128 lines
2.4 KiB
Go
128 lines
2.4 KiB
Go
package cacheimport
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import (
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"time"
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"github.com/containerd/containerd/content"
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solver "github.com/moby/buildkit/solver-next"
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digest "github.com/opencontainers/go-digest"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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func NewCacheChains() *CacheChains {
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return &CacheChains{visited: map[interface{}]struct{}{}}
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}
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type CacheChains struct {
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items []*item
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visited map[interface{}]struct{}
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}
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func (c *CacheChains) Add(dgst digest.Digest) solver.CacheExporterRecord {
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it := &item{c: c, dgst: dgst}
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c.items = append(c.items, it)
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return it
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}
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func (c *CacheChains) Visit(v interface{}) {
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c.visited[v] = struct{}{}
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}
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func (c *CacheChains) Visited(v interface{}) bool {
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_, ok := c.visited[v]
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return ok
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}
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func (c *CacheChains) normalize() error {
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st := &normalizeState{
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added: map[*item]*item{},
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links: map[*item]map[nlink]map[digest.Digest]struct{}{},
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byKey: map[digest.Digest]*item{},
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}
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for _, it := range c.items {
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_, err := normalizeItem(it, st)
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if err != nil {
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return err
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}
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}
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items := make([]*item, 0, len(st.byKey))
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for _, it := range st.byKey {
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items = append(items, it)
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}
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c.items = items
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return nil
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}
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func (c *CacheChains) Marshal() (*CacheConfig, DescriptorProvider, error) {
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if err := c.normalize(); err != nil {
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return nil, nil, err
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}
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st := &marshalState{
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chainsByID: map[string]int{},
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descriptors: DescriptorProvider{},
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recordsByItem: map[*item]int{},
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}
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for _, it := range c.items {
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if err := marshalItem(it, st); err != nil {
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return nil, nil, err
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}
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}
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cc := CacheConfig{
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Layers: st.layers,
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Records: st.records,
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}
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sortConfig(&cc)
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return &cc, st.descriptors, nil
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}
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type DescriptorProvider map[digest.Digest]DescriptorProviderPair
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type DescriptorProviderPair struct {
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Descriptor ocispec.Descriptor
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Provider content.Provider
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}
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type item struct {
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c *CacheChains
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dgst digest.Digest
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result *solver.Remote
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resultTime time.Time
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links []map[link]struct{}
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}
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type link struct {
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src *item
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selector string
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}
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func (c *item) AddResult(createdAt time.Time, result *solver.Remote) {
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c.resultTime = createdAt
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c.result = result
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}
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func (c *item) LinkFrom(rec solver.CacheExporterRecord, index int, selector string) {
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src, ok := rec.(*item)
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if !ok {
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return
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}
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for {
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if index < len(c.links) {
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break
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}
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c.links = append(c.links, map[link]struct{}{})
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}
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c.links[index][link{src: src, selector: selector}] = struct{}{}
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}
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var _ solver.CacheExporterTarget = &CacheChains{}
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