// Stops the agent from accepting new work and cancels any current work it's
// running
func (a *AgentWorker) Stop() {
// Only allow one stop to run at a time (because we're playing with channels)
a.stopMutex.Lock()
if a.stopping {
logger.Debug("Agent is already stopping...")
return
} else {
logger.Debug("Stopping the agent...")
}
// If ther'es a running job, kill it.
if a.jobRunner != nil {
a.jobRunner.Kill()
}
// If we have a ticker, stop it, and send a signal to the stop channel,
// which will cause the agent worker to stop looping immediatly.
if a.ticker != nil {
close(a.stop)
}
// Mark the agent as stopping
a.stopping = true
// Unlock the stop mutex
a.stopMutex.Unlock()
}
// The actual log streamer worker
func Worker(id int, ls *LogStreamer) {
logger.Debug("[LogStreamer/Worker#%d] Worker is starting...", id)
var chunk *LogStreamerChunk
for {
// Get the next chunk (pointer) from the queue. This will block
// until something is returned.
chunk = <-ls.queue
// If the next chunk is nil, then there is no more work to do
if chunk == nil {
break
}
// Upload the chunk
err := ls.Callback(chunk)
if err != nil {
atomic.AddInt32(&ls.ChunksFailedCount, 1)
logger.Error("Giving up on uploading chunk %d, this will result in only a partial build log on Buildkite", chunk.Order)
}
// Signal to the chunkWaitGroup that this one is done
ls.chunkWaitGroup.Done()
}
logger.Debug("[LogStreamer/Worker#%d] Worker has shutdown", id)
}
func (u *S3Uploader) Upload(artifact *api.Artifact) error {
permission := "public-read"
if os.Getenv("BUILDKITE_S3_ACL") != "" {
permission = os.Getenv("BUILDKITE_S3_ACL")
} else if os.Getenv("AWS_S3_ACL") != "" {
permission = os.Getenv("AWS_S3_ACL")
}
// The dirtiest validation method ever...
if permission != "private" &&
permission != "public-read" &&
permission != "public-read-write" &&
permission != "authenticated-read" &&
permission != "bucket-owner-read" &&
permission != "bucket-owner-full-control" {
logger.Fatal("Invalid S3 ACL `%s`", permission)
}
Perms := s3.ACL(permission)
logger.Debug("Reading file \"%s\"", artifact.AbsolutePath)
data, err := ioutil.ReadFile(artifact.AbsolutePath)
if err != nil {
return errors.New("Failed to read file " + artifact.AbsolutePath + " (" + err.Error() + ")")
}
logger.Debug("Uploading \"%s\" to bucket with permission `%s`", u.artifactPath(artifact), permission)
err = u.Bucket.Put(u.artifactPath(artifact), data, u.mimeType(artifact), Perms, s3.Options{})
if err != nil {
return errors.New(fmt.Sprintf("Failed to PUT file \"%s\" (%s)", u.artifactPath(artifact), err.Error()))
}
return nil
}
func (h *HeaderTimesStreamer) Start() error {
h.streaming = true
go func() {
logger.Debug("[HeaderTimesStreamer] Streamer has started...")
for true {
// Break out of streaming if it's finished. We also
// need to aquire a read lock on the flag because it
// can be modified by other routines.
h.streamingMutex.Lock()
if !h.streaming {
break
}
h.streamingMutex.Unlock()
// Upload any pending header times
h.Upload()
// Sleep for a second and try upload some more later
time.Sleep(1 * time.Second)
}
logger.Debug("[HeaderTimesStreamer] Streamer has finished...")
}()
return nil
}
func (h *HeaderTimesStreamer) Upload() {
// Store the current cursor value
c := h.cursor
// Grab only the times that we haven't uploaded yet. We need to aquire
// a lock since other routines may be adding to it.
h.timesMutex.Lock()
length := len(h.times)
times := h.times[h.cursor:length]
h.timesMutex.Unlock()
// Construct the payload to send to the server
payload := map[string]string{}
for index, time := range times {
payload[strconv.Itoa(h.cursor+index)] = time
}
// Save the cursor we're up to
h.cursor = length
// How many times are we uploading this time
timesToUpload := len(times)
// Do we even have some times to upload
if timesToUpload > 0 {
// Call our callback with the times for upload
logger.Debug("[HeaderTimesStreamer] Uploading header times %d..%d", c, length-1)
h.UploadCallback(c, length, payload)
logger.Debug("[HeaderTimesStreamer] Finished uploading header times %d..%d", c, length-1)
// Decrement the wait group for every time we've uploaded.
h.uploadWaitGroup.Add(timesToUpload * -1)
}
}
// Do sends an API request and returns the API response. The API response is
// JSON decoded and stored in the value pointed to by v, or returned as an
// error if an API error has occurred. If v implements the io.Writer
// interface, the raw response body will be written to v, without attempting to
// first decode it.
