git-webserver
Version:
Web Server Integrated GIT Version Control System
94 lines • 4.24 kB
JavaScript
/**
* Exports module to initialise from external app
* @param {String} appRoutePath Accepts caller current directory path __dirname
*/
module.exports = function (appRoutePath) {
config = {};
//external dependency
var uidGenerator = require('node-unique-id-generator');
var fileSystem = require('fs');
//Check Config Json exist
if (fileSystem.existsSync("config.json")) {
//Read config Json file
var fileString = fileSystem.readFileSync('config.json', 'utf8');
//try catch to hande broken config json file read
try {
//parse json data from file to config variable
config = JSON.parse(fileString);
} catch (e) {
console.log("Input Config file damaged.");
console.log("Check file \"config_broke.json\" for inspection");
console.log("Back up \"config.json\" file generated to launch the application");
//deleting existing brokent config json file if exist
if (fileSystem.existsSync("config_broke.json")) {
fileSystem.unlinkSync("config_broke.json");
}
//renaming broken config json file
fileSystem.rename("config.json", "config_broke.json", function (err) {
if (err) {
console.log(err);
}
});
//Passing defalut parameter to config variable
config = {
salt: uidGenerator.generateGUID(),
cluster: true,
logging: false,
};
//writing the default parameter to config json file for future read
fileSystem.writeFileSync("config.json", JSON.stringify(config));
}
} else {
//If config file not exist default parameter is loded in config variable
config = {
salt: uidGenerator.generateGUID(),
cluster: true,
logging: false,
};
//writing the default parameter to config json file for future read
fileSystem.writeFileSync("config.json", JSON.stringify(config));
}
//external dependency
var cluster = require('cluster');
var numCPUs = require('os').cpus().length;
//internal dependency
var gitWebServer = require("./Git-WebServer");
//updating config variable with additional data based on condition
//load max possible no. of cpu count to config.numCPUs if no data received from config json file
config.numCPUs = config.numCPUs || numCPUs;
//App root path (package.json) location
config.appRoutePath = appRoutePath;
//Repo directory created based on user input or default input
config.repoDir = config.repoDir || "repos";
//Git-WebServer root directory is loaded in config file
config.dirname = __dirname;
//Create repo.git --bare repo is user app route path
if (!fileSystem.existsSync(config.appRoutePath + "/" + config.repoDir)) {
fileSystem.mkdirSync(config.appRoutePath + "/" + config.repoDir);
}
//Create repo clone directory inside Git-WebServer Projuct folder
if (!fileSystem.existsSync(config.dirname + "/" + config.repoDir)) {
fileSystem.mkdirSync(config.dirname + "/" + config.repoDir);
}
//if the config cluster option is true the server is ran in cluster mode
//Initial cluster master will pass though this loop
//fork child process based on no. of available cpu or config cluster no.
if (cluster.isMaster && config.cluster) {
console.log("Server Running in Cluster");
for (var i = 0; i < config.numCPUs; i++) {
//fork worker child
cluster.fork();
}
//Event lister to listen for worker failure
cluster.on('exit', function (worker, code, signal) {
console.log("worker " + worker.process.pid + " died");
//fork child process to replace the died worker
cluster.fork();
});
}
//Cluster worker process will go thought the app code.
else {
//call the server funtion exported from Git-WebServer File
gitWebServer.server(config);
}
};