fix: only warn if config properties are not found (#2472)

Cargo.toml

@@ -94,6 +94,7 @@ self_update = { version = "0.41", default-features = false, features = [
 ] }
 serde = "1.0.199"
 serde_derive = "1.0.199"
+serde_ignored = "0.1"
 serde_json = { version = "1.0.116", features = [] }
 sha2 = "0.10.8"
 shell-escape = "0.1.5"

src/config/config_file/mise_toml.rs

@@ -26,7 +26,6 @@ use crate::toolset::{ToolRequest, ToolRequestSet, ToolSource, ToolVersionOptions
 use crate::{dirs, file};
 
 #[derive(Default, Deserialize)]
-#[serde(deny_unknown_fields)]
 pub struct MiseToml {
     #[serde(default, deserialize_with = "deserialize_version")]
     min_version: Option<Versioning>,
@@ -85,7 +84,10 @@ impl MiseToml {
     pub fn from_file(path: &Path) -> eyre::Result<Self> {
         trace!("parsing: {}", display_path(path));
         let body = file::read_to_string(path)?;
-        let mut rf: MiseToml = toml::from_str(&body)?;
+        let des = toml::Deserializer::new(&body);
+        let mut rf: MiseToml = serde_ignored::deserialize(des, |p| {
+            warn!("unknown field in {}: {p}", display_path(path));
+        })?;
         rf.context = BASE_CONTEXT.clone();
         rf.context
             .insert("config_root", path.parent().unwrap().to_str().unwrap());
@@ -1159,15 +1161,6 @@ mod tests {
         assert_debug_snapshot!(cf);
     }
 
-    #[test]
-    fn test_fail_with_unknown_key() {
-        reset();
-        let _ = toml::from_str::<MiseToml>(&formatdoc! {r#"
-        invalid_key = true
-        "#})
-        .unwrap_err();
-    }
-
     #[test]
     fn test_env_entries() {
         reset();

src/config/settings.rs

@@ -19,7 +19,6 @@ use crate::{config, dirs, env, file};
 #[rustfmt::skip]
 #[derive(Config, Default, Debug, Clone, Serialize)]
 #[config(partial_attr(derive(Clone, Serialize, Default)))]
-#[config(partial_attr(serde(deny_unknown_fields)))]
 pub struct Settings {
     /// push tools to the front of PATH instead of allowing modifications of PATH after activation to take precedence
     #[config(env = "MISE_ACTIVATE_AGGRESSIVE", default = false)]