garnet/bin/setui/src/setui_config_test.rs

// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

use anyhow::{bail, Context, Error};
use settings::{EnabledServicesConfiguration, ServiceFlags};
use std::fs::File;
use std::io::Read;

fn main() -> Result<(), Error> {
    let mut args = std::env::args();
    if args.len() < 2 {
        bail!("Not enough args");
    }

    // Skip program name.
    let _ = args.next();
    {
        // Get path to config.
        let path = &args.next().unwrap();
        let mut file =
            File::open(path).with_context(|| format!("Couldn't open config path `{}`", path))?;
        let mut config_string = String::new();
        file.read_to_string(&mut config_string).context("Couldn't read services configuration")?;
        let _ = serde_json::from_str::<EnabledServicesConfiguration>(&config_string)
            .context("Failed to deserialize services configuration")?;
    }

    // There might be an additional path for flags.
    if let Some(ref path) = args.next() {
        let mut file =
            File::open(path).with_context(|| format!("Couldn't open flags path `{}`", path))?;
        let mut config_string = String::new();
        file.read_to_string(&mut config_string).context("Couldn't read flags configuration")?;
        let _ = serde_json::from_str::<ServiceFlags>(&config_string)
            .context("Failed to deserialize flag configuration")?;
    }

    Ok(())
}