vlt 0.1.0

Fast offline-first CLI for managing .env files across environments
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use std::fs;
use std::path::Path;

use anyhow::{Context, Result};
use serde::{Deserialize, Serialize};

#[derive(Debug, Default, Serialize, Deserialize)]
pub struct VltConfig {
    pub active_env: Option<String>,
}

impl VltConfig {
    pub fn load(path: &Path) -> Result<Self> {
        let contents = fs::read_to_string(path)
            .with_context(|| format!("failed to read {}", path.display()))?;

        if contents.trim().is_empty() {
            return Ok(Self::default());
        }

        toml::from_str(&contents).with_context(|| format!("failed to parse {}", path.display()))
    }

    pub fn load_or_default(path: &Path) -> Result<Self> {
        if !path.exists() {
            return Ok(Self::default());
        }

        Self::load(path)
    }

    pub fn save(&self, path: &Path) -> Result<()> {
        if let Some(parent) = path.parent() {
            fs::create_dir_all(parent)
                .with_context(|| format!("failed to create {}", parent.display()))?;
        }

        let contents = toml::to_string_pretty(self).context("failed to serialize config")?;
        fs::write(path, contents).with_context(|| format!("failed to write {}", path.display()))
    }
}