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report.go
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report.go
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/*
Copyright 2016 The Kubernetes 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 system
import (
"fmt"
"github.com/pkg/errors"
"io"
"os"
)
// ValidationResultType is type of the validation result. Different validation results
// corresponds to different colors.
type ValidationResultType int32
const (
good ValidationResultType = iota
bad
warn
)
// color is the color of the message.
type color int32
const (
red color = 31
green = 32
yellow = 33
white = 37
)
func colorize(s string, c color) string {
return fmt.Sprintf("\033[0;%dm%s\033[0m", c, s)
}
// The default reporter for the system verification test
type StreamReporter struct {
// The stream that this reporter is writing to
WriteStream io.Writer
}
func (dr *StreamReporter) Report(key, value string, resultType ValidationResultType) error {
var c color
switch resultType {
case good:
c = green
case bad:
c = red
case warn:
c = yellow
default:
c = white
}
if dr.WriteStream == nil {
return errors.New("WriteStream has to be defined for this reporter")
}
fmt.Fprintf(dr.WriteStream, "%s: %s\n", colorize(key, white), colorize(value, c))
return nil
}
// DefaultReporter is the default Reporter
var DefaultReporter = &StreamReporter{
WriteStream: os.Stdout,
}