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|
package dockerui
import (
"context"
"encoding/json"
"fmt"
"github.com/containerd/platforms"
"github.com/moby/buildkit/exporter/containerimage/exptypes"
"github.com/moby/buildkit/frontend/gateway/client"
dockerspec "github.com/moby/docker-image-spec/specs-go/v1"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"golang.org/x/sync/errgroup"
)
type BuildFunc func(ctx context.Context, platform *ocispecs.Platform, idx int) (r client.Reference, img, baseImg *dockerspec.DockerOCIImage, err error)
func (bc *Client) Build(ctx context.Context, fn BuildFunc) (*ResultBuilder, error) {
res := client.NewResult()
targets := make([]*ocispecs.Platform, 0, len(bc.TargetPlatforms))
for _, p := range bc.TargetPlatforms {
p := p
targets = append(targets, &p)
}
if len(targets) == 0 {
targets = append(targets, nil)
}
expPlatforms := &exptypes.Platforms{
Platforms: make([]exptypes.Platform, len(targets)),
}
eg, ctx := errgroup.WithContext(ctx)
for i, tp := range targets {
i, tp := i, tp
eg.Go(func() error {
ref, img, baseImg, err := fn(ctx, tp, i)
if err != nil {
return err
}
config, err := json.Marshal(img)
if err != nil {
return errors.Wrapf(err, "failed to marshal image config")
}
var baseConfig []byte
if baseImg != nil {
baseConfig, err = json.Marshal(baseImg)
if err != nil {
return errors.Wrapf(err, "failed to marshal source image config")
}
}
p := platforms.DefaultSpec()
if tp != nil {
p = *tp
}
// in certain conditions we allow input platform to be extended from base image
if p.OS == "windows" && img.OS == p.OS {
if p.OSVersion == "" && img.OSVersion != "" {
p.OSVersion = img.OSVersion
}
if p.OSFeatures == nil && len(img.OSFeatures) > 0 {
p.OSFeatures = append([]string{}, img.OSFeatures...)
}
}
p = platforms.Normalize(p)
k := platforms.Format(p)
if bc.MultiPlatformRequested {
res.AddRef(k, ref)
res.AddMeta(fmt.Sprintf("%s/%s", exptypes.ExporterImageConfigKey, k), config)
if len(baseConfig) > 0 {
res.AddMeta(fmt.Sprintf("%s/%s", exptypes.ExporterImageBaseConfigKey, k), baseConfig)
}
} else {
res.SetRef(ref)
res.AddMeta(exptypes.ExporterImageConfigKey, config)
if len(baseConfig) > 0 {
res.AddMeta(exptypes.ExporterImageBaseConfigKey, baseConfig)
}
}
expPlatforms.Platforms[i] = exptypes.Platform{
ID: k,
Platform: p,
}
return nil
})
}
if err := eg.Wait(); err != nil {
return nil, err
}
return &ResultBuilder{
Result: res,
expPlatforms: expPlatforms,
}, nil
}
type ResultBuilder struct {
*client.Result
expPlatforms *exptypes.Platforms
}
func (rb *ResultBuilder) Finalize() (*client.Result, error) {
dt, err := json.Marshal(rb.expPlatforms)
if err != nil {
return nil, err
}
rb.AddMeta(exptypes.ExporterPlatformsKey, dt)
return rb.Result, nil
}
func (rb *ResultBuilder) EachPlatform(ctx context.Context, fn func(ctx context.Context, id string, p ocispecs.Platform) error) error {
eg, ctx := errgroup.WithContext(ctx)
for _, p := range rb.expPlatforms.Platforms {
p := p
eg.Go(func() error {
return fn(ctx, p.ID, p.Platform)
})
}
return eg.Wait()
}
|
