feat: first draft of arbitrary compile mode

lua/cp/cache.lua

@@ -87,4 +87,26 @@ function M.clear_contest_data(platform, contest_id)
 	end
 end
 
+function M.get_test_cases(platform, contest_id, problem_id)
+	local problem_key = problem_id and (contest_id .. "_" .. problem_id) or contest_id
+	if not cache_data[platform] or not cache_data[platform][problem_key] then
+		return nil
+	end
+	return cache_data[platform][problem_key].test_cases
+end
+
+function M.set_test_cases(platform, contest_id, problem_id, test_cases)
+	local problem_key = problem_id and (contest_id .. "_" .. problem_id) or contest_id
+	if not cache_data[platform] then
+		cache_data[platform] = {}
+	end
+	if not cache_data[platform][problem_key] then
+		cache_data[platform][problem_key] = {}
+	end
+
+	cache_data[platform][problem_key].test_cases = test_cases
+	cache_data[platform][problem_key].test_cases_cached_at = os.time()
+	M.save()
+end
+
 return M

lua/cp/config.lua

@@ -12,19 +12,48 @@ local M = {}
 M.defaults = {
 	contests = {
 		default = {
-			cpp_version = 20,
-			compile_flags = { "-O2", "-DLOCAL", "-Wall", "-Wextra" },
-			debug_flags = { "-g3", "-fsanitize=address,undefined", "-DLOCAL" },
+			cpp = {
+				compile = {
+					"g++",
+					"-std=c++{version}",
+					"-O2",
+					"-DLOCAL",
+					"-Wall",
+					"-Wextra",
+					"{source}",
+					"-o",
+					"{binary}",
+				},
+				run = { "{binary}" },
+				debug = {
+					"g++",
+					"-std=c++{version}",
+					"-g3",
+					"-fsanitize=address,undefined",
+					"-DLOCAL",
+					"{source}",
+					"-o",
+					"{binary}",
+				},
+				executable = nil,
+				version = 20,
+			},
+			python = {
+				compile = nil,
+				run = { "{source}" },
+				debug = { "{source}" },
+				executable = "python3",
+			},
 			timeout_ms = 2000,
 		},
 		atcoder = {
-			cpp_version = 23,
+			cpp = { version = 23 },
 		},
 		codeforces = {
-			cpp_version = 23,
+			cpp = { version = 23 },
 		},
 		cses = {
-			cpp_version = 20,
+			cpp = { version = 20 },
 		},
 	},
 	snippets = {},
@@ -42,11 +71,6 @@ M.defaults = {
 ---@return table
 local function extend_contest_config(base_config, contest_config)
 	local result = vim.tbl_deep_extend("force", base_config, contest_config)
-
-	local std_flag = ("-std=c++%d"):format(result.cpp_version)
-	result.compile_flags = vim.list_extend({ std_flag }, result.compile_flags)
-	result.debug_flags = vim.list_extend({ std_flag }, result.debug_flags)
-
 	return result
 end
 

lua/cp/execute.lua

@@ -1,5 +1,43 @@
 local M = {}
 
+local filetype_to_language = {
+	cpp = "cpp",
+	cxx = "cpp",
+	cc = "cpp",
+	c = "cpp",
+	py = "python",
+	py3 = "python",
+	rs = "rust",
+	java = "java",
+	js = "javascript",
+	go = "go",
+}
+
+local function get_language_from_file(source_file)
+	local extension = vim.fn.fnamemodify(source_file, ":e")
+	return filetype_to_language[extension] or "cpp"
+end
+
+local function substitute_template(cmd_template, substitutions)
+	local result = {}
+	for _, arg in ipairs(cmd_template) do
+		local substituted = arg
+		for key, value in pairs(substitutions) do
+			substituted = substituted:gsub("{" .. key .. "}", value)
+		end
+		table.insert(result, substituted)
+	end
+	return result
+end
+
+local function build_command(cmd_template, executable, substitutions)
+	local cmd = substitute_template(cmd_template, substitutions)
+	if executable then
+		table.insert(cmd, 1, executable)
+	end
+	return cmd
+end
+
 local signal_codes = {
 	[128] = "SIGILL",
 	[130] = "SIGINT",
@@ -22,15 +60,19 @@ local function ensure_directories()
 	vim.system({ "mkdir", "-p", "build", "io" }):wait()
 end
 
