Lepiter snippet completions don't include module imports until first eval

[mariari]

Problem

The Lepiter snippet at the bottom of the inspector (pre-bound to self) doesn't have module imports loaded for completions until after the first evaluation. Typing changeset shows no completions; after evaluating anything (Do It), changeset/2 appears.

Cause

The module coder uses GtBridge.Analysis.editor_session/2 to preload imports into the eval session env. The Lepiter snippet uses a different session that starts with an empty env. Imports are only added at eval time via GtElixirCoderModel >> wrapSource:withSelf: which prepends import Module.

Fix

When the snippet's self object is set (LeElixirSnippetViewModel >> inspectorSelfObject:), trigger an editor_session call for the self object's module to preload the session env. This requires knowing the session ID at self-object-set time, which touches the Lepiter snippet lifecycle.

Related

Fixed for module coders in mariari/editor-session-self-import — editor_session/2 now imports the module's own functions at session creation time.

[mariari]

Investigation Findings

The root cause: the completion strategy's eval session must be created by the HTTP handler (which provides the port for async result callbacks). But the import preloading needs to happen before the first eval.

Current workaround (shipped)

GtElixirCompletionStrategy >> ensureSessionImports retries on each keypress via preload_imports/2 (which only modifies existing sessions, never creates). The first keypress creates the session via /COMPLETE's resolve_eval. The second keypress finds the session and loads imports. Result: imports available from second character typed.

Principled fix: /INIT_SESSION endpoint

A dedicated HTTP endpoint that creates the session (with port from the HTTP connection) AND loads module imports in one request:

post "/INIT_SESSION" do
  body = conn.body_params
  session_id = body["sessionId"]
  mod_str = body["module"]
  port = conn.assigns.pharo_client
  EvalRegistry.get_or_create(session_id, port: port)
  if mod_str do
    mod = String.to_atom(mod_str)
    GtBridge.Analysis.preload_imports(mod, session_id)
  end
  send_resp(200, "{}")
end

Smalltalk side: LeElixirSnippetElement >> preloadSessionImportsFor: sends one HTTP POST to /INIT_SESSION with sessionId + module name when the element is wired up. No retries, first keypress, clean separation of concerns.