find-parent-dir 

Finds the first parent directory that contains a given file or directory.

npm install find-parent-dir

``js
// assuming this is called from a file in a subdirectory of /myprojects/foo which contains .git directory
var findParentDir = require('find-parent-dir');

findParentDir(__dirname, '.git', function (err, dir) {
// has err if some file access error occurred
console.log(dir); // => /myprojects/foo/

// if parent dir wasn't found, dir is null
})

// Same using sync method
var dir;
try {
dir = findParentDir.sync(__dirname, '.git');
console.log(dir); // => /myprojects/foo/
// if parent dir wasn't found, dir is null
} catch(err) {
console.error('error', err);
}
``