491 lines
13 KiB
Go
491 lines
13 KiB
Go
// Copyright 2019 Sorint.lab
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package github
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import (
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"context"
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"crypto/tls"
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"net/url"
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"path"
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"regexp"
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"strconv"
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"strings"
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"time"
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gitsource "github.com/sorintlab/agola/internal/gitsources"
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"github.com/google/go-github/v25/github"
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"golang.org/x/oauth2"
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errors "golang.org/x/xerrors"
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)
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var (
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GitHubOauth2Scopes = []string{"repo"}
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branchRefPrefix = "refs/heads/"
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tagRefPrefix = "refs/tags/"
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pullRequestRefRegex = regexp.MustCompile("refs/pull/(.*)/head")
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pullRequestRefFmt = "refs/pull/%s/head"
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)
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const (
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GitHubAPIURL = "https://api.github.com"
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GitHubWebURL = "https://github.com"
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GitHubSSHHostKey = "github.com ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ=="
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)
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type Opts struct {
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APIURL string
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WebURL string
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Token string
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SkipVerify bool
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Oauth2ClientID string
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Oauth2Secret string
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}
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type Client struct {
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client *github.Client
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httpClient *http.Client
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APIURL string
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WebURL string
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oauth2ClientID string
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oauth2Secret string
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}
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// fromCommitStatus converts a gitsource commit status to a github commit status
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func fromCommitStatus(status gitsource.CommitStatus) string {
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switch status {
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case gitsource.CommitStatusPending:
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return "pending"
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case gitsource.CommitStatusSuccess:
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return "success"
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case gitsource.CommitStatusError:
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return "error"
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case gitsource.CommitStatusFailed:
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return "failure"
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default:
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panic(fmt.Errorf("unknown commit status %q", status))
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}
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}
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func parseRepoPath(repopath string) (string, string, error) {
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parts := strings.Split(repopath, "/")
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if len(parts) != 2 {
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return "", "", errors.Errorf("wrong github repo path: %q", repopath)
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}
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return parts[0], parts[1], nil
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}
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type TokenTransport struct {
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token string
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rt http.RoundTripper
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}
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func (t *TokenTransport) RoundTrip(r *http.Request) (*http.Response, error) {
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if t.token != "" {
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r.Header.Set("Authorization", "Bearer "+t.token)
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}
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return t.rt.RoundTrip(r)
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}
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func New(opts Opts) (*Client, error) {
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// copied from net/http until it has a clone function: https://github.com/golang/go/issues/26013
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transport := &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: (&net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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DualStack: true,
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}).DialContext,
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MaxIdleConns: 100,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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TLSClientConfig: &tls.Config{InsecureSkipVerify: opts.SkipVerify},
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}
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httpClient := &http.Client{Transport: &TokenTransport{token: opts.Token, rt: transport}}
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if opts.APIURL == GitHubAPIURL {
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opts.WebURL = GitHubWebURL
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} else {
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if opts.WebURL == "" {
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opts.WebURL = opts.APIURL
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}
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}
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client := github.NewClient(httpClient)
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client.BaseURL, _ = url.Parse(GitHubAPIURL + "/")
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return &Client{
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client: client,
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httpClient: httpClient,
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APIURL: opts.APIURL,
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WebURL: opts.WebURL,
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oauth2ClientID: opts.Oauth2ClientID,
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oauth2Secret: opts.Oauth2Secret,
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}, nil
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}
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func (c *Client) oauth2Config(callbackURL string) *oauth2.Config {
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return &oauth2.Config{
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ClientID: c.oauth2ClientID,
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ClientSecret: c.oauth2Secret,
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Scopes: GitHubOauth2Scopes,
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Endpoint: oauth2.Endpoint{
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AuthURL: fmt.Sprintf("%s/login/oauth/authorize", c.WebURL),
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TokenURL: fmt.Sprintf("%s/login/oauth/access_token", c.WebURL),
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},
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RedirectURL: callbackURL,
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}
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}
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func (c *Client) GetOauth2AuthorizationURL(callbackURL, state string) (string, error) {
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var config = c.oauth2Config(callbackURL)
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return config.AuthCodeURL(state), nil
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}
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func (c *Client) RequestOauth2Token(callbackURL, code string) (*oauth2.Token, error) {
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var config = c.oauth2Config(callbackURL)
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token, err := config.Exchange(context.TODO(), code)
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if err != nil {
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return nil, errors.Errorf("cannot get oauth2 token: %w", err)
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}
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return token, nil
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}
