1 files changed, 27 insertions, 0 deletions
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..f1f0ce5
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const visit = require('unist-util-visit');
+const schemes = require('./schemes.js');
+
+function plugin() {
+  return transformer;
+  function transformer(tree) {
+    visit(tree, 'link', link => {
+      if (link.url) {
+        if (link.url[0] === '/') { // Local link
+          return;
+        }
+
+        if (schemes.some(scheme => link.url.startsWith(scheme + ':'))) {
+          // Valide scheme
+          return;
+        }
+
+        link.url = '/' + link.url;
+      }
+    });
+  }
+}
+
+module.exports = plugin;
+