Handle specific version for plugins

lib/generate/plugin.js

@@ -156,17 +156,16 @@ Plugin.prototype.copyAssets = function(out, options) {
 // Install a list of plugin
 Plugin.install = function(options) {
     // Normalize list of plugins
-    var plugins = Plugin.normalizeNames(options.plugins);
+    var plugins = Plugin.normalizeList(options.plugins);
 
-    // Remove defaults plugins
-    plugins = _.without.apply(null, [plugins].concat(Plugin.defaults));
-
-    return _.reduce(plugins, function(prev, name) {
+    // Install plugins one by one
+    return _.reduce(plugins, function(prev, plugin) {
         return prev.then(function() {
-            var fullname = "gitbook-plugin-"+name;
-            console.log("Install plugin", name, "from npm ("+fullname+")");
+            var fullname = "gitbook-plugin-"+plugin.name;
+            console.log("Install plugin", plugin.name, "from npm ("+fullname+") with version", (plugin.version || "*"));
             return Q.nfcall(npmi, {
                 'name': fullname,
+                'version': plugin.version,
                 'path': options.input,
                 'npmLoad': {
                     'loglevel': 'silent',
@@ -178,33 +177,49 @@ Plugin.install = function(options) {
     }, Q());
 };
 
-// Normalize a list of plugin name to use
-Plugin.normalizeNames = function(names) {
+// Normalize a list of plugins to use
+Plugin.normalizeList = function(plugins) {
     // Normalize list to an array
-    names = _.isString(names) ? names.split(",") : (names || []);
+    plugins = _.isString(plugins) ? plugins.split(",") : (plugins || []);
+
+    // Divide as {name, version} to handle format like "myplugin@1.0.0"
+    plugins = _.map(plugins, function(plugin) {
+        var parts = plugin.split("@");
+        return {
+            'name': parts[0],
+            'version': parts[1] // optional
+        }
+    });
 
     // List plugins to remove
-    var toremove = _.chain(names)
-    .filter(function(name) {
-        return name.length > 0 && name[0] == "-";
+    var toremove = _.chain(plugins)
+    .filter(function(plugin) {
+        return plugin.name.length > 0 && plugin.name[0] == "-";
     })
-    .map(function(name) {
-        return name.slice(1);
+    .map(function(plugin) {
+        return plugin.name.slice(1);
     })
     .value();
 
     // Merge with defaults
-    names = _.chain(names)
-    .concat(Plugin.defaults)
+    plugins = _.chain(plugins)
+    .concat(_.map(Plugin.defaults, function(plugin) {
+        return { 'name': plugin }
+    }))
     .uniq()
     .value();
 
-    // Remove plugins starting with
-    names = _.filter(names, function(name) {
-        return !_.contains(toremove, name) && !(name.length > 0 && name[0] == "-");
+    // Build final list
+    plugins = _.filter(plugins, function(plugin) {
+        return !_.contains(toremove, plugin.name) && !(plugin.name.length > 0 && plugin.name[0] == "-");
     });
 
-    return names;
+    return plugins;
+};
+
+// Normalize a list of plugin name to use
+Plugin.normalizeNames = function(plugins) {
+    return _.pluck(Plugin.normalizeList(plugins), "name");
 };
 
 // Extract data from a list of plugin
@@ -302,7 +317,7 @@ Plugin.fromList = function(names, root, generator, options) {
     });
 };
 
-// Default plugins
+// Default plugins added to each books
 Plugin.defaults = [
     "mathjax"
 ];