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package github
import (
"context"
"fmt"
"net/http"
"net/url"
"os"
"strings"
"sync"
"time"
"github.com/actions/actions-runner-controller/build"
"github.com/actions/actions-runner-controller/github/metrics"
"github.com/actions/actions-runner-controller/logging"
"github.com/bradleyfalzon/ghinstallation/v2"
"github.com/go-logr/logr"
"github.com/google/go-github/v52/github"
"github.com/gregjones/httpcache"
"golang.org/x/oauth2"
)
// Config contains configuration for Github client
type Config struct {
EnterpriseURL string `split_words:"true"`
AppID int64 `split_words:"true"`
AppInstallationID int64 `split_words:"true"`
AppPrivateKey string `split_words:"true"`
Token string
URL string `split_words:"true"`
UploadURL string `split_words:"true"`
BasicauthUsername string `split_words:"true"`
BasicauthPassword string `split_words:"true"`
RunnerGitHubURL string `split_words:"true"`
Log *logr.Logger
}
// Client wraps GitHub client with some additional
type Client struct {
*github.Client
regTokens map[string]*github.RegistrationToken
mu sync.Mutex
// GithubBaseURL to Github without API suffix.
GithubBaseURL string
IsEnterprise bool
}
type BasicAuthTransport struct {
Username string
Password string
}
func (p BasicAuthTransport) RoundTrip(req *http.Request) (*http.Response, error) {
req.SetBasicAuth(p.Username, p.Password)
return http.DefaultTransport.RoundTrip(req)
}
// NewClient creates a Github Client
func (c *Config) NewClient() (*Client, error) {
var transport http.RoundTripper
if len(c.BasicauthUsername) > 0 && len(c.BasicauthPassword) > 0 {
transport = BasicAuthTransport{Username: c.BasicauthUsername, Password: c.BasicauthPassword}
} else if len(c.Token) > 0 {
transport = oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(&oauth2.Token{AccessToken: c.Token})).Transport
} else {
var tr *ghinstallation.Transport
if _, err := os.Stat(c.AppPrivateKey); err == nil {
tr, err = ghinstallation.NewKeyFromFile(http.DefaultTransport, c.AppID, c.AppInstallationID, c.AppPrivateKey)
if err != nil {
return nil, fmt.Errorf("authentication failed: using private key at %s: %v", c.AppPrivateKey, err)
}
} else {
tr, err = ghinstallation.New(http.DefaultTransport, c.AppID, c.AppInstallationID, []byte(c.AppPrivateKey))
if err != nil {
return nil, fmt.Errorf("authentication failed: using private key of size %d (%s...): %v", len(c.AppPrivateKey), strings.Split(c.AppPrivateKey, "\n")[0], err)
}
}
if len(c.EnterpriseURL) > 0 {
githubAPIURL, err := getEnterpriseApiUrl(c.EnterpriseURL)
if err != nil {
return nil, fmt.Errorf("enterprise url incorrect: %v", err)
}
tr.BaseURL = githubAPIURL
} else if c.URL != "" && tr.BaseURL != c.URL {
tr.BaseURL = c.URL
}
transport = tr
}
cached := httpcache.NewTransport(httpcache.NewMemoryCache())
cached.Transport = transport
loggingTransport := logging.Transport{Transport: cached, Log: c.Log}
metricsTransport := metrics.Transport{Transport: loggingTransport}
httpClient := &http.Client{Transport: metricsTransport}
metrics.Register()
var client *github.Client
var githubBaseURL string
var isEnterprise bool
if len(c.EnterpriseURL) > 0 {
var err error
isEnterprise = true
client, err = github.NewEnterpriseClient(c.EnterpriseURL, c.EnterpriseURL, httpClient)
if err != nil {
return nil, fmt.Errorf("enterprise client creation failed: %v", err)
}
githubBaseURL = fmt.Sprintf("%s://%s%s", client.BaseURL.Scheme, client.BaseURL.Host, strings.TrimSuffix(client.BaseURL.Path, "api/v3/"))
} else {
client = github.NewClient(httpClient)
githubBaseURL = "https://github.com/"
if len(c.URL) > 0 {
baseUrl, err := url.Parse(c.URL)
if err != nil {
return nil, fmt.Errorf("github client creation failed: %v", err)
}
if !strings.HasSuffix(baseUrl.Path, "/") {
