@ dependencies = [
  "tikv-jemallocator",
 ]
 
+[[package]]
+name = "uv-platform"
+version = "0.0.1"
+dependencies = [
+ "fs-err",
+ "goblin",
+ "indoc",
+ "procfs",
+ "regex",
+ "target-lexicon",
+ "thiserror 2.0.12",
+ "tracing",
+ "uv-fs",
+ "uv-platform-tags",
+ "uv-static",
+]
+
 [[package]]
 name = "uv-platform-tags"
 version = "0.0.1"
@@ -5646,14 +5664,12 @@ dependencies = [
  "dunce",
  "fs-err",
  "futures",
- "goblin",
  "indexmap",
  "indoc",
  "insta",
  "itertools 0.14.0",
  "once_cell",
  "owo-colors",
- "procfs",
  "ref-cast",
  "regex",
  "reqwest",
@@ -5687,6 +5703,7 @@ dependencies = [
  "uv-install-wheel",
  "uv-pep440",
  "uv-pep508",
+ "uv-platform",
  "uv-platform-tags",
  "uv-pypi-types",
  "uv-redacted",

Cargo.toml

@@ -49,6 +49,7 @@ uv-once-map = { path = "crates/uv-once-map" }
 uv-options-metadata = { path = "crates/uv-options-metadata" }
 uv-pep440 = { path = "crates/uv-pep440", features = ["tracing", "rkyv", "version-ranges"] }
 uv-pep508 = { path = "crates/uv-pep508", features = ["non-pep508-extensions"] }
+uv-platform = { path = "crates/uv-platform" }
 uv-platform-tags = { path = "crates/uv-platform-tags" }
 uv-publish = { path = "crates/uv-publish" }
 uv-pypi-types = { path = "crates/uv-pypi-types" }

crates/uv-platform/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "uv-platform"
+version = "0.0.1"
+edition = { workspace = true }
+rust-version = { workspace = true }
+homepage = { workspace = true }
+documentation = { workspace = true }
+repository = { workspace = true }
+authors = { workspace = true }
+license = { workspace = true }
+
+[lib]
+doctest = false
+
+[lints]
+workspace = true
+
+[dependencies]
+uv-static = { workspace = true }
+uv-fs = { workspace = true }
+uv-platform-tags = { workspace = true }
+
+fs-err = { workspace = true }
+goblin = { workspace = true }
+regex = { workspace = true }
+target-lexicon = { workspace = true }
+thiserror = { workspace = true }
+tracing = { workspace = true }
+
+[target.'cfg(target_os = "linux")'.dependencies]
+procfs = { workspace = true }
+
+[dev-dependencies]
+indoc = { workspace = true }

