From 4ddb608563d985060d69594d1004550a680ae3bd Mon Sep 17 00:00:00 2001
From: Christian Duerr <contact@christianduerr.com>
Date: Wed, 31 Aug 2022 22:48:38 +0000
Subject: Add IPC config subcommand

This patch adds a new mechanism for changing configuration options
without editing the configuration file, by sending options to running
instances through `alacritty msg`.

Each window will load Alacritty's configuration file by default and then
accept IPC messages for config updates using the `alacritty msg config`
subcommand. By default all windows will be updated, individual windows
can be addressed using `alacritty msg config --window-id
"$ALACRITTY_WINDOW_ID"`.

Each option will replace the config's current value and cannot be reset
until Alacritty is restarted or the option is overwritten with a new
value.

Configuration options are passed in the format `field.subfield=value`,
where `value` is interpreted as yaml.

Closes #472.
---
 alacritty_config/src/lib.rs | 64 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 alacritty_config/src/lib.rs

(limited to 'alacritty_config/src')

diff --git a/alacritty_config/src/lib.rs b/alacritty_config/src/lib.rs
new file mode 100644
index 00000000..7a467650
--- /dev/null
+++ b/alacritty_config/src/lib.rs
@@ -0,0 +1,64 @@
+use std::collections::HashMap;
+use std::error::Error;
+
+use log::LevelFilter;
+use serde::Deserialize;
+use serde_yaml::Value;
+
+pub trait SerdeReplace {
+    fn replace(&mut self, key: &str, value: Value) -> Result<(), Box<dyn Error>>;
+}
+
+macro_rules! impl_replace {
+    ($($ty:ty),*$(,)*) => {
+        $(
+            impl SerdeReplace for $ty {
+                fn replace(&mut self, key: &str, value: Value) -> Result<(), Box<dyn Error>> {
+                    replace_simple(self, key, value)
+                }
+            }
+        )*
+    };
+}
+
+#[rustfmt::skip]
+impl_replace!(
+    usize, u8, u16, u32, u64, u128,
+    isize, i8, i16, i32, i64, i128,
+    f32, f64,
+    bool,
+    char,
+    String,
+    LevelFilter,
+);
+
+fn replace_simple<'de, D>(data: &mut D, key: &str, value: Value) -> Result<(), Box<dyn Error>>
+where
+    D: Deserialize<'de>,
+{
+    if !key.is_empty() {
+        let error = format!("Fields \"{}\" do not exist", key);
+        return Err(error.into());
+    }
+    *data = D::deserialize(value)?;
+
+    Ok(())
+}
+
+impl<'de, T: Deserialize<'de>> SerdeReplace for Vec<T> {
+    fn replace(&mut self, key: &str, value: Value) -> Result<(), Box<dyn Error>> {
+        replace_simple(self, key, value)
+    }
+}
+
+impl<'de, T: Deserialize<'de>> SerdeReplace for Option<T> {
+    fn replace(&mut self, key: &str, value: Value) -> Result<(), Box<dyn Error>> {
+        replace_simple(self, key, value)
+    }
+}
+
+impl<'de, T: Deserialize<'de>> SerdeReplace for HashMap<String, T> {
+    fn replace(&mut self, key: &str, value: Value) -> Result<(), Box<dyn Error>> {
+        replace_simple(self, key, value)
+    }
+}
-- 
cgit