vendor/github.com/hashicorp/terraform/terraform/path.go

   1 package terraform
   2
   3 import (
   4         "crypto/md5"
   5         "encoding/hex"
   6 )
   7
   8 // PathCacheKey returns a cache key for a module path.
   9 //
  10 // TODO: test
  11 func PathCacheKey(path []string) string {
  12         // There is probably a better way to do this, but this is working for now.
  13         // We just create an MD5 hash of all the MD5 hashes of all the path
  14         // elements. This gets us the property that it is unique per ordering.
  15         hash := md5.New()
  16         for _, p := range path {
  17                 single := md5.Sum([]byte(p))
  18                 if _, err := hash.Write(single[:]); err != nil {
  19                         panic(err)
  20                 }
  21         }
  22
  23         return hex.EncodeToString(hash.Sum(nil))
  24 }