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package ioutil
import (
"crypto/sha256"
"encoding/json"
"fmt"
"os"
)
func CommitData(path string, data []byte) error {
return os.WriteFile(path, data, 0644) // FIXME: use safefile package for atomic file writes
}
func ReadData(path string) ([]byte, error) {
return os.ReadFile(path)
}
func CommitJSON(path string, obj any) error {
b, err := json.MarshalIndent(obj, "", " ")
if err != nil {
return err
}
return CommitData(path, b)
}
func ReadJSON(path string, obj any) error {
b, err := os.ReadFile(path)
if err != nil {
return fmt.Errorf("%s: %v", path, err)
}
return json.Unmarshal(b, obj)
}
func CreateDirectories(paths []string) error {
for _, path := range paths {
if err := os.Mkdir(path, 0755); err != nil {
return err
}
}
return nil
}
func DirectoriesExist(paths []string) error {
for _, path := range paths {
info, err := os.Stat(path)
if os.IsNotExist(err) {
return fmt.Errorf("directory does not exist: %s", path)
}
if err != nil {
return err
}
if !info.IsDir() {
return fmt.Errorf("%s: is not a directory", path)
}
}
return nil
}
func CopyHashes(hashes [][sha256.Size]byte) (ret [][sha256.Size]byte) {
for _, hash := range hashes {
var dst [sha256.Size]byte
copy(dst[:], hash[:])
ret = append(ret, dst)
}
return
}
func SliceHashes(hashes [][sha256.Size]byte) (ret [][]byte) {
for _, hash := range hashes {
dst := hash
ret = append(ret, dst[:])
}
return
}
// UnsliceHashes panics unless all hashes are 32 bytes
func UnsliceHashes(hashes [][]byte) (ret [][sha256.Size]byte) {
for _, hash := range hashes {
if got, want := len(hash), sha256.Size; got != want {
panic(fmt.Sprintf("bug: invalid hash: size %d", got))
}
var dst [sha256.Size]byte
copy(dst[:], hash)
ret = append(ret, dst)
}
return
}
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