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111 lines
2.7 KiB
Go
111 lines
2.7 KiB
Go
package dircache
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import (
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"crypto/sha256"
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"fmt"
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"os"
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"path/filepath"
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"github.com/otiai10/copy"
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"git.cw.tr/mukan-network/mukan-ignite/ignite/config"
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"git.cw.tr/mukan-network/mukan-ignite/ignite/pkg/cache"
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"git.cw.tr/mukan-network/mukan-ignite/ignite/pkg/dirchange"
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"git.cw.tr/mukan-network/mukan-ignite/ignite/pkg/errors"
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)
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var ErrCacheNotFound = errors.New("cache not found")
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type Cache struct {
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path string
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storageCache cache.Cache[string]
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}
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// New creates a new Buf based on the installed binary.
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func New(cacheStorage cache.Storage, dir, specNamespace string) (Cache, error) {
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path, err := cachePath()
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if err != nil {
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return Cache{}, err
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}
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path = filepath.Join(path, dir)
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if err := os.MkdirAll(path, 0o755); err != nil && !os.IsExist(err) {
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return Cache{}, err
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}
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return Cache{
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path: path,
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storageCache: cache.New[string](cacheStorage, specNamespace),
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}, nil
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}
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// ClearCache remove the cache path.
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func ClearCache() error {
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path, err := cachePath()
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if err != nil {
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return err
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}
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return os.RemoveAll(path)
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}
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// cachePath returns the cache path.
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func cachePath() (string, error) {
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globalPath, err := config.DirPath()
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if err != nil {
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return "", err
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}
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return filepath.Join(globalPath, "cache"), nil
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}
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// cacheKey create the cache key.
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func cacheKey(src string, keys ...string) (string, error) {
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checksum, err := dirchange.ChecksumFromPaths(src, "")
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if err != nil {
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return "", err
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}
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h := sha256.New()
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if _, err := h.Write(checksum); err != nil {
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return "", err
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}
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for _, key := range keys {
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if _, err := h.Write([]byte(key)); err != nil {
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return "", err
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}
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}
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return fmt.Sprintf("%x", h.Sum(nil)), nil
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}
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// CopyTo gets the cache folder based on the cache key from the storage and copies the folder to the output.
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func (c Cache) CopyTo(src, output string, keys ...string) (string, error) {
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key, err := cacheKey(src, keys...)
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if err != nil {
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return key, err
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}
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cachedPath, err := c.storageCache.Get(key)
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if errors.Is(err, cache.ErrorNotFound) {
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return key, ErrCacheNotFound
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} else if err != nil {
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return key, err
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}
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if err := copy.Copy(cachedPath, output); err != nil {
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return "", errors.Wrapf(err, "get dir cache cannot copy path %s to %s", cachedPath, output)
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}
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return key, nil
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}
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// Save copies the source to the cache folder and saves the path into the storage based on the key.
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func (c Cache) Save(src, key string) error {
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path := filepath.Join(c.path, key)
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if err := os.Mkdir(path, 0o700); os.IsExist(err) {
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return nil
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} else if err != nil {
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return err
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}
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if err := copy.Copy(src, path); err != nil {
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return errors.Wrapf(err, "save dir cache cannot copy path %s to %s", src, path)
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}
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return c.storageCache.Put(key, path)
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}
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