Feat: Pass in any bemxjst version

README.md

@@ -1,6 +1,6 @@
 # gulp-bem-xjst
 
-> Compile [bemhtml](http://en.bem.info/technology/bemhtml/v2/reference/) templates into JavaScript
+> Compiles [BEMHTML](http://en.bem.info/technology/bemhtml/v2/reference/) and BEMTREE templates into JavaScript.
 
 [![NPM Status][npm-img]][npm]
 [![Travis Status][test-img]][travis]
@@ -20,7 +20,7 @@
 
 * [Node.js 4+](https://nodejs.org/en/)
 
-## Install
+## Installation
 
 ```sh
 $ npm install gulp-bem-xjst
@@ -29,12 +29,13 @@ $ npm install gulp-bem-xjst
 ## Usage
 
 ```js
-var gulp = require('gulp');
-var bemhtml = require('gulp-bem-xjst').bemhtml;
+const gulp = require('gulp');
+const bemxjst = require('bemxjst');
+const bemhtml = require('gulp-bem-xjst').bemhtml;
 
 gulp.task('default', function () {
   return gulp.src('page.bemhtml')
-    .pipe(bemhtml())
+    .pipe(bemhtml({ bemxjst }))
     .pipe(gulp.dest('dist'));
 });
 ```
@@ -45,17 +46,17 @@ $ node -p "require('./dist/page.bemhtml.js').apply({block: 'page'});"
 
 ## API
 
-bem-xjst engines accesible via properties `bemhtml` and `bemtree`:
-```
-var engine = require('gulp-bem-xjst')[engine];
+`bem-xjst` engines accesible via properties `bemhtml` and `bemtree`:
+```js
+const engine = require('gulp-bem-xjst')[engine];
 ```
 
 ### Plugin options
 
-* *String* **exportName** — Engine handler's variable name. Default — `BEMHTML`.
-* *String* **engine** — Engine's name. Default — `BEMHTML`.
+* *String* **engine** — engine's name: `bemhtml` or `bemtree`. Default — `bemhtml`.
 * *String* **extension** — extension for file. Default — `.${engine}.js`.
+* *Module* **bemxjst** — custom `bem-xjst` version. The last `v8.x` by default.
 
-### License
+## License
 
 [MIT](./LICENSE)

index.js

@@ -18,19 +18,23 @@ var pluginName = path.basename(__dirname);
 /**
  * bem-xjst templates compiler.
  *
- * @param {{extension: string}} options - Options for generator.
- * @param {String|Function} engine - 'bemhtml' either 'bemtree' or any xjst-like engine function.
- * @returns {Stream}
+ * @param {{extension: string, bemxjst: *}} options - Options for generator.
+ * @param {String|Function} engine - either 'bemhtml', or 'bemtree', or any xjst-like engine function.
+ * @returns {TransformStream.<File, File>}
  */
 module.exports = function(options, engine) {
     options = options || {};
 
+    var module = options.bemxjst || bemxjst;
+
+    engine || (engine = options.engine || 'bemhtml');
+
     assert(typeof engine === 'string' || typeof (engine && engine.generate) === 'function', 'Invalid engine');
 
     var engineName;
     if (typeof engine === 'string') {
         engineName = engine;
-        engine = bemxjst[engine];
+        engine = module[engine];
     } else {
         engineName = (engine.engineName || engine.name || Object(engine.runtime).name).toLowerCase() || 'xjst';
     }

package.json

@@ -3,7 +3,10 @@
   "version": "3.0.0",
   "description": "bem-xjst templates compiler",
   "keywords": [
+    "gulp",
+    "plugin",
     "gulpplugin",
+    "bem",
     "bemhtml",
     "bemtree",
     "bem-xjst",
@@ -33,7 +36,7 @@
     "lint": "eslint ."
   },
   "dependencies": {
-    "bem-xjst": "^8.4.0",
+    "bem-xjst": "8.x",
     "is-stream": "^1.1.0",
     "node-eval": "^1.1.0",
     "plugin-error": "^0.1.2",