func (c *Client) Do(req *http.Request, v interface{}) (*Response, error) {
var err error
if c.DebugHTTP {
// If the request is a multi-part form, then it's probably a
// file upload, in which case we don't want to spewing out the
// file contents into the debug log (especially if it's been
// gzipped)
var requestDump []byte
if strings.Contains(req.Header.Get("Content-Type"), "multipart/form-data") {
requestDump, err = httputil.DumpRequestOut(req, false)
} else {
requestDump, err = httputil.DumpRequestOut(req, true)
}
logger.Debug("ERR: %s\n%s", err, string(requestDump))
}
ts := time.Now()
logger.Debug("%s %s", req.Method, req.URL)
resp, err := c.client.Do(req)
if err != nil {
return nil, err
}
logger.Debug("↳ %s %s (%s %s)", req.Method, req.URL, resp.Status, time.Now().Sub(ts))
defer resp.Body.Close()
defer io.Copy(ioutil.Discard, resp.Body)
response := newResponse(resp)
if c.DebugHTTP {
responseDump, err := httputil.DumpResponse(resp, true)
logger.Debug("\nERR: %s\n%s", err, string(responseDump))
}
err = checkResponse(resp)
if err != nil {
// even though there was an error, we still return the response
// in case the caller wants to inspect it further
return response, err
}
if v != nil {
if w, ok := v.(io.Writer); ok {
io.Copy(w, resp.Body)
} else {
err = json.NewDecoder(resp.Body).Decode(v)
}
}
return response, err
}
func (h *HeaderTimesStreamer) Stop() {
logger.Debug("[HeaderTimesStreamer] Waiting for all the lines to be scanned")
h.scanWaitGroup.Wait()
logger.Debug("[HeaderTimesStreamer] Waiting for all the header times to be uploaded")
h.uploadWaitGroup.Wait()
// Since we're modifying the waitGroup and the streaming flag, we need
// to aquire a write lock.
h.streamingMutex.Lock()
h.streaming = false
h.streamingMutex.Unlock()
}
// Waits for all the chunks to be uploaded, then shuts down all the workers
func (ls *LogStreamer) Stop() error {
logger.Debug("[LogStreamer] Waiting for all the chunks to be uploaded")
ls.chunkWaitGroup.Wait()
logger.Debug("[LogStreamer] Shutting down all workers")
for n := 0; n < ls.Concurrency; n++ {
ls.queue <- nil
}
return nil
}
// Runs the job
func (r *JobRunner) Run() error {
logger.Info("Starting job %s", r.Job.ID)
// Start the build in the Buildkite Agent API. This is the first thing
// we do so if it fails, we don't have to worry about cleaning things
// up like started log streamer workers, etc.
if err := r.startJob(time.Now()); err != nil {
return err
}
// Start the log streamer
if err := r.logStreamer.Start(); err != nil {
return err
}
// Start the process. This will block until it finishes.
if err := r.process.Start(); err != nil {
// Send the error as output
r.logStreamer.Process(fmt.Sprintf("%s", err))
} else {
// Add the final output to the streamer
r.logStreamer.Process(r.process.Output())
}
// Store the finished at time
finishedAt := time.Now()
// Wait until all the header times have finished uploading
logger.Debug("Waiting for header times to finish uploading")
r.headerTimesStreamer.Wait()
// Stop the log streamer. This will block until all the chunks have
// been uploaded
r.logStreamer.Stop()
// Warn about failed chunks
if r.logStreamer.ChunksFailedCount > 0 {
logger.Warn("%d chunks failed to upload for this job", r.logStreamer.ChunksFailedCount)
}
// Finish the build in the Buildkite Agent API
r.finishJob(finishedAt, r.process.ExitStatus, int(r.logStreamer.ChunksFailedCount))
// Wait for the routines that we spun up to finish
logger.Debug("Waiting for all other routines to finish")
r.wg.Wait()
logger.Info("Finished job %s", r.Job.ID)
return nil
}
func (r *JobRunner) onProcessStartCallback() {
// Start a routine that will grab the output every few seconds and send
// it back to Buildkite
go func() {
// Add to the wait group
r.wg.Add(1)
for r.process.Running {
// Send the output of the process to the log streamer
// for processing
r.logStreamer.Process(r.process.Output())
// Check the output in another second
time.Sleep(1 * time.Second)
}
// Mark this routine as done in the wait group
r.wg.Done()
logger.Debug("Routine that processes the log has finished")
}()
