| 1 | package cli |
| 2 | |
| 3 | import ( |
| 4 | "net/url" |
| 5 | "os" |
| 6 | pathpkg "path" |
| 7 | "path/filepath" |
| 8 | "strings" |
| 9 | |
| 10 | "reasonix/internal/shellparse" |
| 11 | ) |
| 12 | |
| 13 | // pastedPathCandidates returns literal filesystem paths without executing a |
| 14 | // shell. Windows tries the native spelling first, then static shell-decoded |
| 15 | // forms used by Git Bash, MSYS2, Cygwin, and WSL drive mounts. |
| 16 | func pastedPathCandidates(src, goos string, shellDecoded bool) []string { |
| 17 | src = strings.TrimSpace(src) |
| 18 | src = strings.TrimPrefix(src, "@") |
| 19 | if src == "" { |
| 20 | return nil |
| 21 | } |
| 22 | |
| 23 | var out []string |
| 24 | seen := map[string]bool{} |
| 25 | add := func(candidate string) { |
| 26 | candidate, ok := normalizePastedPathCandidate(candidate, goos) |
| 27 | if !ok || seen[candidate] { |
| 28 | return |
| 29 | } |
| 30 | seen[candidate] = true |
| 31 | out = append(out, candidate) |
| 32 | } |
| 33 | |
| 34 | if shellDecoded { |
| 35 | add(src) |
| 36 | return out |
| 37 | } |
| 38 | |
| 39 | inner, quoted := trimMatchingPathQuotes(src) |
| 40 | if goos == "windows" { |
| 41 | if quoted { |
| 42 | add(inner) |
| 43 | } else if !hasUnescapedPathWhitespace(src) { |
| 44 | add(src) |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | if fields, malformed := shellparse.StaticFields(src); malformed == "" && len(fields) == 1 { |
| 49 | add(fields[0]) |
| 50 | } |
| 51 | |
| 52 | if goos == "windows" { |
| 53 | if !quoted && !hasUnescapedPathWhitespace(src) && strings.Contains(src, `\`) { |
| 54 | add(unescapeWindowsShellPath(src)) |
| 55 | } |
| 56 | } else if quoted { |
| 57 | add(inner) |
| 58 | } else if !hasUnescapedPathWhitespace(src) { |
| 59 | // Preserve the pre-existing POSIX behavior for unusual inputs the static |
| 60 | // parser rejects, such as a trailing literal backslash. |
| 61 | add(unescapeShellPath(src)) |
| 62 | } |
| 63 | |
| 64 | return out |
| 65 | } |
| 66 | |
| 67 | func resolveExistingPastedPath(src, goos string, shellDecoded bool, exists func(string) bool) (string, bool) { |
| 68 | if exists == nil { |
| 69 | return "", false |
| 70 | } |
| 71 | for _, candidate := range pastedPathCandidates(src, goos, shellDecoded) { |
| 72 | if exists(candidate) { |
| 73 | return candidate, true |
| 74 | } |
| 75 | } |
| 76 | return "", false |
| 77 | } |
| 78 | |
| 79 | func pastedPathExists(path string) bool { |
| 80 | info, err := os.Stat(path) |
| 81 | return err == nil && !info.IsDir() |
| 82 | } |
| 83 | |
| 84 | func trimMatchingPathQuotes(src string) (string, bool) { |
| 85 | if len(src) < 2 { |
| 86 | return src, false |
| 87 | } |
| 88 | first, last := src[0], src[len(src)-1] |
| 89 | if (first == '\'' || first == '"') && first == last { |
| 90 | return src[1 : len(src)-1], true |
| 91 | } |
| 92 | return src, false |
| 93 | } |
| 94 | |
| 95 | func normalizePastedPathCandidate(src, goos string) (string, bool) { |
| 96 | if src == "" { |
| 97 | return "", false |
| 98 | } |
| 99 | lower := strings.ToLower(src) |
| 100 | if strings.HasPrefix(lower, "http://") || strings.HasPrefix(lower, "https://") { |