baseUrl.Path += "/"
}
client.BaseURL = baseUrl
}
if len(c.UploadURL) > 0 {
uploadUrl, err := url.Parse(c.UploadURL)
if err != nil {
return nil, fmt.Errorf("github client creation failed: %v", err)
}
if !strings.HasSuffix(uploadUrl.Path, "/") {
uploadUrl.Path += "/"
}
client.UploadURL = uploadUrl
}
if len(c.RunnerGitHubURL) > 0 {
githubBaseURL = c.RunnerGitHubURL
if !strings.HasSuffix(githubBaseURL, "/") {
githubBaseURL += "/"
}
}
}
client.UserAgent = "actions-runner-controller/" + build.Version
return &Client{
Client: client,
regTokens: map[string]*github.RegistrationToken{},
mu: sync.Mutex{},
GithubBaseURL: githubBaseURL,
IsEnterprise: isEnterprise,
}, nil
}
// GetRegistrationToken returns a registration token tied with the name of repository and runner.
func (c *Client) GetRegistrationToken(ctx context.Context, enterprise, org, repo, name string) (*github.RegistrationToken, error) {
c.mu.Lock()
defer c.mu.Unlock()
key := getRegistrationKey(org, repo, enterprise)
rt, ok := c.regTokens[key]
// We'd like to allow the runner just starting up to miss the expiration date by a bit.
// Note that this means that we're going to cache Creation Registraion Token API response longer than the
// recommended cache duration.
//
// https://docs.github.com/en/rest/reference/actions#create-a-registration-token-for-a-repository
// https://docs.github.com/en/rest/reference/actions#create-a-registration-token-for-an-organization
// https://docs.github.com/en/rest/reference/actions#create-a-registration-token-for-an-enterprise
// https://docs.github.com/en/rest/overview/resources-in-the-rest-api#conditional-requests
//
// This is currently set to 30 minutes as the result of the discussion took place at the following issue:
// https://github.com/actions/actions-runner-controller/issues/1295
runnerStartupTimeout := 30 * time.Minute
if ok && rt.GetExpiresAt().After(time.Now().Add(runnerStartupTimeout)) {
return rt, nil
}
enterprise, owner, repo, err := getEnterpriseOrganizationAndRepo(enterprise, org, repo)
if err != nil {
return rt, err
}
rt, res, err := c.createRegistrationToken(ctx, enterprise, owner, repo)
if err != nil {
return nil, fmt.Errorf("failed to create registration token: %v", err)
}
if res.StatusCode != 201 {
return nil, fmt.Errorf("unexpected status: %d", res.StatusCode)
}
c.regTokens[key] = rt
go func() {
c.cleanup()
}()
return rt, nil
}
// RemoveRunner removes a runner with specified runner ID from repository.
func (c *Client) RemoveRunner(ctx context.Context, enterprise, org, repo string, runnerID int64) error {
enterprise, owner, repo, err := getEnterpriseOrganizationAndRepo(enterprise, org, repo)
if err != nil {
return err
}
res, err := c.removeRunner(ctx, enterprise, owner, repo, runnerID)
if err != nil {
return fmt.Errorf("failed to remove runner: %w", err)
}
if res.StatusCode != 204 {
return fmt.Errorf("unexpected status: %d", res.StatusCode)
}
return nil
}
// ListRunners returns a list of runners of specified owner/repository name.
func (c *Client) ListRunners(ctx context.Context, enterprise, org, repo string) ([]*github.Runner, error) {
enterprise, owner, repo, err := getEnterpriseOrganizationAndRepo(enterprise, org, repo)
if err != nil {
return nil, err
}
var runners []*github.Runner
opts := github.ListOptions{PerPage: 100}
for {
list, res, err := c.listRunners(ctx, enterprise, owner, repo, &opts)
if err != nil {
return runners, fmt.Errorf("failed to list runners: %w", err)
}
runners = append(runners, list.Runners...)
if res.NextPage == 0 {
break
}
opts.Page = res.NextPage
}
return runners, nil
}
// ListOrganizationRunnerGroupsForRepository returns all the runner groups defined in the organization and
// inherited to the organization from an enterprise.
