fix(health): check if vim.g.rustaceanvim was set but not sourced

Author: Marc Jakobi

CHANGELOG.md

@@ -6,6 +6,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Health: Check if `vim.g.rustaceanvim` is set,
+  but hasn't been sourced before initialization.
+
 ## [3.7.1] - 2023-11-28
 
 ### Fixed

lua/rustaceanvim/config/internal.lua

@@ -247,6 +247,7 @@ local RustaceanDefaultConfig = {
       return should_enable_dap_config_value(RustaceanConfig.dap.adapter)
     end,
   },
+  was_g_rustaceanvim_sourced = vim.g.rustaceanvim ~= nil,
 }
 
 local rustaceanvim = vim.g.rustaceanvim or {}

lua/rustaceanvim/health.lua

@@ -180,10 +180,8 @@ end
 
 local function check_config()
   start('Checking config')
-  if vim.g.rustaceanvim then
-    ok('vim.g.rustaceanvim is set')
-  else
-    ok('vim.g.rustaceanvim is not set')
+  if vim.g.rustaceanvim and not config.was_g_rustaceanvim_sourced then
+    error('vim.g.rustaceanvim is set, but it was sourced after rustaceanvim was initialized.')
   end
   local valid, err = require('rustaceanvim.config.check').validate(config)
   if valid then