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|
package local
import (
"context"
"os"
"strings"
"time"
"github.com/moby/buildkit/cache"
"github.com/moby/buildkit/exporter"
"github.com/moby/buildkit/exporter/containerimage/exptypes"
"github.com/moby/buildkit/exporter/local"
"github.com/moby/buildkit/exporter/util/epoch"
"github.com/moby/buildkit/session"
"github.com/moby/buildkit/session/filesync"
"github.com/moby/buildkit/util/progress"
"github.com/pkg/errors"
"github.com/tonistiigi/fsutil"
fstypes "github.com/tonistiigi/fsutil/types"
)
type Opt struct {
SessionManager *session.Manager
}
type localExporter struct {
opt Opt
// session manager
}
func New(opt Opt) (exporter.Exporter, error) {
le := &localExporter{opt: opt}
return le, nil
}
func (e *localExporter) Resolve(ctx context.Context, id int, opt map[string]string) (exporter.ExporterInstance, error) {
li := &localExporterInstance{
localExporter: e,
id: id,
}
_, err := li.opts.Load(opt)
if err != nil {
return nil, err
}
_ = opt
return li, nil
}
type localExporterInstance struct {
*localExporter
id int
opts local.CreateFSOpts
}
func (e *localExporterInstance) ID() int {
return e.id
}
func (e *localExporterInstance) Name() string {
return "exporting to client tarball"
}
func (e *localExporterInstance) Config() *exporter.Config {
return exporter.NewConfig()
}
func (e *localExporterInstance) Export(ctx context.Context, inp *exporter.Source, _ exptypes.InlineCache, sessionID string) (map[string]string, exporter.DescriptorReference, error) {
var defers []func() error
defer func() {
for i := len(defers) - 1; i >= 0; i-- {
defers[i]()
}
}()
if e.opts.Epoch == nil {
if tm, ok, err := epoch.ParseSource(inp); err != nil {
return nil, nil, err
} else if ok {
e.opts.Epoch = tm
}
}
now := time.Now().Truncate(time.Second)
getDir := func(ctx context.Context, k string, ref cache.ImmutableRef, attestations []exporter.Attestation) (*fsutil.Dir, error) {
outputFS, cleanup, err := local.CreateFS(ctx, sessionID, k, ref, attestations, now, e.opts)
if err != nil {
return nil, err
}
if cleanup != nil {
defers = append(defers, cleanup)
}
st := fstypes.Stat{
Mode: uint32(os.ModeDir | 0755),
Path: strings.Replace(k, "/", "_", -1),
}
if e.opts.Epoch != nil {
st.ModTime = e.opts.Epoch.UnixNano()
}
return &fsutil.Dir{
FS: outputFS,
Stat: st,
}, nil
}
isMap := len(inp.Refs) > 0
if _, ok := inp.Metadata[exptypes.ExporterPlatformsKey]; isMap && !ok {
return nil, nil, errors.Errorf("unable to export multiple refs, missing platforms mapping")
}
p, err := exptypes.ParsePlatforms(inp.Metadata)
if err != nil {
return nil, nil, err
}
if !isMap && len(p.Platforms) > 1 {
return nil, nil, errors.Errorf("unable to export multiple platforms without map")
}
var fs fsutil.FS
if len(p.Platforms) > 0 {
dirs := make([]fsutil.Dir, 0, len(p.Platforms))
for _, p := range p.Platforms {
r, ok := inp.FindRef(p.ID)
if !ok {
return nil, nil, errors.Errorf("failed to find ref for ID %s", p.ID)
}
d, err := getDir(ctx, p.ID, r, inp.Attestations[p.ID])
if err != nil {
return nil, nil, err
}
dirs = append(dirs, *d)
}
if isMap {
var err error
fs, err = fsutil.SubDirFS(dirs)
if err != nil {
return nil, nil, err
}
} else {
fs = dirs[0].FS
}
} else {
d, err := getDir(ctx, "", inp.Ref, nil)
if err != nil {
return nil, nil, err
}
fs = d.FS
}
timeoutCtx, cancel := context.WithCancelCause(ctx)
timeoutCtx, _ = context.WithTimeoutCause(timeoutCtx, 5*time.Second, errors.WithStack(context.DeadlineExceeded))
defer cancel(errors.WithStack(context.Canceled))
caller, err := e.opt.SessionManager.Get(timeoutCtx, sessionID, false)
if err != nil {
return nil, nil, err
}
w, err := filesync.CopyFileWriter(ctx, nil, e.id, caller)
if err != nil {
return nil, nil, err
}
report := progress.OneOff(ctx, "sending tarball")
if err := fsutil.WriteTar(ctx, fs, w); err != nil {
w.Close()
return nil, nil, report(err)
}
return nil, nil, report(w.Close())
}
|