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func (c *Client) RefreshOauth2Token(refreshToken string) (*oauth2.Token, error) {
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var config = c.oauth2Config("")
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token := &oauth2.Token{RefreshToken: refreshToken}
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ts := config.TokenSource(context.TODO(), token)
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return ts.Token()
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}
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func (c *Client) GetUserInfo() (*gitsource.UserInfo, error) {
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user, _, err := c.client.Users.Get(context.TODO(), "")
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if err != nil {
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return nil, err
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}
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return &gitsource.UserInfo{
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ID: strconv.FormatInt(*user.ID, 10),
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LoginName: *user.Login,
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Email: *user.Email,
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}, nil
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}
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func (c *Client) GetRepoInfo(repopath string) (*gitsource.RepoInfo, error) {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return nil, err
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}
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rr, _, err := c.client.Repositories.Get(context.TODO(), owner, reponame)
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if err != nil {
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return nil, err
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}
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return fromGithubRepo(rr), nil
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}
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func (c *Client) GetFile(repopath, commit, file string) ([]byte, error) {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return nil, err
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}
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r, err := c.client.Repositories.DownloadContents(context.TODO(), owner, reponame, file, &github.RepositoryContentGetOptions{Ref: commit})
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if err != nil {
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return nil, err
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}
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defer r.Close()
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return ioutil.ReadAll(r)
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}
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func (c *Client) CreateDeployKey(repopath, title, pubKey string, readonly bool) error {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return err
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}
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if _, _, err = c.client.Repositories.CreateKey(context.TODO(), owner, reponame, &github.Key{
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Title: github.String(title),
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Key: github.String(pubKey),
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ReadOnly: github.Bool(readonly),
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}); err != nil {
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return errors.Errorf("error creating deploy key: %w", err)
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}
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return nil
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}
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func (c *Client) UpdateDeployKey(repopath, title, pubKey string, readonly bool) error {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return err
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}
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// NOTE(sgotti) gitea has a bug where if we delete and remove the same key with
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// the same value it is correctly readded and the admin must force a
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// authorized_keys regeneration on the server. To avoid this we update it only
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// when the public key value has changed
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keys, _, err := c.client.Repositories.ListKeys(context.TODO(), owner, reponame, nil)
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if err != nil {
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return errors.Errorf("error retrieving existing deploy keys: %w", err)
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}
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for _, key := range keys {
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if *key.Title == title {
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if *key.Key == pubKey {
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return nil
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}
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if _, err := c.client.Repositories.DeleteKey(context.TODO(), owner, reponame, *key.ID); err != nil {
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return errors.Errorf("error removing existing deploy key: %w", err)
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}
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}
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}
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if _, _, err = c.client.Repositories.CreateKey(context.TODO(), owner, reponame, &github.Key{
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Title: github.String(title),
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Key: github.String(pubKey),
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ReadOnly: github.Bool(readonly),
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}); err != nil {
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return errors.Errorf("error creating deploy key: %w", err)
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}
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return nil
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}
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func (c *Client) DeleteDeployKey(repopath, title string) error {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return err
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}
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keys, _, err := c.client.Repositories.ListKeys(context.TODO(), owner, reponame, nil)
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if err != nil {
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return errors.Errorf("error retrieving existing deploy keys: %w", err)
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}
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for _, key := range keys {
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if *key.Title == title {
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if _, err := c.client.Repositories.DeleteKey(context.TODO(), owner, reponame, *key.ID); err != nil {
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return errors.Errorf("error removing existing deploy key: %w", err)
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}
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}
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}
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return nil
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}
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func (c *Client) CreateRepoWebhook(repopath, url, secret string) error {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return err
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}
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hook := &github.Hook{
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Config: map[string]interface{}{
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"url": url,
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"content_type": "json",
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"secret": secret,
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},
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Events: []string{"push", "pull_request"},
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Active: github.Bool(true),
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}
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if _, _, err = c.client.Repositories.CreateHook(context.TODO(), owner, reponame, hook); err != nil {
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return errors.Errorf("error creating repository webhook: %w", err)
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}
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return nil
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}
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func (c *Client) DeleteRepoWebhook(repopath, u string) error {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return err
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}
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hooks := []*github.Hook{}
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opt := &github.ListOptions{}
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for {
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pHooks, resp, err := c.client.Repositories.ListHooks(context.TODO(), owner, reponame, opt)
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if err != nil {
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return errors.Errorf("error retrieving repository webhooks: %w", err)
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}
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hooks = append(hooks, pHooks...)
