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fix: detect musl/glibc at runtime for correct Claude binary download

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Previously used cfg!(target_env = "musl") which checks compile-time,
causing musl-compiled sandbox-agent to always download musl binaries
even on glibc systems like Debian/E2B.

Now checks for /lib/ld-musl-*.so.1 at runtime to detect the actual
system libc and download the correct Claude binary variant.
This commit is contained in:
Nathan Flurry 2026-01-28 04:19:35 -08:00
parent 0bbe92b344
commit cbd36eeca8
12 changed files with 228 additions and 194 deletions
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12
server/packages/agent-management/src/agents.rs
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@ -84,7 +84,9 @@ impl Platform {
pub fn detect() -> Result<Self, AgentError> {
let os = std::env::consts::OS;
let arch = std::env::consts::ARCH;
let is_musl = cfg!(target_env = "musl");
// Detect musl at runtime by checking for the musl dynamic linker
// This is more reliable than cfg!(target_env = "musl") which checks compile-time
let is_musl = Self::detect_musl_runtime();
match (os, arch, is_musl) {
("linux", "x86_64", true) => Ok(Self::LinuxX64Musl),
@ -98,6 +100,14 @@ impl Platform {
}),
}
}
/// Detect if the runtime environment uses musl libc by checking for musl dynamic linker
fn detect_musl_runtime() -> bool {
use std::path::Path;
// Check for musl dynamic linkers (x86_64 and aarch64)
Path::new("/lib/ld-musl-x86_64.so.1").exists()
|| Path::new("/lib/ld-musl-aarch64.so.1").exists()
}
}
#[derive(Debug, Clone)]