// Start a routine that will grab the output every few seconds and send it back to Buildkite
go func() {
// Add to the wait group
r.wg.Add(1)
for r.process.Running {
// Re-get the job and check it's status to see if it's been
// cancelled
jobState, _, err := r.APIClient.Jobs.GetState(r.Job.ID)
if err != nil {
// We don't really care if it fails, we'll just
// try again in a second anyway
logger.Warn("Problem with getting job state %s (%s)", r.Job.ID, err)
} else if jobState.State == "canceling" || jobState.State == "canceled" {
r.Kill()
}
// Check for cancellations every few seconds
time.Sleep(3 * time.Second)
}
// Mark this routine as done in the wait group
r.wg.Done()
logger.Debug("Routine that refreshes the job has finished")
}()
}
func (p *Process) signal(sig os.Signal) error {
if p.command != nil && p.command.Process != nil {
logger.Debug("[Process] Sending signal: %s to PID: %d", sig.String(), p.Pid)
err := p.command.Process.Signal(syscall.SIGTERM)
if err != nil {
logger.Error("[Process] Failed to send signal: %s to PID: %d (%T: %v)", sig.String(), p.Pid, err, err)
return err
}
} else {
logger.Debug("[Process] No process to signal yet")
}
return nil
}
func (a *ArtifactUploader) collect() (artifacts []*api.Artifact, err error) {
globPaths := strings.Split(a.Paths, ";")
for _, globPath := range globPaths {
workingDirectory := a.WorkingDirectory(globPath)
globPath = strings.TrimSpace(globPath)
if globPath != "" {
logger.Debug("Searching for %s", a.NormalizedPath(globPath))
files, err := glob.Glob(workingDirectory, globPath)
if err != nil {
return nil, err
}
for _, file := range files {
// Generate an absolute path for the artifact
absolutePath, err := filepath.Abs(file)
if err != nil {
return nil, err
}
fileInfo, err := os.Stat(absolutePath)
if fileInfo.IsDir() {
logger.Debug("Skipping directory %s", file)
continue
}
// Create a relative path (from the workingDirectory) to the artifact, by removing the
// first part of the absolutePath that is the workingDirectory.
relativePath := strings.Replace(absolutePath, workingDirectory, "", 1)
// Ensure the relativePath doesn't have a file seperator "/" as the first character
relativePath = strings.TrimPrefix(relativePath, string(os.PathSeparator))
// Build an artifact object using the paths we have.
artifact, err := a.build(relativePath, absolutePath, globPath)
if err != nil {
return nil, err
}
artifacts = append(artifacts, artifact)
}
}
}
return artifacts, nil
}
func (u *S3Uploader) Setup(destination string, debugHTTP bool) error {
u.Destination = destination
u.DebugHTTP = debugHTTP
// Try to auth with S3
auth, err := awsS3Auth()
if err != nil {
return errors.New(fmt.Sprintf("Error creating AWS S3 authentication: %s", err.Error()))
}
// Try and get the region
region, err := awsS3Region()
if err != nil {
return err
}
logger.Debug("Authorizing S3 credentials and finding bucket `%s` in region `%s`...", u.BucketName(), region.Name)
// Find the bucket
s3 := s3.New(auth, region)
bucket := s3.Bucket(u.BucketName())
// If the list doesn't return an error, then we've got our bucket
_, err = bucket.List("", "", "", 0)
if err != nil {
return errors.New("Could not find bucket `" + u.BucketName() + "` in region `" + region.Name + "` (" + err.Error() + ")")
}
u.Bucket = bucket
return nil
}
func Run(command string, arg ...string) (string, error) {
output, err := exec.Command(command, arg...).Output()
if err != nil {
logger.Debug("Could not run: %s %s (returned %s) (%T: %v)", command, arg, output, err, err)
return "", err
}
return strings.Trim(fmt.Sprintf("%s", output), "\n"), nil
}
func (r *JobRunner) onUploadHeaderTime(cursor int, total int, times map[string]string) {
retry.Do(func(s *retry.Stats) error {
logger.Debug("Uploading header times %d..%d (%d)", cursor+1, total, len(times))
_, err := r.APIClient.HeaderTimes.Save(r.Job.ID, &api.HeaderTimes{Times: times})
if err != nil {
logger.Warn("%s (%s)", err, s)
}
return err
}, &retry.Config{Maximum: 10, Interval: 1 * time.Second})
}
func (u *GSUploader) Upload(artifact *api.Artifact) error {
permission := os.Getenv("BUILDKITE_GS_ACL")
// The dirtiest validation method ever...
