1 files changed, 38 insertions, 0 deletions
diff --git a/internal/slog/slog.go b/internal/slog/slog.go
new file mode 100644
index 0000000..70d45bb
--- /dev/null
+++ b/internal/slog/slog.go
@@ -0,0 +1,38 @@
+// Package slog is my set of wrappers around package slog.
+package slog
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"sync"
+
+	"golang.org/x/exp/slog"
+)
+
+var (
+	slogLevel = flag.String("slog-level", "INFO", "log level")
+
+	lock sync.Mutex
+
+	// The current slog handler.
+	Handler slog.Handler
+)
+
+func Init() {
+	var programLevel slog.Level
+	if err := (&programLevel).UnmarshalText([]byte(*slogLevel)); err != nil {
+		fmt.Fprintf(os.Stderr, "invalid log level %s: %v, using info\n", *slogLevel, err)
+		programLevel = slog.LevelInfo
+	}
+
+	h := slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{
+		AddSource: true,
+		Level:     programLevel,
+	})
+	slog.SetDefault(slog.New(h))
+
+	lock.Lock()
+	defer lock.Unlock()
+	Handler = h
+}