planning

node_modules/mdast-util-to-markdown/lib/configure.js

@@ -0,0 +1,27 @@
+module.exports = configure
+
+function configure(base, extension) {
+  var index = -1
+  var key
+
+  // First do subextensions.
+  if (extension.extensions) {
+    while (++index < extension.extensions.length) {
+      configure(base, extension.extensions[index])
+    }
+  }
+
+  for (key in extension) {
+    if (key === 'extensions') {
+      // Empty.
+    } else if (key === 'unsafe' || key === 'join') {
+      base[key] = base[key].concat(extension[key] || [])
+    } else if (key === 'handlers') {
+      base[key] = Object.assign(base[key], extension[key] || {})
+    } else {
+      base.options[key] = extension[key]
+    }
+  }
+
+  return base
+}