Do not use DotEnv store for exec-env.

This avoids quoting problems, fixes #784, and also better handles
various problems that can arise, like '=' in keys and non-string
keys and values.

Signed-off-by: Felix Fontein <felix@fontein.de>

cmd/sops/decrypt.go

@@ -25,8 +25,8 @@ type decryptOpts struct {
 	DecryptionOrder []string
 }
 
-func decrypt(opts decryptOpts) (decryptedFile []byte, err error) {
-	tree, err := common.LoadEncryptedFileWithBugFixes(common.GenericDecryptOpts{
+func decryptTree(opts decryptOpts) (tree *sops.Tree, err error) {
+	tree, err = common.LoadEncryptedFileWithBugFixes(common.GenericDecryptOpts{
 		Cipher:      opts.Cipher,
 		InputStore:  opts.InputStore,
 		InputPath:   opts.InputPath,
@@ -48,6 +48,15 @@ func decrypt(opts decryptOpts) (decryptedFile []byte, err error) {
 		return nil, err
 	}
 
+	return tree, nil
+}
+
+func decrypt(opts decryptOpts) (decryptedFile []byte, err error) {
+	tree, err := decryptTree(opts)
+	if err != nil {
+		return nil, err
+	}
+
 	if len(opts.Extract) > 0 {
 		return extract(tree, opts.Extract, opts.OutputStore)
 	}

cmd/sops/main.go

@@ -192,17 +192,40 @@ func main() {
 					log.Warn("exec-env's --background option is deprecated and will be removed in a future version of sops")
 				}
 
-				output, err := decrypt(opts)
+				tree, err := decryptTree(opts)
 				if err != nil {
 					return toExitError(err)
 				}
 
+				var env []string
+				for _, item := range tree.Branches[0] {
+					if dotenv.IsComplexValue(item.Value) {
+						return cli.NewExitError(fmt.Errorf("cannot use complex value in environment: %s", item.Value), codes.ErrorGeneric)
+					}
+					if _, ok := item.Key.(sops.Comment); ok {
+						continue
+					}
+					key, ok := item.Key.(string)
+					if !ok {
+						return cli.NewExitError(fmt.Errorf("cannot use non-string keys in environment, got %T", item.Key), codes.ErrorGeneric)
+					}
+					if strings.Contains(key, "=") {
+						return cli.NewExitError(fmt.Errorf("cannot use keys with '=' in environment: %s", key), codes.ErrorGeneric)
+					}
+					value, ok := item.Value.(string)
+					if !ok {
+						return cli.NewExitError(fmt.Errorf("cannot use non-string values in environment, got %T", item.Value), codes.ErrorGeneric)
+					}
+					env = append(env, fmt.Sprintf("%s=%s", key, value))
+				}
+
 				if err := exec.ExecWithEnv(exec.ExecOpts{
 					Command:    command,
-					Plaintext:  output,
+					Plaintext:  []byte{},
 					Background: c.Bool("background"),
 					Pristine:   c.Bool("pristine"),
 					User:       c.String("user"),
+					Env:        env,
 				}); err != nil {
 					return toExitError(err)
 				}

cmd/sops/subcommand/exec/exec.go

@@ -30,6 +30,7 @@ type ExecOpts struct {
 	Fifo       bool
 	User       string
 	Filename   string
+	Env        []string
 }
 
 func GetFile(dir, filename string) *os.File {
@@ -88,9 +89,15 @@ func ExecWithFile(opts ExecOpts) error {
 		filename = handle.Name()
 	}
 
+	var env []string
+	if !opts.Pristine {
+		env = os.Environ()
+	}
+	env = append(env, opts.Env...)
+
 	placeholdered := strings.Replace(opts.Command, "{}", filename, -1)
 	cmd := BuildCommand(placeholdered)
-	cmd.Env = os.Environ()
+	cmd.Env = env
 
 	if opts.Background {
 		return cmd.Start()
@@ -125,6 +132,8 @@ func ExecWithEnv(opts ExecOpts) error {
 		env = append(env, string(line))
 	}
 
+	env = append(env, opts.Env...)
+
 	cmd := BuildCommand(opts.Command)
 	cmd.Env = env
 

functional-tests/src/lib.rs

@@ -902,7 +902,7 @@ echo -E "${bar}"
             String::from_utf8_lossy(&output.stdout),
             String::from_utf8_lossy(&output.stderr)
         );
-        assert_eq!(String::from_utf8_lossy(&output.stdout), "baz\\nbam\n");
+        assert_eq!(String::from_utf8_lossy(&output.stdout), "baz\nbam\n");
     }
 
     #[test]

stores/dotenv/store.go

@@ -134,7 +134,7 @@ func (store *Store) EmitEncryptedFile(in sops.Tree) ([]byte, error) {
 func (store *Store) EmitPlainFile(in sops.TreeBranches) ([]byte, error) {
 	buffer := bytes.Buffer{}
 	for _, item := range in[0] {
-		if isComplexValue(item.Value) {
+		if IsComplexValue(item.Value) {
 			return nil, fmt.Errorf("cannot use complex value in dotenv file: %s", item.Value)
 		}
 		var line string
@@ -166,7 +166,7 @@ func (store *Store) EmitExample() []byte {
 	return bytes
 }
 
-func isComplexValue(v interface{}) bool {
+func IsComplexValue(v interface{}) bool {
 	switch v.(type) {
 	case []interface{}:
 		return true