harness-drone/plugin/remote/github/github.go

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package github
import (
"fmt"
"net/http"
"net/url"
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"strconv"
"strings"
"time"
"code.google.com/p/goauth2/oauth"
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"github.com/drone/drone/shared/httputil"
"github.com/drone/drone/shared/model"
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"github.com/drone/go-github/github"
)
const (
DefaultAPI = "https://api.github.com/"
DefaultURL = "https://github.com"
DefaultScope = "repo,repo:status,user:email"
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)
type GitHub struct {
URL string
API string
Client string
Secret string
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}
func New(url, api, client, secret string) *GitHub {
var github = GitHub{
URL: url,
API: api,
Client: client,
Secret: secret,
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}
// the API must have a trailing slash
if !strings.HasSuffix(github.API, "/") {
github.API += "/"
}
// the URL must NOT have a trailing slash
if strings.HasSuffix(github.URL, "/") {
github.URL = github.URL[:len(github.URL)-1]
}
return &github
}
func NewDefault(client, secret string) *GitHub {
return New(DefaultURL, DefaultAPI, client, secret)
}
// Authorize handles GitHub API Authorization.
func (r *GitHub) Authorize(res http.ResponseWriter, req *http.Request) (*model.Login, error) {
var config = &oauth.Config{
ClientId: r.Client,
ClientSecret: r.Secret,
Scope: DefaultScope,
AuthURL: fmt.Sprintf("%s/login/oauth/authorize", r.URL),
TokenURL: fmt.Sprintf("%s/login/oauth/access_token", r.URL),
RedirectURL: fmt.Sprintf("%s/login/%s", httputil.GetURL(req), r.GetKind()),
}
// get the OAuth code
var code = req.FormValue("code")
var state = req.FormValue("state")
if len(code) == 0 {
var random = GetRandom()
httputil.SetCookie(res, req, "github_state", random)
http.Redirect(res, req, config.AuthCodeURL(random), http.StatusSeeOther)
return nil, nil
}
cookieState := httputil.GetCookie(req, "github_state")
httputil.DelCookie(res, req, "github_state")
if cookieState != state {
return nil, fmt.Errorf("Error matching state in OAuth2 redirect")
}
var trans = &oauth.Transport{Config: config}
var token, err = trans.Exchange(code)
if err != nil {
return nil, err
}
var client = NewClient(r.API, token.AccessToken)
var useremail, errr = GetUserEmail(client)
if errr != nil {
return nil, errr
}
var login = new(model.Login)
login.ID = int64(*useremail.ID)
login.Access = token.AccessToken
login.Login = *useremail.Login
login.Name = *useremail.Name
login.Email = *useremail.Email
return login, nil
}
// GetKind returns the internal identifier of this remote GitHub instane.
func (r *GitHub) GetKind() string {
if r.IsEnterprise() {
return model.RemoteGithubEnterprise
} else {
return model.RemoteGithub
}
}
// GetHost returns the hostname of this remote GitHub instance.
func (r *GitHub) GetHost() string {
uri, _ := url.Parse(r.URL)
return uri.Host
}
// IsEnterprise returns true if the remote system is an
// instance of GitHub Enterprise Edition.
func (r *GitHub) IsEnterprise() bool {
return r.URL != DefaultURL
}
// GetRepos fetches all repositories that the specified
// user has access to in the remote system.
func (r *GitHub) GetRepos(user *model.User) ([]*model.Repo, error) {
var repos []*model.Repo
var client = NewClient(r.API, user.Access)
var list, err = GetAllRepos(client)
if err != nil {
return nil, err
}
var remote = r.GetKind()
var hostname = r.GetHost()
var enterprise = r.IsEnterprise()
for _, item := range list {
var repo = model.Repo{
UserID: user.ID,
Remote: remote,
Host: hostname,
Owner: *item.Owner.Login,
Name: *item.Name,
Private: *item.Private,
URL: *item.HTMLURL,
CloneURL: *item.GitURL,
GitURL: *item.GitURL,
SSHURL: *item.SSHURL,
Role: &model.Perm{},
}
if enterprise || repo.Private {
repo.CloneURL = *item.SSHURL
}
// if no permissions we should skip the repository
// entirely, since this should never happen
if item.Permissions == nil {
continue
}
repo.Role.Admin = (*item.Permissions)["admin"]
repo.Role.Write = (*item.Permissions)["push"]
repo.Role.Read = (*item.Permissions)["pull"]
repos = append(repos, &repo)
}
return repos, err
}
// GetScript fetches the build script (.drone.yml) from the remote
// repository and returns in string format.