// We can remove this when google/go-github library is updated to support this.
func (c *Client) ListOrganizationRunnerGroupsForRepository(ctx context.Context, org, repo string) ([]*github.RunnerGroup, error) {
var runnerGroups []*github.RunnerGroup
var opts github.ListOrgRunnerGroupOptions
opts.PerPage = 100
repoName := repo
parts := strings.Split(repo, "/")
if len(parts) == 2 {
repoName = parts[1]
}
// This must be the repo name without the owner part, so in case the repo is "myorg/myrepo" the repo name
// passed to visible_to_repository must be "myrepo".
opts.VisibleToRepository = repoName
for {
list, res, err := c.Actions.ListOrganizationRunnerGroups(ctx, org, &opts)
if err != nil {
return runnerGroups, fmt.Errorf("failed to list organization runner groups: %w", err)
}
runnerGroups = append(runnerGroups, list.RunnerGroups...)
if res.NextPage == 0 {
break
}
opts.Page = res.NextPage
}
return runnerGroups, nil
}
func (c *Client) ListRunnerGroupRepositoryAccesses(ctx context.Context, org string, runnerGroupId int64) ([]*github.Repository, error) {
var repos []*github.Repository
opts := github.ListOptions{PerPage: 100}
for {
list, res, err := c.Client.Actions.ListRepositoryAccessRunnerGroup(ctx, org, runnerGroupId, &opts)
if err != nil {
return nil, fmt.Errorf("failed to list repository access for runner group: %w", err)
}
repos = append(repos, list.Repositories...)
if res.NextPage == 0 {
break
}
opts.Page = res.NextPage
}
return repos, nil
}
// cleanup removes expired registration tokens.
func (c *Client) cleanup() {
c.mu.Lock()
defer c.mu.Unlock()
for key, rt := range c.regTokens {
if rt.GetExpiresAt().Before(time.Now()) {
delete(c.regTokens, key)
}
}
}
// wrappers for github functions (switch between enterprise/organization/repository mode)
// so the calling functions don't need to switch and their code is a bit cleaner
func (c *Client) createRegistrationToken(ctx context.Context, enterprise, org, repo string) (*github.RegistrationToken, *github.Response, error) {
if len(repo) > 0 {
return c.Client.Actions.CreateRegistrationToken(ctx, org, repo)
}
if len(org) > 0 {
return c.Client.Actions.CreateOrganizationRegistrationToken(ctx, org)
}
return c.Client.Enterprise.CreateRegistrationToken(ctx, enterprise)
}
func (c *Client) removeRunner(ctx context.Context, enterprise, org, repo string, runnerID int64) (*github.Response, error) {
if len(repo) > 0 {
return c.Client.Actions.RemoveRunner(ctx, org, repo, runnerID)
}
if len(org) > 0 {
return c.Client.Actions.RemoveOrganizationRunner(ctx, org, runnerID)
}
return c.Client.Enterprise.RemoveRunner(ctx, enterprise, runnerID)
}
func (c *Client) listRunners(ctx context.Context, enterprise, org, repo string, opts *github.ListOptions) (*github.Runners, *github.Response, error) {
if len(repo) > 0 {
return c.Client.Actions.ListRunners(ctx, org, repo, opts)
}
if len(org) > 0 {
return c.Client.Actions.ListOrganizationRunners(ctx, org, opts)
}
return c.Client.Enterprise.ListRunners(ctx, enterprise, opts)
}
func (c *Client) ListRepositoryWorkflowRuns(ctx context.Context, user string, repoName string) ([]*github.WorkflowRun, error) {
queued, err := c.listRepositoryWorkflowRuns(ctx, user, repoName, "queued")
if err != nil {
return nil, fmt.Errorf("listing queued workflow runs: %w", err)
}
inProgress, err := c.listRepositoryWorkflowRuns(ctx, user, repoName, "in_progress")
if err != nil {
return nil, fmt.Errorf("listing in_progress workflow runs: %w", err)
}
var workflowRuns []*github.WorkflowRun
workflowRuns = append(workflowRuns, queued...)
