change storage directory to ~/.local/state

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dssd"
-version = "0.1.1"
+version = "0.2.0"
 edition = "2021"
 
 [profile.release]

readme.md

@@ -3,4 +3,4 @@ DSSD: Dead Simple Secret Daemon
 
 DSSD (partially) implements [Secret Service API](https://specifications.freedesktop.org/secret-service/latest/) to
 provide a backend for [libsecret](https://wiki.gnome.org/Projects/Libsecret). DSSD is implemented with ~300 lines of
-code and compiles to a ~1M binary. The secrets are stored in an unencrypted JSON file in `~/.config/dssd`.
+code and compiles to a ~1M binary. The secrets are stored in an unencrypted JSON file in `~/.local/state/dssd`.

src/main.rs

@@ -36,23 +36,23 @@ impl Service {
     }
 
     fn save(&self) -> Result<(), Box<dyn Error>> {
-        let config_dir = get_config_directory()?;
-        std::fs::create_dir_all(&config_dir)?;
+        let state_dir = get_state_directory()?;
+        std::fs::create_dir_all(&state_dir)?;
 
         let config_file = std::fs::OpenOptions::new()
             .create(true)
             .write(true)
             .mode(0o600)
-            .open(format!("{config_dir}/secrets"))?;
+            .open(format!("{state_dir}/secrets"))?;
 
         serde_json::to_writer(config_file, self)?;
 
         Ok(())
     }
 
     fn load(&mut self, cr: &mut Crossroads) -> Result<(), Box<dyn Error>> {
-        let config_dir = get_config_directory()?;
-        if let Ok(file) = std::fs::File::open(format!("{config_dir}/secrets")) {
+        let state_dir = get_state_directory()?;
+        if let Ok(file) = std::fs::File::open(format!("{state_dir}/secrets")) {
             *self = serde_json::from_reader(file)?
         }
 
@@ -353,10 +353,10 @@ impl SessionHandle {
     }
 }
 
-fn get_config_directory() -> Result<String, VarError> {
-    let xdg_config_dir = std::env::var("XDG_CONFIG_HOME").map(|x| format!("{x}/dssd"));
-    let home_config_dir = std::env::var("HOME").map(|x| format!("{x}/.config/dssd"));
-    xdg_config_dir.or(home_config_dir)
+fn get_state_directory() -> Result<String, VarError> {
+    let xdg = std::env::var("XDG_STATE_HOME").map(|x| format!("{x}/dssd"));
+    let default = std::env::var("HOME").map(|x| format!("{x}/.local/state/dssd"));
+    xdg.or(default)
 }
 
 fn get_unix_timestamp() -> u64 {