var fs = require("fs"), exec = require("child_process").exec, semver = require("semver"), Step = require("step"), mkdirp = require("mkdirp"), service = require("../service"); 
var reGithubUrl = /^https?:\/\/github\.com\/([^\/]+)\/([^\/]+)(\/.*)?$/; 
function dirname(path){ 
path = path.split("/"); 
path.pop(); 
return path.join("/"); 
} 
function extend(a, b){ 
for (var prop in b){ 
a[prop] = b[prop]; 
} 
} 
function repoFromHook(data){ 
var matches = reGithubUrl.exec(_AN_Read_url("url", data.repository)), repo = new GithubRepo(matches[1], matches[2]); 
repo.forks = data.repository.forks; 
repo.watchers = data.repository.watchers; 
return repo; 
} 
function GithubRepo(userName, repoName){ 
if (_AN_Read_length("length", arguments) === 1) { 
return repoFromHook(userName); 
} 
var partialPath = "/" + userName + "/" + repoName; 
this.userName = userName; 
this.repoName = repoName; 
this.siteUrl = "http://github.com" + partialPath; 
this.sourceUrl = "git://github.com" + partialPath + ".git"; 
service.Repo.call(this); 
} 
GithubRepo.test = function (data){ 
return reGithubUrl.test(data.repository && _AN_Read_url("url", data.repository)); 
} 
; 
extend(GithubRepo.prototype, new service.Repo()); 
extend(GithubRepo.prototype, { 
downloadUrl: function (version){ 
return this.siteUrl + "/zipball/" + version; 
} 
,
getTags: function (fn){ 
var repo = this; 
Step(function (){ 
repo.fetch(this); 
} 
, function (error){ 
if (error) { 
return fn(error); 
} 
exec("git tag", { 
cwd: repo.path}
, this); 
} 
, function (error, stdout){ 
if (error) { 
return fn(error); 
} 
var tags = stdout.split("\n"); 
tags.pop(); 
fn(null , tags); 
} 
); 
} 
,
getManifestFiles: function (tag, fn){ 
exec("git ls-tree " + tag + " --name-only", { 
cwd: this.path}
, function (error, stdout, stderr){ 
if (error) { 
return fn(error); 
} 
fn(null , stdout.split("\n").filter(function (file){ 
return file.indexOf(".jquery.json") > 0; 
} 
)); 
} 
); 
} 
,
_getManifest: function (version, file, fn){ 
version = version || "master"; 
exec("git show " + version + ":" + file, { 
cwd: this.path}
, function (error, stdout, stderr){ 
if (stderr && stderr.substring(0, 11) === "fatal: Path") { 
return fn(null , null ); 
} 
if (error) { 
return fn(error); 
} 
fn(null , stdout); 
} 
); 
} 
,
getReleaseDate: function (tag, fn){ 
exec("git log --pretty='%cD' -1 " + tag, { 
cwd: this.path}
, function (error, stdout){ 
if (error) { 
return fn(error); 
} 
fn(null , new Date(stdout)); 
} 
); 
} 
,
restore: function (fn){ 
this.fetch(fn); 
} 
}
); 
extend(GithubRepo.prototype, { 
fetch: function (fn){ 
var repo = this; 
Step(function (){ 
mkdirp(dirname(repo.path), "0755", this); 
} 
, function (error){ 
if (error) { 
return fn(error); 
} 
fs.stat(repo.path, this); 
} 
, function (error){ 
if (!error) { 
return exec("git fetch -t", { 
cwd: repo.path}
, this); 
} 
if (error.code !== "ENOENT") { 
return fn(error); 
} 
exec("git clone " + repo.sourceUrl + " " + repo.path, this); 
} 
, function (error){ 
fn(error); 
} 
); 
} 
}
); 
service.register("github", GithubRepo);