Box is a container used for processing files in a specified folder. Hexo uses two different boxes: hexo.source and hexo.theme. The former is used to process the source folder and the latter to process the theme folder.

Load Files

Box provides two methods for loading files: process and watch. process loads all files in the folder. watch does the same, but also starts watching for file changes.

box.process().then(function () {
  // ...
});

box.watch().then(function () {
  // You can call box.unwatch() later to stop watching.
});

Path Matching

Box provides many ways for path matching. You can use a regular expression, a function or an Express-style pattern string. For example:

posts/:id => posts/89
posts/*path => posts/2015/title

See util.Pattern for more info.

Processors

A processor is an essential element of Box and is used to process files. You can use path matching as described above to restrict what exactly the processor should process. Register a new processor with the addProcessor method.

box.addProcessor("posts/:id", function (file) {
  //
});

Box passes the content of matched files to processors. This information can then be read straight from the file argument in the callback:

Box also provides some methods so you don’t have to do file IO by yourself.