File size: 935 Bytes
d2507b5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | //go:build !unix
package bundle
import "path/filepath"
// inodeOf returns a portable fallback identity on platforms without
// syscall.Stat_t inode access (e.g. Windows, wasm). It hashes the resolved
// absolute path so the visited-set still de-duplicates a symlink that points at
// a path already seen. This is weaker than a true inode (two distinct paths to
// the same file via different hardlinks are not deduped), but it is sufficient
// to break path-cycle symlink loops and never panics.
func inodeOf(absPath string) (uint64, bool) {
resolved, err := filepath.EvalSymlinks(absPath)
if err != nil {
resolved = filepath.Clean(absPath)
}
return fnv64a(resolved), true
}
// fnv64a is the standard FNV-1a 64-bit hash of s.
func fnv64a(s string) uint64 {
const (
offset = 1469598103934665603
prime = 1099511628211
)
h := uint64(offset)
for i := 0; i < len(s); i++ {
h ^= uint64(s[i])
h *= prime
}
return h
}
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