/
verify-runtime.go
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/
verify-runtime.go
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/*
* Minio Client (C) 2014, 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"
"github.com/minio/mc/pkg/console"
"github.com/minio/minio-xl/pkg/probe"
)
// minGolangRuntimeVersion minimum golang runtime version required for 'mc'.
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 release styles.
const (
betaRegexp = "beta[0-9]"
rcRegexp = "rc[0-9]"
)
// getNormalizedGolangVersion normalize golang version, handles beta, rc and stable releases.
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
}
// version struct captures the semantic versions.
type version struct {
major, minor, patch string
}
// String stringify version.
func (v1 version) String() string {
return fmt.Sprintf("%s%s%s", v1.major, v1.minor, v1.patch)
}
// Version return integer version of String().
func (v1 version) Version() int {
ver, e := strconv.Atoi(v1.String())
fatalIf(probe.NewError(e), "Unable to convert version string to an integer.")
return ver
}
// LessThan figure out if the input version is lesser than current version.
func (v1 version) LessThan(v2 version) bool {
if v1.Version() < v2.Version() {
return true
}
return false
}
// newVersion convert an input semantic version style string into version struct.
func newVersion(v string) version {
ver := version{}
verSlice := strings.Split(v, ".")
ver.major = verSlice[0]
ver.minor = verSlice[1]
if len(verSlice) == 3 {
ver.patch = verSlice[2]
} else {
ver.patch = "0"
}
return ver
}
// checkGolangRuntimeVersion - verify currently compiled runtime version.
func checkGolangRuntimeVersion() {
v1 := newVersion(getNormalizedGolangVersion())
v2 := newVersion(minGolangRuntimeVersion)
if v1.LessThan(v2) {
fatalIf(errDummy().Trace(getNormalizedGolangVersion(), minGolangRuntimeVersion),
"Old Golang runtime version ‘"+v1.String()+"’ detected., ‘mc’ requires minimum go1.5.1 or later.")
}
}
// verifyMCRuntime - verify 'mc' compiled runtime version.
func verifyMCRuntime() {
checkGolangRuntimeVersion()
// Check if mc config exists.
if !isMcConfigExists() {
err := saveMcConfig(newMcConfig())
fatalIf(err.Trace(), "Unable to save new mc config.")
console.Infoln("Configuration written to ‘" + mustGetMcConfigPath() + "’. Please update your access credentials.")
}
// Check if mc session folder exists.
if !isSessionDirExists() {
fatalIf(createSessionDir().Trace(), "Unable to create session config folder.")
}
// Check if mc share folder exists.
if !isShareDirExists() {
initShareConfig()
}
}