Re: [PATCH 2/3] fsmonitor: add assertion that fsmonitor is valid to check_removed

Validate that fsmonitor is valid to futureproof against bugs where
check_removed might be called from places that haven't refreshed.

Signed-off-by: Nipunn Koorapati <redacted>
---

diff --git a/fsmonitor.h b/fsmonitor.h

@@ -49,6 +49,17 @@ void refresh_fsmonitor(struct index_state *istate);
+/*
+ * Check if refresh_fsmonitor has been called at least once.
+ * refresh_fsmonitor is idempotent. Returns true if fsmonitor is
+ * not enabled (since the state will be "fresh" w/ CE_FSMONITOR_VALID unset)
+ * This version is useful for assertions
+ */
+static inline int is_fsmonitor_refreshed(const struct index_state *istate)
+{
+    return !core_fsmonitor || istate->fsmonitor_has_run_once;
+}