| 101 | return "", false |
| 102 | } |
| 103 | if strings.HasPrefix(lower, "file://") { |
| 104 | u, err := url.Parse(src) |
| 105 | if err != nil || u.Path == "" { |
| 106 | return "", false |
| 107 | } |
| 108 | src = u.Path |
| 109 | if goos == "windows" && u.Host != "" { |
| 110 | src = "//" + u.Host + u.Path |
| 111 | } |
| 112 | } |
| 113 | if strings.HasPrefix(src, "~/") { |
| 114 | home, err := os.UserHomeDir() |
| 115 | if err == nil && home != "" { |
| 116 | src = filepath.Join(home, strings.TrimPrefix(src, "~/")) |
| 117 | } |
| 118 | } |
| 119 | if goos == "windows" { |
| 120 | src = normalizeWindowsPOSIXPath(src) |
| 121 | return src, src != "" |
| 122 | } |
| 123 | return pathpkg.Clean(src), true |
| 124 | } |
| 125 | |
| 126 | func normalizeWindowsPOSIXPath(src string) string { |
| 127 | if len(src) >= 4 && src[0] == '/' && isASCIIAlpha(src[1]) && src[2] == ':' && src[3] == '/' { |
| 128 | return strings.ToUpper(src[1:2]) + src[2:] |
| 129 | } |
| 130 | if len(src) >= 3 && src[0] == '/' && isASCIIAlpha(src[1]) && src[2] == '/' { |
| 131 | return strings.ToUpper(src[1:2]) + ":" + src[2:] |
| 132 | } |
| 133 | lower := strings.ToLower(src) |
| 134 | if len(src) >= 7 && strings.HasPrefix(lower, "/mnt/") && isASCIIAlpha(src[5]) && src[6] == '/' { |
| 135 | return strings.ToUpper(src[5:6]) + ":" + src[6:] |
| 136 | } |
| 137 | const cygdrive = "/cygdrive/" |
| 138 | if len(src) >= len(cygdrive)+2 && strings.HasPrefix(lower, cygdrive) && isASCIIAlpha(src[len(cygdrive)]) && src[len(cygdrive)+1] == '/' { |
| 139 | return strings.ToUpper(src[len(cygdrive):len(cygdrive)+1]) + ":" + src[len(cygdrive)+1:] |
| 140 | } |
| 141 | return src |
| 142 | } |
| 143 | |
| 144 | // unescapeWindowsShellPath keeps likely native separator backslashes while |
| 145 | // decoding shell escapes. This candidate is only used after the exact native |
| 146 | // spelling fails the caller's existence check, so punctuation-led native path |
| 147 | // components still resolve through the native candidate first. |
| 148 | func unescapeWindowsShellPath(src string) string { |
| 149 | var b strings.Builder |
| 150 | b.Grow(len(src)) |
| 151 | i := 0 |
| 152 | // A leading double backslash is a UNC or device prefix (\\server\share, |
| 153 | // \\?\C:\..., \\.\...), not an escape pair; keep it verbatim. |
| 154 | if strings.HasPrefix(src, `\\`) { |
| 155 | b.WriteString(`\\`) |
| 156 | i = 2 |
| 157 | } |
| 158 | for ; i < len(src); i++ { |
| 159 | if src[i] != '\\' || i+1 >= len(src) { |
| 160 | b.WriteByte(src[i]) |
| 161 | continue |
| 162 | } |
| 163 | next := src[i+1] |
| 164 | if windowsPathComponentByte(next) { |
| 165 | b.WriteByte(src[i]) |
| 166 | continue |
| 167 | } |
| 168 | b.WriteByte(next) |
| 169 | i++ |
| 170 | } |
| 171 | return b.String() |
| 172 | } |
| 173 | |
| 174 | func windowsPathComponentByte(ch byte) bool { |
| 175 | return ch >= 0x80 || ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z' || ch >= '0' && ch <= '9' || ch == '.' || ch == '_' || ch == '-' |
| 176 | } |
| 177 | |
| 178 | func isASCIIAlpha(ch byte) bool { |
| 179 | return ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z' |
| 180 | } |
| 181 |