FindCachedFile searches for a file matching SHA256 in the cache directory, Cache file naming format: {basename}-{sha256}.{ext}
(cacheDir, fileName, sha256 string)
| 30 | // FindCachedFile searches for a file matching SHA256 in the cache directory, |
| 31 | // Cache file naming format: {basename}-{sha256}.{ext} |
| 32 | func FindCachedFile(cacheDir, fileName, sha256 string) (string, error) { |
| 33 | if sha256 == "" { |
| 34 | panic(fmt.Sprintf("no sha256 hash provided for %s/%s", cacheDir, fileName)) |
| 35 | } |
| 36 | |
| 37 | if !PathExists(cacheDir) { |
| 38 | return "", nil |
| 39 | } |
| 40 | |
| 41 | // Build cached filename directly: {name}-{sha256}.{ext} |
| 42 | cachedFileName := fmt.Sprintf("%s-%s%s", Base(fileName), sha256, Ext(fileName)) |
| 43 | cachedFilePath := filepath.Join(cacheDir, cachedFileName) |
| 44 | |
| 45 | // Check if the file exists. |
| 46 | if !PathExists(cachedFilePath) { |
| 47 | return "", nil |
| 48 | } |
| 49 | |
| 50 | color.Printf(color.Title, "\n%s\n", fmt.Sprintf("[validating file cache: %s]", fileName)) |
| 51 | color.PrintInline(color.Hint, "- validating with sha256: %s", sha256) |
| 52 | |
| 53 | // Verify file's sha256. |
| 54 | computedHash, err := ComputeSHA256(cachedFilePath) |
| 55 | if err != nil { |
| 56 | color.PrintInline(color.Hint, "✘ validate with sha256: %s\n", sha256) |
| 57 | return "", fmt.Errorf("failed to compute sha-256 for cached file -> %w", err) |
| 58 | } |
| 59 | if computedHash == sha256 { |
| 60 | color.PrintInline(color.Hint, "✔ validate with sha256: %s\n", sha256) |
| 61 | return cachedFilePath, nil |
| 62 | } |
| 63 | |
| 64 | color.PrintInline(color.Hint, "✘ validate with sha256: %s\n", sha256) |
| 65 | return "", nil |
| 66 | } |
| 67 | |
| 68 | // SaveCachedFile saves a downloaded file to the cache directory using SHA256 in the filename. |
| 69 | func SaveCachedFile(srcFile, cacheDir, fileName, sha256 string, chattrFS *ChattrFS) (string, error) { |