style(setup): apply stylua formatting

Problem: cp.nvim exposed no documentation showing how to integrate its
runtime state into a statusline. Users had to discover the state module
API by reading source.

Solution: add a STATUSLINE INTEGRATION section to the vimdoc with a
state API reference and recipes for vanilla statusline, lualine, and
heirline. Also anchors the *cp.State* help tag referenced in prose
elsewhere in the doc.

.luarc.json

@@ -1,8 +1,16 @@
 {
-  "runtime.version": "LuaJIT",
-  "runtime.path": ["lua/?.lua", "lua/?/init.lua"],
-  "diagnostics.globals": ["vim"],
-  "workspace.library": ["$VIMRUNTIME/lua", "${3rd}/luv/library"],
-  "workspace.checkThirdParty": false,
-  "completion.callSnippet": "Replace"
+  "runtime": {
+    "version": "LuaJIT",
+    "path": ["lua/?.lua", "lua/?/init.lua"]
+  },
+  "diagnostics": {
+    "globals": ["vim"]
+  },
+  "workspace": {
+    "library": ["$VIMRUNTIME/lua", "${3rd}/luv/library", "${3rd}/busted/library"],
+    "checkThirdParty": false
+  },
+  "completion": {
+    "callSnippet": "Replace"
+  }
 }

doc/cp.nvim.txt

@@ -888,6 +888,116 @@ Functions ~
         Parameters: ~
             {bufnr}  (integer) Buffer handle
 
+==============================================================================
+STATUSLINE INTEGRATION                                        *cp-statusline*
+
+cp.nvim exposes its runtime state through a public module that can be queried
+from any statusline plugin. Import it with: >lua
+    local state = require('cp.state')
+<
+All getters return nil when no problem is active, so guard every value before
+use. Calling any getter outside a CP context is safe and has no side effects.
+
+State API ~
+                                                                  *cp.State*
+The following getters are available for statusline use:
+
+    get_platform()      (string?) Platform id. e.g. "codeforces", "atcoder"
+    get_contest_id()    (string?) Contest id. e.g. "1933", "abc324"
+    get_problem_id()    (string?) Problem id. e.g. "A", "B"
+    get_language()      (string?) Language id. e.g. "cpp", "python"
+    get_base_name()     (string?) Derived filename stem. e.g. "1933a"
+    get_source_file()   (string?) Full source filename. e.g. "1933a.cc"
+    get_active_panel()  (string?) Non-nil when the test panel is open.
+
+Recipe: vanilla statusline ~
+
+Set vim.o.statusline from an autocommand so it is recalculated on every
+BufEnter: >lua
+    local function cp_component()
+      local state = require('cp.state')
+      local platform = state.get_platform()
+      if not platform then
+        return ''
+      end
+      local parts = {
+        platform,
+        state.get_contest_id(),
+        state.get_problem_id(),
+        state.get_language(),
+      }
+      local filtered = {}
+      for _, v in ipairs(parts) do
+        if v then filtered[#filtered + 1] = v end
+      end
+      return '[' .. table.concat(filtered, ' · ') .. ']'
+    end
+
+    vim.api.nvim_create_autocmd({ 'BufEnter', 'User' }, {
+      callback = function()
+        vim.o.statusline = cp_component() .. ' %f %=%l:%c'
+      end
+    })
+<
+
+Recipe: lualine ~
+
+Add a custom component to any lualine section. The cond field hides the
+component entirely when no problem is active: >lua
+    local function cp_lualine()
+      local state = require('cp.state')
+      local parts = {
+        state.get_platform(),
+        state.get_contest_id(),
+        state.get_problem_id(),
+        state.get_language(),
+      }
+      local filtered = {}
+      for _, v in ipairs(parts) do
+        if v then filtered[#filtered + 1] = v end
+      end
+      return table.concat(filtered, ' · ')
+    end
+
+    require('lualine').setup({
+      sections = {
+        lualine_c = {
+          {
+            cp_lualine,
+            cond = function()
+              return require('cp.state').get_platform() ~= nil
+            end,
+          },
+        },
+      },
+    })
+<
+
+Recipe: heirline ~
+
+Build a heirline component using a provider and condition: >lua
+    local CpComponent = {
+      condition = function()
+        return require('cp.state').get_platform() ~= nil
+      end,
+      provider = function()
+        local state = require('cp.state')
+        local parts = {
+          state.get_platform(),
+          state.get_contest_id(),
+          state.get_problem_id(),
+          state.get_language(),
+        }
+        local filtered = {}
+        for _, v in ipairs(parts) do
+          if v then filtered[#filtered + 1] = v end
+        end
+        return '[' .. table.concat(filtered, ' · ') .. ']'
+      end,
+    }
+<
+Include CpComponent in your heirline StatusLine spec wherever desired.
+
 ==============================================================================
 PANEL KEYMAPS                                                  *cp-panel-keys*
 

lua/cp/cache.lua

@@ -346,6 +346,8 @@ function M.get_data_pretty()
   return vim.inspect(cache_data)
 end
 
