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// config.rs
// Copyright (C) 2020 The Nitrocli Developers
// SPDX-License-Identifier: GPL-3.0-or-later
use std::fs;
use std::path;
use std::str::FromStr as _;
use serde::de::Error as _;
use serde::Deserialize as _;
use crate::args;
use anyhow::Context as _;
/// The name of nitrocli's configuration file relative to the
/// application configuration directory.
///
/// The application configuration directory is determined using the
/// `directories` crate. For Unix, it is `$XDG_CONFIG_HOME/nitrocli`
/// (defaults to `$HOME/.config/nitrocli`).
const CONFIG_FILE: &str = "config.toml";
/// The configuration for nitrocli, usually read from configuration
/// files and environment variables.
#[derive(Clone, Debug, Default, PartialEq, merge::Merge, serde::Deserialize)]
pub struct Config {
/// The model to connect to.
pub model: Option<args::DeviceModel>,
/// The serial numbers of the device to connect to.
#[merge(strategy = merge::vec::overwrite_empty)]
#[serde(default, deserialize_with = "deserialize_serial_number_vec")]
pub serial_numbers: Vec<nitrokey::SerialNumber>,
/// The USB path of the device to connect to.
pub usb_path: Option<String>,
/// Whether to bypass the cache for all secrets or not.
#[merge(strategy = merge::bool::overwrite_false)]
#[serde(default)]
pub no_cache: bool,
/// The log level.
#[merge(strategy = merge::num::overwrite_zero)]
#[serde(default)]
pub verbosity: u8,
}
fn deserialize_serial_number_vec<'de, D>(d: D) -> Result<Vec<nitrokey::SerialNumber>, D::Error>
where
D: serde::Deserializer<'de>,
{
let strings = Vec::<String>::deserialize(d).map_err(D::Error::custom)?;
let result = strings
.iter()
.filter(|s| !s.is_empty())
.map(|s| nitrokey::SerialNumber::from_str(s))
.collect::<Result<_, _>>();
result.map_err(D::Error::custom)
}
impl Config {
pub fn load() -> anyhow::Result<Self> {
use merge::Merge as _;
let mut config = Config::default();
if let Some(user_config) = load_user_config()? {
config.merge(user_config);
}
config.merge(load_env_config()?);
Ok(config)
}
pub fn update(&mut self, args: &args::Args) {
if args.model.is_some() {
self.model = args.model;
}
if !args.serial_numbers.is_empty() {
self.serial_numbers = args.serial_numbers.clone();
}
if args.usb_path.is_some() {
self.usb_path = args.usb_path.clone();
}
if args.no_cache {
self.no_cache = true;
}
if args.verbose > 0 {
self.verbosity = args.verbose;
}
}
}
fn load_user_config() -> anyhow::Result<Option<Config>> {
let project_dirs = directories::ProjectDirs::from("", "", "nitrocli")
.context("Could not determine the nitrocli application directory")?;
let path = project_dirs.config_dir().join(CONFIG_FILE);
if path.is_file() {
read_config_file(&path).map(Some)
} else {
Ok(None)
}
}
fn load_env_config() -> anyhow::Result<Config> {
envy::prefixed("NITROCLI_")
.from_env()
.context("Failed to parse environment variables")
}
pub fn read_config_file(path: &path::Path) -> anyhow::Result<Config> {
let s = fs::read_to_string(path)
.with_context(|| format!("Failed to read configuration file '{}'", path.display()))?;
toml::from_str(&s)
.with_context(|| format!("Failed to parse configuration file '{}'", path.display()))
}
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