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delegate_factory.go
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delegate_factory.go
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package builder
import (
"encoding/json"
"io"
"strings"
"time"
"unicode/utf8"
"code.cloudfoundry.org/clock"
"code.cloudfoundry.org/lager"
"github.com/chenbh/concourse/v6/atc"
"github.com/chenbh/concourse/v6/atc/db"
"github.com/chenbh/concourse/v6/atc/event"
"github.com/chenbh/concourse/v6/atc/exec"
"github.com/chenbh/concourse/v6/atc/runtime"
"github.com/chenbh/concourse/v6/vars"
)
func NewDelegateFactory() *delegateFactory {
return &delegateFactory{}
}
type delegateFactory struct{}
func (delegate *delegateFactory) GetDelegate(build db.Build, planID atc.PlanID, credVarsTracker vars.CredVarsTracker) exec.GetDelegate {
return NewGetDelegate(build, planID, credVarsTracker, clock.NewClock())
}
func (delegate *delegateFactory) PutDelegate(build db.Build, planID atc.PlanID, credVarsTracker vars.CredVarsTracker) exec.PutDelegate {
return NewPutDelegate(build, planID, credVarsTracker, clock.NewClock())
}
func (delegate *delegateFactory) TaskDelegate(build db.Build, planID atc.PlanID, credVarsTracker vars.CredVarsTracker) exec.TaskDelegate {
return NewTaskDelegate(build, planID, credVarsTracker, clock.NewClock())
}
func (delegate *delegateFactory) CheckDelegate(check db.Check, planID atc.PlanID, credVarsTracker vars.CredVarsTracker) exec.CheckDelegate {
return NewCheckDelegate(check, planID, credVarsTracker, clock.NewClock())
}
func (delegate *delegateFactory) BuildStepDelegate(build db.Build, planID atc.PlanID, credVarsTracker vars.CredVarsTracker) exec.BuildStepDelegate {
return NewBuildStepDelegate(build, planID, credVarsTracker, clock.NewClock())
}
func NewGetDelegate(build db.Build, planID atc.PlanID, credVarsTracker vars.CredVarsTracker, clock clock.Clock) exec.GetDelegate {
return &getDelegate{
BuildStepDelegate: NewBuildStepDelegate(build, planID, credVarsTracker, clock),
eventOrigin: event.Origin{ID: event.OriginID(planID)},
build: build,
clock: clock,
}
}
type getDelegate struct {
exec.BuildStepDelegate
build db.Build
eventOrigin event.Origin
clock clock.Clock
}
func (d *getDelegate) Initializing(logger lager.Logger) {
err := d.build.SaveEvent(event.InitializeGet{
Origin: d.eventOrigin,
Time: time.Now().Unix(),
})
if err != nil {
logger.Error("failed-to-save-initialize-get-event", err)
return
}
logger.Info("initializing")
}
func (d *getDelegate) Starting(logger lager.Logger) {
err := d.build.SaveEvent(event.StartGet{
Time: time.Now().Unix(),
Origin: d.eventOrigin,
})
if err != nil {
logger.Error("failed-to-save-start-get-event", err)
return
}
logger.Info("starting")
}
func (d *getDelegate) Finished(logger lager.Logger, exitStatus exec.ExitStatus, info runtime.VersionResult) {
// PR#4398: close to flush stdout and stderr
d.Stdout().(io.Closer).Close()
d.Stderr().(io.Closer).Close()
err := d.build.SaveEvent(event.FinishGet{
Origin: d.eventOrigin,
Time: d.clock.Now().Unix(),
ExitStatus: int(exitStatus),
FetchedVersion: info.Version,
FetchedMetadata: info.Metadata,
})
if err != nil {
logger.Error("failed-to-save-finish-get-event", err)
return
}
logger.Info("finished", lager.Data{"exit-status": exitStatus})
}
func (d *getDelegate) UpdateVersion(log lager.Logger, plan atc.GetPlan, info runtime.VersionResult) {
logger := log.WithData(lager.Data{
"pipeline-name": d.build.PipelineName(),
"pipeline-id": d.build.PipelineID()},
)
pipeline, found, err := d.build.Pipeline()
if err != nil {
logger.Error("failed-to-find-pipeline", err)
return
}
if !found {
logger.Debug("pipeline-not-found")
return
}
resource, found, err := pipeline.Resource(plan.Resource)
if err != nil {
logger.Error("failed-to-find-resource", err)
return
}
if !found {
logger.Debug("resource-not-found")
return
}
_, err = resource.UpdateMetadata(
info.Version,
db.NewResourceConfigMetadataFields(info.Metadata),
)
if err != nil {
logger.Error("failed-to-save-resource-config-version-metadata", err)
return
}
}
func NewPutDelegate(build db.Build, planID atc.PlanID, credVarsTracker vars.CredVarsTracker, clock clock.Clock) exec.PutDelegate {
return &putDelegate{
BuildStepDelegate: NewBuildStepDelegate(build, planID, credVarsTracker, clock),
eventOrigin: event.Origin{ID: event.OriginID(planID)},
build: build,
clock: clock,
}
}
type putDelegate struct {
exec.BuildStepDelegate
build db.Build
eventOrigin event.Origin
clock clock.Clock
}
func (d *putDelegate) Initializing(logger lager.Logger) {
err := d.build.SaveEvent(event.InitializePut{
Origin: d.eventOrigin,
Time: time.Now().Unix(),
})
if err != nil {
logger.Error("failed-to-save-initialize-put-event", err)
return
}
logger.Info("initializing")
}
func (d *putDelegate) Starting(logger lager.Logger) {
err := d.build.SaveEvent(event.StartPut{
Time: time.Now().Unix(),
Origin: d.eventOrigin,
})
if err != nil {
logger.Error("failed-to-save-start-put-event", err)
return
}
logger.Info("starting")
}
func (d *putDelegate) Finished(logger lager.Logger, exitStatus exec.ExitStatus, info runtime.VersionResult) {
// PR#4398: close to flush stdout and stderr
d.Stdout().(io.Closer).Close()
d.Stderr().(io.Closer).Close()
err := d.build.SaveEvent(event.FinishPut{
Origin: d.eventOrigin,
Time: d.clock.Now().Unix(),
ExitStatus: int(exitStatus),
CreatedVersion: info.Version,
CreatedMetadata: info.Metadata,
})
if err != nil {
logger.Error("failed-to-save-finish-put-event", err)
return
}
logger.Info("finished", lager.Data{"exit-status": exitStatus, "version-info": info})
}
func (d *putDelegate) SaveOutput(log lager.Logger, plan atc.PutPlan, source atc.Source, resourceTypes atc.VersionedResourceTypes, info runtime.VersionResult) {
logger := log.WithData(lager.Data{
"step": plan.Name,
"resource": plan.Resource,
"resource-type": plan.Type,
"version": info.Version,
})
err := d.build.SaveOutput(
plan.Type,
source,
resourceTypes,
info.Version,
db.NewResourceConfigMetadataFields(info.Metadata),
plan.Name,
plan.Resource,
)
if err != nil {
logger.Error("failed-to-save-output", err)
return
}
}
func NewTaskDelegate(build db.Build, planID atc.PlanID, credVarsTracker vars.CredVarsTracker, clock clock.Clock) exec.TaskDelegate {
return &taskDelegate{
BuildStepDelegate: NewBuildStepDelegate(build, planID, credVarsTracker, clock),
eventOrigin: event.Origin{ID: event.OriginID(planID)},
build: build,
}
}
type taskDelegate struct {
exec.BuildStepDelegate
config atc.TaskConfig
build db.Build
eventOrigin event.Origin
}
func (d *taskDelegate) SetTaskConfig(config atc.TaskConfig) {
d.config = config
}
func (d *taskDelegate) Initializing(logger lager.Logger) {
err := d.build.SaveEvent(event.InitializeTask{
Origin: d.eventOrigin,
Time: time.Now().Unix(),
TaskConfig: event.ShadowTaskConfig(d.config),
})
if err != nil {
logger.Error("failed-to-save-initialize-task-event", err)
return
}
logger.Info("initializing")
}
func (d *taskDelegate) Starting(logger lager.Logger) {
err := d.build.SaveEvent(event.StartTask{
Origin: d.eventOrigin,
Time: time.Now().Unix(),
TaskConfig: event.ShadowTaskConfig(d.config),
})
if err != nil {
logger.Error("failed-to-save-initialize-task-event", err)
return
}
logger.Debug("starting")
}
func (d *taskDelegate) Finished(logger lager.Logger, exitStatus exec.ExitStatus) {
// PR#4398: close to flush stdout and stderr
d.Stdout().(io.Closer).Close()
d.Stderr().(io.Closer).Close()
err := d.build.SaveEvent(event.FinishTask{
ExitStatus: int(exitStatus),
Time: time.Now().Unix(),
Origin: d.eventOrigin,
})
if err != nil {
logger.Error("failed-to-save-finish-event", err)
return
}
logger.Info("finished", lager.Data{"exit-status": exitStatus})