if permission != "" &&
permission != "authenticatedRead" &&
permission != "private" &&
permission != "projectPrivate" &&
permission != "publicRead" &&
permission != "publicReadWrite" {
logger.Fatal("Invalid GS ACL `%s`", permission)
}
if permission == "" {
logger.Debug("Uploading \"%s\" to bucket \"%s\" with default permission",
u.artifactPath(artifact), u.BucketName())
} else {
logger.Debug("Uploading \"%s\" to bucket \"%s\" with permission \"%s\"",
u.artifactPath(artifact), u.BucketName(), permission)
}
object := &storage.Object{
Name: u.artifactPath(artifact),
ContentType: u.mimeType(artifact),
}
file, err := os.Open(artifact.AbsolutePath)
if err != nil {
return errors.New(fmt.Sprintf("Failed to open file \"%q\" (%v)", artifact.AbsolutePath, err))
}
call := u.Service.Objects.Insert(u.BucketName(), object)
if permission != "" {
call = call.PredefinedAcl(permission)
}
if res, err := call.Media(file).Do(); err == nil {
logger.Debug("Created object %v at location %v\n\n", res.Name, res.SelfLink)
} else {
return errors.New(fmt.Sprintf("Failed to PUT file \"%s\" (%v)", u.artifactPath(artifact), err))
}
return nil
}
func (d S3Downloader) Start() error {
// Try to auth with S3
auth, err := awsS3Auth()
if err != nil {
return errors.New(fmt.Sprintf("Error creating AWS S3 authentication: %s", err.Error()))
}
// Try and get the region
region, err := awsS3Region()
if err != nil {
return err
}
// Split apart the bucket
bucketParts := strings.Split(strings.TrimLeft(d.Bucket, "s3://"), "/")
bucketName := bucketParts[0]
bucketPath := strings.Join(bucketParts[1:len(bucketParts)], "/")
logger.Debug("Authorizing S3 credentials and finding bucket `%s` in region `%s`...", bucketName, region.Name)
// Find the bucket
s3 := s3.New(auth, region)
bucket := s3.Bucket(bucketName)
// If the list doesn't return an error, then we've got our bucket
_, err = bucket.List("", "", "", 0)
if err != nil {
return errors.New("Could not find bucket `" + bucketName + "` in region `" + region.Name + "` (" + err.Error() + ")")
}
// Create the location of the file
var s3Location string
if bucketPath != "" {
s3Location = strings.TrimRight(bucketPath, "/") + "/" + strings.TrimLeft(d.Path, "/")
} else {
s3Location = d.Path
}
// Generate a Signed URL
signedURL := bucket.SignedURL(s3Location, time.Now().Add(time.Hour))
// We can now cheat and pass the URL onto our regular downloader
return Download{
URL: signedURL,
Path: d.Path,
Destination: d.Destination,
Retries: d.Retries,
DebugHTTP: d.DebugHTTP,
}.Start()
}
func (h *HeaderTimesStreamer) Scan(line string) {
// Keep track of how many line scans we need to do
h.scanWaitGroup.Add(1)
defer h.scanWaitGroup.Done()
if h.lineIsHeader(line) {
logger.Debug("[HeaderTimesStreamer] Found header %q", line)
// Aquire a lock on the times and then add the current time to
// our times slice.
h.timesMutex.Lock()
h.times = append(h.times, time.Now().UTC().Format(time.RFC3339Nano))
h.timesMutex.Unlock()
// Add the time to the wait group
h.uploadWaitGroup.Add(1)
}
}
// Performs a heatbeat
func (a *AgentWorker) Heartbeat() error {
var beat *api.Heartbeat
var err error
// Retry the heartbeat a few times
err = retry.Do(func(s *retry.Stats) error {
beat, _, err = a.APIClient.Heartbeats.Beat()
if err != nil {
logger.Warn("%s (%s)", err, s)
}
return err
}, &retry.Config{Maximum: 5, Interval: 1 * time.Second})
if err != nil {
return err
}
logger.Debug("Heartbeat sent at %s and received at %s", beat.SentAt, beat.ReceivedAt)
return nil
}
// Shows the welcome banner and the configuration options used when starting
// this agent.
func (r *AgentPool) ShowBanner() {
welcomeMessage :=
"\n" +
"%s _ _ _ _ _ _ _ _\n" +
" | | (_) | | | | (_) | | |\n" +
" | |__ _ _ _| | __| | | ___| |_ ___ __ _ __ _ ___ _ __ | |_\n" +
" | '_ \\| | | | | |/ _` | |/ / | __/ _ \\ / _` |/ _` |/ _ \\ '_ \\| __|\n" +
" | |_) | |_| | | | (_| | <| | || __/ | (_| | (_| | __/ | | | |_\n" +
" |_.__/ \\__,_|_|_|\\__,_|_|\\_\\_|\\__\\___| \\__,_|\\__, |\\___|_| |_|\\__|\n" +
" __/ |\n" +
" http://buildkite.com/agent |___/\n%s\n"
if logger.ColorsEnabled() {
fmt.Fprintf(logger.OutputPipe(), welcomeMessage, "\x1b[32m", "\x1b[0m")
} else {
fmt.Fprintf(logger.OutputPipe(), welcomeMessage, "", "")
}
logger.Notice("Starting buildkite-agent v%s with PID: %s", Version(), fmt.Sprintf("%d", os.Getpid()))
logger.Notice("The agent source code can be found here: https://github.com/buildkite/agent")
logger.Notice("For questions and support, email us at: [email protected]")
if r.ConfigFilePath != "" {
logger.Info("Configuration loaded from: %s", r.ConfigFilePath)
}
logger.Debug("Bootstrap command: %s", r.AgentConfiguration.BootstrapScript)
logger.Debug("Build path: %s", r.AgentConfiguration.BuildPath)
logger.Debug("Hooks directory: %s", r.AgentConfiguration.HooksPath)
logger.Debug("Plugins directory: %s", r.AgentConfiguration.PluginsPath)
if !r.AgentConfiguration.SSHFingerprintVerification {
logger.Debug("Automatic SSH fingerprint verification has been disabled")
}
if !r.AgentConfiguration.CommandEval {
logger.Debug("Evaluating console commands has been disabled")
}
if !r.AgentConfiguration.RunInPty {
logger.Debug("Running builds within a pseudoterminal (PTY) has been disabled")
}
}
func (u *S3Uploader) Setup(destination string) error {
u.Destination = destination
// Try to auth with S3
auth, err := awsS3Auth()
if err != nil {
return errors.New(fmt.Sprintf("Error creating AWS S3 authentication: %s", err.Error()))
}
regionName := "us-east-1"
if os.Getenv("BUILDKITE_S3_DEFAULT_REGION") != "" {
regionName = os.Getenv("BUILDKITE_S3_DEFAULT_REGION")
} else if os.Getenv("AWS_DEFAULT_REGION") != "" {
regionName = os.Getenv("AWS_DEFAULT_REGION")
}
// Check to make sure the region exists. There is a GetRegion API, but
// there doesn't seem to be a way to make it error out if the region
// doesn't exist.
