Version is a package now, will be re-used across codebase.

pkg/server/api/headers.go

@@ -22,9 +22,11 @@ import (
 	"encoding/json"
 	"encoding/xml"
 	"net/http"
+	"runtime"
 	"strconv"
 
 	"github.com/minio/minio/pkg/donut"
+	"github.com/minio/minio/pkg/version"
 )
 
 // No encoder interface exists, so we create one.
@@ -51,7 +53,7 @@ func generateRequestID() []byte {
 func setCommonHeaders(w http.ResponseWriter, acceptsType string, contentLength int) {
 	// set unique request ID for each reply
 	w.Header().Set("X-Amz-Request-Id", string(generateRequestID()))
-	w.Header().Set("Server", "Minio")
+	w.Header().Set("Server", ("Minio/" + version.Version + " (" + runtime.GOOS + "," + runtime.GOARCH + ")"))
 	w.Header().Set("Accept-Ranges", "bytes")
 	w.Header().Set("Content-Type", acceptsType)
 	w.Header().Set("Connection", "close")

pkg/version/genversion.go

@@ -0,0 +1,85 @@
+// +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"
+	"text/template"
+	"time"
+)
+
+// Version version string
+type Version struct {
+	Date string
+}
+
+func writeVersion(version Version) error {
+	var versionTemplate = `// --------  DO NOT EDIT --------
+// This file is autogenerated by genversion.go during the release process.
+
+package version
+
+// Version autogenerated
+const Version = {{if .Date}}"{{.Date}}"{{else}}""{{end}}
+`
+	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 {
+		return err
+	}
+	defer versionFile.Close()
+	err = t.Execute(versionFile, version)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func genVersion() {
+	t := time.Now().UTC()
+	date := t.Format(time.RFC3339Nano)
+	// Tag is of following format
+	//
+	//   RELEASE.[WeekDay]-[Month]-[Day]-[Hour]-[Min]-[Sec]-GMT-[Year]
+	//
+	tag := fmt.Sprintf(
+		"RELEASE.%s-%s-%02d-%02d-%02d-%02d-GMT-%d",
+		t.Weekday().String()[0:3],
+		t.Month().String()[0:3],
+		t.Day(),
+		t.Hour(),
+		t.Minute(),
+		t.Second(),
+		t.Year())
+	fmt.Println("Release-Tag: " + tag)
+	fmt.Println("Release-Version: " + t.Format(http.TimeFormat))
+	version := Version{Date: date}
+	err := writeVersion(version)
+	if err != nil {
+		fmt.Print(err)
+		os.Exit(1)
+	}
+	fmt.Println("Successfully generated ‘version.go’")
+}
+
+func main() {
+	genVersion()
+}

pkg/version/version.go

@@ -0,0 +1,7 @@
+// --------  DO NOT EDIT --------
+// This file is autogenerated by genversion.go during the release process.
+
+package version
+
+// Version autogenerated
+const Version = "2015-08-14T03:23:47.250240049Z"

pkg/version/version_test.go

@@ -0,0 +1,37 @@
+/*
+ * 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 version_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/minio/minio/pkg/version"
+
+	. "gopkg.in/check.v1"
+)
+
+func Test(t *testing.T) { TestingT(t) }
+
+type MySuite struct{}
+
+var _ = Suite(&MySuite{})
+
+func (s *MySuite) TestVersion(c *C) {
+	_, err := time.Parse(version.Version, time.RFC3339Nano)
+	c.Assert(err, NotNil)
+}