1package mox

2

3import (

4 "fmt"

5 "os"

6 "strings"

7 "time"

8

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

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

11)

12

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

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

15func StoreLastKnown(v updates.Version) error {

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

17}

18

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

20// email, or the current application.

21func LastKnown() (current, lastknown updates.Version, mtime time.Time, rerr error) {

22 curv, curerr := updates.ParseVersion(moxvar.Version)

23

24 p := DataDirPath("lastknownversion")

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

26 if fi != nil {

27 mtime = fi.ModTime()

28 }

29

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

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

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

33 }

34

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

36

37 if curerr == nil && lasterr == nil {

38 if curv.After(lastknown) {

39 return curv, curv, mtime, nil

40 }

41 return curv, lastknown, mtime, nil

42 } else if curerr == nil {

43 return curv, curv, mtime, nil

44 } else if lasterr == nil {

45 return curv, lastknown, mtime, nil

46 }

47 if moxvar.Version == "(devel)" {

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

49 }

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

51}

52