minio/update-main.go
2016-02-11 15:43:36 -08:00

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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 (
"encoding/json"
"errors"
"io/ioutil"
"net/http"
"runtime"
"strings"
"time"
"github.com/fatih/color"
"github.com/minio/cli"
"github.com/minio/minio/pkg/probe"
)
// command specific flags.
var (
updateFlags = []cli.Flag{
cli.BoolFlag{
Name: "help, h",
Usage: "Help for update.",
},
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: updateFlags,
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.")
}
var msg string
if runtime.GOOS == "windows" {
msg = "Download " + u.Download
} else {
msg = "Download " + u.Download
}
msg, err := colorizeUpdateMessage(msg)
fatalIf(err.Trace(msg), "Unable to colorize experimental update notification string "+msg+".", nil)
return msg
}
// JSON jsonified update message.
func (u updateMessage) JSON() string {
u.Status = "success"
updateMessageJSONBytes, err := json.Marshal(u)
fatalIf(probe.NewError(err), "Unable to marshal into JSON.", nil)
return string(updateMessageJSONBytes)
}
func parseReleaseData(data string) (time.Time, *probe.Error) {
releaseStr := strings.Fields(data)
if len(releaseStr) < 2 {
return time.Time{}, probe.NewError(errors.New("Update data malformed"))
}
releaseDate := releaseStr[1]
releaseDateSplits := strings.SplitN(releaseDate, ".", 3)
if len(releaseDateSplits) < 3 {
return time.Time{}, probe.NewError(errors.New("Update data malformed"))
}
if releaseDateSplits[0] != "minio" {
return time.Time{}, probe.NewError(errors.New("Update data malformed, missing minio tag"))
}
if releaseDateSplits[1] != "OFFICIAL" {
return time.Time{}, probe.NewError(errors.New("Update data malformed, missing OFFICIAL tag"))
}
dateSplits := strings.SplitN(releaseDateSplits[2], "T", 2)
if len(dateSplits) < 2 {
return time.Time{}, probe.NewError(errors.New("Update data malformed, not in modified RFC3359 form"))
}
dateSplits[1] = strings.Replace(dateSplits[1], "-", ":", -1)
date := strings.Join(dateSplits, "T")
parsedDate, e := time.Parse(time.RFC3339, date)
if e != nil {
return time.Time{}, probe.NewError(e)
}
return parsedDate, nil
}
// verify updates for releases.
func getReleaseUpdate(updateURL string) {
newUpdateURLPrefix := updateURL + "/" + runtime.GOOS + "-" + runtime.GOARCH
newUpdateURL := newUpdateURLPrefix + "/minio.shasum"
data, e := http.Get(newUpdateURL)
fatalIf(probe.NewError(e), "Unable to read from update URL "+newUpdateURL+".", nil)
if minioVersion == "UNOFFICIAL.GOGET" {
fatalIf(probe.NewError(errors.New("")),
"Update mechanism is not supported for go get based binary builds. Please download official releases from https://minio.io/#minio", nil)
}
current, e := time.Parse(time.RFC3339, minioVersion)
fatalIf(probe.NewError(e), "Unable to parse version string as time.", nil)
if current.IsZero() {
fatalIf(probe.NewError(errors.New("")),
"Updates not supported for custom builds. Version field is empty. Please download official releases from https://minio.io/#minio", nil)
}
body, e := ioutil.ReadAll(data.Body)
fatalIf(probe.NewError(e), "Fetching updates failed. Please try again.", nil)
latest, err := parseReleaseData(string(body))
fatalIf(err.Trace(updateURL), "Please report this issue at https://github.com/minio/minio/issues.", nil)
if latest.IsZero() {
fatalIf(probe.NewError(errors.New("")),
"Unable to validate any update available at this time. Please open an issue at https://github.com/minio/minio/issues", nil)
}
var downloadURL string
if runtime.GOOS == "windows" {
downloadURL = newUpdateURLPrefix + "/minio.exe"
} else {
downloadURL = newUpdateURLPrefix + "/minio"
}
updateMsg := updateMessage{
Download: downloadURL,
Version: minioVersion,
}
if latest.After(current) {
updateMsg.Update = true
}
Println(updateMsg)
}
// main entry point for update command.
func mainUpdate(ctx *cli.Context) {
// Check for update.
if ctx.Bool("experimental") {
getReleaseUpdate(minioUpdateExperimentalURL)
} else {
getReleaseUpdate(minioUpdateStableURL)
}
}