[minor] write action to tempfile prior to signing it

src/mig/action.go

@@ -14,6 +14,7 @@ import (
 	"io/ioutil"
 	"math/rand"
 	"mig/pgp"
+	"os"
 	"strconv"
 	"time"
 )
@@ -103,6 +104,34 @@ func ActionFromFile(path string) (Action, error) {
 	return a, err
 }
 
+// ToTempFile writes an action into a generated temporary file and returns its filename
+func (a Action) ToTempFile() (filename string, err error) {
+	var (
+		data []byte
+		fd   *os.File
+		fi   os.FileInfo
+	)
+	data, err = json.Marshal(a)
+	if err != nil {
+		return
+	}
+	fd, err = ioutil.TempFile("", "migaction_")
+	defer fd.Close()
+	if err != nil {
+		return
+	}
+	_, err = fd.Write(data)
+	if err != nil {
+		return
+	}
+	fi, err = fd.Stat()
+	if err != nil {
+		return
+	}
+	filename = fmt.Sprintf("%s/%s", os.TempDir(), fi.Name())
+	return
+}
+
 const MAXINT = int(^uint(0) >> 1)
 
 // GenID returns an ID composed of a unix timestamp and a random CRC32

src/mig/client/client.go

@@ -529,12 +529,20 @@ func (cli Client) SignAction(a mig.Action) (signed_action mig.Action, err error)
 			err = fmt.Errorf("SignAction() -> %v", e)
 		}
 	}()
+	filename, err := a.ToTempFile()
+	if err != nil {
+		panic(err)
+	}
+	a2, err := mig.ActionFromFile(filename)
+	if err != nil {
+		panic(err)
+	}
 	secring, err := os.Open(cli.Conf.GPG.Home + "/secring.gpg")
 	if err != nil {
 		panic(err)
 	}
 	defer secring.Close()
-	sig, err := a.Sign(cli.Conf.GPG.KeyID, secring)
+	sig, err := a2.Sign(cli.Conf.GPG.KeyID, secring)
 	if err != nil {
 		panic(err)
 	}