From f838a1bdd9bd815c9dbe3498dba213aef9d29d86 Mon Sep 17 00:00:00 2001
From: Zanie Blue <contact@zanie.dev>
Date: Sat, 8 Jun 2024 09:06:06 -0500
Subject: [PATCH] Add support for musl Python toolchain fetches

---
 Cargo.lock                          |  1 +
 Cargo.toml                          |  1 +
 crates/uv-toolchain/Cargo.toml      |  1 +
 crates/uv-toolchain/src/platform.rs | 17 +++++++++++------
 4 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 4f146c5ad535..744cb82168f0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4922,6 +4922,7 @@ dependencies = [
  "schemars",
  "serde",
  "serde_json",
+ "target-lexicon",
  "temp-env",
  "tempfile",
  "test-log",
diff --git a/Cargo.toml b/Cargo.toml
index e65ccd6d6a72..fbbfc31ee746 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -120,6 +120,7 @@ serde = { version = "1.0.197", features = ["derive"] }
 serde_json = { version = "1.0.114" }
 sha2 = { version = "0.10.8" }
 sys-info = { version = "0.9.1" }
+target-lexicon = {version = "0.12.14" }
 tempfile = { version = "3.9.0" }
 textwrap = { version = "0.16.1" }
 thiserror = { version = "1.0.56" }
diff --git a/crates/uv-toolchain/Cargo.toml b/crates/uv-toolchain/Cargo.toml
index c64bab677893..4e870ccdc8c9 100644
--- a/crates/uv-toolchain/Cargo.toml
+++ b/crates/uv-toolchain/Cargo.toml
@@ -41,6 +41,7 @@ same-file = { workspace = true }
 schemars = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
+target-lexicon = { workspace = true }
 tempfile = { workspace = true }
 thiserror = { workspace = true }
 tokio-util = { workspace = true, features = ["compat"] }
diff --git a/crates/uv-toolchain/src/platform.rs b/crates/uv-toolchain/src/platform.rs
index 2506ea9b02f2..dd116b652d28 100644
--- a/crates/uv-toolchain/src/platform.rs
+++ b/crates/uv-toolchain/src/platform.rs
@@ -1,7 +1,4 @@
-use std::{
-    fmt::{self},
-    str::FromStr,
-};
+use std::{fmt, str::FromStr};
 use thiserror::Error;
 
 /// All supported operating systems.
@@ -130,10 +127,18 @@ impl Arch {
 
 impl Libc {
     pub(crate) fn from_env() -> Self {
-        // TODO(zanieb): Perform this lookup
         match std::env::consts::OS {
             // Supported platforms.
-            "linux" => Libc::Gnu,
+            "linux" => {
+                let environment = target_lexicon::HOST.environment.into_str();
+                if environment.starts_with("gnu") || environment == "linuxkernel" {
+                    Libc::Gnu
+                } else if environment.starts_with("musl") {
+                    Libc::Musl
+                } else {
+                    Libc::None
+                }
+            }
             "windows" | "macos" => Libc::None,
             // Platforms without explicit support.
             _ => Libc::None,