builder-next: clear temp leases on startup

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

builder/builder-next/adapters/snapshot/snapshot.go

@@ -75,8 +75,6 @@ func NewSnapshotter(opt Opt, prevLM leases.Manager) (snapshot.Snapshotter, lease
 
 	lm := newLeaseManager(s, prevLM)
 
-	// TODO: temp-leases
-
 	ll, err := lm.List(context.TODO())
 	if err != nil {
 		return nil, nil, err

builder/builder-next/controller.go

@@ -1,6 +1,7 @@
 package buildkit
 
 import (
+	"context"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -166,6 +167,14 @@ func newController(rt http.RoundTripper, opt Opt) (*control.Controller, error) {
 		return nil, err
 	}
 
+	leases, err := lm.List(context.TODO(), "labels.\"buildkit/lease.temporary\"")
+	if err != nil {
+		return nil, err
+	}
+	for _, l := range leases {
+		lm.Delete(context.TODO(), l)
+	}
+
 	wopt := mobyworker.Opt{
 		ID:                "moby",
 		MetadataStore:     md,

builder/builder-next/imagerefchecker/checker.go

@@ -59,7 +59,6 @@ type checker struct {
 }
 
 func (c *checker) Exists(key string, chain []digest.Digest) bool {
-	// TODO: neeeds update
 	if c.opt.ImageStore == nil {
 		return false
 	}