You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: build.rs
    path of file: ./repos/rustgym/metaldnn
    
    the code of the file until where you have to start completion: use std::env;
use std::path::PathBuf;
use std::process::Command;

struct TargetArgs {
    file: String,
    sdk: String,
}

fn get_target_args() -> TargetArgs {
    let targe
    
fn get_target_args() -> TargetArgs {
    let target_os = env::var("CARGO_CFG_TARGET_OS").expect("CARGO_CFG_TARGET_OS is set by cargo.");
    if target_os.contains("macos") {
        return TargetArgs {
            file: "src/macos.m".to_string(),
            sdk: "macosx".to_string(),
        };
    }
    if target_os.contains("ios") {
        return TargetArgs {
            file: "src/ios.m".to_string(),
            sdk: "iphoneos".to_string(),
        };
    }
    panic!();
}