Add draft logr interoperability methods

logr-context/go.mod

@@ -0,0 +1,8 @@
+module github.com/veqryn/slog-context/logr-context
+
+go 1.21
+
+require (
+	github.com/go-logr/logr v1.3.0
+	github.com/veqryn/slog-context v0.3.1-0.20231126110827-74878698ea2b
+)

logr-context/go.sum

@@ -0,0 +1,4 @@
+github.com/go-logr/logr v1.3.0 h1:2y3SDp0ZXuc6/cjLSZ+Q3ir+QB9T/iG5yYRXqsagWSY=
+github.com/go-logr/logr v1.3.0/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/veqryn/slog-context v0.3.1-0.20231126110827-74878698ea2b h1:BG6I67Hp571eSmcc3s8O0XAxSAUg3WHSiWPoMzeV91E=
+github.com/veqryn/slog-context v0.3.1-0.20231126110827-74878698ea2b/go.mod h1:2IEM+uLEBRZyq+CRMdpETc13tUj9aA7zFZnm6/YnvPQ=

logr-context/logr.go

@@ -0,0 +1,48 @@
+package logrcontext
+
+import (
+	"context"
+	"log/slog"
+
+	"github.com/go-logr/logr"
+	"github.com/go-logr/logr/slogr"
+	"github.com/veqryn/slog-context/internal"
+)
+
+func LogrToCtx(parent context.Context, logger logr.Logger) context.Context {
+	if parent == nil {
+		parent = context.Background()
+	}
+	return context.WithValue(parent, internal.CtxKey{}, internal.LoggerCtxVal{
+		Logger: slog.New(slogr.NewSlogHandler(logger)),
+		IterOp: logger,
+	})
+}
+
+func SlogToCtx(parent context.Context, logger *slog.Logger) context.Context {
+	if parent == nil {
+		parent = context.Background()
+	}
+	if logger == nil {
+		return context.WithValue(parent, internal.CtxKey{}, internal.LoggerCtxVal{Logger: logger})
+	}
+	return context.WithValue(parent, internal.CtxKey{}, internal.LoggerCtxVal{
+		Logger: logger,
+		IterOp: slogr.NewLogr(logger.Handler()),
+	})
+}
+
+func LogrFromCtx(ctx context.Context) logr.Logger {
+	if ctx == nil {
+		return slogr.NewLogr(slog.Default().Handler())
+	}
+	if l, ok := ctx.Value(internal.CtxKey{}).(internal.LoggerCtxVal); ok {
+		if lgr, hasLogr := l.IterOp.(logr.Logger); hasLogr {
+			return lgr
+		}
+		if l.Logger != nil {
+			return slogr.NewLogr(l.Logger.Handler())
+		}
+	}
+	return slogr.NewLogr(slog.Default().Handler())
+}