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|
package log
import (
"fmt"
"os"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
const (
FormatRunner = "runner"
FormatText = "text"
FormatJSON = "json"
)
var (
configuration = NewConfig(logrus.StandardLogger())
logFlags = []cli.Flag{
cli.BoolFlag{
Name: "debug",
Usage: "debug mode",
EnvVar: "DEBUG",
},
cli.StringFlag{
Name: "log-format",
Usage: "Choose log format (options: runner, text, json)",
EnvVar: "LOG_FORMAT",
},
cli.StringFlag{
Name: "log-level, l",
Usage: "Log level (options: debug, info, warn, error, fatal, panic)",
EnvVar: "LOG_LEVEL",
},
}
formats = map[string]logrus.Formatter{
FormatRunner: new(RunnerTextFormatter),
FormatText: new(logrus.TextFormatter),
FormatJSON: new(logrus.JSONFormatter),
}
)
func formatNames() []string {
formatNames := make([]string, 0)
for name := range formats {
formatNames = append(formatNames, name)
}
return formatNames
}
type Config struct {
logger *logrus.Logger
level logrus.Level
format logrus.Formatter
levelSetWithCli bool
formatSetWithCli bool
goroutinesDumpStopCh chan bool
}
func (l *Config) IsLevelSetWithCli() bool {
return l.levelSetWithCli
}
func (l *Config) IsFormatSetWithCli() bool {
return l.formatSetWithCli
}
func (l *Config) handleCliCtx(cliCtx *cli.Context) error {
if cliCtx.IsSet("log-level") || cliCtx.IsSet("l") {
err := l.SetLevel(cliCtx.String("log-level"))
if err != nil {
return err
}
l.levelSetWithCli = true
}
if cliCtx.Bool("debug") {
l.level = logrus.DebugLevel
l.levelSetWithCli = true
}
if cliCtx.IsSet("log-format") {
err := l.SetFormat(cliCtx.String("log-format"))
if err != nil {
return err
}
l.formatSetWithCli = true
}
l.ReloadConfiguration()
return nil
}
func (l *Config) SetLevel(levelString string) error {
level, err := logrus.ParseLevel(levelString)
if err != nil {
return fmt.Errorf("failed to parse log level: %w", err)
}
l.level = level
return nil
}
func (l *Config) SetFormat(format string) error {
formatter, ok := formats[format]
if !ok {
return fmt.Errorf("unknown log format %q, expected one of: %v", l.format, formatNames())
}
l.format = formatter
return nil
}
func (l *Config) ReloadConfiguration() {
l.logger.SetFormatter(l.format)
l.logger.SetLevel(l.level)
if l.level == logrus.DebugLevel {
l.enableGoroutinesDump()
} else {
l.disableGoroutinesDump()
}
}
func (l *Config) enableGoroutinesDump() {
if l.goroutinesDumpStopCh != nil {
return
}
l.goroutinesDumpStopCh = make(chan bool)
watchForGoroutinesDump(l.logger, l.goroutinesDumpStopCh)
}
func (l *Config) disableGoroutinesDump() {
if l.goroutinesDumpStopCh == nil {
return
}
close(l.goroutinesDumpStopCh)
l.goroutinesDumpStopCh = nil
}
func NewConfig(logger *logrus.Logger) *Config {
return &Config{
logger: logger,
level: logrus.InfoLevel,
format: new(RunnerTextFormatter),
}
}
func Configuration() *Config {
return configuration
}
func ConfigureLogging(app *cli.App) {
app.Flags = append(app.Flags, logFlags...)
appBefore := app.Before
app.Before = func(cliCtx *cli.Context) error {
Configuration().logger.SetOutput(os.Stderr)
err := Configuration().handleCliCtx(cliCtx)
if err != nil {
logrus.WithError(err).Fatal("Error while setting up logging configuration")
}
if appBefore != nil {
return appBefore(cliCtx)
}
return nil
}
}
|
