Add global config fallback

Co-authored-by: Christian Duerr <contact@christianduerr.com>

CHANGELOG.md

@@ -20,6 +20,7 @@ Notable changes to the `alacritty_terminal` crate are documented in its
 - IPC config retrieval using `alacritty msg get-config`
 - Multi-sequence touch zoom sequences
 - Vi action `Y` keybind, yank to the end of line
+- Add `/etc/alacritty/alacritty.toml` fallback for system wide configuration
 
 ### Changed
 

README.md

@@ -68,6 +68,7 @@ following locations:
 2. `$XDG_CONFIG_HOME/alacritty.toml`
 3. `$HOME/.config/alacritty/alacritty.toml`
 4. `$HOME/.alacritty.toml`
+5. `/etc/alacritty/alacritty.toml`
 
 On Windows, the config file will be looked for in:
 

alacritty/src/config/mod.rs

@@ -368,6 +368,7 @@ fn prune_yaml_nulls(value: &mut serde_yaml::Value, warn_pruned: bool) {
 /// 2. $XDG_CONFIG_HOME/alacritty.toml
 /// 3. $HOME/.config/alacritty/alacritty.toml
 /// 4. $HOME/.alacritty.toml
+/// 5. /etc/alacritty/alacritty.toml
 #[cfg(not(windows))]
 pub fn installed_config(suffix: &str) -> Option<PathBuf> {
     let file_name = format!("alacritty.{suffix}");
@@ -390,7 +391,9 @@ pub fn installed_config(suffix: &str) -> Option<PathBuf> {
                     return Some(fallback);
                 }
             }
-            None
+
+            let fallback = PathBuf::from("/etc/alacritty").join(&file_name);
+            fallback.exists().then_some(fallback)
         })
 }
 

extra/man/alacritty.1.scd

@@ -72,6 +72,7 @@ set of features with high performance.
 		. _$XDG_CONFIG_HOME/alacritty.toml_
 		. _$HOME/.config/alacritty/alacritty.toml_
 		. _$HOME/.alacritty.toml_
+		. _/etc/alacritty/alacritty.toml_
 
 	On Windows, the config file will be looked for in:
 

extra/man/alacritty.5.scd

@@ -18,6 +18,7 @@ following locations on UNIX systems:
 . _$XDG_CONFIG_HOME/alacritty.toml_
 . _$HOME/.config/alacritty/alacritty.toml_
 . _$HOME/.alacritty.toml_
+. _/etc/alacritty/alacritty.toml_
 
 On Windows, the config file will be looked for in: