minio/cmd/update-main.go
Harshavardhana 99a12613a3 update: For source builds look for absolute path. (#3780)
os.Args[0] doesn't point to absolute path we need
use exec.LookPath to find the absolute path before
sending os.Stat().
2017-02-21 01:32:05 -08:00

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/*
* Minio Cloud Storage, (C) 2015, 2016, 2017 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 cmd
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/fatih/color"
"github.com/minio/cli"
"github.com/minio/mc/pkg/console"
)
// Check for new software updates.
var updateCmd = cli.Command{
Name: "update",
Usage: "Check for a new software update.",
Action: mainUpdate,
Flags: []cli.Flag{
cli.BoolFlag{
Name: "quiet",
Usage: "Disable any update messages.",
},
},
CustomHelpTemplate: `Name:
{{.HelpName}} - {{.Usage}}
USAGE:
{{.HelpName}}{{if .VisibleFlags}} [FLAGS]{{end}}
{{if .VisibleFlags}}
FLAGS:
{{range .VisibleFlags}}{{.}}
{{end}}{{end}}
EXIT STATUS:
0 - You are already running the most recent version.
1 - New update is available.
-1 - Error in getting update information.
EXAMPLES:
1. Check if there is a new update available:
$ {{.HelpName}}
`,
}
const (
minioReleaseTagTimeLayout = "2006-01-02T15-04-05Z"
minioReleaseURL = "https://dl.minio.io/server/minio/release/" + runtime.GOOS + "-" + runtime.GOARCH + "/"
)
func getCurrentReleaseTime(minioVersion, minioBinaryPath string) (releaseTime time.Time, err error) {
if releaseTime, err = time.Parse(time.RFC3339, minioVersion); err == nil {
return releaseTime, err
}
if !filepath.IsAbs(minioBinaryPath) {
// Make sure to look for the absolute path of the binary.
minioBinaryPath, err = exec.LookPath(minioBinaryPath)
if err != nil {
return releaseTime, err
}
}
// Looks like version is minio non-standard, we use minio binary's ModTime as release time.
fi, err := os.Stat(minioBinaryPath)
if err != nil {
err = fmt.Errorf("Unable to get ModTime of %s. %s", minioBinaryPath, err)
} else {
releaseTime = fi.ModTime().UTC()
}
return releaseTime, err
}
// GetCurrentReleaseTime - returns this process's release time. If it is official minio version,
// parsed version is returned else minio binary's mod time is returned.
func GetCurrentReleaseTime() (releaseTime time.Time, err error) {
return getCurrentReleaseTime(Version, os.Args[0])
}
func isDocker(cgroupFile string) (bool, error) {
cgroup, err := ioutil.ReadFile(cgroupFile)
if os.IsNotExist(err) {
err = nil
}
return bytes.Contains(cgroup, []byte("docker")), err
}
// IsDocker - returns if the environment is docker or not.
func IsDocker() bool {
found, err := isDocker("/proc/self/cgroup")
if err != nil {
console.Fatalf("Error in docker check: %s", err)
}
return found
}
func isSourceBuild(minioVersion string) bool {
_, err := time.Parse(time.RFC3339, minioVersion)
return err != nil
}
// IsSourceBuild - returns if this binary is made from source or not.
func IsSourceBuild() bool {
return isSourceBuild(Version)
}
// DO NOT CHANGE USER AGENT STYLE.
// The style should be
// Minio (<OS>; <ARCH>[; docker][; source]) Minio/<VERSION> Minio/<RELEASE-TAG> Minio/<COMMIT-ID>
//
// For any change here should be discussed by openning an issue at https://github.com/minio/minio/issues.
func getUserAgent() string {
userAgent := "Minio (" + runtime.GOOS + "; " + runtime.GOARCH
if IsDocker() {
userAgent += "; docker"
}
if IsSourceBuild() {
userAgent += "; source"
}
userAgent += ") " + " Minio/" + Version + " Minio/" + ReleaseTag + " Minio/" + CommitID
return userAgent
}
func downloadReleaseData(releaseChecksumURL string, timeout time.Duration) (data string, err error) {
req, err := http.NewRequest("GET", releaseChecksumURL, nil)
if err != nil {
return data, err
}
req.Header.Set("User-Agent", getUserAgent())
client := &http.Client{
Timeout: timeout,
}
resp, err := client.Do(req)
if err != nil {
return data, err
}
if resp == nil {
return data, fmt.Errorf("No response from server to download URL %s", releaseChecksumURL)
}
if resp.StatusCode != http.StatusOK {
return data, fmt.Errorf("Error downloading URL %s. Response: %v", releaseChecksumURL, resp.Status)
}
dataBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return data, fmt.Errorf("Error reading response. %s", err)
}
data = string(dataBytes)
return data, err
}
// DownloadReleaseData - downloads release data from minio official server.
func DownloadReleaseData(timeout time.Duration) (data string, err error) {
return downloadReleaseData(minioReleaseURL+"minio.shasum", timeout)
}
func parseReleaseData(data string) (releaseTime time.Time, err error) {
fields := strings.Fields(data)
if len(fields) != 2 {
err = fmt.Errorf("Unknown release data `%s`", data)
return releaseTime, err
}
releaseInfo := fields[1]
if fields = strings.Split(releaseInfo, "."); len(fields) != 3 {
err = fmt.Errorf("Unknown release information `%s`", releaseInfo)
return releaseTime, err
}
if !(fields[0] == "minio" && fields[1] == "RELEASE") {
err = fmt.Errorf("Unknown release '%s'", releaseInfo)
return releaseTime, err
}
releaseTime, err = time.Parse(minioReleaseTagTimeLayout, fields[2])
if err != nil {
err = fmt.Errorf("Unknown release time format. %s", err)
}
return releaseTime, err
}
func getLatestReleaseTime(timeout time.Duration) (releaseTime time.Time, err error) {
data, err := DownloadReleaseData(timeout)
if err != nil {
return releaseTime, err
}
return parseReleaseData(data)
}
func getDownloadURL() (downloadURL string) {
if IsDocker() {
return "docker pull minio/minio"
}
if runtime.GOOS == "windows" {
return minioReleaseURL + "minio.exe"
}
return minioReleaseURL + "minio"
}
func getUpdateInfo(timeout time.Duration) (older time.Duration, downloadURL string, err error) {
currentReleaseTime, err := GetCurrentReleaseTime()
if err != nil {
return older, downloadURL, err
}
latestReleaseTime, err := getLatestReleaseTime(timeout)
if err != nil {
return older, downloadURL, err
}
if latestReleaseTime.After(currentReleaseTime) {
older = latestReleaseTime.Sub(currentReleaseTime)
downloadURL = getDownloadURL()
}
return older, downloadURL, nil
}
func mainUpdate(ctx *cli.Context) {
if len(ctx.Args()) != 0 {
cli.ShowCommandHelpAndExit(ctx, "update", -1)
}
quiet := ctx.Bool("quiet") || ctx.GlobalBool("quiet")
quietPrintln := func(args ...interface{}) {
if !quiet {
console.Println(args...)
}
}
older, downloadURL, err := getUpdateInfo(10 * time.Second)
if err != nil {
quietPrintln(err)
os.Exit(-1)
}
if older != time.Duration(0) {
quietPrintln(colorizeUpdateMessage(downloadURL, older))
os.Exit(1)
}
colorSprintf := color.New(color.FgGreen, color.Bold).SprintfFunc()
quietPrintln(colorSprintf("You are already running the most recent version of minio."))
os.Exit(0)
}