}
func NewCheckDelegate(check db.Check, planID atc.PlanID, credVarsTracker vars.CredVarsTracker, clock clock.Clock) exec.CheckDelegate {
return &checkDelegate{
BuildStepDelegate: NewBuildStepDelegate(nil, planID, credVarsTracker, clock),
eventOrigin: event.Origin{ID: event.OriginID(planID)},
check: check,
clock: clock,
}
}
type checkDelegate struct {
exec.BuildStepDelegate
check db.Check
eventOrigin event.Origin
clock clock.Clock
}
func (d *checkDelegate) SaveVersions(spanContext db.SpanContext, versions []atc.Version) error {
return d.check.SaveVersions(spanContext, versions)
}
type discardCloser struct {
}
func (d discardCloser) Write(p []byte) (int, error) {
return len(p), nil
}
func (d discardCloser) Close() error {
return nil
}
func (*checkDelegate) Stdout() io.Writer { return discardCloser{} }
func (*checkDelegate) Stderr() io.Writer { return discardCloser{} }
func (*checkDelegate) ImageVersionDetermined(db.UsedResourceCache) error { return nil }
func (*checkDelegate) Errored(lager.Logger, string) { return }
func NewBuildStepDelegate(
build db.Build,
planID atc.PlanID,
credVarsTracker vars.CredVarsTracker,
clock clock.Clock,
) *buildStepDelegate {
return &buildStepDelegate{
build: build,
planID: planID,
clock: clock,
credVarsTracker: credVarsTracker,
stdout: nil,
stderr: nil,
}
}
type buildStepDelegate struct {
build db.Build
planID atc.PlanID
clock clock.Clock
credVarsTracker vars.CredVarsTracker
stderr io.Writer
stdout io.Writer
}
func (delegate *buildStepDelegate) Variables() vars.CredVarsTracker {
return delegate.credVarsTracker
}
func (delegate *buildStepDelegate) ImageVersionDetermined(resourceCache db.UsedResourceCache) error {
return delegate.build.SaveImageResourceVersion(resourceCache)
}
type credVarsIterator struct {
line string
}
func (it *credVarsIterator) YieldCred(name, value string) {
for _, lineValue := range strings.Split(value, "\n") {
lineValue = strings.TrimSpace(lineValue)
// Don't consider a single char as a secret.
if len(lineValue) > 1 {
it.line = strings.Replace(it.line, lineValue, "((redacted))", -1)
}
}
}
func (delegate *buildStepDelegate) buildOutputFilter(str string) string {
it := &credVarsIterator{line: str}
delegate.credVarsTracker.IterateInterpolatedCreds(it)
return it.line
}
func (delegate *buildStepDelegate) RedactImageSource(source atc.Source) (atc.Source, error) {
b, err := json.Marshal(&source)
if err != nil {
return source, err
}
s := delegate.buildOutputFilter(string(b))
newSource := atc.Source{}
err = json.Unmarshal([]byte(s), &newSource)
if err != nil {
return source, err
}
return newSource, nil
}
func (delegate *buildStepDelegate) Stdout() io.Writer {
if delegate.stdout == nil {
if delegate.credVarsTracker.Enabled() {
delegate.stdout = newDBEventWriterWithSecretRedaction(
delegate.build,
event.Origin{
Source: event.OriginSourceStdout,
ID: event.OriginID(delegate.planID),
},
delegate.clock,
delegate.buildOutputFilter,
)
} else {
delegate.stdout = newDBEventWriter(
delegate.build,
event.Origin{
Source: event.OriginSourceStdout,
ID: event.OriginID(delegate.planID),
},
delegate.clock,
)
}
}
return delegate.stdout
}
func (delegate *buildStepDelegate) Stderr() io.Writer {
if delegate.stderr == nil {
if delegate.credVarsTracker.Enabled() {
delegate.stderr = newDBEventWriterWithSecretRedaction(
delegate.build,
event.Origin{
Source: event.OriginSourceStderr,
ID: event.OriginID(delegate.planID),
},
delegate.clock,
delegate.buildOutputFilter,
)
} else {
delegate.stderr = newDBEventWriter(
delegate.build,
event.Origin{
Source: event.OriginSourceStderr,
ID: event.OriginID(delegate.planID),
},
delegate.clock,
)
}
}
return delegate.stderr
}
func (delegate *buildStepDelegate) Initializing(logger lager.Logger) {
err := delegate.build.SaveEvent(event.Initialize{
Origin: event.Origin{
ID: event.OriginID(delegate.planID),
