move history to adana dir

adana-db/src/in_memory.rs

@@ -107,7 +107,7 @@ impl<K: Key + Clone, V: Value + Clone> DbOp<K, V> for InMemoryDb<K, V> {
             .or_else(|| Some(self.default_tree.to_string()))
     }
 
-    /// return true if the three has to be opened
+    /// return true if the tree has to be opened
     fn open_tree(&mut self, tree_name: &str) -> Option<bool> {
         if let Some(current_tree) = &self.current_tree {
             if current_tree == tree_name {

adana-shell/src/editor.rs

@@ -9,15 +9,20 @@ use rustyline::{
     Cmd, CompletionType, Config, EditMode, Editor, KeyEvent, Movement,
 };
 use rustyline_derive::*;
-use std::path::{Path, MAIN_SEPARATOR};
+use std::path::{Path, PathBuf, MAIN_SEPARATOR};
 use std::process::Command;
 
 use adana_script_core::constants::PI;
 
+const HISTORY_PATH: &str = "adana/history.txt";
+
 fn get_default_history_path() -> Option<Box<Path>> {
-    let mut home_dir = dirs::home_dir()?;
-    home_dir.push(".adana.history.txt");
-    Some(home_dir.into_boxed_path())
+    let history_path =
+        dirs::data_dir().or_else(dirs::home_dir).map(|mut pb| {
+            pb.push(PathBuf::from(HISTORY_PATH));
+            pb
+        })?;
+    Some(history_path.into_boxed_path())
 }
 
 pub fn save_history(