76 lines
2.4 KiB
Rust
76 lines
2.4 KiB
Rust
use std::fs::{create_dir_all, read_to_string, File};
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use std::io::{ErrorKind, Write};
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use std::path::Path;
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use anyhow::{bail, Context, Result};
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use serde_derive::{Deserialize, Serialize};
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// Update the master README if fields change.
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/// Config for the program, as listed in `$XDG_CONFIG_HOME/pacdef/pacdef.yaml`.
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#[derive(Debug, Serialize, Deserialize)]
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pub struct Config {
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/// The AUR helper to use for Arch Linux.
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pub aur_helper: String,
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/// Additional arguments to pass to `aur_helper` when removing a package.
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pub aur_rm_args: Option<Vec<String>>,
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/// Warn the user when a group is not a symlink.
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pub warn_not_symlinks: bool,
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/// Backends the user does not want to use even though the binary exists.
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pub disabled_backends: Vec<String>,
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}
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impl Config {
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/// Load the config from the associated file.
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///
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/// # Errors
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///
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/// This function will return an error if the config file exists but cannot be
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/// read, its contents are not UTF-8, or the file is malformed.
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pub fn load(config_file: &Path) -> Result<Self> {
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let from_file = read_to_string(config_file);
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let content = match from_file {
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Ok(content) => content,
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Err(e) => {
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if e.kind() == ErrorKind::NotFound {
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bail!(crate::Error::ConfigFileNotFound)
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}
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bail!("unexpected error occured: {e:?}");
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}
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};
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serde_yaml::from_str(&content).context("parsing yaml config")
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}
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/// Save the instance of [`Config`] to disk.
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///
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/// # Errors
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///
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/// This function will return an error if the config file cannot be saved to disk.
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pub fn save(&self, file: &Path) -> Result<()> {
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let content = serde_yaml::to_string(&self).context("converting Config to yaml")?;
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let parent = file.parent().context("getting parent of config dir")?;
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if !parent.is_dir() {
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create_dir_all(parent)
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.with_context(|| format!("creating dir {}", parent.to_string_lossy()))?;
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}
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let mut output = File::create(file).context("creating default config file")?;
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write!(output, "{content}").context("writing default config")?;
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Ok(())
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}
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}
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impl Default for Config {
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fn default() -> Self {
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Self {
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aur_helper: "paru".into(),
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aur_rm_args: None,
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warn_not_symlinks: true,
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disabled_backends: vec![],
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}
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}
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}
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