Fix #273: clean the output without removing .git and .svn

lib/book.js

@@ -175,11 +175,15 @@ Book.prototype.generate = function(generator) {
 
 	// Clean output folder
 	.then(function() {
-		return fs.remove(that.options.output);
+        that.log.info("clean", that.options.generator, "generator");
+		return fs.clean(that.options.output)
+        .progress(function(p) {
+            that.log.debug.ln("remove", p.file, "("+p.i+"/"+p.count+")");
+        })
+        .then(function() {
+            that.log.info.ok();
+        });
 	})
-	.then(function() {
-        return fs.mkdirp(that.options.output);
-    })
 
 	// Create generator
 	.then(function() {

lib/utils/fs.js

@@ -1,56 +1,12 @@
 var _ = require("lodash");
 var Q = require("q");
 var tmp = require("tmp");
+var path = require("path");
 var fs = require("graceful-fs");
 var fsExtra = require("fs-extra");
 var Ignore = require("fstream-ignore");
 
-var listFiles = function(path, options) {
-    options = _.defaults(options || {}, {
-        ignoreFiles: [],
-        ignoreRules: []
-    });
-
-    var d = Q.defer();
-
-    // Our list of files
-    var files = [];
-
-    var ig = Ignore({
-        path: path,
-        ignoreFiles: options.ignoreFiles
-    });
-
-    // Add extra rules to ignore common folders
-    ig.addIgnoreRules(options.ignoreRules, '__custom_stuff');
-
-    // Push each file to our list
-    ig.on('child', function (c) {
-        files.push(
-            c.path.substr(c.root.path.length + 1) + (c.props.Directory === true ? '/' : '')
-        );
-    });
-
-    ig.on('end', function() {
-        // Normalize paths on Windows
-        if(process.platform === 'win32') {
-            return d.resolve(files.map(function(file) {
-                return file.replace(/\\/g, '/');
-            }));
-        }
-
-        // Simply return paths otherwise
-        return d.resolve(files);
-    });
-
-    ig.on('error', d.reject);
-
-    return d.promise;
-};
-
-
-
-module.exports = {
+var fsUtils = {
     tmp: {
         file: function() {
             return Q.nfcall(tmp.file.bind(tmp)).get(0)
@@ -86,5 +42,91 @@ module.exports = {
         return d.promise;
     },
     existsSync: fs.existsSync.bind(fs),
-    readFileSync: fs.readFileSync.bind(fs)
+    readFileSync: fs.readFileSync.bind(fs),
+    clean: cleanFolder
+}
+
+
+// List files in a directory
+function listFiles(root, options) {
+    options = _.defaults(options || {}, {
+        ignoreFiles: [],
+        ignoreRules: []
+    });
+
+    var d = Q.defer();
+
+    // Our list of files
+    var files = [];
+
+    var ig = Ignore({
+        path: root,
+        ignoreFiles: options.ignoreFiles
+    });
+
+    // Add extra rules to ignore common folders
+    ig.addIgnoreRules(options.ignoreRules, '__custom_stuff');
+
+    // Push each file to our list
+    ig.on('child', function (c) {
+        files.push(
+            c.path.substr(c.root.path.length + 1) + (c.props.Directory === true ? '/' : '')
+        );
+    });
+
+    ig.on('end', function() {
+        // Normalize paths on Windows
+        if(process.platform === 'win32') {
+            return d.resolve(files.map(function(file) {
+                return file.replace(/\\/g, '/');
+            }));
+        }
+
+        // Simply return paths otherwise
+        return d.resolve(files);
+    });
+
+    ig.on('error', d.reject);
+
+    return d.promise;
+}
+
+// Clean a folder without removing .git and .svn
+// Creates it if non existant
+function cleanFolder(root) {
+    if (!fs.existsSync(root)) return fsUtils.mkdirp(root);
+
+    return listFiles(root, {
+        ignoreFiles: [],
+        ignoreRules: [
+            // Skip Git and SVN stuff
+            '.git/',
+            '.svn/'
+        ]
+    })
+    .then(function(files) {
+        var d = Q.defer();
+
+        _.reduce(files, function(prev, file, i) {
+            return prev.then(function() {
+                var _file = path.join(root, file);
+
+                d.notify({
+                    i: i,
+                    count: files.length,
+                    file: _file
+                });
+                return fsUtils.remove(_file);
+            });
+        }, Q())
+        .then(function() {
+            d.resolve();
+        }, function(err) {
+            d.reject(err);
+        });
+
+        return d.promise;
+    });
 };
+
+module.exports = fsUtils;