-M._cache = cache_data
+function M.get_raw_cache()
+  return cache_data
+end
 
 return M

lua/cp/health.lua

@@ -13,7 +13,7 @@ local function check()
     vim.health.error('cp.nvim requires Neovim 0.10.0+')
   end
 
-  local uname = vim.loop.os_uname()
+  local uname = vim.uv.os_uname()
   if uname.sysname == 'Windows_NT' then
     vim.health.error('Windows is not supported')
   end

lua/cp/runner/run.lua

@@ -276,10 +276,9 @@ function M.run_all_test_cases(indices, debug, on_each, on_done)
     end
   end
 
-  local function run_next(pos)
-    if pos > #to_run then
+  if #to_run == 0 then
     logger.log(
-        ('Finished %s %d test cases.'):format(debug and 'debugging' or 'running', #to_run),
+      ('Finished %s %d test cases.'):format(debug and 'debugging' or 'running', 0),
       vim.log.levels.INFO,
       true
     )
@@ -287,15 +286,25 @@ function M.run_all_test_cases(indices, debug, on_each, on_done)
     return
   end
 
-    M.run_test_case(to_run[pos], debug, function()
+  local total = #to_run
+  local remaining = total
+
+  for _, idx in ipairs(to_run) do
+    M.run_test_case(idx, debug, function()
       if on_each then
-        on_each(pos, #to_run)
+        on_each(idx, total)
+      end
+      remaining = remaining - 1
+      if remaining == 0 then
+        logger.log(
+          ('Finished %s %d test cases.'):format(debug and 'debugging' or 'running', total),
+          vim.log.levels.INFO,
+          true
+        )
+        on_done(panel_state.test_cases)
       end
-      run_next(pos + 1)
     end)
   end
-
-  run_next(1)
 end
 
 ---@return PanelState

lua/cp/scraper.lua

@@ -57,7 +57,7 @@ local function run_scraper(platform, subcommand, args, opts)
   env.CONDA_PREFIX = ''
 
   if opts and opts.ndjson then
-    local uv = vim.loop
+    local uv = vim.uv
     local stdout = uv.new_pipe(false)
     local stderr = uv.new_pipe(false)
     local buf = ''

lua/cp/setup.lua

@@ -10,17 +10,13 @@ local state = require('cp.state')
 
 local function apply_template(bufnr, lang_id, platform)
   local config = config_module.get_config()
-  local eff = config.runtime.effective[platform]
-    and config.runtime.effective[platform][lang_id]
+  local eff = config.runtime.effective[platform] and config.runtime.effective[platform][lang_id]
   if not eff or not eff.template then
     return
   end
   local path = vim.fn.expand(eff.template)
   if vim.fn.filereadable(path) ~= 1 then
-    logger.log(
-      ('[cp.nvim] template not readable: %s'):format(path),
-      vim.log.levels.WARN
-    )
+    logger.log(('[cp.nvim] template not readable: %s'):format(path), vim.log.levels.WARN)
     return
   end
   local lines = vim.fn.readfile(path)
@@ -198,7 +194,7 @@ function M.setup_contest(platform, contest_id, problem_id, language)
       contest_id = contest_id,
       language = lang,
       requested_problem_id = problem_id,
-      token = vim.loop.hrtime(),
+      token = vim.uv.hrtime(),
     })
 
     logger.log('Fetching contests problems...', vim.log.levels.INFO, true)

lua/cp/utils.lua

@@ -5,7 +5,7 @@ local logger = require('cp.log')
 local _nix_python = nil
 local _nix_discovered = false
 
-local uname = vim.loop.os_uname()
+local uname = vim.uv.os_uname()
 
 local _time_cached = false
 local _time_path = nil
@@ -336,7 +336,7 @@ function M.timeout_capability()
 end
 
 function M.cwd_executables()
-  local uv = vim.uv or vim.loop
+  local uv = vim.uv
   local req = uv.fs_scandir('.')
   if not req then
     return {}