Greptile Summary

Replaced manual download and setup of the aarch64 musl cross-compilation toolchain from musl.cc with the cross tool for building static Linux binaries.

Key changes:

• Removed manual wget download of aarch64-linux-musl-cross.tgz from musl.cc
• Removed manual PATH setup for the downloaded toolchain
• Added use_cross: true flag to the aarch64-unknown-linux-musl matrix entry
• Added Install cross step that installs from the official cross-rs repository
• Updated build command to use cross instead of cargo when use_cross is true
• Removed the now-unnecessary CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER environment variable

This improves maintainability by using a well-maintained community tool instead of manually managing cross-compilation toolchains.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The change replaces a manual, brittle toolchain setup with a well-maintained standard tool (cross) from the official cross-rs project. The conditional logic is clean, and the approach aligns with Rust ecosystem best practices for cross-compilation.
• No files require special attention

Important Files Changed

Sequence Diagram

sequenceDiagram
    participant GHA as GitHub Actions
    participant Setup as Setup Steps
    participant CrossTool as Cross Tool
    participant Cargo as Cargo Build
    participant Artifact as Artifact Upload

    Note over GHA,Artifact: aarch64-unknown-linux-musl target build flow

    GHA->>Setup: Checkout code
    GHA->>Setup: Setup Rust toolchain
    
    alt use_cross = true
        Setup->>CrossTool: Install cross from GitHub
        CrossTool-->>Setup: cross installed
        Setup->>Cargo: cross build --release --target aarch64-unknown-linux-musl
    else use_cross = false
        Setup->>Cargo: cargo build --release --target <target>
    end
    
    Cargo-->>Setup: Build complete
    Setup->>Artifact: Prepare and upload artifacts
    Artifact-->>GHA: Build artifacts ready