flake.nix

@@ -26,20 +26,6 @@
           ps.requests
         ]);
 
-      mkDevPythonEnv =
-        pkgs:
-        pkgs.python312.withPackages (ps: [
-          ps.backoff
-          ps.beautifulsoup4
-          ps.curl-cffi
-          ps.httpx
-          ps.ndjson
-          ps.pydantic
-          ps.requests
-          ps.pytest
-          ps.pytest-mock
-        ]);
-
       mkSubmitEnv =
         pkgs:
         pkgs.buildFHSEnv {
@@ -58,24 +44,19 @@
               glib
               gtk3
               libdrm
+              libGL
               libxkbcommon
               mesa
-              libGL
               nspr
               nss
               pango
-              libx11
+              xorg.libX11
-              libxcomposite
+              xorg.libXcomposite
-              libxdamage
+              xorg.libXdamage
-              libxext
+              xorg.libXext
-              libxfixes
+              xorg.libXfixes
-              libxrandr
+              xorg.libXrandr
-              libxcb
+              xorg.libxcb
-              at-spi2-core
-              expat
-              libgbm
-              systemdLibs
-              zlib
             ];
           runScript = "${pkgs.uv}/bin/uv";
         };
@@ -119,19 +100,15 @@
         submitEnv = mkSubmitEnv (pkgsFor system);
       });
 
-      formatter = eachSystem (system: (pkgsFor system).nixfmt-tree);
-
       devShells = eachSystem (system: {
         default = (pkgsFor system).mkShell {
           packages = with (pkgsFor system); [
             uv
-            (mkDevPythonEnv (pkgsFor system))
+            python312
             prettier
-            ruff
             stylua
             selene
             lua-language-server
-            ty
           ];
         };
       });

lua/cp/scraper.lua

@@ -44,10 +44,6 @@ local function run_scraper(platform, subcommand, args, opts)
     return { success = false, error = msg }
   end
 
-  if subcommand == 'submit' then
-    utils.setup_nix_submit_env()
-  end
-
   local plugin_path = utils.get_plugin_path()
   local cmd
   if subcommand == 'submit' then
@@ -77,10 +73,6 @@ local function run_scraper(platform, subcommand, args, opts)
 
   if opts and opts.ndjson then
     local uv = vim.uv
-    local stdin_pipe = nil
-    if opts.stdin then
-      stdin_pipe = uv.new_pipe(false)
-    end
     local stdout = uv.new_pipe(false)
     local stderr = uv.new_pipe(false)
     local buf = ''
@@ -88,7 +80,7 @@ local function run_scraper(platform, subcommand, args, opts)
     local handle
     handle = uv.spawn(cmd[1], {
       args = vim.list_slice(cmd, 2),
-      stdio = { stdin_pipe, stdout, stderr },
+      stdio = { nil, stdout, stderr },
       env = spawn_env_list(env),
       cwd = plugin_path,
     }, function(code, signal)
@@ -102,9 +94,6 @@ local function run_scraper(platform, subcommand, args, opts)
       if opts.on_exit then
         opts.on_exit({ success = (code == 0), code = code, signal = signal })
       end
-      if stdin_pipe and not stdin_pipe:is_closing() then
-        stdin_pipe:close()
-      end
       if not stdout:is_closing() then
         stdout:close()
       end
@@ -117,21 +106,10 @@ local function run_scraper(platform, subcommand, args, opts)
     end)
 
     if not handle then
-      if stdin_pipe and not stdin_pipe:is_closing() then
-        stdin_pipe:close()
-      end
       logger.log('Failed to start scraper process', vim.log.levels.ERROR)
       return { success = false, error = 'spawn failed' }
     end
 
-    if stdin_pipe then
-      uv.write(stdin_pipe, opts.stdin, function()
-        uv.shutdown(stdin_pipe, function()
-          stdin_pipe:close()
-        end)
-      end)
-    end
-
     uv.read_start(stdout, function(_, data)
       if data == nil then
         if buf ~= '' and opts.on_event then
@@ -282,39 +260,18 @@ function M.scrape_all_tests(platform, contest_id, callback)
   })
 end
 
