Convert physical file structure to mock-fs compatible virtual structure.

mock-fs-converter.js

var glob = require("glob");
var fs = require("fs");
var path = require("path");

var dir = "C:/Users/gs025879/Documents/webstrom/eslint/tests/fixtures/config-hierarchy";

var structure = glob.sync("**/*.*", {
    cwd: dir,
    dot:true
});

var finalStructure = {};

structure.reduce(function(prevValue, currentVal){
    var pieces = currentVal.split("/");
    var firstDir = pieces.shift();

    if(!prevValue[firstDir]) {
        prevValue[firstDir] = {};
    }
    pieces.reduce(function(coll, val, currentIndex){
        if (currentIndex < pieces.length - 1) {
            if (!coll[val]) {
                coll[val] = {};
            }
            return coll[val];
        }
        else {
            coll[val] = fs.readFileSync(path.resolve(dir, currentVal), {encoding: "utf8"});
        }
        return coll;
    }, prevValue[firstDir]);

    return prevValue;
}, finalStructure);

console.info(finalStructure);
fs.writeFileSync("mock.json", JSON.stringify(finalStructure));