add missing docs

crates/pacdef_core/src/path.rs

@@ -2,6 +2,10 @@ use std::{env, path::PathBuf};
 
 use anyhow::{Context, Result};
 
+const CONFIG_FILE_NAME: &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`.
 pub fn get_pacdef_group_dir() -> Result<PathBuf> {
     let mut result = get_pacdef_base_dir().context("getting pacdef base dir")?;
     result.push("groups");
@@ -27,3 +31,11 @@ fn get_xdg_config_home() -> Result<PathBuf> {
 pub fn get_home_dir() -> Result<PathBuf> {
     Ok(env::var("HOME").context("getting $HOME variable")?.into())
 }
+
+/// Get the group directory where all group files are located. This is
+/// `$XDG_CONFIG_HOME/pacdef/pacdef.yaml`.
+pub fn get_config_path() -> Result<PathBuf> {
+    let mut file = get_pacdef_base_dir().context("getting pacdef base dir for config file")?;
+    file.push(CONFIG_FILE_NAME);
+    Ok(file)
+}