new version format and some cleanup

buildscripts/genversion.go

@@ -0,0 +1,77 @@
+// +build ignore
+
+/*
+ * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ *
+ * 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 (
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"text/template"
+	"time"
+)
+
+var versionTemplate = `// --------  DO NOT EDIT --------
+// This file is autogenerated by genversion.go during the release process.
+
+package main
+
+const minioVersion = {{if .Version}}"{{.Version}}"{{else}}""{{end}}
+const minioReleaseTag = {{if .ReleaseTag}}"{{.ReleaseTag}}"{{else}}""{{end}}
+`
+
+// genVersion generates ‘version.go’.
+func genVersion(version string) {
+	t := template.Must(template.New("version").Parse(versionTemplate))
+	versionFile, err := os.OpenFile("version.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		fmt.Println("genversion: Unable to generate ‘version.go’. Error: %s.", err)
+		os.Exit(1)
+	}
+	defer versionFile.Close()
+
+	err = t.Execute(versionFile, struct {
+		Version    string
+		ReleaseTag string
+	}{version, genReleaseTag(version)})
+
+	if err != nil {
+		fmt.Println("genversion: Unable to generate ‘version.go’. Error: %s.", err)
+		os.Exit(1)
+	}
+}
+
+// genReleaseTag prints release tag to the console for easy git tagging.
+func genReleaseTag(version string) string {
+	relTag := strings.Replace(version, " ", "-", -1)
+	relTag = strings.Replace(relTag, ":", "-", -1)
+	relTag = strings.Replace(relTag, ",", "", -1)
+	return "RELEASE." + relTag
+}
+
+func main() {
+	// Version is in HTTP TimeFormat.
+	version := time.Now().UTC().Format(http.TimeFormat)
+
+	// generate ‘version.go’ file.
+	genVersion(version)
+
+	fmt.Println("Version: \"" + version + "\"")
+	fmt.Println("Release-Tag: " + genReleaseTag(version))
+}