Readd external-to-ref pass when wrapping with axi.

This ensures output calyx files are valid (otherwise we might pass in
concrete cells to non-ref cells). Also sticking with the more complex
sed which removes everything until the first `component main` line,
as opposed to just removing `^import` lines to avoid polluting files with
`external` blocks

fud2/scripts/axi.rhai

@@ -18,10 +18,9 @@ op(
     },
 );
 
-export let wrapper_setup = wrapper_setup;
 fn wrapper_setup(e) {
     // Define a `gen-axi` rule that invokes our Python code generator program.
-    // For now point to standalone axi_generator.py. Can maybe turn this into a rsrc file?
+    // For now point to standalone axi-generator.py. Can maybe turn this into a rsrc file?
     let dynamic =
         e.config_constrained_or("dynamic", ["true", "false"], "false");
     let generator_path = if dynamic == "true" {
@@ -37,9 +36,11 @@ fn wrapper_setup(e) {
     // Define a simple `combine` rule that just concatenates any numer of files.
     e.rule("combine", "cat $in > $out");
 
+    // Removes imports and `external` primitive blocks added by passes by removing
+    // everything up until the first line containing `component main`
     e.rule(
         "remove-imports",
-        "sed '/^import/d' $in > $out",
+        "sed '1,/component main/{/component main/!d; }' $in > $out",
     );
 }
 
@@ -52,17 +53,22 @@ fn replace_ext(path, new_ext) {
       return `${path}.${new_ext}`;
    }
 }
+
 fn axi_wrapped_op(e, input, output) {
    let file_name = input.split("/")[-1];
    let tmp_yxi = replace_ext(file_name, "yxi");
 
    e.build_cmd([tmp_yxi], "yxi", [input], []);
 
+   let refified_calyx = replace_ext(`refified_${file_name}`, "futil");
+   e.build_cmd([refified_calyx], "calyx-pass", [input], []);
+   e.arg("pass", "external-to-ref");
+
    let axi_wrapper = "axi_wrapper.futil";
    e.build_cmd([axi_wrapper], "gen-axi", [tmp_yxi], []);
 
-   let no_imports_calyx = `no_imports_${file_name}`;
-   e.build_cmd([no_imports_calyx], "remove-imports", [input], []);
+   let no_imports_calyx = `no_imports_${refified_calyx}`;
+   e.build_cmd([no_imports_calyx], "remove-imports", [refified_calyx], []);
 
    e.build_cmd([output], "combine", [axi_wrapper, no_imports_calyx], []);
 }