Several improvements:

- Add hexo.execFilter/execFilterSync as aliases for hexo.extend.filter.exec/execSync
- Add before_generate, after_generate filters
- Move post rendering to before_generate filters
- Render Swig tags in post.render
- Change the output of "hexo list post/page" command
- Parse special date format in source files and fallback to file stats if parsing failed

lib/box/index.js

@@ -13,7 +13,7 @@ var escapeRegExp = util.escapeRegExp;
 var join = pathFn.join;
 var sep = pathFn.sep;
 
-var patternNoob = new Pattern(function(){
+var defaultPattern = new Pattern(function(){
   return {};
 });
 
@@ -85,7 +85,7 @@ function escapeBackslashWindows(path){
 Box.prototype.addProcessor = function(pattern, fn){
   if (!fn && typeof pattern === 'function'){
     fn = pattern;
-    pattern = patternNoob;
+    pattern = defaultPattern;
   }
 
   if (typeof fn !== 'function') throw new TypeError('fn must be a function');
@@ -104,7 +104,7 @@ Box.prototype.process = function(callback){
     if (!exist) return;
     return self._loadFiles();
   }).then(function(files){
-    if (files) return self._process(files);
+    if (files && files.length) return self._process(files);
   }).nodeify(callback);
 };
 
@@ -219,7 +219,7 @@ Box.prototype._handleUpdatedFile = function(path){
     self.statStore[path] = stats;
 
     if (!cache){
-      ctx.log.info('Added: %s', chalk.magenta(id));
+      ctx.log.debug('Added: %s', chalk.magenta(id));
 
       return Cache.insert({
         _id: id,
@@ -230,14 +230,14 @@ Box.prototype._handleUpdatedFile = function(path){
         path: path
       });
     } else if (cache.shasum === shasum){
-      ctx.log.info('Unchanged: %s', chalk.magenta(id));
+      ctx.log.debug('Unchanged: %s', chalk.magenta(id));
 
       return {
         type: 'skip',
         path: path
       };
     } else {
-      ctx.log.info('Updated: %s', chalk.magenta(id));
+      ctx.log.debug('Updated: %s', chalk.magenta(id));
 
       cache.shasum = shasum;
       cache.modified = stats.mtime;

lib/hexo/index.js

@@ -151,7 +151,7 @@ Hexo.prototype.init = function(){
   ], function(name){
     return require('./' + name)(self);
   }).then(function(){
-    return self.extend.filter.exec('after_init', null, {context: self});
+    return self.execFilter('after_init', null, {context: self});
   }).then(function(){
     // Ready to go!
     self.emit('ready');
@@ -263,7 +263,6 @@ Hexo.prototype._generate = function(options){
   this._isGenerating = true;
 
   var config = this.config;
-  var siteLocals = _.clone(this.locals);
   var generators = this.extend.generator.list();
   var route = this.route;
   var keys = Object.keys(generators);
@@ -272,6 +271,7 @@ Hexo.prototype._generate = function(options){
   var log = this.log;
   var theme = this.theme;
   var newRouteList = [];
+  var siteLocals = {};
 
   this.emit('generateBefore');
 
@@ -284,7 +284,6 @@ Hexo.prototype._generate = function(options){
     this.url = config.url + config.root + path;
   }
 
-  Locals.prototype.site = siteLocals;
   Locals.prototype.config = config;
   Locals.prototype.theme = _.extend({}, config, theme.config, config.theme_config);
   Locals.prototype._ = _;
@@ -293,18 +292,28 @@ Hexo.prototype._generate = function(options){
   Locals.prototype.env = this.env;
   Locals.prototype.view_dir = pathFn.join(this.theme_dir, 'layout') + sep;
 
-  return Promise.reduce(keys, function(result, key){
-    var generator = generators[key];
-    var start = process.hrtime();
+  // Run before_generate filters
+  return this.execFilter('before_generate', null, {context: this})
+  .then(function(){
+    siteLocals = _.clone(self.locals);
+    Locals.prototype.site = siteLocals;
 
-    return generator.call(self, siteLocals).then(function(data){
-      var interval = prettyHrtime(process.hrtime(start));
+    // Run generators
+    return Promise.reduce(keys, function(result, key){
+      var generator = generators[key];
+      var start = process.hrtime();
 
-      log.debug('Generator in %s: %s', chalk.cyan(interval), chalk.magenta(key));
+      return generator.call(self, siteLocals).then(function(data){
+        var interval = prettyHrtime(process.hrtime(start));
 
-      return data ? result.concat(data) : data;
-    });
-  }, []).each(function(item){
+        log.debug('Generator in %s: %s', chalk.cyan(interval), chalk.magenta(key));
+
+        return data ? result.concat(data) : data;
+      });
+    }, []);
+  })
+  .each(function(item){
+    // Add routes
     if (item.path == null) return;
 
     var path = route.format(item.path);
@@ -326,7 +335,7 @@ Hexo.prototype._generate = function(options){
     var locals = new Locals(path, data);
     var layoutLength = layout.length;
 
-    return self.extend.filter.exec('template_locals', locals, {context: self})
+    return self.execFilter('template_locals', locals, {context: self})
     .then(function(locals){
       route.set(path, function(){
         var view, name;
@@ -345,13 +354,17 @@ Hexo.prototype._generate = function(options){
       });
     });
   }).then(function(){
+    // Remove old routes
     var removed = _.difference(routeList, newRouteList);
 
     for (var i = 0, len = removed.length; i < len; i++){
       route.remove(removed[i]);
     }
 
     self.emit('generateAfter');
+
+    // Run after_generate filters
+    return self.execFilter('after_generate', null, {context: self});
   }).finally(function(){
     self._isGenerating = false;
   });
@@ -370,11 +383,19 @@ Hexo.prototype.exit = function(err){
     );
   }
 
