fstream-ignore
A fstream DirReader that filters out files that match globs in .ignore files throughout the tree, like how git ignores files based on a .gitignore file.
Here's an example:
var Ignore = require("fstream-ignore")
Ignore({ path: __dirname
       , ignoreFiles: [".ignore", ".gitignore"]
       })
  .on("child", function (c) {
    console.error(c.path.substr(c.root.path.length + 1))
  })
  .pipe(tar.Pack())
  .pipe(fs.createWriteStream("foo.tar")) 
This will tar up the files in __dirname into foo.tar, ignoring anything matched by the globs in any .iginore or .gitignore file.
 JarCasting
 JarCasting