feat: freeze typed metrics registry and bounded exemplars

2026-08-14 11:52:00 +03:00
parent 17c8e3a8f0
commit 8e709acea9
29 changed files with 1690 additions and 103 deletions
@@ -0,0 +1,36 @@
+use std::{fs, process::ExitCode};
+
+const SNAPSHOT: &str = "docs/schemas/metrics-registry-v1.json";
+
+fn main() -> ExitCode {
+    let rendered = match crank_metrics::render_metric_schema_json() {
+        Ok(rendered) => rendered,
+        Err(_) => {
+            eprintln!("metrics_contract_invalid");
+            return ExitCode::FAILURE;
+        }
+    };
+    let args = std::env::args().skip(1).collect::<Vec<_>>();
+    if args.is_empty() {
+        print!("{rendered}");
+        return ExitCode::SUCCESS;
+    }
+    if args.as_slice() != ["--check"] {
+        eprintln!("metrics_contract_invalid_command");
+        return ExitCode::FAILURE;
+    }
+    match fs::read_to_string(SNAPSHOT) {
+        Ok(snapshot) if snapshot == rendered => {
+            println!("metrics_contract_ok schema_version=1");
+            ExitCode::SUCCESS
+        }
+        Ok(_) => {
+            eprintln!("metrics_contract_drift");
+            ExitCode::FAILURE
+        }
+        Err(_) => {
+            eprintln!("metrics_contract_missing");
+            ExitCode::FAILURE
+        }
+    }
+}