Ask for the password even if stdin is not connected to the TTY.

- As we prompt on the TTY, we can do that even if stdin is not
    connected to it.

  - Reverts f3cfb1b602.

  - Fixes #167.

src/sq.rs

@@ -7,7 +7,6 @@
 #![doc = include_str!(concat!(env!("OUT_DIR"), "/sq-usage.md"))]
 
 use anyhow::Context as _;
-use is_terminal::IsTerminal;
 
 use std::borrow::Borrow;
 use std::cell::OnceCell;
@@ -271,7 +270,6 @@ fn decrypt_key<R>(key: Key<key::SecretParts, R>, passwords: &mut Vec<Password>)
                 }
             }
 
-            if std::io::stdin().is_terminal() {
             loop {
                 // Prompt the user.
                 match common::password::prompt_to_unlock_or_cancel(&format!(
@@ -295,7 +293,6 @@ fn decrypt_key<R>(key: Key<key::SecretParts, R>, passwords: &mut Vec<Password>)
                     }
                 }
             }
-            }
 
             Err(anyhow::anyhow!("Key {}: Unable to decrypt secret key material",
                                 key.keyid().to_hex()))