| 1 | package migrations |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "fmt" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "strconv" |
| 9 | "strings" |
| 10 | |
| 11 | "github.com/ipfs/kubo/config" |
| 12 | "github.com/ipfs/kubo/misc/fsutil" |
| 13 | ) |
| 14 | |
| 15 | const ( |
| 16 | versionFile = "version" |
| 17 | ) |
| 18 | |
| 19 | // IpfsDir returns the path of the ipfs directory. If dir specified, then |
| 20 | // returns the expanded version dir. If dir is "", then return the directory |
| 21 | // set by IPFS_PATH, or if IPFS_PATH is not set, then return the default |
| 22 | // location in the home directory. |
| 23 | func IpfsDir(dir string) (string, error) { |
| 24 | var err error |
| 25 | if dir == "" { |
| 26 | dir, err = config.PathRoot() |
| 27 | if err != nil { |
| 28 | return "", err |
| 29 | } |
| 30 | } |
| 31 | dir, err = fsutil.ExpandHome(dir) |
| 32 | if err != nil { |
| 33 | return "", err |
| 34 | } |
| 35 | return dir, nil |
| 36 | } |
| 37 | |
| 38 | // CheckIpfsDir gets the ipfs directory and checks that the directory exists. |
| 39 | func CheckIpfsDir(dir string) (string, error) { |
| 40 | var err error |
| 41 | dir, err = IpfsDir(dir) |
| 42 | if err != nil { |
| 43 | return "", err |
| 44 | } |
| 45 | |
| 46 | _, err = os.Stat(dir) |
| 47 | if err != nil { |
| 48 | return "", err |
| 49 | } |
| 50 | |
| 51 | return dir, nil |
| 52 | } |
| 53 | |
| 54 | // RepoVersion returns the version of the repo in the ipfs directory. If the |
| 55 | // ipfs directory is not specified then the default location is used. |
| 56 | func RepoVersion(ipfsDir string) (int, error) { |
| 57 | ipfsDir, err := CheckIpfsDir(ipfsDir) |
| 58 | if err != nil { |
| 59 | return 0, err |
| 60 | } |
| 61 | return repoVersion(ipfsDir) |
| 62 | } |
| 63 | |
| 64 | // WriteRepoVersion writes the specified repo version to the repo located in |
| 65 | // ipfsDir. If ipfsDir is not specified, then the default location is used. |
| 66 | func WriteRepoVersion(ipfsDir string, version int) error { |
| 67 | ipfsDir, err := IpfsDir(ipfsDir) |
| 68 | if err != nil { |
| 69 | return err |
| 70 | } |
| 71 | |
| 72 | vFilePath := filepath.Join(ipfsDir, versionFile) |
| 73 | return os.WriteFile(vFilePath, fmt.Appendf(nil, "%d\n", version), 0o644) |
| 74 | } |
| 75 | |
| 76 | func repoVersion(ipfsDir string) (int, error) { |
| 77 | c, err := os.ReadFile(filepath.Join(ipfsDir, versionFile)) |
| 78 | if err != nil { |
| 79 | return 0, err |
| 80 | } |
| 81 | |
| 82 | ver, err := strconv.Atoi(strings.TrimSpace(string(c))) |
| 83 | if err != nil { |
| 84 | return 0, errors.New("invalid data in repo version file") |
| 85 | } |
| 86 | return ver, nil |
| 87 | } |