-function M.submit(
+function M.submit(platform, contest_id, problem_id, language, source_code, credentials, callback)
-  platform,
+  local creds_json = vim.json.encode(credentials)
-  contest_id,
-  problem_id,
-  language,
-  source_code,
-  credentials,
-  on_status,
-  callback
-)
-  local done = false
   run_scraper(platform, 'submit', { contest_id, problem_id, language }, {
-    ndjson = true,
     stdin = source_code,
-    env_extra = { CP_CREDENTIALS = vim.json.encode(credentials) },
+    env_extra = { CP_CREDENTIALS = creds_json },
-    on_event = function(ev)
+    on_exit = function(result)
-      if ev.status ~= nil then
+      if type(callback) == 'function' then
-        if type(on_status) == 'function' then
+        if result and result.success then
-          on_status(ev.status)
+          callback(result.data or { success = true })
+        else
+          callback({ success = false, error = result and result.error or 'unknown' })
         end
-      elseif ev.success ~= nil then
-        done = true
-        if type(callback) == 'function' then
-          callback(ev)
-        end
-      end
-    end,
-    on_exit = function(proc)
-      if not done and type(callback) == 'function' then
-        callback({
-          success = false,
-          error = 'submit process exited (code=' .. tostring(proc.code) .. ')',
-        })
       end
     end,
   })

lua/cp/submit.lua

@@ -4,13 +4,6 @@ local cache = require('cp.cache')
 local logger = require('cp.log')
 local state = require('cp.state')
 
-local STATUS_MSGS = {
-  installing_browser = 'Installing browser (first time setup)...',
-  checking_login = 'Checking login...',
-  logging_in = 'Logging in...',
-  submitting = 'Submitting...',
-}
-
 local function prompt_credentials(platform, callback)
   local saved = cache.get_credentials(platform)
   if saved and saved.username and saved.password then
@@ -55,8 +48,6 @@ function M.submit(opts)
     local source_lines = vim.fn.readfile(source_file)
     local source_code = table.concat(source_lines, '\n')
 
-    vim.notify('[cp.nvim] Submitting...', vim.log.levels.INFO)
-
     require('cp.scraper').submit(
       platform,
       contest_id,
@@ -64,11 +55,6 @@ function M.submit(opts)
       language,
       source_code,
       creds,
-      function(status)
-        vim.schedule(function()
-          vim.notify('[cp.nvim] ' .. (STATUS_MSGS[status] or status), vim.log.levels.INFO)
-        end)
-      end,
       function(result)
         vim.schedule(function()
           if result and result.success then

lua/cp/utils.lua

@@ -119,76 +119,10 @@ function M.get_python_submit_cmd(module, plugin_path)
   if _nix_submit_cmd then
     return { _nix_submit_cmd, 'run', '--directory', plugin_path, '-m', 'scrapers.' .. module }
   end
-  return { 'uv', 'run', '--directory', plugin_path, '-m', 'scrapers.' .. module }
+  return M.get_python_cmd(module, plugin_path)
 end
 