crates/uv-platform/src/arch.rs

@@ -0,0 +1,249 @@
+use crate::Error;
+use std::fmt::Display;
+use std::str::FromStr;
+use std::{cmp, fmt};
+
+/// Architecture variants, e.g., with support for different instruction sets
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash, Ord, PartialOrd)]
+pub enum ArchVariant {
+    /// Targets 64-bit Intel/AMD CPUs newer than Nehalem (2008).
+    /// Includes SSE3, SSE4 and other post-2003 CPU instructions.
+    V2,
+    /// Targets 64-bit Intel/AMD CPUs newer than Haswell (2013) and Excavator (2015).
+    /// Includes AVX, AVX2, MOVBE and other newer CPU instructions.
+    V3,
+    /// Targets 64-bit Intel/AMD CPUs with AVX-512 instructions (post-2017 Intel CPUs).
+    /// Many post-2017 Intel CPUs do not support AVX-512.
+    V4,
+}
+
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
+pub struct Arch {
+    pub(crate) family: target_lexicon::Architecture,
+    pub(crate) variant: Option<ArchVariant>,
+}
+
+impl Ord for Arch {
+    fn cmp(&self, other: &Self) -> cmp::Ordering {
+        if self.family == other.family {
+            return self.variant.cmp(&other.variant);
+        }
+
+        // For the time being, manually make aarch64 windows disfavored
+        // on its own host platform, because most packages don't have wheels for
+        // aarch64 windows, making emulation more useful than native execution!
+        //
+        // The reason we do this in "sorting" and not "supports" is so that we don't
+        // *refuse* to use an aarch64 windows pythons if they happen to be installed
+        // and nothing else is available.
+        //
+        // Similarly if someone manually requests an aarch64 windows install, we
+        // should respect that request (this is the way users should "override"
+        // this behaviour).
+        let preferred = if cfg!(all(windows, target_arch = "aarch64")) {
+            Arch {
+                family: target_lexicon::Architecture::X86_64,
+                variant: None,
+            }
+        } else {
+            // Prefer native architectures
+            Arch::from_env()
+        };
+
+        match (
+            self.family == preferred.family,
+            other.family == preferred.family,
+        ) {
+            (true, true) => unreachable!(),
+            (true, false) => cmp::Ordering::Less,
+            (false, true) => cmp::Ordering::Greater,
+            (false, false) => {
+                // Both non-preferred, fallback to lexicographic order
+                self.family.to_string().cmp(&other.family.to_string())
+            }
+        }
+    }
+}
+
+impl PartialOrd for Arch {
+    fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Arch {
+    pub fn new(family: target_lexicon::Architecture, variant: Option<ArchVariant>) -> Self {
+        Self { family, variant }
+    }
+
+    pub fn from_env() -> Self {
+        Self {
+            family: target_lexicon::HOST.architecture,
+            variant: None,
+        }
+    }
+
+    /// Does the current architecture support running the other?
+    ///
+    /// When the architecture is equal, this is always true. Otherwise, this is true if the
+    /// architecture is transparently emulated or is a microarchitecture with worse performance
+    /// characteristics.
+    pub fn supports(self, other: Self) -> bool {
+        if self == other {
+            return true;
+        }
+
+        // TODO: Implement `variant` support checks
+
+        // Windows ARM64 runs emulated x86_64 binaries transparently
+        // Similarly, macOS aarch64 runs emulated x86_64 binaries transparently if you have Rosetta
+        // installed. We don't try to be clever and check if that's the case here, we just assume
+        // that if x86_64 distributions are available, they're usable.
+        if (cfg!(windows) || cfg!(target_os = "macos"))
+            && matches!(self.family, target_lexicon::Architecture::Aarch64(_))
+        {
+            return other.family == target_lexicon::Architecture::X86_64;
+        }
+
+        false
+    }
+
+    pub fn family(&self) -> target_lexicon::Architecture {
+        self.family
+    }
+
+    pub fn is_arm(&self) -> bool {
+        matches!(self.family, target_lexicon::Architecture::Arm(_))
+    }
+}
+
+impl Display for Arch {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self.family {
+            target_lexicon::Architecture::X86_32(target_lexicon::X86_32Architecture::I686) => {
+                write!(f, "x86")?;
+            }
+            inner => write!(f, "{inner}")?,
+        }
+        if let Some(variant) = self.variant {
+            write!(f, "_{variant}")?;
+        }
+        Ok(())
+    }
+}
+
+impl FromStr for Arch {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        fn parse_family(s: &str) -> Result<target_lexicon::Architecture, Error> {
+            let inner = match s {
+                // Allow users to specify "x86" as a shorthand for the "i686" variant, they should not need
+                // to specify the exact architecture and this variant is what we have downloads for.
+                "x86" => {
+                    target_lexicon::Architecture::X86_32(target_lexicon::X86_32Architecture::I686)
+                }
+                _ => target_lexicon::Architecture::from_str(s)
+                    .map_err(|()| Error::UnknownArch(s.to_string()))?,
+            };
+            if matches!(inner, target_lexicon::Architecture::Unknown) {
+                return Err(Error::UnknownArch(s.to_string()));
+            }
+            Ok(inner)
+        }
+
+        // First check for a variant
+        if let Some((Ok(family), Ok(variant))) = s
+            .rsplit_once('_')
+            .map(|(family, variant)| (parse_family(family), ArchVariant::from_str(variant)))
+        {
+            // We only support variants for `x86_64` right now
+            if !matches!(family, target_lexicon::Architecture::X86_64) {
+                return Err(Error::UnsupportedVariant(
+                    variant.to_string(),
+                    family.to_string(),
+                ));
+            }
+            return Ok(Self {
+                family,
+                variant: Some(variant),
+            });
+        }
+
+        let family = parse_family(s)?;
+
+        Ok(Self {
+            family,
+            variant: None,
+        })
+    }
+}
+
+impl FromStr for ArchVariant {
+    type Err = ();
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "v2" => Ok(Self::V2),
+            "v3" => Ok(Self::V3),
+            "v4" => Ok(Self::V4),
+            _ => Err(()),
+        }
+    }
+}
+
+impl Display for ArchVariant {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::V2 => write!(f, "v2"),
+            Self::V3 => write!(f, "v3"),
+            Self::V4 => write!(f, "v4"),
+        }
+    }
+}
+
+impl From<&uv_platform_tags::Arch> for Arch {
+    fn from(value: &uv_platform_tags::Arch) -> Self {
+        match value {
+            uv_platform_tags::Arch::Aarch64 => Arch::new(
+                target_lexicon::Architecture::Aarch64(target_lexicon::Aarch64Architecture::Aarch64),
+                None,
+            ),
+            uv_platform_tags::Arch::Armv5TEL => Arch::new(
+                target_lexicon::Architecture::Arm(target_lexicon::ArmArchitecture::Armv5te),
+                None,
+            ),
+            uv_platform_tags::Arch::Armv6L => Arch::new(
+                target_lexicon::Architecture::Arm(target_lexicon::ArmArchitecture::Armv6),
+                None,
+            ),
+            uv_platform_tags::Arch::Armv7L => Arch::new(
+                target_lexicon::Architecture::Arm(target_lexicon::ArmArchitecture::Armv7),
+                None,
+            ),
+            uv_platform_tags::Arch::S390X => Arch::new(target_lexicon::Architecture::S390x, None),
+            uv_platform_tags::Arch::Powerpc => {
+                Arch::new(target_lexicon::Architecture::Powerpc, None)
+            }
+            uv_platform_tags::Arch::Powerpc64 => {
+                Arch::new(target_lexicon::Architecture::Powerpc64, None)
+            }
+            uv_platform_tags::Arch::Powerpc64Le => {
+                Arch::new(target_lexicon::Architecture::Powerpc64le, None)
+            }
+            uv_platform_tags::Arch::X86 => Arch::new(
+                target_lexicon::Architecture::X86_32(target_lexicon::X86_32Architecture::I686),
+                None,
+            ),
+            uv_platform_tags::Arch::X86_64 => Arch::new(target_lexicon::Architecture::X86_64, None),
+            uv_platform_tags::Arch::LoongArch64 => {
+                Arch::new(target_lexicon::Architecture::LoongArch64, None)
+            }
+            uv_platform_tags::Arch::Riscv64 => Arch::new(
+                target_lexicon::Architecture::Riscv64(target_lexicon::Riscv64Architecture::Riscv64),
+                None,
+            ),
+            uv_platform_tags::Arch::Wasm32 => Arch::new(target_lexicon::Architecture::Wasm32, None),
+        }
+    }
+}

crates/uv-platform/src/cpuinfo.rs

@@ -1,6 +1,6 @@
 //! Fetches CPU information.
 