func (r *GitHub) GetScript(user *model.User, repo *model.Repo, hook *model.Hook) ([]byte, error) {
var client = NewClient(r.API, user.Access)
return GetFile(client, repo.Owner, repo.Name, ".drone.yml", hook.Sha)
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}
// Activate activates a repository by adding a Post-commit hook and
// a Public Deploy key, if applicable.
func (r *GitHub) Activate(user *model.User, repo *model.Repo, link string) error {
var client = NewClient(r.API, user.Access)
var title, err = GetKeyTitle(link)
if err != nil {
return err
}
// if the CloneURL is using the SSHURL then we know that
// we need to add an SSH key to GitHub.
if repo.SSHURL == repo.CloneURL {
_, err = CreateUpdateKey(client, repo.Owner, repo.Name, title, repo.PublicKey)
if err != nil {
return err
}
}
_, err = CreateUpdateHook(client, repo.Owner, repo.Name, link)
return err
}
// ParseHook parses the post-commit hook from the Request body
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// and returns the required data in a standard format.
func (r *GitHub) ParseHook(req *http.Request) (*model.Hook, error) {
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// handle github ping
if req.Header.Get("X-Github-Event") == "ping" {
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return nil, nil
}
// handle github pull request hook differently
if req.Header.Get("X-Github-Event") == "pull_request" {
return r.ParsePullRequestHook(req)
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}
// get the payload of the message
var payload = req.FormValue("payload")
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// parse the github Hook payload
var data, err = github.ParseHook([]byte(payload))
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if err != nil {
return nil, nil
}
// make sure this is being triggered because of a commit
// and not something like a tag deletion or whatever
if data.IsTag() ||
data.IsGithubPages() ||
data.IsHead() == false ||
data.IsDeleted() {
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return nil, nil
}
var hook = new(model.Hook)
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hook.Repo = data.Repo.Name
hook.Owner = data.Repo.Owner.Login
hook.Sha = data.Head.Id
hook.Branch = data.Branch()
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if len(hook.Owner) == 0 {
hook.Owner = data.Repo.Owner.Name
}
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// extract the author and message from the commit
// this is kind of experimental, since I don't know
// what I'm doing here.
if data.Head != nil && data.Head.Author != nil {
hook.Message = data.Head.Message
hook.Timestamp = data.Head.Timestamp
hook.Author = data.Head.Author.Email
} else if data.Commits != nil && len(data.Commits) > 0 && data.Commits[0].Author != nil {
hook.Message = data.Commits[0].Message
hook.Timestamp = data.Commits[0].Timestamp
hook.Author = data.Commits[0].Author.Email
}
return hook, nil
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}
// ParsePullRequestHook parses the pull request hook from the Request body
// and returns the required data in a standard format.
func (r *GitHub) ParsePullRequestHook(req *http.Request) (*model.Hook, error) {
var payload = req.FormValue("payload")
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// parse the payload to retrieve the pull-request
// hook meta-data.
var data, err = github.ParsePullRequestHook([]byte(payload))
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if err != nil {
return nil, err
}
// ignore these
if data.Action != "opened" && data.Action != "synchronize" {
return nil, nil
}
// TODO we should also store the pull request branch (ie from x to y)
// we can find it here: data.PullRequest.Head.Ref
var hook = model.Hook{
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Owner: data.Repo.Owner.Login,
Repo: data.Repo.Name,
Sha: data.PullRequest.Head.Sha,
Branch: data.PullRequest.Base.Ref,
Author: data.PullRequest.User.Login,
Gravatar: data.PullRequest.User.GravatarId,
Timestamp: time.Now().UTC().String(),
Message: data.PullRequest.Title,
PullRequest: strconv.Itoa(data.Number),
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}
if len(hook.Owner) == 0 {
hook.Owner = data.Repo.Owner.Name
}
return &hook, nil
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}