Allow Lua plugins to inject all templates

README.md

@@ -36,7 +36,7 @@ The entry point is at `plugins/<name>/main.lua`.
 API:
 
 * `koushin.on_render(name, f)`: prior to rendering the template `name`, call
-  `f` with the template data
+  `f` with the template data (the special name `*` matches all templates)
 * `koushin.set_filter(name, f)`: set a template function
 * `koushin.set_route(method, path, f)`: register a new HTTP route, `f` will be
   called with the HTTP context

plugin_lua.go

@@ -68,7 +68,7 @@ func (p *luaPlugin) setRoute(l *lua.LState) int {
 	return 0
 }
 
-func (p *luaPlugin) Inject(name string, data interface{}) error {
+func (p *luaPlugin) inject(name string, data interface{}) error {
 	f, ok := p.renderCallbacks[name]
 	if !ok {
 		return nil
@@ -86,6 +86,13 @@ func (p *luaPlugin) Inject(name string, data interface{}) error {
 	return nil
 }
 
+func (p *luaPlugin) Inject(name string, data interface{}) error {
+	if err := p.inject("*", data); err != nil {
+		return err
+	}
+	return p.inject(name, data)
+}
+
 func (p *luaPlugin) LoadTemplate(t *template.Template) error {
 	t.Funcs(p.filters)