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#!/bin/sh
':' //; exec "$(command -v nodejs || command -v node)" "$0" "$@"
// Core node modules
var path = require('path');
var os = require('os');
var zlib = require('zlib');
var child_process = require('child_process');
// 3rd party modules
var fs = require('fs-extra');
var getopt = require('node-getopt');
var tar = require('tar');
function make_error_cb(message)
{
return function(e) {
console.error("Error %s: %s", message, e);
process.exit(1);
};
}
function remove_files(options)
{
if (options.verbose)
console.log("Removing temporary files");
fs.remove(options.project_folder);
}
function run_project(options)
{
if (options.verbose)
console.log("Running the project");
var current_dir = process.cwd();
process.chdir(options.project_root);
var proc = child_process.fork(options.metadata.Entry);
proc.on('exit', function(code){
if (options.verbose)
console.log('Child exited with code %s', code);
process.chdir(current_dir);
if (!options.keep)
remove_files(options);
});
}
function unpack_project_data(options)
{
if (options.verbose)
console.log("Unpacking project sources and assets");
var datafile = path.join(options.project_folder, "data.tar.gz");
var project_root = path.join(options.project_folder, "root");
options.project_root = project_root;
var input = fs.createReadStream(datafile);
var unzipper = zlib.createGunzip();
var extractor = tar.Extract({path: project_root, strip: 0});
input.on('error', make_error_cb("reading package data file."));
extractor.on('error', make_error_cb("unpacking package data file."));
if (!("only-extract" in options))
extractor.on('end', function(){ run_project(options); });
input.pipe(unzipper)
unzipper.pipe(extractor);
}
function read_metadata(options)
{
if (options.verbose)
console.log("Reading project metadata");
var project_folder = options.project_folder;
var metadata = JSON.parse(fs.readFileSync(path.join(project_folder, "meta.json")));
if (options.verbose)
console.log("Project: %s\nVersion: %s\nEntry point: %s", metadata.Name, metadata.Version, metadata.Entry);
if ("only-dump" in options)
process.exit(0);
options.metadata = metadata;
unpack_project_data(options);
}
function extract(filename, options)
{
if (options.verbose)
console.log("Extracting ", filename, "with options ", options);
var project_id = path.basename(filename, ".epk");
var project_folder = path.join(options['temp-dir'], project_id);
options.project_folder = project_folder;
options.project_id = project_id;
var input = fs.createReadStream(filename);
var extractor = tar.Extract({path: options['temp-dir'], strip: 0});
input.on('error', make_error_cb("reading package file."));
extractor.on('error', make_error_cb("unpacking package file."));
extractor.on('end', function(){ read_metadata(options); });
input.pipe(extractor);
}
function main() {
var options = getopt.create([
['d', 'only-dump', 'Only dump information about the package'],
['e', 'only-extract', 'Only extract the package, do not run'],
['h', 'help', 'Display this help'],
['k', 'keep', 'Do not remove the files after exiting'],
['t', 'temp-dir=ARG', 'Temporary dir to extract files'],
['v', 'verbose', 'Print information messages'],
]).bindHelp().parseSystem();
var filename = options.argv[0];
if (filename === undefined)
{
console.error("Must provide a package file.");
process.exit(1);
}
if (!('temp-dir' in options.options))
{
options.options["temp-dir"] = path.join(os.tmpdir(), "efljs_apps");
if (options.verbose)
console.log("Defaulting temp dir to ", options.options["temp-dir"]);
}
extract(filename, options.options);
}
main();
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