Add command unpass to forget saved password for a specific name.

src/parser.rs

@@ -20,6 +20,7 @@ peg::parser! {
             / source_cmd()
             / enc_cmd()
             / pass_cmd()
+            / unpass_cmd()
             / noop_cmd()
             / comment_cmd()
         ) { c }
@@ -84,6 +85,7 @@ peg::parser! {
         rule error_cmd() -> Command<'input> = "error" _ e:$(([' '..='~'])+) { Command::Error(LKErr::Error(e)) }
         rule mv_cmd() -> Command<'input> = "mv" _ name:word() _ folder:word() { Command::Mv(name, folder) }
         rule pass_cmd() -> Command<'input> = "pass" _ name:word() { Command::Pass(name) }
+        rule unpass_cmd() -> Command<'input> = "unpass" _ name:word() { Command::UnPass(name) }
         rule enc_cmd() -> Command<'input> = "enc" _ name:word() { Command::Enc(name) }
         rule rm_cmd() -> Command<'input> = "rm" _ name:word() { Command::Rm(name) }
         rule comment_cmd() -> Command<'input> = "comment" _ name:word() c:comment()? { Command::Comment(name, c) }

src/repl.rs

@@ -314,6 +314,10 @@ impl<'a> LKEval<'a> {
                     }
                 }
             },
+            Command::UnPass(name) => match self.state.borrow_mut().secrets.remove(name) {
+                Some(_) => out.push(format!("Removed saved password for {}", name)),
+                None => out.push(format!("error: saved password for {} not found", name)),
+            }
             Command::Noop => (),
             Command::Help => {
                 out.push("HELP".to_string());

src/structs.rs

@@ -36,6 +36,7 @@ pub enum Command<'a> {
     Rm(Name),
     Enc(Name),
     Pass(Name),
+    UnPass(Name),
     PasteBuffer(String),
     Source(String),
     Comment(Name, Comment),