region, ok := aws.Regions[regionName]
if ok == false {
return errors.New("Unknown AWS S3 Region `" + regionName + "`")
}
logger.Debug("Authorizing S3 credentials and finding bucket `%s` in region `%s`...", u.bucketName(), regionName)
// Find the bucket
s3 := s3.New(auth, region)
bucket := s3.Bucket(u.bucketName())
// If the list doesn't return an error, then we've got our bucket
_, err = bucket.List("", "", "", 0)
if err != nil {
return errors.New("Could not find bucket `" + u.bucketName() + "` in region `" + region.Name + "` (" + err.Error() + ")")
}
u.Bucket = bucket
return nil
}
func (d S3Downloader) Start() error {
// Try to auth with S3
auth, err := awsS3Auth()
if err != nil {
return errors.New(fmt.Sprintf("Error creating AWS S3 authentication: %s", err.Error()))
}
// Try and get the region
region, err := awsS3Region()
if err != nil {
return err
}
logger.Debug("Authorizing S3 credentials and finding bucket `%s` in region `%s`...", d.BucketName(), region.Name)
// Find the bucket
s3 := s3.New(auth, region)
bucket := s3.Bucket(d.BucketName())
// If the list doesn't return an error, then we've got our bucket
_, err = bucket.List("", "", "", 0)
if err != nil {
return errors.New("Could not find bucket `" + d.BucketName() + "` in region `" + region.Name + "` (" + err.Error() + ")")
}
// Generate a Signed URL
signedURL := bucket.SignedURL(d.BucketFileLocation(), time.Now().Add(time.Hour))
// We can now cheat and pass the URL onto our regular downloader
return Download{
Client: *http.DefaultClient,
URL: signedURL,
Path: d.Path,
Destination: d.Destination,
Retries: d.Retries,
DebugHTTP: d.DebugHTTP,
}.Start()
}
func (u *FormUploader) Upload(artifact *api.Artifact) error {
// Create a HTTP request for uploading the file
request, err := createUploadRequest(artifact)
if err != nil {
return err
}
// Create the client
client := &http.Client{}
// Perform the request
logger.Debug("%s %s", request.Method, request.URL)
response, err := client.Do(request)
// Check for errors
if err != nil {
return err
} else {
// Be sure to close the response body at the end of
// this function
defer response.Body.Close()
if response.StatusCode/100 != 2 {
body := &bytes.Buffer{}
_, err := body.ReadFrom(response.Body)
if err != nil {
return err
}
// Return a custom error with the response body from the page
message := fmt.Sprintf("%s (%d)", body, response.StatusCode)
return errors.New(message)
}
}
return nil
}
// Setup the any global configuration options
HandleGlobalFlags(cfg)
// Find the artifact we want to show the SHASUM for
searcher := agent.ArtifactSearcher{
APIClient: agent.APIClient{
Endpoint: cfg.Endpoint,
Token: cfg.AgentAccessToken,
}.Create(),
BuildID: cfg.Build,
}
artifacts, err := searcher.Search(cfg.Query, cfg.Step)
if err != nil {
logger.Fatal("Failed to find artifacts: %s", err)
}
artifactsFoundLength := len(artifacts)
if artifactsFoundLength == 0 {
logger.Fatal("No artifacts found for downloading")
} else if artifactsFoundLength > 1 {
logger.Fatal("Multiple artifacts were found. Try being more specific with the search or scope by step")
} else {
logger.Debug("Artifact \"%s\" found", artifacts[0].Path)
fmt.Printf("%s\n", artifacts[0].Sha1Sum)
}
},
}
func (d Download) try() error {
// If we're downloading a file with a path of "pkg/foo.txt" to a folder
// called "pkg", we should merge the two paths together. So, instead of it
// downloading to: destination/pkg/pkg/foo.txt, it will just download to
// destination/pkg/foo.txt
destinationPaths := strings.Split(d.Destination, string(os.PathSeparator))
downloadPaths := strings.Split(d.Path, string(os.PathSeparator))
for i := 0; i < len(downloadPaths); i += 100 {
// If the last part of the destination path matches
// this path in the download, then cut it out.
lastIndex := len(destinationPaths) - 1
// Break if we've gone too far.
if lastIndex == -1 {
break
}
lastPathInDestination := destinationPaths[lastIndex]
if lastPathInDestination == downloadPaths[i] {
destinationPaths = destinationPaths[:lastIndex]
}
}
finalizedDestination := strings.Join(destinationPaths, string(os.PathSeparator))
targetFile := filepath.Join(finalizedDestination, d.Path)
targetDirectory, _ := filepath.Split(targetFile)
// Show a nice message that we're starting to download the file
logger.Debug("Downloading %s to %s", d.URL, targetFile)
// Start by downloading the file
response, err := d.Client.Get(d.URL)
if err != nil {
return fmt.Errorf("Error while downloading %s (%T: %v)", d.URL, err, err)
}
defer response.Body.Close()
// Double check the status
if response.StatusCode/100 != 2 && response.StatusCode/100 != 3 {
if d.DebugHTTP {
responseDump, err := httputil.DumpResponse(response, true)
logger.Debug("\nERR: %s\n%s", err, string(responseDump))
}
return &downloadError{response.Status}
}
// Now make the folder for our file
err = os.MkdirAll(targetDirectory, 0777)
if err != nil {
return fmt.Errorf("Failed to create folder for %s (%T: %v)", targetFile, err, err)
}
// Create a file to handle the file
fileBuffer, err := os.Create(targetFile)
if err != nil {
return fmt.Errorf("Failed to create file %s (%T: %v)", targetFile, err, err)
}
defer fileBuffer.Close()
// Copy the data to the file
bytes, err := io.Copy(fileBuffer, response.Body)
if err != nil {
return fmt.Errorf("Error when copying data %s (%T: %v)", d.URL, err, err)
}
logger.Info("Successfully downloaded \"%s\" %d bytes", d.Path, bytes)
return nil
}
func (p *Process) Start() error {
c, err := shell.CommandFromString(p.Script)
if err != nil {
return err
}
p.command = exec.Command(c.Command, c.Args...)
// Copy the current processes ENV and merge in the new ones. We do this
// so the sub process gets PATH and stuff. We merge our path in over
// the top of the current one so the ENV from Buildkite and the agent
// take precedence over the agent
currentEnv := os.Environ()
p.command.Env = append(currentEnv, p.Env...)
var waitGroup sync.WaitGroup
lineReaderPipe, lineWriterPipe := io.Pipe()
multiWriter := io.MultiWriter(&p.buffer, lineWriterPipe)
logger.Info("Starting to run: %s", c.String())
// Toggle between running in a pty
if p.PTY {
pty, err := StartPTY(p.command)
if err != nil {
p.ExitStatus = "1"
return err
}
p.Pid = p.command.Process.Pid
p.setRunning(true)
waitGroup.Add(1)
go func() {
logger.Debug("[Process] Starting to copy PTY to the buffer")
// Copy the pty to our buffer. This will block until it
// EOF's or something breaks.
_, err = io.Copy(multiWriter, pty)
if e, ok := err.(*os.PathError); ok && e.Err == syscall.EIO {
// We can safely ignore this error, because
// it's just the PTY telling us that it closed
// successfully. See:
// https://github.com/buildkite/agent/pull/34#issuecomment-46080419
err = nil
}
if err != nil {
logger.Error("[Process] PTY output copy failed with error: %T: %v", err, err)
} else {
logger.Debug("[Process] PTY has finished being copied to the buffer")
}
waitGroup.Done()
}()
} else {
p.command.Stdout = multiWriter
p.command.Stderr = multiWriter
p.command.Stdin = nil
err := p.command.Start()
if err != nil {
p.ExitStatus = "1"
return err
}
p.Pid = p.command.Process.Pid
p.setRunning(true)
}
logger.Info("[Process] Process is running with PID: %d", p.Pid)
// Add the line callback routine to the waitGroup
waitGroup.Add(1)
go func() {
logger.Debug("[LineScanner] Starting to read lines")
reader := bufio.NewReader(lineReaderPipe)
var appending []byte
for {
line, isPrefix, err := reader.ReadLine()
if err != nil {
if err == io.EOF {
logger.Debug("[LineScanner] Encountered EOF")
break
}
logger.Error("[LineScanner] Failed to read: (%T: %v)", err, err)
}
// If isPrefix is true, that means we've got a really
// long line incoming, and we'll keep appending to it
// until isPrefix is false (which means the long line
// has ended.
if isPrefix && appending == nil {
logger.Debug("[LineScanner] Line is too long to read, going to buffer it until it finishes")
appending = line
continue
}
// Should we be appending?
if appending != nil {
appending = append(appending, line...)
