Introduce with_password_safe function

Similar to the with_*device functions introduced in a previous change,
this change introduces a with_password_safe function that is a short
hand for opening the Nitrokey, retrieving a handle to the password safe,
and invoking a user-supplied function on it.
This function will allow us to prevent life time inference problems
caused by passing around a PasswordSafe object, which will contain an
additional reference (and with that, lifetime) in nitrokey version 0.4.

1 files changed, 9 insertions, 0 deletions

diff --git a/nitrocli/src/error.rs b/nitrocli/src/error.rs
index d1eb2eb..c0e7403 100644
--- a/nitrocli/src/error.rs
+++ b/nitrocli/src/error.rs
@@ -47,6 +47,15 @@ pub enum Error {
   Error(String),
 }
 
+impl TryInto<nitrokey::CommandError> for Error {
+  fn try_into(self) -> Result<nitrokey::CommandError, Error> {
+    match self {
+      Error::CommandError(_, err) => Ok(err),
+      err => Err(err),
+    }
+  }
+}
+
 impl From<&str> for Error {
   fn from(s: &str) -> Error {
     Error::Error(s.to_string())