support for specific gitbook version

README.md

@@ -118,6 +118,12 @@ should output JavaScript object like
 
 ```
 
+## Force a specific gitbook version
+You can test your plugin against a specific gitbook version by providing ENV variable like ```GITBOOK_VERSION=2.6.7```. This could be used for example in [Travis-CI build matrix](https://docs.travis-ci.com/user/customizing-the-build/#Build-Matrix).
+
+## Debugging
+If you wish to see detailed output of the build and gitbook logs itself, provide ENV variable ```DEBUG=true```.
+
 ## Complete test example
 How to write simple test, using node-jasmine.
 ```js

lib/tester.js

@@ -34,7 +34,7 @@ var createBook = function(content, children) {
       });
 
       var summaryContent = '# Summary\n\n* [Introduction](README.md)' +'\n'+ summaryPages.join('\n');
-      
+
       var summary = Q.nfcall(fs.writeFile, path.join(dirPath, 'SUMMARY.md'), summaryContent);
       var readme = Q.nfcall(fs.writeFile, path.join(dirPath, 'README.md'), content);
 
@@ -135,7 +135,13 @@ var includeFiles = function(bookPath, files) {
 
 // execute 'gitbook build /temp/path/to/generated/book'
 var build = function(bookPath) {
-  return runCommand(gitbookRunnablePath(), ['build', bookPath])
+  var command = ['build', bookPath];
+  var gitbookVersion = process.env.GITBOOK_VERSION;
+  if(gitbookVersion) {
+    winston.info('Using gitbook version ' + gitbookVersion);
+    command.push('--gitbook='  + gitbookVersion);
+  }
+  return runCommand(gitbookRunnablePath(), command)
     .then(function(){return bookPath;});
 };
 

package.json

@@ -26,10 +26,10 @@
   "author": "Tomas Dvorak <todvora@gmail.com>",
   "license": "Apache 2",
   "dependencies": {
-    "cheerio": "0.19.0",
+    "cheerio": "0.20.0",
     "child-process-promise": "~1.1.0",
     "findit": "2.0.0",
-    "gitbook-cli": "1.0.1",
+    "gitbook-cli": "2.0.1",
     "lodash": "^4.2.0",
     "mkdirp": "^0.5.1",
     "q": "~1.4.1",