56 lines
1.3 KiB
Go
56 lines
1.3 KiB
Go
// Package log configures structured logging (slog) to a rotating file
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// with a console mirror. Separate log files are used for the GUI and
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// the privileged daemon.
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package log
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import (
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"io"
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"log/slog"
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"os"
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"path/filepath"
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"gopkg.in/natefinch/lumberjack.v2"
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)
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// Role selects which log file to write to.
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type Role string
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const (
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RoleGUI Role = "gui"
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RoleDaemon Role = "daemon"
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)
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var logger *slog.Logger
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// Init configures the package-level logger writing to the given file
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// path (rotated by size) and to stderr.
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func Init(role Role, logFile string) *slog.Logger {
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if err := os.MkdirAll(filepath.Dir(logFile), 0o755); err != nil {
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// Fall back to stderr-only on failure.
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logger = slog.New(slog.NewTextHandler(os.Stderr, nil))
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return logger
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}
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w := &lumberjack.Logger{
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Filename: logFile,
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MaxSize: 10, // MB
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MaxBackups: 3,
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MaxAge: 30, // days
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LocalTime: true,
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}
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mw := io.MultiWriter(os.Stderr, w)
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logger = slog.New(slog.NewTextHandler(mw, &slog.HandlerOptions{
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Level: slog.LevelInfo,
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}))
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slog.SetDefault(logger)
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return logger
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}
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// L returns the package-level logger. It returns a default logger if
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// Init was not called.
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func L() *slog.Logger {
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if logger == nil {
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logger = slog.New(slog.NewTextHandler(os.Stderr, nil))
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}
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return logger
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}
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