-  return this.extend.filter.exec('before_exit', null, {context: this}).then(function(){
+  return this.execFilter('before_exit', null, {context: this}).then(function(){
     self.emit('exit', err);
   });
 };
 
+Hexo.prototype.execFilter = function(type, data, options){
+  return this.extend.filter.exec(type, data, options);
+};
+
+Hexo.prototype.execFilterSync = function(type, data, options){
+  return this.extend.filter.execSync(type, data, options);
+};
+
 Hexo.lib_dir = Hexo.prototype.lib_dir = libDir + sep;
 
 Hexo.core_dir = Hexo.prototype.core_dir = pathFn.dirname(libDir) + sep;

lib/hexo/post.js

@@ -7,6 +7,10 @@ var yaml = require('js-yaml');
 var util = require('hexo-util');
 var fs = require('hexo-fs');
 var yfm = require('hexo-front-matter');
+var vm = require('vm');
+var swigFilters = require('swig/lib/filters');
+var swigUtils = require('swig/lib/utils');
+var swigParser = require('swig/lib/parser');
 
 var slugize = util.slugize;
 var escapeRegExp = util.escapeRegExp;
@@ -51,7 +55,7 @@ Post.prototype.create = function(data, replace, callback){
 
   return Promise.all([
     // Get the post path
-    ctx.extend.filter.exec('new_post_path', data, {
+    ctx.execFilter('new_post_path', data, {
       args: [replace],
       context: ctx
     }),
@@ -199,11 +203,45 @@ Post.prototype.publish = function(data, replace, callback){
   }).thenReturn(result).nodeify(callback);
 };
 
+function efn(){
+  return '';
+}
+
+function swigRender(swig, data){
+  // Swig.render extends the options which will cause "Maximum call stack size
+  // exceeded" error. I try to build a own compiler instead.
+  // Based on: https://github.com/paularmstrong/swig/blob/v1.4.2/lib/swig.js#L485
+  var src = data.content;
+  var tokens = swig.parse(src);
+
+  var options = {
+    filename: data.source,
+    locals: data
+  };
+
+  var sandbox = {
+    _swig: swig,
+    _ctx: {},
+    _filters: swigFilters,
+    _utils: swigUtils,
+    _fn: efn,
+    _output: '',
+    _ext: swig.extensions
+  };
+
+  // EXPERIMENTAL: run swig in a new context
+  // I don't use `new Function()` here because it's a form of eval and will cause
+  // lint error. But I don't know whether vm is slower or not.
+  vm.runInNewContext(swigParser.compile(tokens, [], options), sandbox);
+
+  return sandbox._output.trim();
+}
+
 Post.prototype.render = function(source, data, callback){
   var ctx = this.context;
-  var filter = ctx.extend.filter;
   var config = ctx.config;
   var cache = [];
+  var swig = ctx.extend.tag.swig;
 
   data = data || {};
 
@@ -215,7 +253,7 @@ Post.prototype.render = function(source, data, callback){
     if (data.content != null) return resolve(data.content);
     if (!source) return reject(new Error('No input file or string!'));
 
-    // Read content from files
+  // Read content from files
     fs.readFile(source).then(resolve, reject);
   }).then(function(content){
     // Escape all swig tags
@@ -226,12 +264,17 @@ Post.prototype.render = function(source, data, callback){
       .replace(rSwigBlock, escapeContent);
 
     // Run "before_post_render" filters
-    return filter.exec('before_post_render', data, {context: ctx}).then(function(){
+    return ctx.execFilter('before_post_render', data, {context: ctx}).then(function(){
       data.content = data.content.replace(rEscapeContent, function(match, content){
         return placeholder + (cache.push(content) - 1);
       });
     });
   }).then(function(){
+    // Skip render phase if this is a swig file
+    if ((source && pathFn.extname(source) === '.swig') || data.engine === 'swig'){
+      return data.content;
+    }
+
     var options = data.markdown || {};
     if (!config.highlight.enable) options.highlight = null;
 
@@ -251,8 +294,11 @@ Post.prototype.render = function(source, data, callback){
     // Clean cache
     cache.length = 0;
 
+    // Render with Swig
+    data.content = swigRender(swig, data);
+
     // Run "after_post_render" filters
-    return filter.exec('after_post_render', data, {context: ctx});
+    return ctx.execFilter('after_post_render', data, {context: ctx});
   });
 };
 

lib/models/page.js

@@ -2,11 +2,9 @@ var Schema = require('warehouse').Schema;
 var pathFn = require('path');
 var Moment = require('./types/moment');
 var moment = require('moment');
-var common = require('./common');
+var CacheString = require('./types/cachestring');
 
 module.exports = function(ctx){
-  var swig = ctx.extend.tag.swig;
-
   var Page = new Schema({
     title: {type: String, default: ''},
     date: {
@@ -26,7 +24,10 @@ module.exports = function(ctx){
     _content: {type: String, default: ''},
     source: {type: String, required: true},
     path: {type: String, required: true},
-    raw: {type: String, default: ''}
+    raw: {type: String, default: ''},
+    content: {type: CacheString, default: ''},
+    excerpt: {type: CacheString, default: ''},
+    more: {type: CacheString, default: ''}
   });
 
   Page.virtual('permalink').get(function(){
@@ -37,17 +38,5 @@ module.exports = function(ctx){
     return pathFn.join(ctx.source_dir, this.source || '');
   });
 
-  Page.virtual('content').get(function(){
-    return common.renderContent(swig, this);
-  });
-
-  Page.virtual('excerpt').get(function(){
-    return common.getExcerpt(this.content);
-  });
-
-  Page.virtual('more').get(function(){
-    return common.getMore(this.content);
-  });
-
   return Page;
 };