planning

node_modules/remark-rehype/index.js

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+'use strict'
+
+var mdast2hast = require('mdast-util-to-hast')
+
+module.exports = remark2rehype
+
+// Attacher.
+// If a destination is given, runs the destination with the new hast tree
+// (bridge mode).
+// Without destination, returns the tree: further plugins run on that tree
+// (mutate mode).
+function remark2rehype(destination, options) {
+  if (destination && !destination.process) {
+    options = destination
+    destination = null
+  }
+
+  return destination ? bridge(destination, options) : mutate(options)
+}
+
+// Bridge mode.
+// Runs the destination with the new hast tree.
+function bridge(destination, options) {
+  return transformer
+
+  function transformer(node, file, next) {
+    destination.run(mdast2hast(node, options), file, done)
+
+    function done(err) {
+      next(err)
+    }
+  }
+}
+
+// Mutate-mode.
+// Further transformers run on the hast tree.
+function mutate(options) {
+  return transformer
+
+  function transformer(node) {
+    return mdast2hast(node, options)
+  }
+}