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update.go
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/
update.go
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package updater
import (
"archive/tar"
"compress/gzip"
"context"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/gopasspw/gopass/pkg/out"
"github.com/gopasspw/gopass/pkg/termio"
"github.com/blang/semver"
"github.com/cenkalti/backoff"
"github.com/dominikschulz/github-releases/ghrel"
"github.com/muesli/goprogressbar"
"github.com/pkg/errors"
)
var (
// UpdateMoveAfterQuit is exported for testing
UpdateMoveAfterQuit = true
)
const (
gitHubOrg = "gopasspw"
gitHubRepo = "gopass"
)
// Update will start hte interactive update assistant
func Update(ctx context.Context, pre bool, version semver.Version) error {
if err := IsUpdateable(ctx); err != nil {
out.Error(ctx, "Your gopass binary is externally managed. Can not update.")
out.Debug(ctx, "Error: %s", err)
return nil
}
ok, err := termio.AskForBool(ctx, "Do you want to check for available updates?", true)
if err != nil {
return err
}
if !ok {
return nil
}
r, err := LatestRelease(ctx, pre || len(version.Pre) > 0)
if err != nil {
return err
}
out.Debug(ctx, "Current: %s - Latest: %s", version.String(), r.Version().String())
if version.GTE(r.Version()) {
out.Green(ctx, "gopass is up to date (%s)", version.String())
return nil
}
out.Debug(ctx, "Assets: %+v", r.Assets)
for _, asset := range r.Assets {
name := strings.TrimSuffix(strings.TrimPrefix(asset.Name, "gopass-"), ".tar.gz")
p := strings.Split(name, "-")
if len(p) < 3 {
continue
}
if p[len(p)-2] != runtime.GOOS {
continue
}
if p[len(p)-1] != runtime.GOARCH {
continue
}
if asset.URL == "" {
continue
}
if err := updateTo(ctx, r.Version().String(), asset.URL); err != nil {
return errors.Wrapf(err, "Failed to update gopass: %s", err)
}
return nil
}
return errors.New("no supported binary found")
}
// LatestRelease fetches and return the latest release of gopass from GitHub
func LatestRelease(ctx context.Context, pre bool) (ghrel.Release, error) {
if pre {
return ghrel.FetchLatestRelease(gitHubOrg, gitHubRepo)
}
return ghrel.FetchLatestStableRelease(gitHubOrg, gitHubRepo)
}
func updateCheckHost(ctx context.Context, u *url.URL) error {
host, _, err := net.SplitHostPort(u.Host)
if err != nil {
out.Debug(ctx, "failed to split host port: %s", err)
if e, ok := err.(*net.AddrError); ok && e.Err != "missing port in address" {
return errors.Wrapf(err, "failed to split host port")
}
host = u.Host
}
if u.Scheme != "https" && host != "localhost" && host != "127.0.0.1" {
return errors.Errorf("refusing non-https URL '%s'", u.String())
}
return nil
}
func updateTo(ctx context.Context, version, url string) error {
out.Debug(ctx, "URL: %s", url)
out.Green(ctx, "Update available!")
ok, err := termio.AskForBool(ctx, fmt.Sprintf("Do you want to update gopass to %s?", version), true)
if err != nil {
return err
}
if !ok {
return nil
}
return updateGopass(ctx, version, url)
}
func extract(ctx context.Context, archive, dest string) error {
out.Debug(ctx, "Reading from %s", archive)
fh, err := os.Open(archive)
if err != nil {
return err
}
defer func() {
_ = fh.Close()
}()
dfh, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0755)
if err != nil {
return errors.Wrapf(err, "Failed to open file: %s", dest)
}
defer func() {
_ = dfh.Close()
}()
gzr, err := gzip.NewReader(fh)
if err != nil {
return err
}
tarReader := tar.NewReader(gzr)
for {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
return errors.Wrapf(err, "Failed to read from tar file")
}
name := filepath.Base(header.Name)
if header.Typeflag == tar.TypeReg && name == "gopass" {
_, err := io.Copy(dfh, tarReader)
return errors.Wrapf(err, "Failed to read gopass from tar file")
}
}
return errors.Errorf("file not found in archive")
}
func tryDownload(ctx context.Context, dest, url string) error {
bo := backoff.NewExponentialBackOff()
bo.MaxElapsedTime = 5 * time.Minute
return backoff.Retry(func() error {
select {
case <-ctx.Done():
return backoff.Permanent(errors.New("user aborted"))
default:
}
return download(ctx, dest, url)
}, bo)
}
func download(ctx context.Context, dest, url string) error {
fh, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0755)
if err != nil {
return err
}
resp, err := http.Get(url)
if err != nil {
return err
}
var body io.ReadCloser
if resp.ContentLength > 0 {
body = &passThru{
ReadCloser: resp.Body,
Bar: &goprogressbar.ProgressBar{
Text: path.Base(url),
Total: resp.ContentLength,
Current: 0,
Width: 80,
PrependTextFunc: func(p *goprogressbar.ProgressBar) string {
return fmt.Sprintf("%d / %d byte", p.Current, p.Total)
},
},
}
if out.IsHidden(ctx) {
old := goprogressbar.Stdout
goprogressbar.Stdout = ioutil.Discard
defer func() {
goprogressbar.Stdout = old
}()
}
} else {
body = resp.Body
}
count, err := io.Copy(fh, body)
if err != nil {
return err
}
fmt.Fprintln(goprogressbar.Stdout, "")
out.Debug(ctx, "Transferred %d bytes from %s to %s", count, url, dest)
return nil
}
type passThru struct {
io.ReadCloser
Bar *goprogressbar.ProgressBar
}
func (pt *passThru) Read(p []byte) (int, error) {
n, err := pt.ReadCloser.Read(p)
if pt.Bar != nil {
pt.Bar.Current += int64(n)
pt.Bar.LazyPrint()
}
return n, err
}