introduce a --pristine flag to sops exec-env

Signed-off-by: Emil Nikolov <emil.e.nikolov@gmail.com>

Author: e-nikolov

cmd/sops/main.go

@@ -137,6 +137,10 @@ func main() {
 					Name:  "background",
 					Usage: "background the process and don't wait for it to complete",
 				},
+				cli.BoolFlag{
+					Name:  "pristine",
+					Usage: "insert only the decrypted values into the environment without forwarding existing environment variables",
+				},
 				cli.StringFlag{
 					Name:  "user",
 					Usage: "the user to run the command as",
@@ -171,6 +175,7 @@ func main() {
 					Command:    command,
 					Plaintext:  output,
 					Background: c.Bool("background"),
+					Pristine:   c.Bool("pristine"),
 					User:       c.String("user"),
 				}); err != nil {
 					return toExitError(err)

cmd/sops/subcommand/exec/exec.go

@@ -21,6 +21,7 @@ type ExecOpts struct {
 	Command    string
 	Plaintext  []byte
 	Background bool
+	Pristine   bool
 	Fifo       bool
 	User       string
 	Filename   string
@@ -83,7 +84,12 @@ func ExecWithEnv(opts ExecOpts) error {
 		SwitchUser(opts.User)
 	}
 
-	env := os.Environ()
+	var env []string
+
+	if !opts.Pristine {
+		env = os.Environ()
+	}
+
 	lines := bytes.Split(opts.Plaintext, []byte("\n"))
 	for _, line := range lines {
 		if len(line) == 0 {