1 files changed, 44 insertions, 0 deletions
diff --git a/node_modules/hullabaloo-config-manager/lib/hashDependencies.js b/node_modules/hullabaloo-config-manager/lib/hashDependencies.js
new file mode 100644
index 000000000..9587cee1e
--- /dev/null
+++ b/node_modules/hullabaloo-config-manager/lib/hashDependencies.js
@@ -0,0 +1,44 @@
+'use strict'
+
+const packageHash = require('package-hash')
+const md5Hex = require('md5-hex')
+
+const errors = require('./errors')
+const readSafe = require('./readSafe')
+
+function hashFile (filename, cache) {
+  return readSafe(filename, cache)
+    .then(contents => {
+      if (!contents) throw new errors.BadDependencyError(filename)
+
+      return md5Hex(contents)
+    })
+}
+
+function hashPackage (filename, fromPackage) {
+  return packageHash(`${fromPackage}/package.json`)
+    .catch(err => {
+      throw new errors.BadDependencyError(filename, err)
+    })
+}
+
+function hashDependency (filename, fromPackage, cache) {
+  if (cache && cache.dependencyHashes && cache.dependencyHashes.has(filename)) {
+    return cache.dependencyHashes.get(filename)
+  }
+
+  const promise = fromPackage
+    ? hashPackage(filename, fromPackage)
+    : hashFile(filename, cache)
+
+  if (cache && cache.dependencyHashes) {
+    cache.dependencyHashes.set(filename, promise)
+  }
+  return promise
+}
+
+function hashDependencies (dependencies, cache) {
+  const promises = dependencies.map(item => hashDependency(item.filename, item.fromPackage, cache))
+  return Promise.all(promises)
+}
+module.exports = hashDependencies