// No more isPrefix! Line is finished!
if !isPrefix {
logger.Debug("[LineScanner] Finished buffering long line")
line = appending
// Reset appending back to nil
appending = nil
} else {
continue
}
}
go p.LineCallback(string(line))
}
logger.Debug("[LineScanner] Finished")
waitGroup.Done()
}()
// Call the StartCallback
go p.StartCallback()
// Wait until the process has finished. The returned error is nil if the command runs,
// has no problems copying stdin, stdout, and stderr, and exits with a zero exit status.
waitResult := p.command.Wait()
// Close the line writer pipe
lineWriterPipe.Close()
// The process is no longer running at this point
p.setRunning(false)
// Find the exit status of the script
p.ExitStatus = getExitStatus(waitResult)
logger.Info("Process with PID: %d finished with Exit Status: %s", p.Pid, p.ExitStatus)
// Sometimes (in docker containers) io.Copy never seems to finish. This is a mega
// hack around it. If it doesn't finish after 1 second, just continue.
logger.Debug("[Process] Waiting for routines to finish")
err = timeoutWait(&waitGroup)
if err != nil {
logger.Debug("[Process] Timed out waiting for wait group: (%T: %v)", err, err)
}
// No error occurred so we can return nil
return nil
}
func (p *Process) Kill() error {
// Send a sigterm
err := p.signal(syscall.SIGTERM)
if err != nil {
return err
}
// Make a channel that we'll use as a timeout
c := make(chan int, 1)
checking := true
// Start a routine that checks to see if the process
// is still alive.
go func() {
for checking {
logger.Debug("[Process] Checking to see if PID: %d is still alive", p.Pid)
foundProcess, err := os.FindProcess(p.Pid)
// Can't find the process at all
if err != nil {
logger.Debug("[Process] Could not find process with PID: %d", p.Pid)
break
}
// We have some information about the process
if foundProcess != nil {
processState, err := foundProcess.Wait()
if err != nil || processState.Exited() {
logger.Debug("[Process] Process with PID: %d has exited.", p.Pid)
break
}
}
// Retry in a moment
sleepTime := time.Duration(1 * time.Second)
time.Sleep(sleepTime)
}
c <- 1
}()
// Timeout this process after 3 seconds
select {
case _ = <-c:
// Was successfully terminated
case <-time.After(10 * time.Second):
// Stop checking in the routine above
checking = false
// Forcefully kill the thing
err = p.signal(syscall.SIGKILL)
if err != nil {
return err
}
}
return nil
}
func (r *AgentPool) Start() error {
// Show the welcome banner and config options used
r.ShowBanner()
// Create the agent registration API Client
r.APIClient = APIClient{Endpoint: r.Endpoint, Token: r.Token}.Create()
// Create the agent template. We use pass this template to the register
// call, at which point we get back a real agent.
template := r.CreateAgentTemplate()
logger.Info("Registering agent with Buildkite...")
// Register the agent
registered, err := r.RegisterAgent(template)
if err != nil {
logger.Fatal("%s", err)
}
logger.Info("Successfully registered agent \"%s\" with meta-data %s", registered.Name, registered.MetaData)
logger.Debug("Ping interval: %ds", registered.PingInterval)
logger.Debug("Heartbeat interval: %ds", registered.HearbeatInterval)
// Now that we have a registereted agent, we can connect it to the API,
// and start running jobs.
worker := AgentWorker{Agent: registered, AgentConfiguration: r.AgentConfiguration, Endpoint: r.Endpoint}.Create()
logger.Info("Connecting to Buildkite...")
if err := worker.Connect(); err != nil {
logger.Fatal("%s", err)
}
logger.Info("Agent successfully connected")
logger.Info("You can press Ctrl-C to stop the agent")
logger.Info("Waiting for work...")
// Start a signalwatcher so we can monitor signals and handle shutdowns
signalwatcher.Watch(func(sig signalwatcher.Signal) {
if sig == signalwatcher.QUIT {
logger.Debug("Received signal `%s`", sig.String())
worker.Stop(false)
} else if sig == signalwatcher.TERM || sig == signalwatcher.INT {
logger.Debug("Received signal `%s`", sig.String())
worker.Stop(true)
} else {
logger.Debug("Ignoring signal `%s`", sig.String())
}
})
// Starts the agent worker. This will block until the agent has
// finished or is stopped.
if err := worker.Start(); err != nil {
logger.Fatal("%s", err)
}
// Now that the agent has stopped, we can disconnect it
logger.Info("Disconnecting %s...", worker.Agent.Name)
worker.Disconnect()
return nil
}
// Read the default file
filename = path.Base(found)
input, err = ioutil.ReadFile(found)
if err != nil {
logger.Fatal("Failed to read file \"%s\" (%s)", found, err)
}
}
if len(input) == 0 {
logger.Fatal("Config file is empty")
}
var parsed []byte
logger.Debug("Parsing pipeline...")