 local python_env_setup = false
-local _nix_submit_attempted = false
-
----@return boolean
-local function discover_nix_submit_cmd()
-  local cache_dir = vim.fn.stdpath('cache') .. '/cp-nvim'
-  local cache_file = cache_dir .. '/nix-submit'
-
-  local f = io.open(cache_file, 'r')
-  if f then
-    local cached = f:read('*l')
-    f:close()
-    if cached and vim.fn.executable(cached) == 1 then
-      _nix_submit_cmd = cached
-      return true
-    end
-  end
-
-  local plugin_path = M.get_plugin_path()
-  vim.cmd.redraw()
-  vim.notify('Building submit environment...', vim.log.levels.INFO)
-  vim.cmd.redraw()
-  local result = vim
-    .system(
-      { 'nix', 'build', plugin_path .. '#submitEnv', '--no-link', '--print-out-paths' },
-      { text = true }
-    )
-    :wait()
-
-  if result.code ~= 0 then
-    logger.log('nix build #submitEnv failed: ' .. (result.stderr or ''), vim.log.levels.WARN)
-    return false
-  end
-
-  local store_path = result.stdout:gsub('%s+$', '')
-  local submit_cmd = store_path .. '/bin/cp-nvim-submit'
-
-  if vim.fn.executable(submit_cmd) ~= 1 then
-    logger.log('nix submit cmd not executable at ' .. submit_cmd, vim.log.levels.WARN)
-    return false
-  end
-
-  vim.fn.mkdir(cache_dir, 'p')
-  f = io.open(cache_file, 'w')
-  if f then
-    f:write(submit_cmd)
-    f:close()
-  end
-
-  _nix_submit_cmd = submit_cmd
-  return true
-end
-
----@return boolean
-function M.setup_nix_submit_env()
-  if _nix_submit_cmd then
-    return true
-  end
-  if _nix_submit_attempted then
-    return false
-  end
-  _nix_submit_attempted = true
-  if vim.fn.executable('nix') == 1 then
-    return discover_nix_submit_cmd()
-  end
-  return false
-end
 
 ---@return boolean
 local function discover_nix_python()

pyproject.toml

@@ -7,7 +7,7 @@ requires-python = ">=3.11"
 dependencies = [
     "backoff>=2.2.1",
     "beautifulsoup4>=4.13.5",
-    "scrapling[fetchers]>=0.4",
+    "camoufox[geoip]",
     "curl-cffi>=0.13.0",
     "httpx>=0.28.1",
     "ndjson>=0.3.1",

scrapers/atcoder.py

@@ -4,9 +4,7 @@ import asyncio
 import json
 import os
 import re
-import subprocess
 import sys
-import tempfile
 import time
 from typing import Any
 
@@ -235,183 +233,6 @@ def _extract_samples(html: str) -> list[TestCase]:
     return cases
 