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if resp.NextPage == 0 {
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break
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}
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opt.Page = resp.NextPage
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}
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// match the full url so we can have multiple webhooks for different agola
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// projects
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for _, hook := range hooks {
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if hook.Config["url"] == u {
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if _, err := c.client.Repositories.DeleteHook(context.TODO(), owner, reponame, *hook.ID); err != nil {
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return errors.Errorf("error deleting existing repository webhook: %w", err)
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}
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}
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}
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return nil
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}
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func (c *Client) CreateCommitStatus(repopath, commitSHA string, status gitsource.CommitStatus, targetURL, description, statusContext string) error {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return err
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}
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_, _, err = c.client.Repositories.CreateStatus(context.TODO(), owner, reponame, commitSHA, &github.RepoStatus{
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State: github.String(fromCommitStatus(status)),
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TargetURL: github.String(targetURL),
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Description: github.String(description),
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Context: github.String(statusContext),
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})
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return err
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}
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func (c *Client) ListUserRepos() ([]*gitsource.RepoInfo, error) {
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remoteRepos := []*github.Repository{}
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opt := &github.RepositoryListOptions{}
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for {
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pRemoteRepos, resp, err := c.client.Repositories.List(context.TODO(), "", opt)
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if err != nil {
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return nil, err
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}
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remoteRepos = append(remoteRepos, pRemoteRepos...)
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if resp.NextPage == 0 {
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break
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}
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opt.Page = resp.NextPage
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}
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repos := []*gitsource.RepoInfo{}
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for _, rr := range remoteRepos {
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// keep only repos with admin permissions
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if rr.Permissions != nil {
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if !(*rr.Permissions)["admin"] {
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continue
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}
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repos = append(repos, fromGithubRepo(rr))
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}
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}
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return repos, nil
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}
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func fromGithubRepo(rr *github.Repository) *gitsource.RepoInfo {
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return &gitsource.RepoInfo{
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ID: strconv.FormatInt(*rr.ID, 10),
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Path: path.Join(*rr.Owner.Login, *rr.Name),
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HTMLURL: *rr.HTMLURL,
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SSHCloneURL: *rr.SSHURL,
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HTTPCloneURL: *rr.CloneURL,
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}
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}
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func (c *Client) GetRef(repopath, ref string) (*gitsource.Ref, error) {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return nil, err
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}
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remoteRef, _, err := c.client.Git.GetRef(context.TODO(), owner, reponame, ref)
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if err != nil {
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return nil, err
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}
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return fromGithubRef(remoteRef)
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}
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func fromGithubRef(remoteRef *github.Reference) (*gitsource.Ref, error) {
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t := *(remoteRef.Object.Type)
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switch t {
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case "commit":
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default:
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return nil, fmt.Errorf("unsupported object type: %s", t)
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}
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return &gitsource.Ref{
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Ref: *remoteRef.Ref,
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CommitSHA: *remoteRef.Object.SHA,
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}, nil
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}
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func (c *Client) RefType(ref string) (gitsource.RefType, string, error) {
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switch {
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case strings.HasPrefix(ref, branchRefPrefix):
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return gitsource.RefTypeBranch, strings.TrimPrefix(ref, branchRefPrefix), nil
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case strings.HasPrefix(ref, tagRefPrefix):
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return gitsource.RefTypeTag, strings.TrimPrefix(ref, tagRefPrefix), nil
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case pullRequestRefRegex.MatchString(ref):
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m := pullRequestRefRegex.FindStringSubmatch(ref)
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return gitsource.RefTypePullRequest, m[0], nil
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default:
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return -1, "", fmt.Errorf("unsupported ref: %s", ref)
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}
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}
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func (c *Client) GetCommit(repopath, commitSHA string) (*gitsource.Commit, error) {
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owner, reponame, err := parseRepoPath(repopath)
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if err != nil {
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return nil, err
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}
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commit, _, err := c.client.Git.GetCommit(context.TODO(), owner, reponame, commitSHA)
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if err != nil {
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return nil, err
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}
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return &gitsource.Commit{
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SHA: *commit.SHA,
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Message: *commit.Message,
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}, nil
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}
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func (c *Client) BranchRef(branch string) string {
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return branchRefPrefix + branch
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}
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func (c *Client) TagRef(tag string) string {
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return tagRefPrefix + tag
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}
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func (c *Client) PullRequestRef(prID string) string {
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return fmt.Sprintf(pullRequestRefFmt, prID)
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}
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func (c *Client) CommitLink(repoInfo *gitsource.RepoInfo, commitSHA string) string {
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return fmt.Sprintf("%s/commit/%s", repoInfo.HTMLURL, commitSHA)
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}
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func (c *Client) BranchLink(repoInfo *gitsource.RepoInfo, branch string) string {
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return fmt.Sprintf("%s/src/branch/%s", repoInfo.HTMLURL, branch)
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}
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func (c *Client) TagLink(repoInfo *gitsource.RepoInfo, tag string) string {
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return fmt.Sprintf("%s/src/tag/%s", repoInfo.HTMLURL, tag)
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}
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func (c *Client) PullRequestLink(repoInfo *gitsource.RepoInfo, prID string) string {
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return fmt.Sprintf("%s/pull/%s", repoInfo.HTMLURL, prID)
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}
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