Generating conversion methods.

cmd/kube-conversion/conversion.go

@@ -0,0 +1,71 @@
+/*
+Copyright 2015 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"io"
+	"os"
+	"runtime"
+	"strings"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/api/v1beta1"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/api/v1beta2"
+	_ "github.com/GoogleCloudPlatform/kubernetes/pkg/api/v1beta3"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/conversion"
+
+	"github.com/golang/glog"
+	flag "github.com/spf13/pflag"
+)
+
+var (
+	outputDest = flag.StringP("output", "o", "-", "Output destination; '-' means stdout")
+	versions   = flag.StringP("versions", "v", "v1beta3", "Comma separated list of versions for conversion.")
+)
+
+func main() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+	flag.Parse()
+
+	var out io.Writer
+	if *outputDest == "-" {
+		out = os.Stdout
+	} else {
+		file, err := os.Create(*outputDest)
+		if err != nil {
+			glog.Fatalf("Couldn't open %v: %v", *outputDest, err)
+		}
+		defer file.Close()
+		out = file
+	}
+
+	versionsForConversion := strings.Split(*versions, ",")
+	for _, version := range versionsForConversion {
+		generator := conversion.NewGenerator(api.Scheme.Raw())
+		// TODO(wojtek-t): Change the overwrites to a flag.
+		generator.OverwritePackage(version, "")
+		generator.OverwritePackage("api", "newer")
+		for _, knownType := range api.Scheme.KnownTypes(version) {
+			if err := generator.GenerateConversionsForType(version, knownType); err != nil {
+				glog.Errorf("error while generating conversion functions for %v: %v", knownType, err)
+			}
+		}
+		if err := generator.WriteConversionFunctions(out); err != nil {
+			glog.Fatalf("Error while writing conversion functions: %v", err)
+		}
+	}
+}