Add Book.generateFile to output a pdf

lib/book.js

@@ -237,6 +237,59 @@ Book.prototype.generateMultiLingual = function(generator) {
 	});
 };
 
+// Extract files from ebook generated
+Book.prototype.generateFile = function(output, options) {
+	var book = this;
+
+    options = _.defaults(options || {}, {
+        ebookFormat: path.extname(output).slice(1)
+    });
+    output = output || path.resolve(book.root, "book."+options.ebookFormat);
+
+    return fs.tmp.dir()
+    .then(function(tmpDir) {
+    	book.config.extend({
+    		output: tmpDir
+    	});
+
+        return book.generate(options.ebookFormat)
+        .then(function(_options) {
+            var copyFile = function(lang) {
+                var _outputFile = output;
+                var _tmpDir = tmpDir;
+
+                if (lang) {
+                    _outputFile = _outputFile.slice(0, -path.extname(_outputFile).length)+"_"+lang+path.extname(_outputFile);
+                    _tmpDir = path.join(_tmpDir, lang);
+                }
+
+                book.logInfo("copy ebook to", output);
+                return fs.copy(
+                    path.join(_tmpDir, "index."+options.ebookFormat),
+                    _outputFile
+                );
+            };
+
+            // Multi-langs book
+            return Q()
+            .then(function() {
+                if (book.isMultilingual()) {
+                    return Q.all(
+                        _.map(book.langs, function(lang) {
+                            return copyFile(lang.lang);
+                        })
+                    );
+                } else {
+                    return copyFile();
+                }
+            })
+            .then(function() {
+                return fs.remove(tmpDir);
+            });
+        });
+    });
+};
+
 // Parse list of plugins
 Book.prototype.parsePlugins = function() {
 	var that = this;

lib/configuration.js

@@ -101,6 +101,11 @@ Configuration.prototype.load = function() {
     });
 };
 
+// Extend the configuration
+Configuration.prototype.extend = function(options) {
+    _.extend(this.options, options);
+};
+
 // Get structure file
 Configuration.prototype.getStructure = function(name) {
     return this.options.structure[name].split(".").slice(0, -1).join(".");

lib/index.js

@@ -53,6 +53,30 @@ module.exports = {
 			}
 		},
 
+		// Build  an ebook and output it
+		{
+			name: "pdf [book] [output]",
+			description: "build a book to pdf",
+			options: [
+				LOG_OPTION
+			],
+			exec: function(args, kwargs) {
+				var input = args[0] || process.cwd();
+				var output = args[1];
+
+				var book = new Book(input, _.extend({}, {
+					'logLevel': Book.LOG_LEVELS[(kwargs.log).toUpperCase()]
+				}));
+
+				return book.parse()
+				.then(function() {
+					return book.generateFile(output, {
+						ebookFormat: "pdf"
+					});
+				});
+			}
+		},
+
 		// Build and serve a book
 		{
 			name: "serve [book]",

lib/utils/fs.js

@@ -64,8 +64,12 @@ var getFiles = function(path) {
 
 module.exports = {
     tmp: {
-        file: Q.denodeify(tmp.file.bind(tmp)),
-        dir: Q.denodeify(tmp.dir.bind(tmp))
+        file: function() {
+            return Q.nfcall(tmp.file.bind(tmp)).get(0)
+        },
+        dir: function() {
+            return Q.nfcall(tmp.dir.bind(tmp)).get(0)
+        }
     },
     list: getFiles,
     stat: Q.denodeify(fs.stat),

lib/utils/git.js

@@ -59,7 +59,7 @@ function cloneGitRepo(host, ref) {
 	// Create temporary folder to store git repos
 	.then(function() {
 		if (GIT_TMP) return;
-		return fs.tmp.dir().get(0)
+		return fs.tmp.dir()
 			.then(function(_tmp) {
 				GIT_TMP = _tmp;
 			});