-
Notifications
You must be signed in to change notification settings - Fork 18.6k
/
imageprobe.go
80 lines (67 loc) · 2.11 KB
/
imageprobe.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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"context"
"github.com/containerd/log"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/builder"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
)
// ImageProber exposes an Image cache to the Builder. It supports resetting a
// cache.
type ImageProber interface {
Reset(ctx context.Context) error
Probe(parentID string, runConfig *container.Config, platform ocispec.Platform) (string, error)
}
type resetFunc func(context.Context) (builder.ImageCache, error)
type imageProber struct {
cache builder.ImageCache
reset resetFunc
cacheBusted bool
}
func newImageProber(ctx context.Context, cacheBuilder builder.ImageCacheBuilder, cacheFrom []string, noCache bool) (ImageProber, error) {
if noCache {
return &nopProber{}, nil
}
reset := func(ctx context.Context) (builder.ImageCache, error) {
return cacheBuilder.MakeImageCache(ctx, cacheFrom)
}
cache, err := reset(ctx)
if err != nil {
return nil, err
}
return &imageProber{cache: cache, reset: reset}, nil
}
func (c *imageProber) Reset(ctx context.Context) error {
newCache, err := c.reset(ctx)
if err != nil {
return err
}
c.cache = newCache
c.cacheBusted = false
return nil
}
// Probe checks if cache match can be found for current build instruction.
// It returns the cachedID if there is a hit, and the empty string on miss
func (c *imageProber) Probe(parentID string, runConfig *container.Config, platform ocispec.Platform) (string, error) {
if c.cacheBusted {
return "", nil
}
cacheID, err := c.cache.GetCache(parentID, runConfig, platform)
if err != nil {
return "", err
}
if len(cacheID) == 0 {
log.G(context.TODO()).Debugf("[BUILDER] Cache miss: %s", runConfig.Cmd)
c.cacheBusted = true
return "", nil
}
log.G(context.TODO()).Debugf("[BUILDER] Use cached version: %s", runConfig.Cmd)
return cacheID, nil
}
type nopProber struct{}
func (c *nopProber) Reset(ctx context.Context) error {
return nil
}
func (c *nopProber) Probe(_ string, _ *container.Config, _ ocispec.Platform) (string, error) {
return "", nil
}