feat(token): add generator for Go types included in schema

internal/cmd/token/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"bytes"
+	"log/slog"
+	"os"
+
+	"github.com/ipld/go-ipld-prime"
+	"github.com/ipld/go-ipld-prime/node/bindnode"
+)
+
+const header = `// Code generated by internal/cmd/token - DO NOT EDIT.
+
+package token
+
+import "github.com/ipld/go-ipld-prime/datamodel"
+
+`
+
+func main() {
+	slog.Info("Generating Go types for token.ipldsch")
+
+	if err := Run(); err != nil {
+		slog.Error(err.Error())
+		slog.Error("Finished but failed to generate and write token_gen.go")
+
+		os.Exit(1)
+	}
+
+	slog.Info("Finished generating and writing token_gen.go")
+	os.Exit(0)
+}
+
+func Run() error {
+	schema, err := os.ReadFile("token.ipldsch")
+	if err != nil {
+		return err
+	}
+
+	slog.Debug(string(schema))
+
+	typeSystem, err := ipld.LoadSchemaBytes(schema)
+	if err != nil {
+		return err
+	}
+
+	buf := bytes.NewBufferString(header)
+
+	if err := bindnode.ProduceGoTypes(buf, typeSystem); err != nil {
+		return err
+	}
+
+	return os.WriteFile("token_gen.go", buf.Bytes(), 0o600)
+}