fix(aura): auto-generate conf dir if it doesn't exist

This enables the `aura conf --gen > ...` line advertised everywhere to
work the first time.

See #864

CHANGELOG.md

@@ -8,6 +8,10 @@
   - `-s --reverse` can be turned on permanently in config.
   - `--asdeps` reinstated.
 
+#### Fixed
+
+- Auto-generate the `~/.config/aura/` directory if it doesn't exist.
+
 ## 4.0.0 (2024-07-31)
 
 Aura 4 represents a signicant body of work to port Aura from Haskell to Rust.

rust/aura-pm/src/dirs.rs

@@ -44,13 +44,17 @@ pub(crate) fn xdg_config() -> Result<PathBuf, Error> {
 }
 
 /// The location of Aura's config file.
+///
+/// `~/.config/aura/` is automatically created if it doesn't exist.
 pub(crate) fn aura_config() -> Result<PathBuf, Error> {
-    xdg_config().map(|p| p.join("aura").join("config.toml"))
-}
+    let xdg = xdg_config()?;
+    let dir = xdg.join("aura");
+
+    if dir.is_dir().not() {
+        std::fs::create_dir_all(&dir).map_err(|e| Error::Mkdir(dir.clone(), e))?;
+    }
 
-/// The previous location of Aura's config file.
-pub(crate) fn aura_config_old() -> Result<PathBuf, Error> {
-    xdg_config().map(|p| p.join("aura.toml"))
+    Ok(dir.join("config.toml"))
 }
 
 /// Fetch the path value of `$XDG_CACHE_HOME` or provide its default according

rust/aura-pm/src/env.rs

@@ -64,15 +64,7 @@ struct RawEnv {
 impl RawEnv {
     /// Attempt to read and parse settings from the filesystem.
     fn try_new() -> Option<Self> {
-        let config: PathBuf = {
-            let c = dirs::aura_config().ok()?;
-            if c.is_file() {
-                c
-            } else {
-                dirs::aura_config_old().ok()?
-            }
-        };
-
+        let config: PathBuf = dirs::aura_config().ok()?;
         debug!("Reading: {}", config.display());
         let s = std::fs::read_to_string(config).ok()?;
         basic_toml::from_str(&s).ok()