-use anyhow::Error;
+use std::io::Error;
 
 #[cfg(target_os = "linux")]
 use procfs::{CpuInfo, Current};
@@ -14,7 +14,7 @@ use procfs::{CpuInfo, Current};
 /// More information on this can be found in the [Debian ARM Hard Float Port documentation](https://wiki.debian.org/ArmHardFloatPort#VFP).
 #[cfg(target_os = "linux")]
 pub(crate) fn detect_hardware_floating_point_support() -> Result<bool, Error> {
-    let cpu_info = CpuInfo::current()?;
+    let cpu_info = CpuInfo::current().map_err(Error::other)?;
     if let Some(features) = cpu_info.fields.get("Features") {
         if features.contains("vfp") {
             return Ok(true); // "vfp" found: hard-float (gnueabihf) detected

crates/uv-platform/src/lib.rs

@@ -0,0 +1,26 @@
+//! Platform detection for operating system, architecture, and libc.
+
+use thiserror::Error;
+
+pub use crate::arch::{Arch, ArchVariant};
+pub use crate::libc::{Libc, LibcDetectionError, LibcVersion};
+pub use crate::os::Os;
+
+mod arch;
+mod cpuinfo;
+mod libc;
+mod os;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("Unknown operating system: {0}")]
+    UnknownOs(String),
+    #[error("Unknown architecture: {0}")]
+    UnknownArch(String),
+    #[error("Unknown libc environment: {0}")]
+    UnknownLibc(String),
+    #[error("Unsupported variant `{0}` for architecture `{1}`")]
+    UnsupportedVariant(String, String),
+    #[error(transparent)]
+    LibcDetectionError(#[from] crate::libc::LibcDetectionError),
+}

crates/uv-platform/src/libc.rs

@@ -3,18 +3,22 @@
 //! Taken from `glibc_version` (<https://github.com/delta-incubator/glibc-version-rs>),
 //! which used the Apache 2.0 license (but not the MIT license)
 
+use crate::cpuinfo::detect_hardware_floating_point_support;
 use fs_err as fs;
 use goblin::elf::Elf;
 use regex::Regex;
+use std::fmt::Display;
 use std::io;
 use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
+use std::str::FromStr;
 use std::sync::LazyLock;
-use thiserror::Error;
+use std::{env, fmt};
 use tracing::trace;
 use uv_fs::Simplified;
+use uv_static::EnvVars;
 
-#[derive(Debug, Error)]
+#[derive(Debug, thiserror::Error)]
 pub enum LibcDetectionError {
     #[error(
         "Could not detect either glibc version nor musl libc version, at least one of which is required"
@@ -45,11 +49,89 @@ pub enum LibcDetectionError {
 
 /// We support glibc (manylinux) and musl (musllinux) on linux.
 #[derive(Debug, PartialEq, Eq)]
-pub(crate) enum LibcVersion {
+pub enum LibcVersion {
     Manylinux { major: u32, minor: u32 },
     Musllinux { major: u32, minor: u32 },
 }
 
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
+pub enum Libc {
+    Some(target_lexicon::Environment),
+    None,
+}
+
+impl Libc {
+    pub fn from_env() -> Result<Self, crate::Error> {
+        match env::consts::OS {
+            "linux" => {
+                if let Ok(libc) = env::var(EnvVars::UV_LIBC) {
+                    if !libc.is_empty() {
+                        return Self::from_str(&libc);
+                    }
+                }
+
+                Ok(Self::Some(match detect_linux_libc()? {
+                    LibcVersion::Manylinux { .. } => match env::consts::ARCH {
+                        // Checks if the CPU supports hardware floating-point operations.
+                        // Depending on the result, it selects either the `gnueabihf` (hard-float) or `gnueabi` (soft-float) environment.
+                        // download-metadata.json only includes armv7.
+                        "arm" | "armv5te" | "armv7" => {
+                            match detect_hardware_floating_point_support() {
+                                Ok(true) => target_lexicon::Environment::Gnueabihf,
+                                Ok(false) => target_lexicon::Environment::Gnueabi,
+                                Err(_) => target_lexicon::Environment::Gnu,
+                            }
+                        }
+                        _ => target_lexicon::Environment::Gnu,
+                    },
+                    LibcVersion::Musllinux { .. } => target_lexicon::Environment::Musl,
+                }))
+            }
+            "windows" | "macos" => Ok(Self::None),
+            // Use `None` on platforms without explicit support.
+            _ => Ok(Self::None),
+        }
+    }
+
+    pub fn is_musl(&self) -> bool {
+        matches!(self, Self::Some(target_lexicon::Environment::Musl))
+    }
+}
+
+impl FromStr for Libc {
+    type Err = crate::Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "gnu" => Ok(Self::Some(target_lexicon::Environment::Gnu)),
+            "gnueabi" => Ok(Self::Some(target_lexicon::Environment::Gnueabi)),
+            "gnueabihf" => Ok(Self::Some(target_lexicon::Environment::Gnueabihf)),
+            "musl" => Ok(Self::Some(target_lexicon::Environment::Musl)),
+            "none" => Ok(Self::None),
+            _ => Err(crate::Error::UnknownLibc(s.to_string())),
+        }
+    }
+}
+
+impl Display for Libc {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Some(env) => write!(f, "{env}"),
+            Self::None => write!(f, "none"),
+        }
+    }
+}
+
+impl From<&uv_platform_tags::Os> for Libc {
+    fn from(value: &uv_platform_tags::Os) -> Self {
+        match value {
+            uv_platform_tags::Os::Manylinux { .. } => Libc::Some(target_lexicon::Environment::Gnu),
+            uv_platform_tags::Os::Musllinux { .. } => Libc::Some(target_lexicon::Environment::Musl),
+            _ => Libc::None,
+        }
+    }
+}
+
 /// Determine whether we're running glibc or musl and in which version, given we are on linux.
 ///
 /// Normally, we determine this from the python interpreter, which is more accurate, but when

