forbid todo markers

crates/tools/tests/cli.rs

@@ -1,4 +1,6 @@
-use tools::{generate, gen_tests, run_rustfmt, Verify};
+use walkdir::WalkDir;
+
+use tools::{generate, gen_tests, run_rustfmt, Verify, project_root};
 
 #[test]
 fn generated_grammar_is_fresh() {
@@ -20,3 +22,25 @@ fn check_code_formatting() {
         panic!("{}. Please format the code by running `cargo format`", error);
     }
 }
+
+#[test]
+fn no_todo() {
+    WalkDir::new(project_root().join("crates")).into_iter().for_each(|e| {
+        let e = e.unwrap();
+        if e.path().extension().map(|it| it != "rs").unwrap_or(true) {
+            return;
+        }
+        if e.path().ends_with("tests/cli.rs") {
+            return;
+        }
+        let text = std::fs::read_to_string(e.path()).unwrap();
+        if text.contains("TODO") {
+            panic!(
+                "\nTODO markers should not be commited to the master branch,\n\
+                 use FIXME instead\n\
+                 {}\n",
+                e.path().display(),
+            )
+        }
+    })
+}