Simple solution to validate toml in issue #106104

Cargo.lock

@@ -5605,8 +5605,10 @@ dependencies = [
  "lazy_static",
  "miropt-test-tools",
  "regex",
+ "serde",
  "semver",
  "termcolor",
+ "toml",
  "walkdir",
 ]
 
@@ -5690,9 +5692,9 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "0.5.7"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75cf45bb0bef80604d001caaec0d09da99611b3c0fd39d3080468875cdb65645"
+checksum = "1333c76748e868a4d9d1017b5ab53171dfd095f70c712fdb4653a406547f598f"
 dependencies = [
  "serde",
 ]

src/tools/tidy/Cargo.toml

@@ -13,6 +13,8 @@ walkdir = "2"
 ignore = "0.4.18"
 semver = "1.0.14"
 termcolor = "1.1.3"
+toml = "0.5.10"
+serde = { version = "1.0", features = ["derive"] }
 
 [[bin]]
 name = "rust-tidy"

src/tools/tidy/src/lib.rs

@@ -64,6 +64,7 @@ pub mod pal;
 pub mod primitive_docs;
 pub mod style;
 pub mod target_specific_tests;
+pub mod triagebot;
 pub mod ui_tests;
 pub mod unit_tests;
 pub mod unstable_book;

src/tools/tidy/src/triagebot.rs

@@ -0,0 +1,24 @@
+use crate::walk::{filter_dirs, walk};
+use serde::Deserialize;
+use std::path::Path;
+use toml::Value;
+
+#[derive(Deserialize)]
+struct Config {}
+
+pub fn check(path: &Path, bad: &mut bool) {
+    walk(path, &mut |path| filter_dirs(path), &mut |entry, contents| {
+        let file = entry.path();
+        let filename = file.file_name().unwrap();
+        if filename != "triagebot.toml" {
+            return;
+        }
+        let conf = contents.parse::<Value>();
+        match conf {
+            Ok(_) => {}
+            Err(_err) => {
+                tidy_error!(bad, "{} is an invalid toml file", file.display())
+            }
+        }
+    });
+}