crates/uv-platform/src/os.rs

@@ -0,0 +1,88 @@
+use crate::Error;
+use std::fmt;
+use std::fmt::Display;
+use std::ops::Deref;
+use std::str::FromStr;
+
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
+pub struct Os(pub(crate) target_lexicon::OperatingSystem);
+
+impl Os {
+    pub fn new(os: target_lexicon::OperatingSystem) -> Self {
+        Self(os)
+    }
+
+    pub fn from_env() -> Self {
+        Self(target_lexicon::HOST.operating_system)
+    }
+
+    pub fn is_windows(&self) -> bool {
+        matches!(self.0, target_lexicon::OperatingSystem::Windows)
+    }
+}
+
+impl Display for Os {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match &**self {
+            target_lexicon::OperatingSystem::Darwin(_) => write!(f, "macos"),
+            inner => write!(f, "{inner}"),
+        }
+    }
+}
+
+impl FromStr for Os {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let inner = match s {
+            "macos" => target_lexicon::OperatingSystem::Darwin(None),
+            _ => target_lexicon::OperatingSystem::from_str(s)
+                .map_err(|()| Error::UnknownOs(s.to_string()))?,
+        };
+        if matches!(inner, target_lexicon::OperatingSystem::Unknown) {
+            return Err(Error::UnknownOs(s.to_string()));
+        }
+        Ok(Self(inner))
+    }
+}
+
+impl Deref for Os {
+    type Target = target_lexicon::OperatingSystem;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl From<&uv_platform_tags::Os> for Os {
+    fn from(value: &uv_platform_tags::Os) -> Self {
+        match value {
+            uv_platform_tags::Os::Dragonfly { .. } => {
+                Os::new(target_lexicon::OperatingSystem::Dragonfly)
+            }
+            uv_platform_tags::Os::FreeBsd { .. } => {
+                Os::new(target_lexicon::OperatingSystem::Freebsd)
+            }
+            uv_platform_tags::Os::Haiku { .. } => Os::new(target_lexicon::OperatingSystem::Haiku),
+            uv_platform_tags::Os::Illumos { .. } => {
+                Os::new(target_lexicon::OperatingSystem::Illumos)
+            }
+            uv_platform_tags::Os::Macos { .. } => {
+                Os::new(target_lexicon::OperatingSystem::Darwin(None))
+            }
+            uv_platform_tags::Os::Manylinux { .. }
+            | uv_platform_tags::Os::Musllinux { .. }
+            | uv_platform_tags::Os::Android { .. } => {
+                Os::new(target_lexicon::OperatingSystem::Linux)
+            }
+            uv_platform_tags::Os::NetBsd { .. } => Os::new(target_lexicon::OperatingSystem::Netbsd),
+            uv_platform_tags::Os::OpenBsd { .. } => {
+                Os::new(target_lexicon::OperatingSystem::Openbsd)
+            }
+            uv_platform_tags::Os::Windows => Os::new(target_lexicon::OperatingSystem::Windows),
+            uv_platform_tags::Os::Pyodide { .. } => {
+                Os::new(target_lexicon::OperatingSystem::Emscripten)
+            }
+        }
+    }
+}

crates/uv-python/Cargo.toml

@@ -28,6 +28,7 @@ uv-fs = { workspace = true }
 uv-install-wheel = { workspace = true }
 uv-pep440 = { workspace = true }
 uv-pep508 = { workspace = true }
+uv-platform = { workspace = true }
 uv-platform-tags = { workspace = true }
 uv-pypi-types = { workspace = true }
 uv-redacted = { workspace = true }
@@ -42,7 +43,6 @@ configparser = { workspace = true }
 dunce = { workspace = true }
 fs-err = { workspace = true, features = ["tokio"] }
 futures = { workspace = true }
-goblin = { workspace = true, default-features = false }
 indexmap = { workspace = true }
 itertools = { workspace = true }
 owo-colors = { workspace = true }
@@ -68,9 +68,6 @@ url = { workspace = true }
 which = { workspace = true }
 once_cell = { workspace = true }
 
-[target.'cfg(target_os = "linux")'.dependencies]
-procfs = { workspace = true }
-
 [target.'cfg(target_os = "windows")'.dependencies]
 windows-registry = { workspace = true }
 windows-result = { workspace = true }

crates/uv-python/src/discovery.rs

@@ -3066,8 +3066,8 @@ mod tests {
         discovery::{PythonRequest, VersionRequest},
         downloads::{ArchRequest, PythonDownloadRequest},
         implementation::ImplementationName,
-        platform::{Arch, Libc, Os},
     };
+    use uv_platform::{Arch, Libc, Os};
 
     use super::{Error, PythonVariant};
 
@@ -3154,11 +3154,11 @@ mod tests {
                     PythonVariant::Default
                 )),
                 implementation: Some(ImplementationName::CPython),
-                arch: Some(ArchRequest::Explicit(Arch {
+                arch: Some(ArchRequest::Explicit(Arch::new(
-                    family: Architecture::Aarch64(Aarch64Architecture::Aarch64),
+                    Architecture::Aarch64(Aarch64Architecture::Aarch64),
-                    variant: None
+                    None
-                })),
+                ))),
-                os: Some(Os(target_lexicon::OperatingSystem::Darwin(None))),
+                os: Some(Os::new(target_lexicon::OperatingSystem::Darwin(None))),
                 libc: Some(Libc::None),
                 prereleases: None
             })
@@ -3189,10 +3189,10 @@ mod tests {
                     PythonVariant::Default
                 )),
                 implementation: None,
-                arch: Some(ArchRequest::Explicit(Arch {
+                arch: Some(ArchRequest::Explicit(Arch::new(
-                    family: Architecture::Aarch64(Aarch64Architecture::Aarch64),
+                    Architecture::Aarch64(Aarch64Architecture::Aarch64),
-                    variant: None
+                    None
-                })),
+                ))),
                 os: None,
                 libc: None,
                 prereleases: None

crates/uv-python/src/downloads.rs

@@ -25,6 +25,7 @@ use uv_client::{BaseClient, WrappedReqwestError, is_extended_transient_error};
 use uv_distribution_filename::{ExtensionError, SourceDistExtension};
 use uv_extract::hash::Hasher;
 use uv_fs::{Simplified, rename_with_retry};
+use uv_platform::{self as platform, Arch, Libc, Os};
 use uv_pypi_types::{HashAlgorithm, HashDigest};
 use uv_redacted::DisplaySafeUrl;
 use uv_static::EnvVars;
@@ -34,9 +35,7 @@ use crate::implementation::{
     Error as ImplementationError, ImplementationName, LenientImplementationName,
 };
 use crate::installation::PythonInstallationKey;
-use crate::libc::LibcDetectionError;
 use crate::managed::ManagedPythonInstallation;
-use crate::platform::{self, Arch, Libc, Os};
 use crate::{Interpreter, PythonRequest, PythonVersion, VersionRequest};
 
