ref: e67fbfc75de011c2c7685ae7a10dfce702b2a620
dir: /diff/trees/path.go/
package trees
func joinPath(prefix, name []byte) []byte {
if len(prefix) == 0 {
out := make([]byte, len(name))
copy(out, name)
return out
}
out := make([]byte, len(prefix)+1+len(name))
copy(out, prefix)
out[len(prefix)] = '/'
copy(out[len(prefix)+1:], name)
return out
}