fix core instrumentation mode detection

Author: GuillaumeLagrange

packages/core/src/index.ts

@@ -10,24 +10,24 @@ export const isBound = native_core.isBound;
 
 export const mongoMeasurement = new MongoMeasurement();
 
-export enum MeasurementMode {
-  Instrumentation = "instrumentation",
-  WallTime = "walltime",
-}
+type CodSpeedRunnerMode = "disabled" | "instrumented" | "walltime";
 
-export function getMeasurementMode(): MeasurementMode {
+export function getCodspeedRunnerMode(): CodSpeedRunnerMode {
   const isCodSpeedEnabled = process.env.CODSPEED_ENV !== undefined;
-  if (isCodSpeedEnabled) {
-    // If CODSPEED_ENV is set, check CODSPEED_RUNNER_MODE
-    if (process.env.CODSPEED_RUNNER_MODE === "walltime") {
-      return MeasurementMode.WallTime;
-    } else {
-      return MeasurementMode.Instrumentation;
-    }
+  if (!isCodSpeedEnabled) {
+    return "disabled";
+  }
+
+  // If CODSPEED_ENV is set, check CODSPEED_RUNNER_MODE
+  const codspeedRunnerMode = process.env.CODSPEED_RUNNER_MODE;
+  if (codspeedRunnerMode === "instrumentation") {
+    return "instrumented";
+  } else if (codspeedRunnerMode === "walltime") {
+    return "walltime";
   }
 
-  // Default to walltime mode when CODSPEED_ENV is not set
-  return MeasurementMode.WallTime;
+  console.warn("Unknown codspeed runner mode, defaulting to disabled");
+  return "disabled";
 }
 
 export const setupCore = () => {