How to use the co-fs.exists function in co-fs
To help you get started, we’ve selected a few co-fs examples, based on popular ways it is used in public projects.
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setpixel / storyboard-fountain / node-webkit-src / js / localsource.js View on Github 
co(function *() {
var dataPath = getFullDataPath() + '/images';
return (
(yield cofs.exists(dataPath)) &&
(yield cofs.stat(dataPath)).isDirectory()
);
})(next);
};var makeDataPath = function *(basepath, name) {
var alt = '';
while (true) {
var path = basepath + '/' + name + alt + '_data';
if (yield cofs.exists(path)) {
alt = '_' + shortId.generate();
}
else {
yield cofs.mkdir(path);
yield cofs.mkdir(path + '/images');
return './' + name + alt + '_data';
}
}
};function *ensure(pathToBook) {
var pathToDirectory = path.dirname(pathToBook);
if (!(yield fs.exists(pathToDirectory))) {
yield fs.mkdir(pathToDirectory);
}
}
