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use std::{fs::File, path::PathBuf};
use std::fmt;
use std::error::Error;
use serde::{Serialize, Deserialize};
#[derive(Debug, Serialize, Deserialize)]
pub struct CopyPath {
pub from: String,
pub to: String,
pub recursive: Option<bool>,
}
#[derive(Debug, Serialize, Deserialize)]
pub struct Link {
pub from: String,
pub to: String,
pub symbolic: Option<bool>,
}
#[derive(Debug, Serialize, Deserialize)]
pub enum Step {
Link(Link),
Copy(CopyPath),
Shell(String),
}
#[derive(Debug, Serialize, Deserialize)]
pub struct Stage {
pub name: Option<String>,
pub steps: Option<Vec<Step>>,
pub from_file: Option<String>,
#[serde(skip_deserializing)]
pub base_path: PathBuf,
}
#[derive(Debug, Serialize, Deserialize)]
pub struct Config {
pub stages: Vec<Stage>,
#[serde(skip_deserializing)]
pub base_path: PathBuf,
}
#[derive(Debug)]
struct StageFileError {
stage_file: String,
cause: Box<dyn std::error::Error>,
}
impl Error for StageFileError {}
impl fmt::Display for StageFileError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let stage_file = &self.stage_file;
let cause = &self.cause.to_string();
write!(f, "Failed to load stage from file '{stage_file}': {cause}")
}
}
impl Config {
fn resolve_stage_file(base_path: PathBuf, file_name: &str) -> Result<Stage, Box<dyn std::error::Error>> {
let mut file_path = base_path.clone();
file_path.push(file_name);
let file = File::open(&file_path)?;
let stage: Stage = serde_yaml::from_reader(file)?;
let parent_path = file_path.parent().unwrap();
Ok(Stage { base_path: parent_path.to_path_buf(), ..stage })
}
pub fn from_file(file_name: &str) -> Result<Self, Box<dyn std::error::Error>> {
let base_path = std::env::current_dir()?;
let mut file_path = base_path.clone();
file_path.push(file_name);
let file = File::open(&file_path)?;
let loaded_config: Config = serde_yaml::from_reader(file)?;
let mut stages: Vec<Stage> = Vec::new();
for stage in loaded_config.stages {
if let Some(file_name) = stage.from_file {
match Self::resolve_stage_file(base_path.clone(), &file_name) {
Ok(loaded_stage) => stages.push(loaded_stage),
Err(err) => return Err(Box::new(StageFileError {
stage_file: file_name,
cause: err
}))
}
} else {
stages.push(Stage { base_path: base_path.clone(), ..stage });
}
}
Ok(Config { stages, base_path: base_path })
}
}
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