Add simple logging package

Wrapper around github.com/cdr/slog

logger/logger.go

@@ -0,0 +1,87 @@
+package logger
+
+import (
+	"context"
+	"io"
+	"os"
+
+	"github.com/pkg/errors"
+
+	"cdr.dev/slog/sloggers/slogjson"
+
+	"cdr.dev/slog/sloggers/sloghuman"
+
+	"cdr.dev/slog"
+)
+
+type Format string
+
+const (
+	FormatHuman Format = "human"
+	FormatJSON  Format = "json"
+)
+
+var defaultLogger slog.Logger // nolint: gochecknoglobals
+
+type Field = slog.Field
+
+func init() { // nolint: gochecknoinits
+	defaultLogger = Make(FormatHuman, os.Stdout)
+}
+
+func Make(f Format, w io.Writer) slog.Logger {
+	var logger slog.Logger
+
+	switch f {
+	case FormatHuman:
+		logger = sloghuman.Make(w)
+	case FormatJSON:
+		logger = slogjson.Make(w)
+	default:
+		panic(errors.Errorf("unknown logger format '%s'", f))
+	}
+
+	return logger
+}
+
+func Debug(ctx context.Context, msg string, fields ...Field) {
+	slog.Helper()
+	defaultLogger.Debug(ctx, msg, fields...)
+}
+
+func Info(ctx context.Context, msg string, fields ...Field) {
+	slog.Helper()
+	defaultLogger.Info(ctx, msg, fields...)
+}
+
+func Warn(ctx context.Context, msg string, fields ...Field) {
+	slog.Helper()
+	defaultLogger.Warn(ctx, msg, fields...)
+}
+
+func Error(ctx context.Context, msg string, fields ...Field) {
+	slog.Helper()
+	defaultLogger.Error(ctx, msg, fields...)
+}
+
+func Critical(ctx context.Context, msg string, fields ...Field) {
+	slog.Helper()
+	defaultLogger.Critical(ctx, msg, fields...)
+}
+
+func Fatal(ctx context.Context, msg string, fields ...Field) {
+	slog.Helper()
+	defaultLogger.Fatal(ctx, msg, fields...)
+}
+
+func F(name string, value interface{}) Field {
+	return slog.F(name, value)
+}
+
+func SetFormat(f Format) {
+	defaultLogger = Make(f, os.Stdout)
+}
+
+func SetLevel(level slog.Level) {
+	defaultLogger = defaultLogger.Leveled(level)
+}