await metricScope()

in src/package-sources/npmjs/canary/npmjs-package-canary.lambda.ts [73:114]
35 lines of code
8 McCabe index (conditional complexity)

      await metricScope((metrics) => async () => {
        // Clear out default dimensions as we don't need those. See https://github.com/awslabs/aws-embedded-metrics-node/issues/73.
        metrics.setDimensions();
        metrics.setProperty('PackageName', packageName);
        metrics.setProperty('PackageVersion', versionState.version);
        metrics.setProperty('IsLatest', state.latest.version === versionState.version);

        if (!versionState.availableAt) {
          if (versionState.version === state.latest.version) {
            if (await constructHub.isInCatalog(packageName, versionState.version)) {
              versionState.availableAt = new Date();
            }
          } else {
            // Non-current versions will probably never make it to catalog (they're older than the
            // current version), so instead, we check whether they have TypeScript documentation.
            if (await constructHub.hasTypeScriptDocumentation(packageName, versionState.version)) {
              versionState.availableAt = new Date();
            }
          }
        }

        if (versionState.availableAt) {
          // Tells us how long it's taken for the package to make it to catalog after it was published.
          metrics.putMetric(
            MetricName.TIME_TO_CATALOG,
            (versionState.availableAt.getTime() - versionState.publishedAt.getTime()) / 1_000,
            Unit.Seconds,
          );

          // Stop tracking that version, as it's now available.
          if (versionState.version in state.pending) {
            delete state.pending[versionState.version];
          }
        } else {
          // Tells us how long we've been waiting for this version to show up, so far.
          metrics.putMetric(
            MetricName.DWELL_TIME,
            (Date.now() - versionState.publishedAt.getTime()) / 1_000,
            Unit.Seconds,
          );
        }
      })();