pushover-giting/lib/info.js

git push deploy server over http

var httpDuplex = require('http-duplex');
var spawn = require('child_process').spawn;

var noCache = require('./no_cache');
var onexit = require('./onexit');

module.exports = function(opts, req, res) {
	var self = opts.repos;
	var dup = httpDuplex(req, res);
	dup.cwd = self.dirMap(opts.repo);
	dup.repo = opts.repo;
	dup.req = req;

	dup.accept = dup.emit.bind(dup, 'accept');
	dup.reject = dup.emit.bind(dup, 'reject');

	dup.once('reject', function(code) {
		res.statusCode = code || 500;
		res.end();
	});

	var anyListeners = self.listeners('info').length > 0;

	self.exists(opts.repo, function(ex) {
		dup.exists = ex;

		if (!ex && self.autoCreate) {
			dup.once('accept', function() {
				self.create(opts.repo, next);
			});

			self.emit('info', dup);
			if (!anyListeners)
				dup.accept();
		} else if (!ex) {
			res.statusCode = 404;
			res.setHeader('content-type', 'text/plain');
			res.end('repository not found');
		} else {
			dup.once('accept', next);
			self.emit('info', dup);

			if (!anyListeners)
				dup.accept();
		}
	});

	function next() {
		res.setHeader('content-type', 'application/x-git-' + opts.service + '-advertisement');
		noCache(res);
		var d = self.dirMap(opts.repo);
		serviceRespond(self, opts.service, d, res);
	}

}
function serviceRespond(self, service, file, res) {
	function pack(s) {
		var n = (4 + s.length).toString(16);
		return Array(4 - n.length + 1).join('0') + n + s;
	}


	res.write(pack('# service=git-' + service + '\n'));
	res.write('0000');

	var cmd = ['git', service, '--stateless-rpc', '--advertise-refs', file];
	var ps = spawn(cmd[0], cmd.slice(1));
	ps.on('error', function(err) {
		self.emit('error', new Error(err.message + ' running command ' + cmd.join(' ')));
	});
	ps.stdout.pipe(res);
}