refact(config)!: use toml instead of yaml

serde_yaml is deprecated and archived. We should not depend on that.
Therefore switching to toml.

Fixes #76.

crates/pacdef/Cargo.toml

@@ -23,7 +23,7 @@ enum_dispatch = "0.3"
 
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-serde_yaml = "0.9"
+toml = "0.4"
 
 # backends
 alpm = { version = "3.0", optional = true }

crates/pacdef/src/config.rs

@@ -6,7 +6,7 @@ use anyhow::{bail, Context, Result};
 use serde::{Deserialize, Serialize};
 
 // Update the master README if fields change.
-/// Config for the program, as listed in `$XDG_CONFIG_HOME/pacdef/pacdef.yaml`.
+/// Config for the program, as listed in `$XDG_CONFIG_HOME/pacdef/pacdef.toml`.
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Config {
     /// The AUR helper to use for Arch Linux.
@@ -61,7 +61,7 @@ impl Config {
             }
         };
 
-        serde_yaml::from_str(&content).context("parsing yaml config")
+        toml::from_str(&content).context("parsing toml config")
     }
 
     /// Save the instance of [`Config`] to disk.
@@ -70,7 +70,7 @@ impl Config {
     ///
     /// This function will return an error if the config file cannot be saved to disk.
     pub fn save(&self, file: &Path) -> Result<()> {
-        let content = serde_yaml::to_string(&self).context("converting Config to yaml")?;
+        let content = toml::to_string(&self).context("converting Config to toml")?;
 
         let parent = file.parent().context("getting parent of config dir")?;
         if !parent.is_dir() {

crates/pacdef/src/main.rs

@@ -25,9 +25,9 @@ use pacdef::path::{get_config_path, get_config_path_old_version, get_group_dir};
 use pacdef::{Config, Error as PacdefError, Group};
 
 const MAJOR_UPDATE_MESSAGE: &str = "VERSION UPGRADE
-You seem to have used version 0.x of pacdef before.
-Version 1.x changes the syntax of the config files and the command line arguments.
-Check out https://github.com/steven-omaha/pacdef for new syntax information.
+You seem to have used version 1.x of pacdef before.
+In version 2.0 the config file needed to be changed from yaml to toml.
+Check out https://github.com/steven-omaha/pacdef/blob/main/README.md#configuration for new syntax information.
 This message will not appear again.
 ------";
 

crates/pacdef/src/path.rs

@@ -8,8 +8,8 @@ use std::{env, path::Path};
 use anyhow::{Context, Result};
 use path_absolutize::Absolutize;
 
-const CONFIG_FILE_NAME: &str = "pacdef.yaml";
-const CONFIG_FILE_NAME_OLD: &str = "pacdef.conf";
+const CONFIG_FILE_NAME: &str = "pacdef.toml";
+const CONFIG_FILE_NAME_OLD: &str = "pacdef.yaml";
 
 /// Get the group directory where all group files are located. This is
 /// `$XDG_CONFIG_HOME/pacdef/groups`, which defaults to `$HOME/.config/pacdef/groups`.
@@ -76,7 +76,7 @@ pub fn get_home_dir() -> Result<PathBuf> {
     Ok(env::var("HOME").context("getting $HOME variable")?.into())
 }
 
-/// Get the path to the pacdef config file. This is `$XDG_CONFIG_HOME/pacdef/pacdef.yaml`.
+/// Get the path to the pacdef config file. This is `$XDG_CONFIG_HOME/pacdef/pacdef.toml`.
 ///
 /// # Errors
 ///