minio/cmd/update-main.go
2016-10-12 18:09:08 -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 cmd
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"os"
"runtime"
"strings"
"time"
"github.com/fatih/color"
"github.com/minio/cli"
"github.com/minio/mc/pkg/console"
)
// command specific flags.
var (
updateFlags = []cli.Flag{
cli.BoolFlag{
Name: "experimental, E",
Usage: "Check experimental update.",
},
}
)
// Check for new software updates.
var updateCmd = cli.Command{
Name: "update",
Usage: "Check for a new software update.",
Action: mainUpdate,
Flags: append(updateFlags, globalFlags...),
CustomHelpTemplate: `Name:
minio {{.Name}} - {{.Usage}}
USAGE:
minio {{.Name}} [FLAGS]
FLAGS:
{{range .Flags}}{{.}}
{{end}}
EXAMPLES:
1. Check for any new official release.
$ minio {{.Name}}
2. Check for any new experimental release.
$ minio {{.Name}} --experimental
`,
}
// update URL endpoints.
const (
minioUpdateStableURL = "https://dl.minio.io/server/minio/release"
minioUpdateExperimentalURL = "https://dl.minio.io/server/minio/experimental"
)
// updateMessage container to hold update messages.
type updateMessage struct {
Status string `json:"status"`
Update bool `json:"update"`
Download string `json:"downloadURL"`
Version string `json:"version"`
}
// String colorized update message.
func (u updateMessage) String() string {
if !u.Update {
updateMessage := color.New(color.FgGreen, color.Bold).SprintfFunc()
return updateMessage("You are already running the most recent version of minio.")
}
msg := colorizeUpdateMessage(u.Download)
return msg
}
// JSON jsonified update message.
func (u updateMessage) JSON() string {
u.Status = "success"
updateMessageJSONBytes, err := json.Marshal(u)
fatalIf((err), "Unable to marshal into JSON.")
return string(updateMessageJSONBytes)
}
func parseReleaseData(data string) (time.Time, error) {
releaseStr := strings.Fields(data)
if len(releaseStr) < 2 {
return time.Time{}, errors.New("Update data malformed")
}
releaseDate := releaseStr[1]
releaseDateSplits := strings.SplitN(releaseDate, ".", 3)
if len(releaseDateSplits) < 3 {
return time.Time{}, (errors.New("Update data malformed"))
}
if releaseDateSplits[0] != "minio" {
return time.Time{}, (errors.New("Update data malformed, missing minio tag"))
}
// "OFFICIAL" tag is still kept for backward compatibility.
// We should remove this for the next release.
if releaseDateSplits[1] != "RELEASE" && releaseDateSplits[1] != "OFFICIAL" {
return time.Time{}, (errors.New("Update data malformed, missing RELEASE tag"))
}
dateSplits := strings.SplitN(releaseDateSplits[2], "T", 2)
if len(dateSplits) < 2 {
return time.Time{}, (errors.New("Update data malformed, not in modified RFC3359 form"))
}
dateSplits[1] = strings.Replace(dateSplits[1], "-", ":", -1)
date := strings.Join(dateSplits, "T")
parsedDate, err := time.Parse(time.RFC3339, date)
if err != nil {
return time.Time{}, err
}
return parsedDate, nil
}
// User Agent should always following the below style.
// Please open an issue to discuss any new changes here.
//
// Minio (OS; ARCH) APP/VER APP/VER
var (
userAgentSuffix = "Minio/" + Version + " " + "Minio/" + ReleaseTag + " " + "Minio/" + CommitID
userAgentPrefix = "Minio (" + runtime.GOOS + "; " + runtime.GOARCH + ") "
userAgent = userAgentPrefix + userAgentSuffix
)
// Check if the operating system is a docker container.
func isDocker() bool {
cgroup, err := ioutil.ReadFile("/proc/self/cgroup")
if err != nil && os.IsNotExist(err) {
return false
}
fatalIf(err, "Unable to read `cgroup` file.")
return bytes.Contains(cgroup, []byte("docker"))
}
// verify updates for releases.
func getReleaseUpdate(updateURL string, duration time.Duration) (updateMsg updateMessage, errMsg string, err error) {
// Construct a new update url.
newUpdateURLPrefix := updateURL + "/" + runtime.GOOS + "-" + runtime.GOARCH
newUpdateURL := newUpdateURLPrefix + "/minio.shasum"
// Get the downloadURL.
var downloadURL string
switch runtime.GOOS {
case "windows":
// For windows.
downloadURL = newUpdateURLPrefix + "/minio.exe"
default:
// For all other operating systems.
downloadURL = newUpdateURLPrefix + "/minio"
}
// Initialize update message.
updateMsg = updateMessage{
Download: downloadURL,
Version: Version,
}
// Instantiate a new client with 3 sec timeout.
client := &http.Client{
Timeout: duration,
}
// Parse current minio version into RFC3339.
current, err := time.Parse(time.RFC3339, Version)
if err != nil {
errMsg = "Unable to parse version string as time."
return
}
// Verify if current minio version is zero.
if current.IsZero() {
err = errors.New("date should not be zero")
errMsg = "Updates mechanism is not supported for custom builds. Please download official releases from https://minio.io/#minio"
return
}
// Initialize new request.
req, err := http.NewRequest("GET", newUpdateURL, nil)
if err != nil {
return
}
// Set user agent.
req.Header.Set("User-Agent", userAgent+" "+fmt.Sprintf("Docker/%t", isDocker()))
// Fetch new update.
resp, err := client.Do(req)
if err != nil {
return
}
// Verify if we have a valid http response i.e http.StatusOK.
if resp != nil {
if resp.StatusCode != http.StatusOK {
errMsg = "Failed to retrieve update notice."
err = errors.New("http status : " + resp.Status)
return
}
}
// Read the response body.
updateBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
errMsg = "Failed to retrieve update notice. Please try again later."
return
}
errMsg = "Failed to retrieve update notice. Please try again later. Please report this issue at https://github.com/minio/minio/issues"
// Parse the date if its valid.
latest, err := parseReleaseData(string(updateBody))
if err != nil {
return
}
// Verify if the date is not zero.
if latest.IsZero() {
err = errors.New("date should not be zero")
return
}
// Is the update latest?.
if latest.After(current) {
updateMsg.Update = true
}
// Return update message.
return updateMsg, "", nil
}
// main entry point for update command.
func mainUpdate(ctx *cli.Context) {
// Error out if 'update' command is issued for development based builds.
if Version == "DEVELOPMENT.GOGET" {
fatalIf(errors.New(""), "Update mechanism is not supported for go get based binary builds. Please download official releases from https://minio.io/#minio")
}
// Check for update.
var updateMsg updateMessage
var errMsg string
var err error
var secs = time.Second * 3
if ctx.Bool("experimental") {
updateMsg, errMsg, err = getReleaseUpdate(minioUpdateExperimentalURL, secs)
} else {
updateMsg, errMsg, err = getReleaseUpdate(minioUpdateStableURL, secs)
}
fatalIf(err, errMsg)
console.Println(updateMsg)
}