WIP on proc macro support

Author: syphar

src/docbuilder/rustwide_builder.rs

@@ -860,6 +860,16 @@ impl RustwideBuilder {
             return Ok(());
         }
 
+        // FIXME: support proc macro? just one time?
+        // let json_dir = if metadata.proc_macro {
+        //     let target_dir = build.host_target_dir();
+        //     let old_dir = target_dir.join("doc");
+        //     let new_dir = target_dir.join(target).join("doc");
+        //     debug!("rename {} to {}", old_dir.display(), new_dir.display());
+        //     std::fs::create_dir(target_dir.join(target))?;
+        //     std::fs::rename(old_dir, new_dir)?;
+        // };
+
         let Some(json_filename) = fs::read_dir(build.host_target_dir().join(target).join("doc"))?
             .filter_map(|entry| {
                 let entry = entry.ok()?;