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update.go
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update.go
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package actions
import (
"drawbridge/pkg/config"
"drawbridge/pkg/errors"
"drawbridge/pkg/utils"
"drawbridge/pkg/version"
"encoding/json"
"fmt"
"github.com/fatih/color"
"github.com/inconshreveable/go-update"
"io/ioutil"
"net/http"
"os"
"runtime"
"strconv"
"time"
)
type UpdateAction struct {
Config config.Interface
}
type GithubReleaseInfo struct {
TagName string `json:"tag_name"`
PublishedAt time.Time `json:"published_at"`
ReleaseNotesUrl string `json:"html_url"`
Assets []struct {
Url string `json:"browser_download_url"`
Name string `json:"name"`
} `json:"assets"`
}
// https://github.com/hyperhq/hypercli/blob/302a6b530148f6a777cd6b8772f706ab5e3da46b/pkg/selfupdate/selfupdate.go
// https://github.com/hyperhq/hypercli/blob/302a6b530148f6a777cd6b8772f706ab5e3da46b/hyper/hyper.go
// https://github.com/inconshreveable/go-update
//
func (e *UpdateAction) Start() error {
latestReleaseReq, err := http.Get("https://api.github.com/repos/AnalogJ/drawbridge/releases/latest")
if err != nil {
return err
}
defer latestReleaseReq.Body.Close()
respBodyJson, err := ioutil.ReadAll(latestReleaseReq.Body)
if err != nil {
return err
}
//parse json
releaseInfo := GithubReleaseInfo{}
err = json.Unmarshal(respBodyJson, &releaseInfo)
if err != nil {
return err
}
//compare the current version to the destination version
currentTimestamp, err := e.currentBinaryTimestamp()
if err != nil {
return err
}
fmt.Printf("Current: %v [%v]. Available: %v [%v]\nRelease notes are available here: %v\n",
e.currentBinaryVersion(),
currentTimestamp.Format("2006-01-02"),
releaseInfo.TagName,
releaseInfo.PublishedAt.Format("2006-01-02"),
releaseInfo.ReleaseNotesUrl,
)
if releaseInfo.TagName == e.currentBinaryVersion() {
return errors.UpdateNotAvailableError("No new version found.")
}
//see if theres a binary for this OS/Arch
assetUrl := ""
requiredOsArch := fmt.Sprintf("drawbridge-%v-%v", runtime.GOOS, runtime.GOARCH)
for _, asset := range releaseInfo.Assets {
if asset.Name == requiredOsArch {
assetUrl = asset.Url
}
}
if len(assetUrl) == 0 {
return errors.UpdateBinaryOsArchMissingError(fmt.Sprintf("Cannot find a drawbridge binary for OS/Arch: %v", requiredOsArch))
}
//TODO: ask user if we should update.
stdinResp := utils.StdinQuery(fmt.Sprintf("Are you sure you would like to update drawbridge to %v?\nPlease confirm [true/false]:", releaseInfo.TagName))
val, err := strconv.ParseBool(stdinResp)
if err != nil {
return err
}
if !val {
color.Red("Cancelled delete operation.")
return nil
}
releaseBinaryReq, err := http.Get(assetUrl)
if err != nil {
return err
}
defer releaseBinaryReq.Body.Close()
err = update.Apply(releaseBinaryReq.Body, update.Options{})
if err != nil {
// error handling
return err
}
return nil
}
func (e *UpdateAction) currentBinaryTimestamp() (time.Time, error) {
execPath, err := os.Executable()
if err != nil {
return time.Time{}, err
}
info, err := os.Stat(execPath)
if err != nil {
return time.Time{}, err
}
return info.ModTime(), err
}
func (e *UpdateAction) currentBinaryVersion() string {
return fmt.Sprintf("v%v", version.VERSION)
}