added shared data field and tests

src/config/mod.rs

@@ -17,7 +17,7 @@ use evdev::Key;
 use keymap::Keymap;
 use modmap::Modmap;
 use nix::sys::inotify::{AddWatchFlags, InitFlags, Inotify};
-use serde::{Deserialize, Deserializer};
+use serde::{Deserialize, Deserializer, de::IgnoredAny};
 use std::{collections::HashMap, error, fs, path::PathBuf, time::SystemTime};
 
 use self::{
@@ -40,6 +40,11 @@ pub struct Config {
     #[serde(default)]
     pub keypress_delay_ms: u64,
 
+    // Data is not used by any part of the application.
+    // but can be used with Anchors and Aliases
+    #[serde(default)]
+    pub shared: IgnoredAny,
+
     // Internals
     #[serde(skip)]
     pub modify_time: Option<SystemTime>,

src/config/tests.rs

@@ -209,6 +209,46 @@ fn test_keymap_mark() {
     "})
 }
 
+#[test]
+fn test_shared_data_anchor() {
+    assert_parse(indoc! {"
+    shared:
+      terminals: &terminals
+        - Gnome-terminal
+        - Kitty
+
+    modmap:
+      - remap:
+          Alt_L: Ctrl_L
+        application:
+          not: *terminals
+      - remap:
+          Shift_R: Win_R
+        application:
+          only: Google-chrome
+    "})
+}
+
+#[test]
+#[should_panic]
+fn test_fail_on_data_outside_of_config_model() {
+    assert_parse(indoc! {"
+    terminals: &terminals
+      - Gnome-terminal
+      - Kitty
+
+    modmap:
+      - remap:
+          Alt_L: Ctrl_L
+        application:
+          not: *terminals
+      - remap:
+          Shift_R: Win_R
+        application:
+          only: Google-chrome
+    "})
+}
+
 fn assert_parse(yaml: &str) {
     let result: Result<Config, Error> = serde_yaml::from_str(yaml);
     if let Err(e) = result {