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formatter.go
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formatter.go
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/*
Copyright 2021 The Skaffold Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package logger
import (
"fmt"
"io"
"sync"
v1 "k8s.io/api/core/v1"
eventV2 "github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/event/v2"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/log"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/output"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/schema/latest"
tagutil "github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/tag/util"
)
type Formatter func(pod v1.Pod, containerStatus v1.ContainerStatus, isMuted func() bool) log.Formatter
type kubernetesLogFormatter struct {
colorPicker output.ColorPicker
prefix string
JSONParseConfig latest.JSONParseConfig
kubeContext string
pod *v1.Pod
container v1.ContainerStatus
lock sync.Mutex
isMuted func() bool
}
func newKubernetesLogFormatter(config Config, colorPicker output.ColorPicker, isMuted func() bool, kubeContext string, pod *v1.Pod, container v1.ContainerStatus) *kubernetesLogFormatter {
return &kubernetesLogFormatter{
colorPicker: colorPicker,
prefix: clusterPrefix(config, kubeContext, pod, container),
JSONParseConfig: config.JSONParseConfig(),
kubeContext: kubeContext,
pod: pod,
container: container,
isMuted: isMuted,
}
}
func (k *kubernetesLogFormatter) Name() string { return k.prefix }
func (k *kubernetesLogFormatter) PrintLine(out io.Writer, line string) {
if k.isMuted() {
return
}
formattedPrefix := k.prefix
if output.IsColorable(out) {
formattedPrefix = k.color().Sprintf("%s", k.prefix)
// if our original prefix was empty, don't prepend a space to the line,
// but keep the color prefix we just added.
if k.prefix != "" {
formattedPrefix = fmt.Sprintf("%s ", formattedPrefix)
}
}
line = log.ParseJSON(k.JSONParseConfig, line)
formattedLine := fmt.Sprintf("%s%s", formattedPrefix, line)
eventV2.ApplicationLog(k.pod.Name, k.container.Name, formattedPrefix, line, formattedLine)
k.lock.Lock()
defer k.lock.Unlock()
fmt.Fprint(out, formattedLine)
}
func (k *kubernetesLogFormatter) color() output.Color {
for _, container := range k.pod.Spec.Containers {
if c := k.colorPicker.Pick(container.Image); c != output.None {
return c
}
}
// If no mapping is found, don't add any color formatting
return output.None
}
func clusterPrefix(config Config, kubeContext string, pod *v1.Pod, container v1.ContainerStatus) string {
if config.IsMultiCluster() {
return fmt.Sprintf("[%s]%s", kubeContext, prefix(config, pod, container))
}
return prefix(config, pod, container)
}
func prefix(config Config, pod *v1.Pod, container v1.ContainerStatus) string {
var c latest.Pipeline
var present bool
for _, container := range pod.Spec.Containers {
if c, present = config.PipelineForImage(tagutil.StripTag(container.Image, false)); present {
break
}
}
if !present {
c = config.DefaultPipeline()
}
switch c.Deploy.Logs.Prefix {
case "auto":
if pod.Name != container.Name {
return podAndContainerPrefix(pod, container)
}
return autoPrefix(pod, container)
case "container":
return containerPrefix(container)
case "podAndContainer":
return podAndContainerPrefix(pod, container)
case "none":
return ""
default:
panic("unsupported prefix: " + c.Deploy.Logs.Prefix)
}
}
func autoPrefix(pod *v1.Pod, container v1.ContainerStatus) string {
if pod.Name != container.Name {
return fmt.Sprintf("[%s %s]", pod.Name, container.Name)
}
return fmt.Sprintf("[%s]", container.Name)
}
func containerPrefix(container v1.ContainerStatus) string {
return fmt.Sprintf("[%s]", container.Name)
}
func podAndContainerPrefix(pod *v1.Pod, container v1.ContainerStatus) string {
return fmt.Sprintf("[%s %s]", pod.Name, container.Name)
}