},
Time: time.Now().Unix(),
})
if err != nil {
logger.Error("failed-to-save-initialize-event", err)
return
}
logger.Info("initializing")
}
func (delegate *buildStepDelegate) Starting(logger lager.Logger) {
err := delegate.build.SaveEvent(event.Start{
Origin: event.Origin{
ID: event.OriginID(delegate.planID),
},
Time: time.Now().Unix(),
})
if err != nil {
logger.Error("failed-to-save-start-event", err)
return
}
logger.Debug("starting")
}
func (delegate *buildStepDelegate) Finished(logger lager.Logger, succeeded bool) {
// PR#4398: close to flush stdout and stderr
delegate.Stdout().(io.Closer).Close()
delegate.Stderr().(io.Closer).Close()
err := delegate.build.SaveEvent(event.Finish{
Origin: event.Origin{
ID: event.OriginID(delegate.planID),
},
Time: time.Now().Unix(),
Succeeded: succeeded,
})
if err != nil {
logger.Error("failed-to-save-finish-event", err)
return
}
logger.Info("finished")
}
func (delegate *buildStepDelegate) SelectedWorker(logger lager.Logger, workerName string) {
err := delegate.build.SaveEvent(event.SelectedWorker{
Time: time.Now().Unix(),
Origin: event.Origin{
ID: event.OriginID(delegate.planID),
},
WorkerName: workerName,
})
if err != nil {
logger.Error("failed-to-save-selected-worker-event", err)
return
}
}
func (delegate *buildStepDelegate) Errored(logger lager.Logger, message string) {
err := delegate.build.SaveEvent(event.Error{
Message: message,
Origin: event.Origin{
ID: event.OriginID(delegate.planID),
},
Time: delegate.clock.Now().Unix(),
})
if err != nil {
logger.Error("failed-to-save-error-event", err)
}
}
func newDBEventWriter(build db.Build, origin event.Origin, clock clock.Clock) io.WriteCloser {
return &dbEventWriter{
build: build,
origin: origin,
clock: clock,
}
}
type dbEventWriter struct {
build db.Build
origin event.Origin
clock clock.Clock
dangling []byte
}
func (writer *dbEventWriter) Write(data []byte) (int, error) {
text := writer.writeDangling(data)
if text == nil {
return len(data), nil
}
err := writer.saveLog(string(text))
if err != nil {
return 0, err
}
return len(data), nil
}
func (writer *dbEventWriter) writeDangling(data []byte) []byte {
text := append(writer.dangling, data...)
checkEncoding, _ := utf8.DecodeLastRune(text)
if checkEncoding == utf8.RuneError {
writer.dangling = text
return nil
}
writer.dangling = nil
return text
}
func (writer *dbEventWriter) saveLog(text string) error {
return writer.build.SaveEvent(event.Log{
Time: writer.clock.Now().Unix(),
Payload: text,
Origin: writer.origin,
})
}
func (writer *dbEventWriter) Close() error {
return nil
}
func newDBEventWriterWithSecretRedaction(build db.Build, origin event.Origin, clock clock.Clock, filter exec.BuildOutputFilter) io.Writer {
return &dbEventWriterWithSecretRedaction{
dbEventWriter: dbEventWriter{
build: build,
origin: origin,
clock: clock,
},
filter: filter,
}
}
type dbEventWriterWithSecretRedaction struct {
dbEventWriter
filter exec.BuildOutputFilter
}
func (writer *dbEventWriterWithSecretRedaction) Write(data []byte) (int, error) {
var text []byte
if data != nil {
text = writer.writeDangling(data)
if text == nil {
return len(data), nil
}
} else {
if writer.dangling == nil || len(writer.dangling) == 0 {
return 0, nil
}
text = writer.dangling
}
payload := string(text)
if data != nil {
idx := strings.LastIndex(payload, "\n")
if idx >= 0 && idx < len(payload) {
// Cache content after the last new-line, and proceed contents
// before the last new-line.
writer.dangling = ([]byte)(payload[idx+1:])
payload = payload[:idx+1]
} else {
// No new-line found, then cache the log.
writer.dangling = text
return len(data), nil
}
}
payload = writer.filter(payload)
err := writer.saveLog(payload)
if err != nil {
return 0, err
}
return len(data), nil
}
func (writer *dbEventWriterWithSecretRedaction) Close() error {
writer.Write(nil)
return nil
}