| 1 | package utils |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | "os" |
| 6 | "path/filepath" |
| 7 | "strings" |
| 8 | ) |
| 9 | |
| 10 | func EnsureParentDir(path string) error { |
| 11 | dir := filepath.Dir(strings.TrimSpace(path)) |
| 12 | if dir == "" || dir == "." { |
| 13 | return nil |
| 14 | } |
| 15 | return os.MkdirAll(dir, 0o700) |
| 16 | } |
| 17 | |
| 18 | func FileExists(path string) bool { |
| 19 | path = strings.TrimSpace(path) |
| 20 | if path == "" { |
| 21 | return false |
| 22 | } |
| 23 | _, err := os.Stat(path) |
| 24 | return err == nil |
| 25 | } |
| 26 | |
| 27 | func WriteFileAtomic(path string, data []byte, mode os.FileMode) error { |
| 28 | path = strings.TrimSpace(path) |
| 29 | dir := filepath.Dir(path) |
| 30 | if dir == "" { |
| 31 | dir = "." |
| 32 | } |
| 33 | tmp, err := os.CreateTemp(dir, ".tmp-*") |
| 34 | if err != nil { |
| 35 | return err |
| 36 | } |
| 37 | tmpName := tmp.Name() |
| 38 | defer func() { _ = os.Remove(tmpName) }() |
| 39 | |
| 40 | if _, err := tmp.Write(data); err != nil { |
| 41 | _ = tmp.Close() |
| 42 | return err |
| 43 | } |
| 44 | if err := tmp.Chmod(mode); err != nil { |
| 45 | _ = tmp.Close() |
| 46 | return err |
| 47 | } |
| 48 | if err := tmp.Close(); err != nil { |
| 49 | return err |
| 50 | } |
| 51 | if err := os.Rename(tmpName, path); err != nil { |
| 52 | return err |
| 53 | } |
| 54 | return os.Chmod(path, mode) |
| 55 | } |
| 56 | |
| 57 | func ReadJSONFile(path string, out any) error { |
| 58 | raw, err := os.ReadFile(strings.TrimSpace(path)) |
| 59 | if err != nil { |
| 60 | return err |
| 61 | } |
| 62 | return json.Unmarshal(raw, out) |
| 63 | } |
| 64 | |
| 65 | func ReadJSONFileIfExists(path string, out any) (bool, error) { |
| 66 | err := ReadJSONFile(path, out) |
| 67 | switch { |
| 68 | case err == nil: |
| 69 | return true, nil |
| 70 | case os.IsNotExist(err): |
| 71 | return false, nil |
| 72 | default: |
| 73 | return false, err |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | func WriteJSONFile(path string, payload any, mode os.FileMode) error { |
| 78 | data, err := json.MarshalIndent(payload, "", " ") |
| 79 | if err != nil { |
| 80 | return err |
| 81 | } |
| 82 | if err := EnsureParentDir(path); err != nil { |
| 83 | return err |
| 84 | } |
| 85 | return WriteFileAtomic(path, data, mode) |
| 86 | } |