54 lines
1003 B
Go
54 lines
1003 B
Go
// Logger utilities for the CLI
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//
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// These utilities rely on command line flags to set up the logger, therefore
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// they are tightly coupled with the CLI and should not be used outside.
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package logger
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import (
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"fmt"
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"os"
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"github.com/rs/zerolog"
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"github.com/spf13/viper"
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"golang.org/x/term"
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)
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func New() zerolog.Logger {
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logger := zerolog.
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New(os.Stderr).
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With().
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Timestamp().
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Logger()
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if !jsonLogs() {
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logger = logger.Output(&PlainOutput{Out: os.Stderr})
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} else {
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logger = logger.With().Timestamp().Caller().Logger()
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}
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level := viper.GetString("log-level")
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lvl, err := zerolog.ParseLevel(level)
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if err != nil {
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panic(err)
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}
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return logger.Level(lvl)
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}
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func jsonLogs() bool {
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switch f := viper.GetString("log-format"); f {
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case "json":
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return true
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case "plain":
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return false
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case "tty":
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return false
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case "auto":
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return !term.IsTerminal(int(os.Stdout.Fd()))
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default:
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fmt.Fprintf(os.Stderr, "invalid --log-format %q\n", f)
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os.Exit(1)
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}
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return false
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}
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