workflowRuns = append(workflowRuns, inProgress...)
return workflowRuns, nil
}
func (c *Client) listRepositoryWorkflowRuns(ctx context.Context, user string, repoName, status string) ([]*github.WorkflowRun, error) {
var workflowRuns []*github.WorkflowRun
opts := github.ListWorkflowRunsOptions{
ListOptions: github.ListOptions{
PerPage: 100,
},
Status: status,
}
for {
list, res, err := c.Client.Actions.ListRepositoryWorkflowRuns(ctx, user, repoName, &opts)
if err != nil {
return workflowRuns, fmt.Errorf("failed to list workflow runs: %v", err)
}
workflowRuns = append(workflowRuns, list.WorkflowRuns...)
if res.NextPage == 0 {
break
}
opts.Page = res.NextPage
}
return workflowRuns, nil
}
// Validates enterprise, organization and repo arguments. Both are optional, but at least one should be specified
func getEnterpriseOrganizationAndRepo(enterprise, org, repo string) (string, string, string, error) {
if len(repo) > 0 {
owner, repository, err := splitOwnerAndRepo(repo)
return "", owner, repository, err
}
if len(org) > 0 {
return "", org, "", nil
}
if len(enterprise) > 0 {
return enterprise, "", "", nil
}
return "", "", "", fmt.Errorf("enterprise, organization and repository are all empty")
}
func getRegistrationKey(org, repo, enterprise string) string {
return fmt.Sprintf("org=%s,repo=%s,enterprise=%s", org, repo, enterprise)
}
func splitOwnerAndRepo(repo string) (string, string, error) {
chunk := strings.Split(repo, "/")
if len(chunk) != 2 {
return "", "", fmt.Errorf("invalid repository name: '%s'", repo)
}
return chunk[0], chunk[1], nil
}
func getEnterpriseApiUrl(baseURL string) (string, error) {
baseEndpoint, err := url.Parse(baseURL)
if err != nil {
return "", err
}
if !strings.HasSuffix(baseEndpoint.Path, "/") {
baseEndpoint.Path += "/"
}
if !strings.HasSuffix(baseEndpoint.Path, "/api/v3/") &&
!strings.HasPrefix(baseEndpoint.Host, "api.") &&
!strings.Contains(baseEndpoint.Host, ".api.") {
baseEndpoint.Path += "api/v3/"
}
// Trim trailing slash, otherwise there's double slash added to token endpoint
return fmt.Sprintf("%s://%s%s", baseEndpoint.Scheme, baseEndpoint.Host, strings.TrimSuffix(baseEndpoint.Path, "/")), nil
}
type RunnerNotFound struct {
runnerName string
}
func (e *RunnerNotFound) Error() string {
return fmt.Sprintf("runner %q not found", e.runnerName)
}
type RunnerOffline struct {
runnerName string
}
func (e *RunnerOffline) Error() string {
return fmt.Sprintf("runner %q offline", e.runnerName)
}
func (r *Client) IsRunnerBusy(ctx context.Context, enterprise, org, repo, name string) (bool, error) {
runners, err := r.ListRunners(ctx, enterprise, org, repo)
if err != nil {
return false, err
}
for _, runner := range runners {
if runner.GetName() == name {
if runner.GetStatus() == "offline" {
return runner.GetBusy(), &RunnerOffline{runnerName: name}
}
return runner.GetBusy(), nil
}
}
return false, &RunnerNotFound{runnerName: name}
}
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