-local function compile_cpp(source_path, binary_path, flags)
-	local compile_cmd = { "g++", unpack(flags), source_path, "-o", binary_path }
+local function compile_generic(language_config, substitutions)
+	if not language_config.compile then
+		return { code = 0, stderr = "" }
+	end
+
+	local compile_cmd = substitute_template(language_config.compile, substitutions)
 	return vim.system(compile_cmd, { text = true }):wait()
 end
 
-local function execute_binary(binary_path, input_data, timeout_ms)
+local function execute_command(cmd, input_data, timeout_ms)
 	local start_time = vim.loop.hrtime()
 
-	local result = vim.system({ binary_path }, {
+	local result = vim.system(cmd, {
 		stdin = input_data,
 		timeout = timeout_ms,
 		text = true,
@@ -123,4 +165,63 @@ function M.run_problem(ctx, contest_config, is_debug)
 	end
 end
 
+function M.run_individual_tests(ctx, test_cases, contest_config, is_debug)
+	ensure_directories()
+
+	if not test_cases or #test_cases == 0 then
+		return {}
+	end
+
+	local flags = is_debug and contest_config.debug_flags or contest_config.compile_flags
+	local compile_result = compile_cpp(ctx.source_file, ctx.binary_file, flags)
+	if compile_result.code ~= 0 then
+		return {
+			compile_error = compile_result.stderr,
+			results = {},
+		}
+	end
+
+	local results = {}
+	for i, test_case in ipairs(test_cases) do
+		local exec_result = execute_binary(ctx.binary_file, test_case.input, contest_config.timeout_ms)
+
+		local actual_lines = vim.split(exec_result.stdout, "\n")
+		while #actual_lines > 0 and actual_lines[#actual_lines] == "" do
+			table.remove(actual_lines)
+		end
+
+		local expected_lines = vim.split(test_case.output, "\n")
+		while #expected_lines > 0 and expected_lines[#expected_lines] == "" do
+			table.remove(expected_lines)
+		end
+
+		local matches = #actual_lines == #expected_lines
+		if matches then
+			for j, line in ipairs(actual_lines) do
+				if line ~= expected_lines[j] then
+					matches = false
+					break
+				end
+			end
+		end
+
+		table.insert(results, {
+			id = i,
+			status = exec_result.code == 0 and (matches and "PASS" or "FAIL") or "ERROR",
+			time_ms = exec_result.time_ms,
+			input = test_case.input,
+			expected = test_case.output,
+			actual = exec_result.stdout,
+			exit_code = exec_result.code,
+			timed_out = exec_result.timed_out,
+			enabled = true,
+		})
+	end
+
+	return {
+		compile_error = nil,
+		results = results,
+	}
+end
+
 return M

lua/cp/init.lua

@@ -270,7 +270,10 @@ local function test_problem()
 		local enabled_icon = test_states[result.id] and "[x]" or "[ ]"
 		local time_str = ("%.1fms"):format(result.time_ms)
 
-		table.insert(lines, ("%s Test %d %s %s (%s) {{{"):format(enabled_icon, result.id, status_icon, result.status, time_str))
+		table.insert(
+			lines,
+			("%s Test %d %s %s (%s) {{{"):format(enabled_icon, result.id, status_icon, result.status, time_str)
+		)
 		table.insert(lines, "    Input:")
 		for _, line in ipairs(vim.split(result.input, "\n")) do
 			table.insert(lines, "      " .. line)

lua/cp/scrape.lua

@@ -209,6 +209,7 @@ function M.scrape_problem(ctx)
 		success = true,
 		problem_id = ctx.problem_name,
 		test_count = data.test_cases and #data.test_cases or 0,
+		test_cases = data.test_cases,
 		url = data.url,
 	}
 end