Add warning message when gitbook version to use is not fixed

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/configuration.js b/lib/configuration.js
index 678bfe7..ad4f445 100644
--- a/lib/configuration.js
+++ b/lib/configuration.js
@@ -2,7 +2,9 @@ var _ = require("lodash");
 var Q = require("q");
 var path = require("path");
 var npmi = require('npmi');
+var semver = require('semver');
 
+var pkg = require('../package.json');
 var fs = require("./utils/fs");
 
 // Default plugins added to each books
@@ -98,6 +100,13 @@ Configuration.prototype.load = function() {
         that.options.defaultsPlugins = normalizePluginsList(that.options.defaultsPlugins || "");
         that.options.plugins = _.union(that.options.plugins, that.options.defaultsPlugins);
         that.options.plugins = _.uniq(that.options.plugins, "name");
+
+        if (!semver.satisfies(pkg.version, that.options.gitbook)) {
+            throw "GitBook version doesn't satisfy version required by the book: "+that.options.gitbook;
+        }
+        if (that.options.gitbook == "*") {
+            that.book.log.warn.ln("you should specify a gitbook version to use in your book.json, for example: "+(_.first(pkg.version.split("."))+".x.x"));
+        }
     });
 };
 
@@ -164,6 +173,9 @@ Configuration.DEFAULT = {
     "isbn": null,
     "language": "en",
 
+    // version of gitbook to use
+    "gitbook": "*",
+
     // Structure
     "structure": {
         "langs": "LANGS.md",