Fix handling of --option flag in Rust CLI

src/cli.rs

@@ -91,9 +91,9 @@ pub struct Cli {
     /// Set or override document class options.
     ///
     /// Can be used to change default options or override the ones specified in a document.
-    /// For example setting `--options papersize=letter` would override both the default `papersize` of A4 and any specific one set in the document’s options.
+    /// For example setting `--option papersize=letter` would override both the default `papersize` of A4 and any specific one set in the document’s options.
     /// May be specified more than once.
-    #[clap(short = 'O', long)]
+    #[clap(short = 'O', long, alias = "options")]
     pub option: Option<Vec<String>>,
 
     /// Include the contents of a SIL, XML, or other resource file before the input document content.

src/lib.rs

@@ -133,7 +133,15 @@ pub fn run(
         has_input_filename = true;
     }
     if let Some(options) = options {
-        sile_input.set("options", options)?;
+        // TODO: when mlua v0.10 merges, adapt this like the uses parsing to avoid chunking
+        for option in options.iter() {
+            let option = lua.create_string(option)?;
+            lua.load(chunk! {
+                local parameter = SILE.parserBits.parameters:match($option);
+                SILE.input.options = pl.tablex.merge(SILE.input.options, parameter, true)
+            })
+            .eval::<()>()?;
+        }
     }
     if let Some(modules) = uses {
         // let parser_bits: LuaTable = sile.get("parserBits")?;