Refactor :set to parse by deserializing values

helix-core/src/syntax.rs

@@ -216,14 +216,7 @@ impl FromStr for AutoPairConfig {
     // only do bool parsing for runtime setting
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         let enable: bool = s.parse()?;
-
-        let enable = if enable {
-            AutoPairConfig::Enable(true)
-        } else {
-            AutoPairConfig::Enable(false)
-        };
-
-        Ok(enable)
+        Ok(AutoPairConfig::Enable(enable))
     }
 }
 

helix-term/src/commands/typed.rs

@@ -852,34 +852,32 @@ pub(super) fn goto_line_number(
     Ok(())
 }
 
+/// Change config at runtime. Access nested values by dot syntax, for
+/// example to disable smart case search, use `:set search.smart-case false`.
 fn setting(
     cx: &mut compositor::Context,
     args: &[Cow<str>],
     _event: PromptEvent,
 ) -> anyhow::Result<()> {
-    let runtime_config = &mut cx.editor.config;
-
     if args.len() != 2 {
         anyhow::bail!("Bad arguments. Usage: `:set key field`");
     }
-
     let (key, arg) = (&args[0].to_lowercase(), &args[1]);
 
-    match key.as_ref() {
-        "scrolloff" => runtime_config.scrolloff = arg.parse()?,
-        "scroll-lines" => runtime_config.scroll_lines = arg.parse()?,
-        "mouse" => runtime_config.mouse = arg.parse()?,
-        "line-number" => runtime_config.line_number = arg.parse()?,
-        "middle-click_paste" => runtime_config.middle_click_paste = arg.parse()?,
-        "auto-pairs" => runtime_config.auto_pairs = arg.parse()?,
-        "auto-completion" => runtime_config.auto_completion = arg.parse()?,
-        "completion-trigger-len" => runtime_config.completion_trigger_len = arg.parse()?,
-        "auto-info" => runtime_config.auto_info = arg.parse()?,
-        "true-color" => runtime_config.true_color = arg.parse()?,
-        "search.smart-case" => runtime_config.search.smart_case = arg.parse()?,
-        "search.wrap-around" => runtime_config.search.wrap_around = arg.parse()?,
-        _ => anyhow::bail!("Unknown key `{}`.", args[0]),
-    }
+    let key_error = || anyhow::anyhow!("Unknown key `{key}`");
+    let field_error = |_| anyhow::anyhow!("Could not parse field `{arg}`");
+
+    let mut config = serde_json::to_value(&cx.editor.config).unwrap();
+    let pointer = format!("/{}", key.replace(".", "/"));
+    let value = config.pointer_mut(&pointer).ok_or_else(key_error)?;
+
+    *value = if value.is_string() {
+        // JSON strings require quotes, so we can't .parse() directly
+        serde_json::Value::String(arg.to_string())
+    } else {
+        arg.parse().map_err(field_error)?
+    };
+    cx.editor.config = serde_json::from_value(config).map_err(field_error)?;
 
     Ok(())
 }

helix-view/src/editor.rs

@@ -110,7 +110,7 @@ pub struct Config {
     /// Automatic auto-completion, automatically pop up without user trigger. Defaults to true.
     pub auto_completion: bool,
     /// Time in milliseconds since last keypress before idle timers trigger. Used for autocompletion, set to 0 for instant. Defaults to 400ms.
-    #[serde(skip_serializing, deserialize_with = "deserialize_duration_millis")]
+    #[serde(deserialize_with = "deserialize_duration_millis")]
     pub idle_timeout: Duration,
     pub completion_trigger_len: u8,
     /// Whether to display infoboxes. Defaults to true.