minio/verify-runtime.go
2015-10-16 11:26:08 -07:00

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/*
* 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"
"regexp"
"runtime"
"strconv"
"strings"
)
var minGolangRuntimeVersion = "1.5.1"
// following code handles the current Golang release styles, we might have to update them in future
// if golang community divulges from the below formatting style.
const (
betaRegexp = "beta[0-9]"
rcRegexp = "rc[0-9]"
)
func getNormalizedGolangVersion() string {
version := strings.TrimPrefix(runtime.Version(), "go")
br := regexp.MustCompile(betaRegexp)
rr := regexp.MustCompile(rcRegexp)
betaStr := br.FindString(version)
version = strings.TrimRight(version, betaStr)
rcStr := rr.FindString(version)
version = strings.TrimRight(version, rcStr)
return version
}
type golangVersion struct {
major, minor, patch string
}
func newVersion(v string) golangVersion {
ver := golangVersion{}
verSlice := strings.Split(v, ".")
if len(verSlice) < 2 {
Fatalln("Version string missing major and minor versions, cannot proceed exiting.")
}
if len(verSlice) > 3 {
Fatalf("Unknown Version style format, newVersion only supports major.minor.patch not %s.\n", v)
}
ver.major = verSlice[0]
ver.minor = verSlice[1]
if len(verSlice) == 3 {
ver.patch = verSlice[2]
} else {
ver.patch = "0"
}
return ver
}
func (v1 golangVersion) String() string {
return fmt.Sprintf("%s%s%s", v1.major, v1.minor, v1.patch)
}
func (v1 golangVersion) Version() int {
ver, e := strconv.Atoi(v1.String())
if e != nil {
Fatalln("Unable to parse version string.")
}
return ver
}
func (v1 golangVersion) LessThan(v2 golangVersion) bool {
if v1.Version() < v2.Version() {
return true
}
return false
}
func checkGolangRuntimeVersion() {
v1 := newVersion(getNormalizedGolangVersion())
v2 := newVersion(minGolangRuntimeVersion)
if v1.LessThan(v2) {
Fatalln("Old Golang runtime version " + v1.String() + " detected., mc requires minimum go1.5.1 or later.")
}
}