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pub mod fondant_exports {
pub use directories::{ProjectDirs, UserDirs};
pub use serde::{de::DeserializeOwned, Serialize};
pub use serde_json;
pub use serde_yaml;
use std::path::{Path, PathBuf};
pub use toml;
pub fn expand_tilde<P: AsRef<Path>>(path: P) -> PathBuf {
let p = path.as_ref();
if p.starts_with("~") {
if p == Path::new("~") {
return UserDirs::new().unwrap().home_dir().to_path_buf();
} else {
let mut h = UserDirs::new().unwrap().home_dir().to_path_buf();
h.push(p.strip_prefix("~/").unwrap());
return h;
}
}
return p.to_path_buf();
}
}
use serde::{de::DeserializeOwned, Serialize};
use std::error::Error;
use std::fmt;
use std::path::Path;
#[derive(Debug)]
/// Errors that `load` and `store` can result in
pub enum FondantError {
/// Occurs when the home dir is not accessible.
/// You should probably `panic!` when this is thrown.
InvalidHomeDir,
/// Invalid toml/yaml/json config.
ConfigParseError,
/// Invalid permissions to create config dir.
/// Might occur when you set config dir to, say, `/etc/config.toml` and run without superuser.
DirCreateErr(std::io::Error),
LoadError,
FileWriteError,
FileReadError,
FileOpenError,
}
impl fmt::Display for FondantError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let suggestion_text =
"HELP: You might have insufficient permissions to perform this action.";
match self {
FondantError::InvalidHomeDir => write!(f, "Failed to find home directory!"),
FondantError::ConfigParseError => write!(f, "Invalid configuration file!"),
FondantError::DirCreateErr(_) => {
write!(f, "Failed to write to configuration directory!")
}
FondantError::LoadError => write!(f, "Failed to load configuration file!"),
FondantError::FileWriteError => {
write!(f, "Failed to write configuration file! {}", suggestion_text)
}
FondantError::FileReadError => {
write!(f, "Failed to read configuration file! {}", suggestion_text)
}
FondantError::FileOpenError => {
write!(f, "Failed to open configuration file! {}", suggestion_text)
}
}
}
}
impl Error for FondantError {}
/// Derive this trait on a struct to mark it as a 'configuration' struct.
pub trait Configure: Serialize + DeserializeOwned + Default {
fn load_file<P: AsRef<Path>>(config_file: P) -> Result<Self, FondantError>;
fn load() -> Result<Self, FondantError>;
fn store(&self) -> Result<(), FondantError>;
fn store_file<P: AsRef<Path>>(&self, config_file: P) -> Result<(), FondantError>;
}
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