Function read_initialize_roots

src/serve.rs:259–278

Peeks at the first stdin line to read the MCP `initialize` request's `roots` array, returning the local workspace root paths. The raw line is stored in `out` so the caller can replay it into the MCP transport (the server still needs to see it).

(out: &mut Option<String>)

/// stored in `out` so the caller can replay it into the MCP transport (the
/// server still needs to see it).
async fn read_initialize_roots(out: &mut Option<String>) -> Vec<std::path::PathBuf> {
    let Some(line) = read_first_non_empty_stdin_line().await else {
        return Vec::new();
    };
    *out = Some(line.trim().to_string());

    let Ok(parsed) = serde_json::from_str::<serde_json::Value>(line.trim()) else {
        return Vec::new();
    };
    let Some(roots) = parsed.pointer("/params/roots").and_then(|v| v.as_array()) else {
        return Vec::new();
    };
    roots
        .iter()
        .filter_map(|root| {
            let uri = root.get("uri").and_then(|v| v.as_str())?;
            local_path_from_mcp_root_uri(uri)
        })
        .collect()
}

/// Resolves a project from MCP `initialize` workspace roots: a root that IS a
/// registered project wins, otherwise the nearest enclosing project of any