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docker_logger.go
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/
docker_logger.go
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package container
import (
"bufio"
"encoding/json"
"errors"
"io"
"github.com/sirupsen/logrus"
)
type dockerMessage struct {
ID string `json:"id"`
Stream string `json:"stream"`
Error string `json:"error"`
ErrorDetail struct {
Message string
}
Status string `json:"status"`
Progress string `json:"progress"`
}
const logPrefix = " \U0001F433 "
/*
func logDockerOutput(ctx context.Context, dockerResponse io.Reader) {
logger := common.Logger(ctx)
if entry, ok := logger.(*logrus.Entry); ok {
w := entry.Writer()
_, err := stdcopy.StdCopy(w, w, dockerResponse)
if err != nil {
logrus.Error(err)
}
} else if lgr, ok := logger.(*logrus.Logger); ok {
w := lgr.Writer()
_, err := stdcopy.StdCopy(w, w, dockerResponse)
if err != nil {
logrus.Error(err)
}
} else {
logrus.Errorf("Unable to get writer from logger (type=%T)", logger)
}
}
*/
/*
func streamDockerOutput(ctx context.Context, dockerResponse io.Reader) {
/*
out := os.Stdout
go func() {
<-ctx.Done()
//fmt.Println()
}()
_, err := io.Copy(out, dockerResponse)
if err != nil {
logrus.Error(err)
}
* /
logger := common.Logger(ctx)
reader := bufio.NewReader(dockerResponse)
for {
if ctx.Err() != nil {
break
}
line, _, err := reader.ReadLine()
if err == io.EOF {
break
}
logger.Debugf("%s\n", line)
}
}
*/
func logDockerResponse(logger logrus.FieldLogger, dockerResponse io.ReadCloser, isError bool) error {
if dockerResponse == nil {
return nil
}
defer dockerResponse.Close()
scanner := bufio.NewScanner(dockerResponse)
msg := dockerMessage{}
for scanner.Scan() {
line := scanner.Bytes()
msg.ID = ""
msg.Stream = ""
msg.Error = ""
msg.ErrorDetail.Message = ""
msg.Status = ""
msg.Progress = ""
if err := json.Unmarshal(line, &msg); err != nil {
writeLog(logger, false, "Unable to unmarshal line [%s] ==> %v", string(line), err)
continue
}
if msg.Error != "" {
writeLog(logger, isError, "%s", msg.Error)
return errors.New(msg.Error)
}
if msg.ErrorDetail.Message != "" {
writeLog(logger, isError, "%s", msg.ErrorDetail.Message)
return errors.New(msg.Error)
}
if msg.Status != "" {
if msg.Progress != "" {
writeLog(logger, isError, "%s :: %s :: %s\n", msg.Status, msg.ID, msg.Progress)
} else {
writeLog(logger, isError, "%s :: %s\n", msg.Status, msg.ID)
}
} else if msg.Stream != "" {
writeLog(logger, isError, msg.Stream)
} else {
writeLog(logger, false, "Unable to handle line: %s", string(line))
}
}
return nil
}
func writeLog(logger logrus.FieldLogger, isError bool, format string, args ...interface{}) {
if isError {
logger.Errorf(format, args...)
} else {
logger.Debugf(format, args...)
}
}