// Parse the pipeline and prepare it for upload
parsed, err = agent.PipelineParser{Data: input}.Parse()
if err != nil {
logger.Fatal("Pipeline parsing of \"%s\" failed (%s)", filename, err)
}
// Create the API client
client := agent.APIClient{
Endpoint: cfg.Endpoint,
Token: cfg.AgentAccessToken,
}.Create()
// Generate a UUID that will identifiy this pipeline change. We
// do this outside of the retry loop because we want this UUID
func (a *ArtifactUploader) upload(artifacts []*api.Artifact) error {
var uploader Uploader
// Determine what uploader to use
if a.Destination != "" {
if strings.HasPrefix(a.Destination, "s3://") {
uploader = new(S3Uploader)
} else {
return errors.New("Unknown upload destination: " + a.Destination)
}
} else {
uploader = new(FormUploader)
}
// Setup the uploader
err := uploader.Setup(a.Destination, a.APIClient.DebugHTTP)
if err != nil {
return err
}
// Set the URL's of the artifacts based on the uploader
for _, artifact := range artifacts {
artifact.URL = uploader.URL(artifact)
}
// Create the artifacts on Buildkite
batchCreator := ArtifactBatchCreator{
APIClient: a.APIClient,
JobID: a.JobID,
Artifacts: artifacts,
UploadDestination: a.Destination,
}
artifacts, err = batchCreator.Create()
if err != nil {
return err
}
// Prepare a concurrency pool to upload the artifacts
p := pool.New(pool.MaxConcurrencyLimit)
errors := []error{}
// Create a wait group so we can make sure the uploader waits for all
// the artifact states to upload before finishing
var stateUploaderWaitGroup sync.WaitGroup
stateUploaderWaitGroup.Add(1)
// A map to keep track of artifact states and how many we've uploaded
artifactsStates := make(map[string]string)
artifactStatesUploaded := 0
// Spin up a gourtine that'll uploading artifact statuses every few
// seconds in batches
go func() {
for artifactStatesUploaded < len(artifacts) {
statesToUpload := make(map[string]string)
// Grab all the states we need to upload, and remove
// them from the tracking map
for id, state := range artifactsStates {
statesToUpload[id] = state
delete(artifactsStates, id)
}
if len(statesToUpload) > 0 {
artifactStatesUploaded += len(statesToUpload)
for id, state := range statesToUpload {
logger.Debug("Artifact `%s` has state `%s`", id, state)
}
// Update the states of the artifacts in bulk.
err = retry.Do(func(s *retry.Stats) error {
_, err = a.APIClient.Artifacts.Update(a.JobID, statesToUpload)
if err != nil {
logger.Warn("%s (%s)", err, s)
}
return err
}, &retry.Config{Maximum: 10, Interval: 1 * time.Second})
if err != nil {
logger.Error("Error uploading artifact states: %s", err)
// Track the error that was raised
p.Lock()
errors = append(errors, err)
p.Unlock()
}
logger.Debug("Uploaded %d artfact states (%d/%d)", len(statesToUpload), artifactStatesUploaded, len(artifacts))
}
// Check again for states to upload in a few seconds
time.Sleep(1 * time.Second)
}
stateUploaderWaitGroup.Done()
}()
for _, artifact := range artifacts {
// Create new instance of the artifact for the goroutine
// See: http://golang.org/doc/effective_go.html#channels
artifact := artifact
p.Spawn(func() {
// Show a nice message that we're starting to upload the file
logger.Info("Uploading \"%s\" %d bytes", artifact.Path, artifact.FileSize)
// Upload the artifact and then set the state depending
// on whether or not it passed. We'll retry the upload
// a couple of times before giving up.
err = retry.Do(func(s *retry.Stats) error {
err := uploader.Upload(artifact)
if err != nil {
logger.Warn("%s (%s)", err, s)
}
return err
}, &retry.Config{Maximum: 10, Interval: 1 * time.Second})
var state string
// Did the upload eventually fail?
if err != nil {
logger.Error("Error uploading artifact \"%s\": %s", artifact.Path, err)
// Track the error that was raised
p.Lock()
errors = append(errors, err)
p.Unlock()
state = "error"
} else {
state = "finished"
}
artifactsStates[artifact.ID] = state
})
}
// Wait for the pool to finish
p.Wait()
// Wait for the statuses to finish uploading
stateUploaderWaitGroup.Wait()
if len(errors) > 0 {
logger.Fatal("There were errors with uploading some of the artifacts")
}
return nil
}