Function apply_env_overrides

nodedb/src/config/server/env.rs:166–396

Apply environment variable overrides to a loaded `ServerConfig`. Priority order: env var > TOML value > compiled default. Handled variables: - `NODEDB_HOST` — overrides `config.host` (bind address, e.g., `0.0.0.0`) - `NODEDB_PORT_NATIVE` — overrides `config.ports.native` (default 6433) - `NODEDB_PORT_PGWIRE` — overrides `config.ports.pgwire` (default 6432) - `NODEDB_PORT_HT

(config: &mut ServerConfig)

/// (called from `main.rs`) so that the value is never passed through logging
/// code paths or stored in `ServerConfig` where it could appear in debug output.
pub fn apply_env_overrides(config: &mut ServerConfig) {
    // ── Host and ports ─────────────────────────────────────────────

    if let Ok(val) = std::env::var("NODEDB_HOST") {
        match val.trim().parse::<IpAddr>() {
            Ok(ip) => {
                tracing::info!(env_var = "NODEDB_HOST", value = %val, "environment variable override applied");
                config.server.host = ip;
            }
            Err(_) => {
                tracing::warn!(
                    env_var = "NODEDB_HOST",
                    value = %val,
                    "ignoring malformed environment variable (expected IP address), using config value"
                );
            }
        }
    }

    apply_port_env("NODEDB_PORT_NATIVE", &mut config.server.ports.native);
    apply_port_env("NODEDB_PORT_PGWIRE", &mut config.server.ports.pgwire);
    apply_port_env("NODEDB_PORT_HTTP", &mut config.server.ports.http);
    apply_optional_port_env("NODEDB_PORT_RESP", &mut config.server.ports.resp);
    apply_optional_port_env("NODEDB_PORT_ILP", &mut config.server.ports.ilp);

    if let Ok(val) = std::env::var("NODEDB_DATA_DIR") {
        let path = std::path::PathBuf::from(&val);
        tracing::info!(
            env_var = "NODEDB_DATA_DIR",
            value = %val,
            "environment variable override applied"
        );
        config.server.data_dir = path;
    }

    if let Ok(val) = std::env::var("NODEDB_MEMORY_LIMIT") {
        match parse_memory_size(&val) {
            Ok(bytes) => {
                tracing::info!(
                    env_var = "NODEDB_MEMORY_LIMIT",
                    value = %val,
                    bytes,
                    "environment variable override applied"
                );
                config.server.memory_limit = bytes;
            }
            Err(e) => {
                tracing::warn!(
                    env_var = "NODEDB_MEMORY_LIMIT",
                    value = %val,
                    error = %e,
                    "ignoring malformed environment variable, using config value"
                );
            }
        }
    }

    if let Ok(val) = std::env::var("NODEDB_NODE_ID") {