1package store

2

3import (

4 "fmt"

5 "os"

6 "strings"

7 "time"

8

9 "github.com/mjl-/mox/mox-"

10 "github.com/mjl-/mox/moxvar"

11 "github.com/mjl-/mox/updates"

12)

13

14// StoreLastKnown stores the the last known version. Future update checks compare

15// against it, or the currently running version, whichever is newer.

16func StoreLastKnown(v updates.Version) error {

17 return os.WriteFile(mox.DataDirPath("lastknownversion"), []byte(v.String()), 0660)

18}

19

20// LastKnown returns the last known version that has been mentioned in an update

21// email, or the current application.

22func LastKnown() (current, lastknown updates.Version, mtime time.Time, rerr error) {

23 curv, curerr := updates.ParseVersion(moxvar.VersionBare)

24

25 p := mox.DataDirPath("lastknownversion")

26 fi, _ := os.Stat(p)

27 if fi != nil {

28 mtime = fi.ModTime()

29 }

30

31 vbuf, err := os.ReadFile(p)

32 if err != nil && !os.IsNotExist(err) {

33 return curv, updates.Version{}, mtime, err

34 }

35

36 lastknown, lasterr := updates.ParseVersion(strings.TrimSpace(string(vbuf)))

37

38 if curerr == nil && lasterr == nil {

39 if curv.After(lastknown) {

40 return curv, curv, mtime, nil

41 }

42 return curv, lastknown, mtime, nil

43 } else if curerr == nil {

44 return curv, curv, mtime, nil

45 } else if lasterr == nil {

46 return curv, lastknown, mtime, nil

47 }

48 if strings.HasPrefix(moxvar.Version, "(devel)") {

49 return curv, updates.Version{}, mtime, fmt.Errorf("development version")

50 }

51 return curv, updates.Version{}, mtime, fmt.Errorf("parsing version: %w", err)

52}

53