vendor/github.com/hashicorp/terraform/plugin/discovery/meta.go

   1 package discovery
   2
   3 import (
   4         "crypto/sha256"
   5         "io"
   6         "os"
   7 )
   8
   9 // PluginMeta is metadata about a plugin, useful for launching the plugin
  10 // and for understanding which plugins are available.
  11 type PluginMeta struct {
  12         // Name is the name of the plugin, e.g. as inferred from the plugin
  13         // binary's filename, or by explicit configuration.
  14         Name string
  15
  16         // Version is the semver version of the plugin, expressed as a string
  17         // that might not be semver-valid.
  18         Version VersionStr
  19
  20         // Path is the absolute path of the executable that can be launched
  21         // to provide the RPC server for this plugin.
  22         Path string
  23 }
  24
  25 // SHA256 returns a SHA256 hash of the content of the referenced executable
  26 // file, or an error if the file's contents cannot be read.
  27 func (m PluginMeta) SHA256() ([]byte, error) {
  28         f, err := os.Open(m.Path)
  29         if err != nil {
  30                 return nil, err
  31         }
  32         defer f.Close()
  33
  34         h := sha256.New()
  35         _, err = io.Copy(h, f)
  36         if err != nil {
  37                 return nil, err
  38         }
  39
  40         return h.Sum(nil), nil
  41 }