-
Notifications
You must be signed in to change notification settings - Fork 391
/
cachedmetaresolver.go
66 lines (58 loc) · 1.8 KB
/
cachedmetaresolver.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
package earthfile2llb
import (
"context"
"github.com/containerd/containerd/platforms"
"github.com/earthly/earthly/util/syncutil/synccache"
"github.com/moby/buildkit/client/llb"
"github.com/opencontainers/go-digest"
)
var _ llb.ImageMetaResolver = &CachedMetaResolver{}
type cachedMetaResolverKey struct {
ref string
platform string
}
type cachedMetaResolverEntry struct {
ref string
dgst digest.Digest
config []byte
}
// CachedMetaResolver is an image meta resolver with a local cache.
type CachedMetaResolver struct {
metaResolver llb.ImageMetaResolver
cache *synccache.SyncCache // cachedMetaResolverKey -> cachedMetaResolverEntry
}
// NewCachedMetaResolver creates a new cached meta resolver based on an underlying meta resolver
// which needs to be provided.
func NewCachedMetaResolver(metaResolver llb.ImageMetaResolver) *CachedMetaResolver {
return &CachedMetaResolver{
metaResolver: metaResolver,
cache: synccache.New(),
}
}
// ResolveImageConfig implements llb.ImageMetaResolver.ResolveImageConfig.
func (cmr *CachedMetaResolver) ResolveImageConfig(ctx context.Context, ref string, opt llb.ResolveImageConfigOpt) (string, digest.Digest, []byte, error) {
platformStr := ""
if opt.Platform != nil {
platformStr = platforms.Format(*opt.Platform)
}
key := cachedMetaResolverKey{
ref: ref,
platform: platformStr,
}
value, err := cmr.cache.Do(ctx, key, func(ctx context.Context, _ interface{}) (interface{}, error) {
ref, dgst, config, err := cmr.metaResolver.ResolveImageConfig(ctx, ref, opt)
if err != nil {
return nil, err
}
return cachedMetaResolverEntry{
ref: ref,
dgst: dgst,
config: config,
}, nil
})
if err != nil {
return "", "", nil, err
}
entry := value.(cachedMetaResolverEntry)
return entry.ref, entry.dgst, entry.config, nil
}