 
-_TURNSTILE_JS = "() => { const el = document.querySelector('[name=\"cf-turnstile-response\"]'); return el && el.value.length > 0; }"
-
-
-def _solve_turnstile(page) -> None:
-    for _ in range(6):
-        has_token = page.evaluate(_TURNSTILE_JS)
-        if has_token:
-            return
-        try:
-            box = page.locator(
-                'iframe[src*="challenges.cloudflare.com"]'
-            ).first.bounding_box()
-            if box:
-                page.mouse.click(
-                    box["x"] + box["width"] * 0.15,
-                    box["y"] + box["height"] * 0.5,
-                )
-        except Exception:
-            pass
-        try:
-            page.wait_for_function(_TURNSTILE_JS, timeout=5000)
-            return
-        except Exception:
-            pass
-    raise RuntimeError("Turnstile not solved after multiple attempts")
-
-
-def _ensure_browser() -> None:
-    try:
-        from patchright._impl._driver import compute_driver_executable  # type: ignore[import-untyped,unresolved-import]
-
-        node, cli = compute_driver_executable()
-        browser_info = subprocess.run(
-            [node, cli, "install", "--dry-run", "chromium"],
-            capture_output=True,
-            text=True,
-        )
-        for line in browser_info.stdout.splitlines():
-            if "Install location:" in line:
-                install_dir = line.split(":", 1)[1].strip()
-                if not os.path.isdir(install_dir):
-                    print(json.dumps({"status": "installing_browser"}), flush=True)
-                    subprocess.run(
-                        [node, cli, "install", "chromium"],
-                        check=True,
-                    )
-                break
-    except Exception:
-        pass
-
-
-def _submit_headless(
-    contest_id: str,
-    problem_id: str,
-    source_code: str,
-    language_id: str,
-    credentials: dict[str, str],
-) -> "SubmitResult":
-    from pathlib import Path
-
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        return SubmitResult(
-            success=False,
-            error="scrapling is required for AtCoder submit. Install it: uv add 'scrapling[fetchers]>=0.4'",
-        )
-
-    _ensure_browser()
-
-    cookie_cache = Path.home() / ".cache" / "cp-nvim" / "atcoder-cookies.json"
-    cookie_cache.parent.mkdir(parents=True, exist_ok=True)
-    saved_cookies: list[dict[str, Any]] = []
-    if cookie_cache.exists():
-        try:
-            saved_cookies = json.loads(cookie_cache.read_text())
-        except Exception:
-            pass
-
-    logged_in = False
-    login_error: str | None = None
-    submit_error: str | None = None
-
-    def check_login(page):
-        nonlocal logged_in
-        logged_in = page.evaluate(
-            "() => Array.from(document.querySelectorAll('a')).some(a => a.textContent.trim() === 'Sign Out')"
-        )
-
-    def login_action(page):
-        nonlocal login_error
-        try:
-            _solve_turnstile(page)
-            page.fill('input[name="username"]', credentials.get("username", ""))
-            page.fill('input[name="password"]', credentials.get("password", ""))
-            page.click("#submit")
-            page.wait_for_url(lambda url: "/login" not in url, timeout=60000)
-        except Exception as e:
-            login_error = str(e)
-
-    def submit_action(page):
-        nonlocal submit_error
-        try:
-            _solve_turnstile(page)
-            page.select_option(
-                'select[name="data.TaskScreenName"]',
-                f"{contest_id}_{problem_id}",
-            )
-            page.locator(
-                f'select[name="data.LanguageId"] option[value="{language_id}"]'
-            ).wait_for(state="attached", timeout=15000)
-            page.select_option('select[name="data.LanguageId"]', language_id)
-            with tempfile.NamedTemporaryFile(
-                mode="w", suffix=".cpp", delete=False, prefix="atcoder_"
-            ) as tf:
-                tf.write(source_code)
-                tmp_path = tf.name
-            try:
-                page.set_input_files("#input-open-file", tmp_path)
-                page.wait_for_timeout(500)
-            finally:
-                os.unlink(tmp_path)
-            page.locator('button[type="submit"]').click()
-            page.wait_for_url(lambda url: "/submissions/me" in url, timeout=60000)
-        except Exception as e:
-            submit_error = str(e)
-
-    try:
-        with StealthySession(
-            headless=True,
-            timeout=60000,
-            google_search=False,
-            cookies=saved_cookies,
-        ) as session:
-            print(json.dumps({"status": "checking_login"}), flush=True)
-            session.fetch(
-                f"{BASE_URL}/home",
-                page_action=check_login,
-                network_idle=True,
-            )
-
-            if not logged_in:
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                session.fetch(
-                    f"{BASE_URL}/login",
-                    page_action=login_action,
-                    solve_cloudflare=True,
-                )
-                if login_error:
-                    return SubmitResult(
-                        success=False, error=f"Login failed: {login_error}"
-                    )
-
-            print(json.dumps({"status": "submitting"}), flush=True)
-            session.fetch(
-                f"{BASE_URL}/contests/{contest_id}/submit",
-                page_action=submit_action,
-                solve_cloudflare=True,
-            )
-
-            try:
