Implement --omit-informal for `opentally convert`

src/cli/convert.rs

@@ -56,9 +56,13 @@ pub struct SubcmdOptions {
 	#[clap(help_heading=Some("PREFERENCE VALIDATION"), long)]
 	require_sequential: bool,
 	
-	/// Require strict ordering of preferences
+	/// Require strict ordering of preferences (disallow equal rankings)
 	#[clap(help_heading=Some("PREFERENCE VALIDATION"), long)]
 	require_strict_order: bool,
+	
+	/// Do not output wholly informal ballots
+	#[clap(help_heading=Some("PREFERENCE VALIDATION"), long)]
+	omit_informal: bool,
 }
 
 /// Entrypoint for subcommand
@@ -126,6 +130,11 @@ pub fn main(mut cmd_opts: SubcmdOptions) -> Result<(), i32> {
 		}
 	}
 	
+	if cmd_opts.omit_informal {
+		// Remove wholly informal ballots from output
+		election.ballots.retain(|b| !b.preferences.is_empty());
+	}
+	
 	// Write output file
 	let output = File::create(cmd_opts.outfile).expect("IO Error");