feat: add scripts for .luarc.json

.gitignore

@@ -1,2 +1,3 @@
 todo.norg
 .libraries/
+.luarc.json

CONTRIBUTING.md

@@ -32,3 +32,9 @@ You can get third party libraries for type annotations by doing
 ```bash
 make install_libraries
 ```
+
+Then use
+```bash
+bash scripts/write_luarc.sh
+```
+from the root directory of this repo to generate a `.luarc.json` file to configure luals to use the type annotations.

scripts/write_luarc.lua

@@ -0,0 +1,37 @@
+local function tofile(fname, text)
+    local f = io.open(fname, "w")
+    if not f then
+        error(("failed to write: %s"):format(f))
+    else
+        print(("Written to: %s"):format(fname))
+        f:write(text)
+        f:close()
+    end
+end
+
+local out = nil
+local i = 1
+while i <= #_G.arg do
+    if _G.arg[i] == "--out" then
+        out = assert(_G.arg[i + 1], "--out <outfile> needed")
+        i = i + 1
+    end
+    i = i + 1
+end
+
+local libraries = {
+    [["./.libraries/busted/library/"]],
+    [["./.libraries/luassert/library/"]],
+    [["./.libraries/luv/library/"]],
+    '"' .. vim.fn.expand("$VIMRUNTIME" .. "/lua", false, true)[1] .. '"',
+}
+
+local lines = {
+    "{",
+    [[  "$schema": "https://raw.githubusercontent.com/LuaLS/vscode-lua/master/setting/schema.json",]],
+    [[  "runtime.version": "LuaJIT",]],
+}
+table.insert(lines, '  "workspace.library": [\n    ' .. table.concat(libraries, ",\n    ") .. "\n  ]")
+table.insert(lines, "}")
+
+tofile(out, table.concat(lines, "\n"))

scripts/write_luarc.sh

@@ -0,0 +1,3 @@
+#!/bin/env bash
+
+nvim --headless --clean -l scripts/write_luarc.lua --out .luarc.json