 #[derive(Error, Debug)]
@@ -98,7 +97,7 @@ pub enum Error {
     #[error("A mirror was provided via `{0}`, but the URL does not match the expected format: {0}")]
     Mirror(&'static str, &'static str),
     #[error("Failed to determine the libc used on the current platform")]
-    LibcDetection(#[from] LibcDetectionError),
+    LibcDetection(#[from] platform::LibcDetectionError),
     #[error("Remote Python downloads JSON is not yet supported, please use a local path")]
     RemoteJSONNotSupported,
     #[error("The JSON of the python downloads is invalid: {0}")]

crates/uv-python/src/installation.rs

@@ -10,6 +10,7 @@ use uv_cache::Cache;
 use uv_client::BaseClientBuilder;
 use uv_configuration::Preview;
 use uv_pep440::{Prerelease, Version};
+use uv_platform::{Arch, Libc, Os};
 
 use crate::discovery::{
     EnvironmentPreference, PythonRequest, find_best_python_installation, find_python_installation,
@@ -17,7 +18,6 @@ use crate::discovery::{
 use crate::downloads::{DownloadResult, ManagedPythonDownload, PythonDownloadRequest, Reporter};
 use crate::implementation::LenientImplementationName;
 use crate::managed::{ManagedPythonInstallation, ManagedPythonInstallations};
-use crate::platform::{Arch, Libc, Os};
 use crate::{
     Error, ImplementationName, Interpreter, PythonDownloads, PythonPreference, PythonSource,
     PythonVariant, PythonVersion, downloads,

crates/uv-python/src/interpreter.rs

@@ -21,13 +21,13 @@ use uv_fs::{LockedFile, PythonExt, Simplified, write_atomic_sync};
 use uv_install_wheel::Layout;
 use uv_pep440::Version;
 use uv_pep508::{MarkerEnvironment, StringVersion};
+use uv_platform::{Arch, Libc, Os};
 use uv_platform_tags::Platform;
 use uv_platform_tags::{Tags, TagsError};
 use uv_pypi_types::{ResolverMarkerEnvironment, Scheme};
 
 use crate::implementation::LenientImplementationName;
 use crate::managed::ManagedPythonInstallations;
-use crate::platform::{Arch, Libc, Os};
 use crate::pointer_size::PointerSize;
 use crate::{
     Prefix, PythonInstallationKey, PythonVariant, PythonVersion, Target, VersionRequest,

crates/uv-python/src/lib.rs

@@ -29,19 +29,16 @@ pub use crate::version_files::{
 };
 pub use crate::virtualenv::{Error as VirtualEnvError, PyVenvConfiguration, VirtualEnvironment};
 
-mod cpuinfo;
 mod discovery;
 pub mod downloads;
 mod environment;
 mod implementation;
 mod installation;
 mod interpreter;
-mod libc;
 pub mod macos_dylib;
 pub mod managed;
 #[cfg(windows)]
 mod microsoft_store;
-pub mod platform;
 mod pointer_size;
 mod prefix;
 mod python_version;

crates/uv-python/src/managed.rs

@@ -17,6 +17,8 @@ use uv_configuration::{Preview, PreviewFeatures};
 use windows_sys::Win32::Storage::FileSystem::FILE_ATTRIBUTE_REPARSE_POINT;
 
 use uv_fs::{LockedFile, Simplified, replace_symlink, symlink_or_copy_file};
+use uv_platform::Error as PlatformError;
+use uv_platform::{Arch, Libc, LibcDetectionError, Os};
 use uv_state::{StateBucket, StateStore};
 use uv_static::EnvVars;
 use uv_trampoline_builder::{Launcher, windows_python_launcher};
@@ -26,9 +28,6 @@ use crate::implementation::{
     Error as ImplementationError, ImplementationName, LenientImplementationName,
 };
 use crate::installation::{self, PythonInstallationKey};
-use crate::libc::LibcDetectionError;
-use crate::platform::Error as PlatformError;
-use crate::platform::{Arch, Libc, Os};
 use crate::python_version::PythonVersion;
 use crate::{
     PythonInstallationMinorVersionKey, PythonRequest, PythonVariant, macos_dylib, sysconfig,
@@ -271,7 +270,7 @@ impl ManagedPythonInstallations {
                     && (arch.supports(installation.key.arch)
                         // TODO(zanieb): Allow inequal variants, as `Arch::supports` does not
                         // implement this yet. See https://github.com/astral-sh/uv/pull/9788
-                        || arch.family == installation.key.arch.family)
+                        || arch.family() == installation.key.arch.family())
                     && installation.key.libc == libc
             });
 
@@ -545,7 +544,7 @@ impl ManagedPythonInstallation {
     /// standard `EXTERNALLY-MANAGED` file.
     pub fn ensure_externally_managed(&self) -> Result<(), Error> {
         // Construct the path to the `stdlib` directory.
-        let stdlib = if matches!(self.key.os, Os(target_lexicon::OperatingSystem::Windows)) {
+        let stdlib = if self.key.os.is_windows() {
             self.python_dir().join("Lib")
         } else {
             let lib_suffix = self.key.variant.suffix();

