Function getFeaturesByVersion

middleware/contextualizers/features.js:22–49

(currentVersion)

const cache = new Map()
function getFeaturesByVersion(currentVersion) {
  if (!cache.has(currentVersion)) {
    if (!allFeatures) {
      // As of Oct 2022, the `data/features/**` reading is *not* JIT.
      // The `data/features` is deliberately not ignored in nodemon.json.
      // See internal issue #2389
      allFeatures = getDeepDataByLanguage('features', 'en')
    }

    const features = {}
    // Determine whether the currentVersion belongs to the list of versions the feature is available in.
    for (const [featureName, feature] of Object.entries(allFeatures)) {
      const { versions } = feature
      const applicableVersions = getApplicableVersions(
        versions,
        path.join(ROOT, `data/features/${featureName}.yml`)
      )

      // Adding the resulting boolean to the context object gives us the ability to use
      // `{% if featureName ... %}` conditionals in content files.
      const isFeatureAvailableInCurrentVersion = applicableVersions.includes(currentVersion)
      features[featureName] = isFeatureAvailableInCurrentVersion
    }
    cache.set(currentVersion, features)
  }

  return cache.get(currentVersion)
}