Add export for configure

Author: wooorm

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
+}

lib/index.js

@@ -1,9 +1,10 @@
 module.exports = toMarkdown
 
 var zwitch = require('zwitch')
+var configure = require('./configure')
 var defaultHandlers = require('./handle')
-var defaultUnsafe = require('./unsafe')
 var defaultJoin = require('./join')
+var defaultUnsafe = require('./unsafe')
 
 function toMarkdown(tree, options) {
   var settings = options || {}
@@ -64,32 +65,6 @@ function unknown(node) {
   throw new Error('Cannot handle unknown node `' + node.type + '`')
 }
 
-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
-}
-
 function joinDefinition(left, right) {
   // No blank line between adjacent definitions.
   if (left.type === 'definition' && left.type === right.type) {