How to set up nightwatch.json to be cross platform - nightwatch.js

Question

Currently in my nightwatch.json I am set up fine for running on my mac:
{
"src_folders" : ["specs"],
"output_folder" : "tests/e2e/reports",
"custom_commands_path" : "",
"custom_assertions_path" : "",
"page_objects_path" : "",
"globals_path" : "",
"selenium" : {
"start_process" : true,
"server_path" : "bin/selenium-server-standalone-2.48.2.jar",
"log_path" : "",
"host" : "127.0.0.1",
"port" : 4444,
"cli_args" : {
"webdriver.chrome.driver" : "bin/chromedriver 2",
"webdriver.ie.driver" : ""
}
},
"test_settings" : {
"default" : {
"launch_url" : "someurl",
"selenium_port" : 4444,
"selenium_host" : "localhost",
"silent": true,
"screenshots" : {
"enabled" : false,
"path" : ""
},
"desiredCapabilities": {
"browserName": "chrome",
"javascriptEnabled": true,
"acceptSslCerts": true
}
}
}
}
However the driver for chrome will need to run chromedriver.exe. What is the best practice way of resolving this? Do I need 2 config files? I would prefer not to have this as I will need to have extra checks for this.

Answer 1

Solution is to use a nightwatch.conf.js file, ie:
module.exports = (function (settings) {
//Setting chromedriver path at runtime to run on different architectures
if (process.platform === "darwin") {
settings.selenium.cli_args["webdriver.chrome.driver"] = "bin/chromedriver 2";
}
else if (process.platform === "win32" || process.platform === "win64") {
settings.selenium.cli_args["webdriver.chrome.driver"] = "bin/chromedriver.exe";
}
return settings;
})(require('./nightwatch.json'));