Scout APM instrumentation for Phoenix HEEx templates (.heex files).

This engine wraps Phoenix.LiveView.HTMLEngine to provide automatic timing instrumentation for HEEx template rendering.

Requirements

• Phoenix LiveView 0.17+
• Phoenix 1.6+

Configuration

Add to your config/config.exs:

config :phoenix, :template_engines,
  heex: ScoutApm.Instruments.HEExEngine

The engine will automatically instrument all .heex template files in your application.

Notes

• This module is only compiled when Phoenix.LiveView.HTMLEngine is available
• Layout templates are marked as non-scopable to prevent them from becoming transaction names
• Compatible with both Phoenix 1.6 (web/templates) and 1.7+ (lib/my_app_web/controllers) directory structures