mirror of
https://github.com/GoogleContainerTools/kaniko
synced 2026-09-30 17:30:51 +02:00
Cole Wippern
b19214ad1e
* use the cachekey of the src stage rather than the digest for COPY --from commands as they are reproducible unlike digests * track digest to cache keys and stage indexes to digest * add extra debug logging for troubleshooting cachekey building issues * convert Sha256 hashes to hex encoded strings rather than plain strings for easier human reading
104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
/*
|
|
Copyright 2018 Google LLC
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package executor
|
|
|
|
import (
|
|
"crypto/sha256"
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"github.com/GoogleContainerTools/kaniko/pkg/util"
|
|
)
|
|
|
|
// NewCompositeCache returns an initialized composite cache object.
|
|
func NewCompositeCache(initial ...string) *CompositeCache {
|
|
c := CompositeCache{
|
|
keys: initial,
|
|
}
|
|
return &c
|
|
}
|
|
|
|
// CompositeCache is a type that generates a cache key from a series of keys.
|
|
type CompositeCache struct {
|
|
keys []string
|
|
}
|
|
|
|
// AddKey adds the specified key to the sequence.
|
|
func (s *CompositeCache) AddKey(k ...string) {
|
|
s.keys = append(s.keys, k...)
|
|
}
|
|
|
|
// Key returns the human readable composite key as a string.
|
|
func (s *CompositeCache) Key() string {
|
|
return strings.Join(s.keys, "-")
|
|
}
|
|
|
|
// Hash returns the composite key in a string SHA256 format.
|
|
func (s *CompositeCache) Hash() (string, error) {
|
|
return util.SHA256(strings.NewReader(s.Key()))
|
|
}
|
|
|
|
func (s *CompositeCache) AddPath(p string) error {
|
|
sha := sha256.New()
|
|
fi, err := os.Lstat(p)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if fi.Mode().IsDir() {
|
|
k, err := HashDir(p)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
s.keys = append(s.keys, k)
|
|
return nil
|
|
}
|
|
fh, err := util.CacheHasher()(p)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if _, err := sha.Write([]byte(fh)); err != nil {
|
|
return err
|
|
}
|
|
|
|
s.keys = append(s.keys, fmt.Sprintf("%x", sha.Sum(nil)))
|
|
return nil
|
|
}
|
|
|
|
// HashDir returns a hash of the directory.
|
|
func HashDir(p string) (string, error) {
|
|
sha := sha256.New()
|
|
if err := filepath.Walk(p, func(path string, fi os.FileInfo, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fileHash, err := util.CacheHasher()(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if _, err := sha.Write([]byte(fileHash)); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return fmt.Sprintf("%x", sha.Sum(nil)), nil
|
|
}
|