func rebuild_file(c []child, patch_num int, dest string) string {
if patch_num == 0 {
return "restored/.tmp/" + c[0].Name
}
err := os.Rename("restored/.tmp/"+c[0].Name, "restored/.tmp/base")
if err != nil {
log.Fatal(err)
}
for i := 1; i <= patch_num; i++ {
f, err := os.Open("restored/.tmp/base")
if err != nil {
log.Fatal(err)
}
m, err := os.OpenFile("restored/.tmp/master", os.O_CREATE|os.O_WRONLY, 0777)
if err != nil {
log.Fatal(err)
}
p, err := os.Open("restored/.tmp/" + c[i].Name)
if err != nil {
log.Fatal(err)
}
err = binarydist.Patch(f, m, p)
if err != nil {
log.Fatal(err)
}
m.Close()
f.Close()
p.Close()
os.Rename("restored/.tmp/master", "restored/.tmp/base")
}
return "restored/.tmp/base"
}
func (u *Updater) fetchAndApplyPatch(old io.Reader) ([]byte, error) {
r, err := fetch(u.diffURL + u.cmdName + "/" + Version + "/" + u.info.Version + "/" + plat)
if err != nil {
return nil, err
}
defer r.Close()
var buf bytes.Buffer
err = binarydist.Patch(old, &buf, r)
return buf.Bytes(), err
}
func applyPatch(patch io.Reader, updatePath string) ([]byte, error) {
// open the file to update
old, err := os.Open(updatePath)
if err != nil {
return nil, err
}
defer old.Close()
// apply the patch
applied := new(bytes.Buffer)
if err = binarydist.Patch(old, applied, patch); err != nil {
return nil, err
}
return applied.Bytes(), nil
}
// Update the currently running binary to a specific version
func (d *Dist) UpdateTo(to string) (err error) {
if d.Version == to {
return errors.New("nothing to update")
}
binary, _ := osext.Executable()
reader, err := os.Open(binary)
if err != nil {
return err
}
defer reader.Close()
url := fmt.Sprintf("%s/projects/%s/diff/%s/%s/%s-%s", d.Host, d.Project, d.Version, to, runtime.GOOS, runtime.GOARCH)
patch, err := d.httpGet(url)
if err != nil {
return err
}
writer := new(bytes.Buffer)
err = binarydist.Patch(reader, writer, bytes.NewReader(patch))
if err != nil {
return err
}
reader.Close()
err, _ = update.FromStream(writer)
return
}
func (u *Updater) fetchAndApply() {
instPath, err := exec.LookPath("hk")
if err != nil {
log.Fatal(err)
}
old, err := os.Open(instPath)
if err != nil {
log.Fatal(err)
}
plat := runtime.GOOS + "-" + runtime.GOARCH
resp, err := http.Get(u.url + plat + "/" + Version + "/next.hkdiff")
if err != nil {
log.Fatal(err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
log.Fatal(resp.Status)
}
var header struct {
Magic [8]byte
OldHash [sha1.Size]byte
NewHash [sha1.Size]byte
DiffHash [sha1.Size]byte
}
err = binary.Read(resp.Body, binary.BigEndian, &header)
if err != nil {
log.Fatal(err)
}
if header.Magic != magic {
log.Fatal("format error in update file")
}
patch, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatal(err)
}
if !sha1matches(header.OldHash, old) {
log.Fatal("existing version hash match update")
}
if !sha1matches(header.DiffHash, bytes.NewReader(patch)) {
log.Fatal("bad patch file")
}
_, err = old.Seek(0, 0)
if err != nil {
log.Fatal(err)
}
part := u.dir + upnextPath + ".part"
newPart, err := os.OpenFile(part, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0777)
if err != nil {
log.Fatal(err)
}
err = binarydist.Patch(old, newPart, bytes.NewReader(patch))
if err != nil {
log.Fatal(err)
}
err = newPart.Close()
if err != nil {
log.Fatal(err)
}
newPart, err = os.Open(part)
if err != nil {
log.Fatal(err)
}
if !sha1matches(header.NewHash, newPart) {
log.Fatal("checksum mismatch after patch")
}
err = os.Rename(part, u.dir+upnextPath)
if err != nil {
log.Fatal(err)
}
}
func (u *Updater) fetchAndApply() error {
instPath, err := exec.LookPath("hk")
if err != nil {
return err
}
old, err := os.Open(instPath)
if err != nil {
return err
}
plat := runtime.GOOS + "-" + runtime.GOARCH
name := "hk-" + Version + "-next-" + plat + ".hkdiff"
resp, err := http.Get(u.url + name)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
log.Fatal(resp.Status)
}
var header struct {
Magic [8]byte
OldHash [sha1.Size]byte
NewHash [sha1.Size]byte
DiffHash [sha1.Size]byte
}
err = binary.Read(resp.Body, binary.BigEndian, &header)
if err != nil {
return err
}
if header.Magic != magic {
log.Fatal("format error in update file")
}
patch, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
if readSha1(old) != header.OldHash {
log.Fatal("old hash mismatch")
}
if readSha1(bytes.NewReader(patch)) != header.DiffHash {
log.Fatal("bad patch file")
}
_, err = old.Seek(0, 0)
if err != nil {
return err
}
var buf bytes.Buffer
err = binarydist.Patch(old, &buf, bytes.NewReader(patch))
if err != nil {
return err
}
if readSha1(bytes.NewReader(buf.Bytes())) != header.NewHash {
log.Fatal("checksum mismatch after patch")
}
part := path.Dir(instPath) + "/.hk.part"
dstf, err := os.OpenFile(part, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0777)
if err != nil {
return err
}
defer os.Remove(part)
_, err = dstf.Write(buf.Bytes())
if err != nil {
return err
}
err = dstf.Close()
if err != nil {
return err
}
return os.Rename(part, instPath)
}