crates/uv-python/src/platform.rs

@@ -1,427 +0,0 @@
-use crate::cpuinfo::detect_hardware_floating_point_support;
-use crate::libc::{LibcDetectionError, LibcVersion, detect_linux_libc};
-use std::fmt::Display;
-use std::ops::Deref;
-use std::{fmt, str::FromStr};
-use thiserror::Error;
-
-use uv_static::EnvVars;
-
-#[derive(Error, Debug)]
-pub enum Error {
-    #[error("Unknown operating system: {0}")]
-    UnknownOs(String),
-    #[error("Unknown architecture: {0}")]
-    UnknownArch(String),
-    #[error("Unknown libc environment: {0}")]
-    UnknownLibc(String),
-    #[error("Unsupported variant `{0}` for architecture `{1}`")]
-    UnsupportedVariant(String, String),
-    #[error(transparent)]
-    LibcDetectionError(#[from] LibcDetectionError),
-}
-
-/// Architecture variants, e.g., with support for different instruction sets
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash, Ord, PartialOrd)]
-pub enum ArchVariant {
-    /// Targets 64-bit Intel/AMD CPUs newer than Nehalem (2008).
-    /// Includes SSE3, SSE4 and other post-2003 CPU instructions.
-    V2,
-    /// Targets 64-bit Intel/AMD CPUs newer than Haswell (2013) and Excavator (2015).
-    /// Includes AVX, AVX2, MOVBE and other newer CPU instructions.
-    V3,
-    /// Targets 64-bit Intel/AMD CPUs with AVX-512 instructions (post-2017 Intel CPUs).
-    /// Many post-2017 Intel CPUs do not support AVX-512.
-    V4,
-}
-
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
-pub struct Arch {
-    pub(crate) family: target_lexicon::Architecture,
-    pub(crate) variant: Option<ArchVariant>,
-}
-
-impl Ord for Arch {
-    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
-        if self.family == other.family {
-            return self.variant.cmp(&other.variant);
-        }
-
-        // For the time being, manually make aarch64 windows disfavored
-        // on its own host platform, because most packages don't have wheels for
-        // aarch64 windows, making emulation more useful than native execution!
-        //
-        // The reason we do this in "sorting" and not "supports" is so that we don't
-        // *refuse* to use an aarch64 windows pythons if they happen to be installed
-        // and nothing else is available.
-        //
-        // Similarly if someone manually requests an aarch64 windows install, we
-        // should respect that request (this is the way users should "override"
-        // this behaviour).
-        let preferred = if cfg!(all(windows, target_arch = "aarch64")) {
-            Arch {
-                family: target_lexicon::Architecture::X86_64,
-                variant: None,
-            }
-        } else {
-            // Prefer native architectures
-            Arch::from_env()
-        };
-
-        match (
-            self.family == preferred.family,
-            other.family == preferred.family,
-        ) {
-            (true, true) => unreachable!(),
-            (true, false) => std::cmp::Ordering::Less,
-            (false, true) => std::cmp::Ordering::Greater,
-            (false, false) => {
-                // Both non-preferred, fallback to lexicographic order
-                self.family.to_string().cmp(&other.family.to_string())
-            }
-        }
-    }
-}
-
-impl PartialOrd for Arch {
-    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
-pub struct Os(pub(crate) target_lexicon::OperatingSystem);
-
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
-pub enum Libc {
-    Some(target_lexicon::Environment),
-    None,
-}
-
-impl Libc {
-    pub(crate) fn from_env() -> Result<Self, Error> {
-        match std::env::consts::OS {
-            "linux" => {
-                if let Ok(libc) = std::env::var(EnvVars::UV_LIBC) {
-                    if !libc.is_empty() {
-                        return Self::from_str(&libc);
-                    }
-                }
-
-                Ok(Self::Some(match detect_linux_libc()? {
-                    LibcVersion::Manylinux { .. } => match std::env::consts::ARCH {
-                        // Checks if the CPU supports hardware floating-point operations.
-                        // Depending on the result, it selects either the `gnueabihf` (hard-float) or `gnueabi` (soft-float) environment.
-                        // download-metadata.json only includes armv7.
-                        "arm" | "armv5te" | "armv7" => {
-                            match detect_hardware_floating_point_support() {
-                                Ok(true) => target_lexicon::Environment::Gnueabihf,
-                                Ok(false) => target_lexicon::Environment::Gnueabi,
-                                Err(_) => target_lexicon::Environment::Gnu,
-                            }
-                        }
-                        _ => target_lexicon::Environment::Gnu,
-                    },
-                    LibcVersion::Musllinux { .. } => target_lexicon::Environment::Musl,
-                }))
-            }
-            "windows" | "macos" => Ok(Self::None),
-            // Use `None` on platforms without explicit support.
-            _ => Ok(Self::None),
-        }
-    }
-
-    pub fn is_musl(&self) -> bool {
-        matches!(self, Self::Some(target_lexicon::Environment::Musl))
-    }
-}
-
-impl FromStr for Libc {
-    type Err = Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "gnu" => Ok(Self::Some(target_lexicon::Environment::Gnu)),
-            "gnueabi" => Ok(Self::Some(target_lexicon::Environment::Gnueabi)),
-            "gnueabihf" => Ok(Self::Some(target_lexicon::Environment::Gnueabihf)),
-            "musl" => Ok(Self::Some(target_lexicon::Environment::Musl)),
-            "none" => Ok(Self::None),
-            _ => Err(Error::UnknownLibc(s.to_string())),
-        }
-    }
-}
-
-impl Os {
-    pub fn from_env() -> Self {
-        Self(target_lexicon::HOST.operating_system)
-    }
-}
-
-impl Arch {
-    pub fn from_env() -> Self {
-        Self {
-            family: target_lexicon::HOST.architecture,
-            variant: None,
-        }
-    }
-
-    /// Does the current architecture support running the other?
-    ///
-    /// When the architecture is equal, this is always true. Otherwise, this is true if the
-    /// architecture is transparently emulated or is a microarchitecture with worse performance
-    /// characteristics.
-    pub(crate) fn supports(self, other: Self) -> bool {
-        if self == other {
-            return true;
-        }
-
-        // TODO: Implement `variant` support checks
-
-        // Windows ARM64 runs emulated x86_64 binaries transparently
-        // Similarly, macOS aarch64 runs emulated x86_64 binaries transparently if you have Rosetta
-        // installed. We don't try to be clever and check if that's the case here, we just assume
-        // that if x86_64 distributions are available, they're usable.
-        if (cfg!(windows) || cfg!(target_os = "macos"))
-            && matches!(self.family, target_lexicon::Architecture::Aarch64(_))
-        {
-            return other.family == target_lexicon::Architecture::X86_64;
-        }
-
-        false
-    }
-
-    pub fn family(&self) -> target_lexicon::Architecture {
-        self.family
-    }
-
-    pub fn is_arm(&self) -> bool {
-        matches!(self.family, target_lexicon::Architecture::Arm(_))
-    }
-}
-
-impl Display for Libc {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Self::Some(env) => write!(f, "{env}"),
-            Self::None => write!(f, "none"),
-        }
-    }
-}
-
-impl Display for Os {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match &**self {
-            target_lexicon::OperatingSystem::Darwin(_) => write!(f, "macos"),
