WIP - add extractor, generate snippet_data

node_modules/eslint-module-utils/hash.js

@@ -0,0 +1,59 @@
+/**
+ * utilities for hashing config objects.
+ * basically iteratively updates hash with a JSON-like format
+ */
+"use strict"
+exports.__esModule = true
+
+const createHash = require('crypto').createHash
+
+const stringify = JSON.stringify
+
+function hashify(value, hash) {
+  if (!hash) hash = createHash('sha256')
+
+  if (value instanceof Array) {
+    hashArray(value, hash)
+  } else if (value instanceof Object) {
+    hashObject(value, hash)
+  } else {
+    hash.update(stringify(value) || 'undefined')
+  }
+
+  return hash
+}
+exports.default = hashify
+
+function hashArray(array, hash) {
+  if (!hash) hash = createHash('sha256')
+
+  hash.update('[')
+  for (let i = 0; i < array.length; i++) {
+    hashify(array[i], hash)
+    hash.update(',')
+  }
+  hash.update(']')
+
+  return hash
+}
+hashify.array = hashArray
+exports.hashArray = hashArray
+
+function hashObject(object, hash) {
+  if (!hash) hash = createHash('sha256')
+
+  hash.update("{")
+  Object.keys(object).sort().forEach(key => {
+    hash.update(stringify(key))
+    hash.update(':')
+    hashify(object[key], hash)
+    hash.update(",")
+  })
+  hash.update('}')
+
+  return hash
+}
+hashify.object = hashObject
+exports.hashObject = hashObject
+
+