fix: cleanup messages between files (tree.messages)

lib/api.js

@@ -87,29 +87,7 @@ var api = {
 
         return node
       })
-  },
-  /**
-   * Tree messages to store and pass metadata between plugins
-   *
-   * @memberof tree
-   * @type {Array} messages
-   *
-   * @example
-   * ```js
-   * export default function plugin (options = {}) {
-   *   return function (tree) {
-   *      tree.messages.push({
-   *        type: 'dependency',
-   *        file: 'path/to/dependency.html',
-   *        from: tree.options.from
-   *      })
-   *
-   *      return tree
-   *   }
-   * }
-   * ```
-   */
-  messages: []
+  }
 }
 
 /**
@@ -124,7 +102,6 @@ var api = {
 module.exports = function (tree) {
   tree.walk = api.walk
   tree.match = api.match
-  tree.messages = api.messages
 }
 
 module.exports.walk = api.walk

lib/index.js

@@ -99,6 +99,32 @@ PostHTML.prototype.process = function (tree, options) {
     : parser(tree, options)
 
   tree.options = options
+
+  /**
+   * Messages to store and pass metadata
+   *
+   * @memberof tree
+   *
+   * @type {Array} messages
+   *
+   * @example
+   * ```js
+   * module.exports = function plugin (options = {}) {
+   *   return function (tree) {
+   *      const message = {
+   *        type: 'dependency',
+   *        file: 'path/to/dependency.html',
+   *        from: tree.options.from
+   *      }
+   *
+   *      tree.messages.push(message)
+   *
+   *      return tree
+   *   }
+   * }
+   * ```
+   */
+  tree.messages = []
   tree.processor = this
 
   // sync mode
@@ -227,7 +253,7 @@ function tryCatch (tryFn, catchFn) {
   }
 }
 
- /**
+/**
  * Wraps the PostHTMLTree within an object using a getter to render HTML on demand.
  *
  * @private