Jedrzej Stuczynski
65 lines
2.1 KiB
Rust
65 lines
2.1 KiB
Rust
use handlebars::Handlebars;
|
|
use serde::de::DeserializeOwned;
|
|
use serde::Serialize;
|
|
use std::path::PathBuf;
|
|
use std::{fs, io};
|
|
|
|
pub trait NymConfig: Default + Serialize + DeserializeOwned {
|
|
fn template() -> &'static str;
|
|
|
|
fn config_file_name() -> String;
|
|
|
|
fn default_root_directory() -> PathBuf;
|
|
|
|
// default, most probable, implementations; can be easily overridden where required
|
|
fn default_config_directory(id: Option<&str>) -> PathBuf {
|
|
Self::default_root_directory()
|
|
.join(id.unwrap_or(""))
|
|
.join("config")
|
|
}
|
|
|
|
fn default_data_directory(id: Option<&str>) -> PathBuf {
|
|
Self::default_root_directory()
|
|
.join(id.unwrap_or(""))
|
|
.join("data")
|
|
}
|
|
|
|
fn root_directory(&self) -> PathBuf;
|
|
fn config_directory(&self) -> PathBuf;
|
|
fn data_directory(&self) -> PathBuf;
|
|
|
|
fn save_to_file(&self, custom_location: Option<PathBuf>) -> io::Result<()> {
|
|
let reg = Handlebars::new();
|
|
// it's whoever is implementing the trait responsibility to make sure you can execute your own template on your data
|
|
let templated_config = reg.render_template(Self::template(), self).unwrap();
|
|
|
|
// make sure the whole directory structure actually exists
|
|
match custom_location.clone() {
|
|
Some(loc) => {
|
|
if let Some(parent_dir) = loc.parent() {
|
|
fs::create_dir_all(parent_dir)
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}
|
|
None => fs::create_dir_all(self.config_directory()),
|
|
}?;
|
|
|
|
fs::write(
|
|
custom_location
|
|
.unwrap_or_else(|| self.config_directory().join(Self::config_file_name())),
|
|
templated_config,
|
|
)
|
|
}
|
|
|
|
fn load_from_file(custom_location: Option<PathBuf>, id: Option<&str>) -> io::Result<Self> {
|
|
let config_contents = fs::read_to_string(
|
|
custom_location
|
|
.unwrap_or_else(|| Self::default_config_directory(id).join("config.toml")),
|
|
)?;
|
|
|
|
toml::from_str(&config_contents)
|
|
.map_err(|toml_err| io::Error::new(io::ErrorKind::Other, toml_err))
|
|
}
|
|
}
|