151 lines
3.8 KiB
Go
151 lines
3.8 KiB
Go
package logger
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import (
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"fmt"
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"os"
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"strings"
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"time"
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"github.com/alecthomas/units"
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)
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// Option is to encaspulate actions that will be called by Parse and run later to build an Options struct
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type Option func(*Options) error
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// Options is use to set logging configuration data
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type Options struct {
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logFileDirectory string
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maxFileSize units.Base2Bytes
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maxFileCount uint
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terminalOutputDisabled bool
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supportedFileLevels []Level
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supportedTerminalLevels []Level
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}
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// DisableTerminal stops terminal output for the logger
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func DisableTerminal(disable bool) Option {
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return func(c *Options) error {
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c.terminalOutputDisabled = disable
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return nil
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}
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}
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// File sets a custom file to log events
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func File(path string, size units.Base2Bytes, count uint) Option {
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return func(c *Options) error {
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c.logFileDirectory = path
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c.maxFileSize = size
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c.maxFileCount = count
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return nil
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}
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}
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// DefaultFile configures the log options will the defaults
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func DefaultFile(directoryPath string) Option {
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return func(c *Options) error {
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size, err := units.ParseBase2Bytes("1MB")
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if err != nil {
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return err
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}
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c.logFileDirectory = directoryPath
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c.maxFileSize = size
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c.maxFileCount = 5
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return nil
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}
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}
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// SupportedFileLevels sets the supported logging levels for the log file
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func SupportedFileLevels(supported []Level) Option {
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return func(c *Options) error {
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c.supportedFileLevels = supported
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return nil
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}
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}
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// SupportedTerminalevels sets the supported logging levels for the terminal output
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func SupportedTerminalevels(supported []Level) Option {
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return func(c *Options) error {
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c.supportedTerminalLevels = supported
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return nil
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}
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}
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// LogLevelString sets the supported logging levels from a command line flag
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func LogLevelString(level string) Option {
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return func(c *Options) error {
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supported, err := ParseLevelString(level)
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if err != nil {
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return err
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}
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c.supportedFileLevels = supported
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c.supportedTerminalLevels = supported
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return nil
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}
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}
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// Parse builds the Options struct so the caller knows what actions should be run
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func Parse(opts ...Option) (*Options, error) {
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options := &Options{}
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for _, opt := range opts {
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if err := opt(options); err != nil {
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return nil, err
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}
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}
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return options, nil
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}
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// New setups a new logger based on the options.
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// The default behavior is to write to standard out
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func New(opts ...Option) (Service, error) {
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config, err := Parse(opts...)
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if err != nil {
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return nil, err
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}
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l := NewOutputWriter(SharedWriteManager)
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if config.logFileDirectory != "" {
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l.Add(NewFileRollingWriter(config.logFileDirectory,
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"cloudflared",
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int64(config.maxFileSize),
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config.maxFileCount),
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NewDefaultFormatter(time.RFC3339Nano), config.supportedFileLevels...)
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}
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if !config.terminalOutputDisabled {
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if len(config.supportedTerminalLevels) == 0 {
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l.Add(os.Stdout, NewTerminalFormatter(""), InfoLevel)
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l.Add(os.Stderr, NewTerminalFormatter(""), ErrorLevel, FatalLevel)
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} else {
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errLevels := []Level{}
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outLevels := []Level{}
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for _, level := range config.supportedTerminalLevels {
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if level == ErrorLevel || level == FatalLevel {
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errLevels = append(errLevels, level)
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} else {
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outLevels = append(outLevels, level)
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}
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}
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l.Add(os.Stdout, NewTerminalFormatter(""), outLevels...)
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l.Add(os.Stderr, NewTerminalFormatter(""), errLevels...)
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}
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}
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return l, nil
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}
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// ParseLevelString returns the expected log levels based on the cmd flag
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func ParseLevelString(lvl string) ([]Level, error) {
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switch strings.ToLower(lvl) {
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case "fatal":
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return []Level{FatalLevel}, nil
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case "error":
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return []Level{FatalLevel, ErrorLevel}, nil
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case "info":
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return []Level{FatalLevel, ErrorLevel, InfoLevel}, nil
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case "debug":
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return []Level{FatalLevel, ErrorLevel, InfoLevel, DebugLevel}, nil
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}
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return []Level{}, fmt.Errorf("not a valid log level: %q", lvl)
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}
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