vendor files

vendor/github.com/gogo/protobuf/version/version.go

@@ -0,0 +1,78 @@
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2013, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package version
+
+import (
+	"fmt"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+func Get() string {
+	versionBytes, _ := exec.Command("protoc", "--version").CombinedOutput()
+	version := strings.TrimSpace(string(versionBytes))
+	versions := strings.Split(version, " ")
+	if len(versions) != 2 {
+		panic("version string returned from protoc is seperated with a space: " + version)
+	}
+	return versions[1]
+}
+
+func parseVersion(version string) (int, error) {
+	versions := strings.Split(version, ".")
+	if len(versions) != 3 {
+		return 0, fmt.Errorf("version does not have 3 numbers seperated by dots: %s", version)
+	}
+	n := 0
+	for _, v := range versions {
+		i, err := strconv.Atoi(v)
+		if err != nil {
+			return 0, err
+		}
+		n = n*10 + i
+	}
+	return n, nil
+}
+
+func less(this, that string) bool {
+	thisNum, err := parseVersion(this)
+	if err != nil {
+		panic(err)
+	}
+	thatNum, err := parseVersion(that)
+	if err != nil {
+		panic(err)
+	}
+	return thisNum <= thatNum
+}
+
+func AtLeast(v string) bool {
+	return less(v, Get())
+}