-                browser_cookies = session.context.cookies()
-                if any(c["name"] == "REVEL_SESSION" for c in browser_cookies):
-                    cookie_cache.write_text(json.dumps(browser_cookies))
-            except Exception:
-                pass
-
-            if submit_error:
-                return SubmitResult(success=False, error=submit_error)
-
-            return SubmitResult(
-                success=True, error="", submission_id="", verdict="submitted"
-            )
-    except Exception as e:
-        return SubmitResult(success=False, error=str(e))
-
-
 def _scrape_tasks_sync(contest_id: str) -> list[dict[str, str]]:
     html = _fetch(f"{BASE_URL}/contests/{contest_id}/tasks")
     return _parse_tasks_list(html)
@@ -558,14 +379,83 @@ class AtcoderScraper(BaseScraper):
         language_id: str,
         credentials: dict[str, str],
     ) -> SubmitResult:
-        return await asyncio.to_thread(
+        def _submit_sync() -> SubmitResult:
-            _submit_headless,
+            try:
-            contest_id,
+                from camoufox.sync_api import Camoufox
-            problem_id,
+            except ImportError:
-            source_code,
+                return SubmitResult(
-            language_id,
+                    success=False,
-            credentials,
+                    error="camoufox is required for AtCoder login. Install it: uv add 'camoufox[geoip]'",
-        )
+                )
+
+            from curl_cffi import requests as curl_requests
+
+            try:
+                with Camoufox(headless=True) as browser:
+                    page = browser.new_page()
+                    page.goto(f"{BASE_URL}/login", wait_until="domcontentloaded")
+                    page.wait_for_load_state("networkidle")
+                    page.fill('input[name="username"]', credentials.get("username", ""))
+                    page.fill('input[name="password"]', credentials.get("password", ""))
+                    page.click('#submit')
+                    page.wait_for_url(lambda url: "/login" not in url, timeout=30000)
+                    cookies = page.context.cookies()
+
+                session = curl_requests.Session(impersonate="chrome")
+                for cookie in cookies:
+                    session.cookies.set(
+                        cookie["name"],
+                        cookie["value"],
+                        domain=cookie.get("domain", ""),
+                    )
+
+                submit_page = session.get(
+                    f"{BASE_URL}/contests/{contest_id}/submit",
+                    timeout=TIMEOUT_SECONDS,
+                )
+                submit_page.raise_for_status()
+                soup = BeautifulSoup(submit_page.text, "html.parser")
+                csrf_input = soup.find("input", {"name": "csrf_token"})
+                if not csrf_input or not hasattr(csrf_input, "get"):
+                    return SubmitResult(
+                        success=False, error="Could not find CSRF token on submit page"
+                    )
+                csrf_token = csrf_input.get("value", "") or ""  # type: ignore[union-attr]
+
+                task_screen_name = f"{contest_id}_{problem_id}"
+                submit_resp = session.post(
+                    f"{BASE_URL}/contests/{contest_id}/submit",
+                    data={
+                        "data.TaskScreenName": task_screen_name,
+                        "data.LanguageId": language_id,
+                        "sourceCode": source_code,
+                        "csrf_token": csrf_token,
+                    },
+                    timeout=TIMEOUT_SECONDS,
+                    allow_redirects=False,
+                )
+                if submit_resp.status_code in (301, 302):
+                    location = submit_resp.headers.get("Location", "")
+                    if "/submissions/me" in location:
+                        return SubmitResult(
+                            success=True,
+                            error="",
+                            submission_id="",
+                            verdict="submitted",
+                        )
+                    return SubmitResult(
+                        success=False,
+                        error=f"Submit may have failed: redirected to {location}",
+                    )
+                submit_resp.raise_for_status()
+                return SubmitResult(
+                    success=False,
+                    error="Unexpected response from submit (expected redirect)",
+                )
+            except Exception as e:
+                return SubmitResult(success=False, error=str(e))
+
+        return await asyncio.to_thread(_submit_sync)
 
 
 async def main_async() -> int:

scrapers/language_ids.py

@@ -1,7 +1,7 @@
 LANGUAGE_IDS = {
     "atcoder": {
-        "cpp": "6017",
+        "cpp": "5028",
-        "python": "6082",
+        "python": "5078",
     },
     "codeforces": {
         "cpp": "89",

scripts/ci.sh

@@ -4,10 +4,8 @@ set -eu
 nix develop --command stylua --check .
 git ls-files '*.lua' | xargs nix develop --command selene --display-style quiet
 nix develop --command prettier --check .
-nix fmt
-git diff --exit-code -- '*.nix'
 nix develop --command lua-language-server --check . --checklevel=Warning
-nix develop --command ruff format --check .
+nix develop --command uvx ruff format --check .
-nix develop --command ruff check .
+nix develop --command uvx ruff check .
-nix develop --command ty check .
+nix develop --command uvx ty check .
-nix develop --command python -m pytest tests/ -v
+nix develop --command uv run pytest tests/ -v