-            inner => write!(f, "{inner}"),
-        }
-    }
-}
-
-impl Display for Arch {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self.family {
-            target_lexicon::Architecture::X86_32(target_lexicon::X86_32Architecture::I686) => {
-                write!(f, "x86")?;
-            }
-            inner => write!(f, "{inner}")?,
-        }
-        if let Some(variant) = self.variant {
-            write!(f, "_{variant}")?;
-        }
-        Ok(())
-    }
-}
-
-impl FromStr for Os {
-    type Err = Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let inner = match s {
-            "macos" => target_lexicon::OperatingSystem::Darwin(None),
-            _ => target_lexicon::OperatingSystem::from_str(s)
-                .map_err(|()| Error::UnknownOs(s.to_string()))?,
-        };
-        if matches!(inner, target_lexicon::OperatingSystem::Unknown) {
-            return Err(Error::UnknownOs(s.to_string()));
-        }
-        Ok(Self(inner))
-    }
-}
-
-impl FromStr for Arch {
-    type Err = Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        fn parse_family(s: &str) -> Result<target_lexicon::Architecture, Error> {
-            let inner = match s {
-                // Allow users to specify "x86" as a shorthand for the "i686" variant, they should not need
-                // to specify the exact architecture and this variant is what we have downloads for.
-                "x86" => {
-                    target_lexicon::Architecture::X86_32(target_lexicon::X86_32Architecture::I686)
-                }
-                _ => target_lexicon::Architecture::from_str(s)
-                    .map_err(|()| Error::UnknownArch(s.to_string()))?,
-            };
-            if matches!(inner, target_lexicon::Architecture::Unknown) {
-                return Err(Error::UnknownArch(s.to_string()));
-            }
-            Ok(inner)
-        }
-
-        // First check for a variant
-        if let Some((Ok(family), Ok(variant))) = s
-            .rsplit_once('_')
-            .map(|(family, variant)| (parse_family(family), ArchVariant::from_str(variant)))
-        {
-            // We only support variants for `x86_64` right now
-            if !matches!(family, target_lexicon::Architecture::X86_64) {
-                return Err(Error::UnsupportedVariant(
-                    variant.to_string(),
-                    family.to_string(),
-                ));
-            }
-            return Ok(Self {
-                family,
-                variant: Some(variant),
-            });
-        }
-
-        let family = parse_family(s)?;
-
-        Ok(Self {
-            family,
-            variant: None,
-        })
-    }
-}
-
-impl FromStr for ArchVariant {
-    type Err = ();
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "v2" => Ok(Self::V2),
-            "v3" => Ok(Self::V3),
-            "v4" => Ok(Self::V4),
-            _ => Err(()),
-        }
-    }
-}
-
-impl Display for ArchVariant {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Self::V2 => write!(f, "v2"),
-            Self::V3 => write!(f, "v3"),
-            Self::V4 => write!(f, "v4"),
-        }
-    }
-}
-
-impl Deref for Os {
-    type Target = target_lexicon::OperatingSystem;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl From<&uv_platform_tags::Arch> for Arch {
-    fn from(value: &uv_platform_tags::Arch) -> Self {
-        match value {
-            uv_platform_tags::Arch::Aarch64 => Self {
-                family: target_lexicon::Architecture::Aarch64(
-                    target_lexicon::Aarch64Architecture::Aarch64,
-                ),
-                variant: None,
-            },
-            uv_platform_tags::Arch::Armv5TEL => Self {
-                family: target_lexicon::Architecture::Arm(target_lexicon::ArmArchitecture::Armv5te),
-                variant: None,
-            },
-            uv_platform_tags::Arch::Armv6L => Self {
-                family: target_lexicon::Architecture::Arm(target_lexicon::ArmArchitecture::Armv6),
-                variant: None,
-            },
-            uv_platform_tags::Arch::Armv7L => Self {
-                family: target_lexicon::Architecture::Arm(target_lexicon::ArmArchitecture::Armv7),
-                variant: None,
-            },
-            uv_platform_tags::Arch::S390X => Self {
-                family: target_lexicon::Architecture::S390x,
-                variant: None,
-            },
-            uv_platform_tags::Arch::Powerpc => Self {
-                family: target_lexicon::Architecture::Powerpc,
-                variant: None,
-            },
-            uv_platform_tags::Arch::Powerpc64 => Self {
-                family: target_lexicon::Architecture::Powerpc64,
-                variant: None,
-            },
-            uv_platform_tags::Arch::Powerpc64Le => Self {
-                family: target_lexicon::Architecture::Powerpc64le,
-                variant: None,
-            },
-            uv_platform_tags::Arch::X86 => Self {
-                family: target_lexicon::Architecture::X86_32(
-                    target_lexicon::X86_32Architecture::I686,
-                ),
-                variant: None,
-            },
-            uv_platform_tags::Arch::X86_64 => Self {
-                family: target_lexicon::Architecture::X86_64,
-                variant: None,
-            },
-            uv_platform_tags::Arch::LoongArch64 => Self {
-                family: target_lexicon::Architecture::LoongArch64,
-                variant: None,
-            },
-            uv_platform_tags::Arch::Riscv64 => Self {
-                family: target_lexicon::Architecture::Riscv64(
-                    target_lexicon::Riscv64Architecture::Riscv64,
-                ),
-                variant: None,
-            },
-            uv_platform_tags::Arch::Wasm32 => Self {
-                family: target_lexicon::Architecture::Wasm32,
-                variant: None,
-            },
-        }
-    }
-}
-
-impl From<&uv_platform_tags::Os> for Libc {
-    fn from(value: &uv_platform_tags::Os) -> Self {
-        match value {
-            uv_platform_tags::Os::Manylinux { .. } => Self::Some(target_lexicon::Environment::Gnu),
-            uv_platform_tags::Os::Musllinux { .. } => Self::Some(target_lexicon::Environment::Musl),
-            _ => Self::None,
-        }
-    }
-}
-
-impl From<&uv_platform_tags::Os> for Os {
-    fn from(value: &uv_platform_tags::Os) -> Self {
-        match value {
-            uv_platform_tags::Os::Dragonfly { .. } => {
-                Self(target_lexicon::OperatingSystem::Dragonfly)
-            }
-            uv_platform_tags::Os::FreeBsd { .. } => Self(target_lexicon::OperatingSystem::Freebsd),
-            uv_platform_tags::Os::Haiku { .. } => Self(target_lexicon::OperatingSystem::Haiku),
-            uv_platform_tags::Os::Illumos { .. } => Self(target_lexicon::OperatingSystem::Illumos),
-            uv_platform_tags::Os::Macos { .. } => {
-                Self(target_lexicon::OperatingSystem::Darwin(None))
-            }
-            uv_platform_tags::Os::Manylinux { .. }
-            | uv_platform_tags::Os::Musllinux { .. }
-            | uv_platform_tags::Os::Android { .. } => Self(target_lexicon::OperatingSystem::Linux),
-            uv_platform_tags::Os::NetBsd { .. } => Self(target_lexicon::OperatingSystem::Netbsd),
-            uv_platform_tags::Os::OpenBsd { .. } => Self(target_lexicon::OperatingSystem::Openbsd),
-            uv_platform_tags::Os::Windows => Self(target_lexicon::OperatingSystem::Windows),
-            uv_platform_tags::Os::Pyodide { .. } => {
-                Self(target_lexicon::OperatingSystem::Emscripten)
-            }
-        }
-    }
-}

