implement lua scripting

Inspired by the Scribunto extension for MediaWiki.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/get_routes.rs b/src/get_routes.rs
index 79b7cb5..5e65637 100644
--- a/src/get_routes.rs
+++ b/src/get_routes.rs
@@ -11,6 +11,7 @@ use hyper::http::request::Parts;
 use serde::Deserialize;
 use sputnik::html_escape;
 use sputnik::request::SputnikParts;
+use std::fmt::Write;
 use std::str::from_utf8;
 
 use crate::action_links;
@@ -80,6 +81,33 @@ fn view_blob<C: Controller>(
 
     match from_utf8(blob.content()) {
         Ok(text) => {
+            #[cfg(feature = "lua")]
+            if let Some(script) = super::lua::parse_shebang(text) {
+                match script.run(&ctx) {
+                    Ok(output) => {
+                        write!(
+                            page.body,
+                            "<div>rendered with <a href='{}'>{}</a></div>",
+                            html_escape(
+                                controller.build_url_path(&ctx.branch, &script.module_path())
+                            ),
+                            html_escape(script.lua_module_name)
+                        );
+                        page.body.push_str(&output);
+                    }
+                    Err(err) => {
+                        write!(
+                            page.body,
+                            "<div class=error><a href='{}'>{}</a>: {err}</div>",
+                            html_escape(
+                                controller.build_url_path(&ctx.branch, &script.module_path())
+                            ),
+                            html_escape(script.lua_module_name)
+                        );
+                    }
+                };
+                return Ok(page.into());
+            }
             if let Some(renderer) = get_renderer(&ctx.path) {
                 renderer(text, &mut page, RenderMode::View);
             } else {