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fix: bucker

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bucker "always" does not return a unique id in case of exact same timestamps
This commit is contained in:
Tobias Klein 2017-08-29 18:30:06 +02:00
parent 0ee1650f82
commit 761af08889
1 changed files with 11 additions and 9 deletions
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20
internal/restic/snapshot_policy.go
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@ -34,34 +34,34 @@ func (e ExpirePolicy) Empty() bool {
}
// ymdh returns an integer in the form YYYYMMDDHH.
func ymdh(d time.Time) int {
func ymdh(d time.Time, _ int) int {
return d.Year()*1000000 + int(d.Month())*10000 + d.Day()*100 + d.Hour()
}
// ymd returns an integer in the form YYYYMMDD.
func ymd(d time.Time) int {
func ymd(d time.Time, _ int) int {
return d.Year()*10000 + int(d.Month())*100 + d.Day()
}
// yw returns an integer in the form YYYYWW, where WW is the week number.
func yw(d time.Time) int {
func yw(d time.Time, _ int) int {
year, week := d.ISOWeek()
return year*100 + week
}
// ym returns an integer in the form YYYYMM.
func ym(d time.Time) int {
func ym(d time.Time, _ int) int {
return d.Year()*100 + int(d.Month())
}
// y returns the year of d.
func y(d time.Time) int {
func y(d time.Time, _ int) int {
return d.Year()
}
// always returns a unique number for d.
func always(d time.Time) int {
return int(d.UnixNano())
func always(d time.Time, nr int) int {
return nr
}
// ApplyPolicy returns the snapshots from list that are to be kept and removed
@ -79,7 +79,7 @@ func ApplyPolicy(list Snapshots, p ExpirePolicy) (keep, remove Snapshots) {
var buckets = [6]struct {
Count int
bucker func(d time.Time) int
bucker func(d time.Time, nr int) int
Last int
}{
{p.Last, always, -1},
@ -90,7 +90,9 @@ func ApplyPolicy(list Snapshots, p ExpirePolicy) (keep, remove Snapshots) {
{p.Yearly, y, -1},
}
var nr int
for _, cur := range list {
nr = nr + 1
var keepSnap bool
// Tags are handled specially as they are not counted.
@ -103,7 +105,7 @@ func ApplyPolicy(list Snapshots, p ExpirePolicy) (keep, remove Snapshots) {
// Now update the other buckets and see if they have some counts left.
for i, b := range buckets {
if b.Count > 0 {
val := b.bucker(cur.Time)
val := b.bucker(cur.Time, nr)
if val != b.Last {
keepSnap = true
buckets[i].Last = val