crates/uv-python/src/windows_registry.rs

@@ -1,7 +1,6 @@
 //! PEP 514 interactions with the Windows registry.
 
 use crate::managed::ManagedPythonInstallation;
-use crate::platform::Arch;
 use crate::{COMPANY_DISPLAY_NAME, COMPANY_KEY, PythonInstallationKey, PythonVersion};
 use anyhow::anyhow;
 use std::cmp::Ordering;
@@ -11,6 +10,7 @@ use std::str::FromStr;
 use target_lexicon::PointerWidth;
 use thiserror::Error;
 use tracing::debug;
+use uv_platform::Arch;
 use uv_warnings::{warn_user, warn_user_once};
 use windows_registry::{CURRENT_USER, HSTRING, Key, LOCAL_MACHINE, Value};
 use windows_result::HRESULT;

crates/uv/Cargo.toml

@@ -38,6 +38,7 @@ uv-normalize = { workspace = true }
 uv-pep440 = { workspace = true }
 uv-pep508 = { workspace = true }
 uv-performance-memory-allocator = { path = "../uv-performance-memory-allocator", optional = true }
+uv-platform = { workspace = true }
 uv-platform-tags = { workspace = true }
 uv-publish = { workspace = true }
 uv-pypi-types = { workspace = true }

crates/uv/src/commands/python/install.rs

@@ -16,6 +16,7 @@ use tracing::{debug, trace};
 
 use uv_configuration::{Preview, PreviewFeatures};
 use uv_fs::Simplified;
+use uv_platform::{Arch, Libc};
 use uv_python::downloads::{
     self, ArchRequest, DownloadResult, ManagedPythonDownload, PythonDownloadRequest,
 };
@@ -23,7 +24,6 @@ use uv_python::managed::{
     ManagedPythonInstallation, ManagedPythonInstallations, PythonMinorVersionLink,
     create_link_to_executable, python_executable_dir,
 };
-use uv_python::platform::{Arch, Libc};
 use uv_python::{
     PythonDownloads, PythonInstallationKey, PythonInstallationMinorVersionKey, PythonRequest,
     PythonVersionFile, VersionFileDiscoveryOptions, VersionFilePreference, VersionRequest,

crates/uv/tests/it/python_find.rs

@@ -2,7 +2,7 @@ use assert_fs::prelude::{FileTouch, PathChild};
 use assert_fs::{fixture::FileWriteStr, prelude::PathCreateDir};
 use indoc::indoc;
 
-use uv_python::platform::{Arch, Os};
+use uv_platform::{Arch, Os};
 use uv_static::EnvVars;
 
 use crate::common::{TestContext, uv_snapshot, venv_bin_path};

crates/uv/tests/it/python_list.rs

@@ -1,4 +1,4 @@
-use uv_python::platform::{Arch, Os};
+use uv_platform::{Arch, Os};
 use uv_static::EnvVars;
 
 use crate::common::{TestContext, uv_snapshot};

crates/uv/tests/it/python_pin.rs

@@ -5,10 +5,8 @@ use anyhow::Result;
 use assert_cmd::assert::OutputAssertExt;
 use assert_fs::fixture::{FileWriteStr, PathChild, PathCreateDir};
 use insta::assert_snapshot;
-use uv_python::{
+use uv_platform::{Arch, Os};
-    PYTHON_VERSION_FILENAME, PYTHON_VERSIONS_FILENAME,
+use uv_python::{PYTHON_VERSION_FILENAME, PYTHON_VERSIONS_FILENAME};
-    platform::{Arch, Os},
-};
 
 #[test]
 fn python_pin() {