sneak
ce6db7627d
- Add blank lines before return statements (nlreturn) - Remove unused metaCacheMu field and sync import (unused) - Rename unused groups parameter to _ (revive) - Use StorageFilePerm constant instead of magic 0600 (mnd, gosec) - Add nolint directive for vipsOnce global (gochecknoglobals)
94 lines
2.0 KiB
Go
94 lines
2.0 KiB
Go
// Package logger provides structured logging using slog.
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package logger
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import (
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"fmt"
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"log/slog"
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"os"
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"path/filepath"
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"runtime"
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"go.uber.org/fx"
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"sneak.berlin/go/pixa/internal/globals"
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)
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// Params defines dependencies for Logger.
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type Params struct {
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fx.In
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Globals *globals.Globals
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}
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// Logger wraps slog with application-specific functionality.
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type Logger struct {
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log *slog.Logger
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level *slog.LevelVar
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globals *globals.Globals
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}
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// New creates a new Logger instance.
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func New(_ fx.Lifecycle, params Params) (*Logger, error) {
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l := &Logger{
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level: new(slog.LevelVar),
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globals: params.Globals,
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}
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l.level.Set(slog.LevelInfo)
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// TTY detection for dev vs prod output
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tty := false
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if fileInfo, _ := os.Stdout.Stat(); (fileInfo.Mode() & os.ModeCharDevice) != 0 {
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tty = true
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}
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// replaceAttr simplifies the source attribute to "file.go:line"
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replaceAttr := func(_ []string, a slog.Attr) slog.Attr {
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if a.Key == slog.SourceKey {
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if src, ok := a.Value.Any().(*slog.Source); ok {
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a.Value = slog.StringValue(fmt.Sprintf("%s:%d", filepath.Base(src.File), src.Line))
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}
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}
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return a
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}
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var handler slog.Handler
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if tty {
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// Text output for development
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handler = slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
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Level: l.level,
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AddSource: true,
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ReplaceAttr: replaceAttr,
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})
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} else {
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// JSON output for production
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handler = slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
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Level: l.level,
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AddSource: true,
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ReplaceAttr: replaceAttr,
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})
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}
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l.log = slog.New(handler)
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return l, nil
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}
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// EnableDebugLogging sets the log level to debug.
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func (l *Logger) EnableDebugLogging() {
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l.level.Set(slog.LevelDebug)
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l.log.Debug("debug logging enabled", "debug", true)
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}
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// Get returns the underlying slog.Logger.
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func (l *Logger) Get() *slog.Logger {
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return l.log
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}
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// Identify logs application startup information.
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func (l *Logger) Identify() {
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l.log.Info("starting",
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"appname", l.globals.Appname,
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"version", l.globals.Version,
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"arch", runtime.GOARCH,
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)
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}
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