Problem:
emmylua reports `unresolved-require` for `require('test.testutil')` and
friends, and a file under `test/` cannot even resolve its own siblings.
This happens because `test/.emmyrc.json` and `test/.luarc.json`, cause
vim.lsp to root the workspace at `test/` instead of the repo top-level.
Solution:
Drop the nested configs:
src/.luarc.json
test/.luarc.json
test/.emmyrc.json
Outcomes:
- No "libraries" needed: luv types come from `runtime/lua/uv/_meta.lua`,
not `${3rd}/luv` (which would only duplicate them).
- Drop `test/` from the root `.luarc.json` `ignoreDir` so its modules are
resolvable by LuaLS/Emmylua.
- Note: this means that LuaLS diagnostics will now be reported for
`test/`, but that is not a bad thing...
Problem:
When using the default `lua_ls` config from nvim-lspconfig, the following info message gets printed:
```
LSP[lua_ls] Too large file: src/nvim/eval.lua skipped. The currently set size limit is: 500 KB, and the file size is: 511.133 KB.
```
Solution:
Set `workspace.preloadFileSize` to 1000 KB instead of the default 500 KB.
Replace the busted-based Lua test runner with a repo-local harness.
The new harness runs spec files directly under `nvim -ll`, ships its own
reporter and lightweight `luassert` shim, and keeps the helper/preload
flow used by the functional and unit test suites.
Keep the file boundary model shallow and busted-like by restoring `_G`,
`package.loaded`, `package.preload`, `arg`, and the process environment
between files, without carrying extra reset APIs or custom assertion
machinery.
Update the build and test entrypoints to use the new runner, add
black-box coverage for the harness itself, and drop the bundled
busted/luacheck dependency path.
AI-assisted: Codex
Problem: Transpiled Lua code from vim9script is not amenable to static
analysis, requiring manual cleanup or ignoring parts of our codebase.
Solution: Revert to pre-rewrite version of (low-impact) legacy plugins
and remove the vim9jit shim.
Problem: No type information for `vim.uv`.
Solution: Vendor https://github.com/LuaCATS/luv (which is what
luals bundles). This will allow other tooling to work out-of-the-box and
make these files available to users and plugins without the need for
`lazydev.nvim` etc.
