import os import flag import term import time import v.parser import v.ast import v.pref const ( vexe = pref.vexe_path() vroot = os.dir(vexe) support_color = term.can_show_color_on_stderr() && term.can_show_color_on_stdout() ecode_timeout = 101 ecode_memout = 102 ecode_details = { -1: 'worker executable not found' 101: 'too slow' 102: 'too memory hungry' } ) struct Context { mut: is_help bool is_worker bool is_verbose bool is_silent bool // do not print any status/progress during processing, just failures. is_linear bool // print linear progress log, without trying to do term cursor up + \r msg. Easier to use in a CI job timeout_ms int myself string // path to this executable, so the supervisor can launch worker processes all_paths []string // all files given to the supervisor process path string // the current path, given to a worker process cut_index int // the cut position in the source from context.path max_index int // the maximum index (equivalent to the file content length) // parser context in the worker processes: table ast.Table scope ast.Scope pref &pref.Preferences period_ms int // print periodic progress stop_print bool // stop printing the periodic progress } fn main() { mut context := process_cli_args() if context.is_worker { pid := os.getpid() context.log('> worker ${pid:5} starts parsing at cut_index: ${context.cut_index:5} | $context.path') // A worker's process job is to try to parse a single given file in context.path. // It can crash/panic freely. context.table = ast.new_table() context.scope = &ast.Scope{ parent: 0 } context.pref = &pref.Preferences{ output_mode: .silent } mut source := os.read_file(context.path) ? source = source[..context.cut_index] go fn (ms int) { time.sleep(ms * time.millisecond) exit(ecode_timeout) }(context.timeout_ms) _ := parser.parse_text(source, context.path, context.table, .skip_comments, context.pref) context.log('> worker ${pid:5} finished parsing $context.path') exit(0) } else { // The process supervisor should NOT crash/panic, unlike the workers. // It's job, is to: // 1) start workers // 2) accumulate results // 3) produce a summary at the end context.expand_all_paths() mut fails := 0 mut panics := 0 sw := time.new_stopwatch() for path in context.all_paths { filesw := time.new_stopwatch() context.start_printing() new_fails, new_panics := context.process_whole_file_in_worker(path) fails += new_fails panics += new_panics context.stop_printing() context.info('File: ${path:-30} | new_fails: ${new_fails:5} | new_panics: ${new_panics:5} | Elapsed time: ${filesw.elapsed().milliseconds()}ms') } non_panics := fails - panics context.info('Total files processed: ${context.all_paths.len:5} | Errors found: ${fails:5} | Panics: ${panics:5} | Non panics: ${non_panics:5} | Elapsed time: ${sw.elapsed().milliseconds()}ms') if fails > 0 { exit(1) } exit(0) } } fn process_cli_args() &Context { mut context := &Context{ pref: pref.new_preferences() } context.myself = os.executable() mut fp := flag.new_flag_parser(os.args_after('test-parser')) fp.application(os.file_name(context.myself)) fp.version('0.0.1') fp.description('Test the V parser, by parsing each .v file in each PATH,\n' + 'as if it was typed character by character by the user.\n' + 'A PATH can be either a folder, or a specific .v file.\n' + 'Note: you *have to quote* the PATH, if it contains spaces/punctuation.') fp.arguments_description('PATH1 PATH2 ...') fp.skip_executable() context.is_help = fp.bool('help', `h`, false, 'Show help/usage screen.') context.is_verbose = fp.bool('verbose', `v`, false, 'Be more verbose.') context.is_silent = fp.bool('silent', `S`, false, 'Do not print progress at all.') context.is_linear = fp.bool('linear', `L`, false, 'Print linear progress log. Suitable for CI.') context.period_ms = fp.int('progress_ms', `s`, 500, 'print a status report periodically, the period is given in milliseconds.') context.is_worker = fp.bool('worker', `w`, false, 'worker specific flag - is this a worker process, that can crash/panic.') context.cut_index = fp.int('cut_index', `c`, 1, 'worker specific flag - cut index in the source file, everything before that will be parsed, the rest - ignored.') context.timeout_ms = fp.int('timeout_ms', `t`, 250, 'worker specific flag - timeout in ms; a worker taking longer, will self terminate.') context.path = fp.string('path', `p`, '', 'worker specific flag - path to the current source file, which will be parsed.') // if context.is_help { println(fp.usage()) exit(0) } context.all_paths = fp.finalize() or { context.error(err.msg) exit(1) } if !context.is_worker && context.all_paths.len == 0 { println(fp.usage()) exit(0) } return context } // //////////////// fn bold(msg string) string { if !support_color { return msg } return term.bold(msg) } fn red(msg string) string { if !support_color { return msg } return term.red(msg) } fn yellow(msg string) string { if !support_color { return msg } return term.yellow(msg) } fn (mut context Context) info(msg string) { println(msg) } fn (mut context Context) log(msg string) { if context.is_verbose { label := yellow('info') ts := time.now().format_ss_micro() eprintln('$label: $ts | $msg') } } fn (mut context Context) error(msg string) { label := red('error') eprintln('$label: $msg') } fn (mut context Context) expand_all_paths() { context.log('> context.all_paths before: $context.all_paths') mut files := []string{} for path in context.all_paths { if os.is_dir(path) { files << os.walk_ext(path, '.v') files << os.walk_ext(path, '.vsh') continue } if !path.ends_with('.v') && !path.ends_with('.vv') && !path.ends_with('.vsh') { context.error('`v test-parser` can only be used on .v/.vv/.vsh files.\nOffending file: "$path".') continue } if !os.exists(path) { context.error('"$path" does not exist.') continue } files << path } context.all_paths = files context.log('> context.all_paths after: $context.all_paths') } fn (mut context Context) process_whole_file_in_worker(path string) (int, int) { context.path = path // needed for the progress bar context.log('> context.process_whole_file_in_worker path: $path') if !(os.is_file(path) && os.is_readable(path)) { context.error('$path is not readable') return 1, 0 } source := os.read_file(path) or { '' } if source == '' { // an empty file is a valid .v file return 0, 0 } len := source.len - 1 mut fails := 0 mut panics := 0 context.max_index = len for i in 0 .. len { verbosity := if context.is_verbose { '-v' } else { '' } context.cut_index = i // needed for the progress bar cmd := '${os.quoted_path(context.myself)} $verbosity --worker --timeout_ms ${context.timeout_ms:5} --cut_index ${i:5} --path ${os.quoted_path(path)} ' context.log(cmd) mut res := os.execute(cmd) context.log('worker exit_code: $res.exit_code | worker output:\n$res.output') if res.exit_code != 0 { fails++ mut is_panic := false if res.output.contains('V panic:') { is_panic = true panics++ } part := source[..i] line := part.count('\n') + 1 last_line := part.all_after_last('\n') col := last_line.len err := if is_panic { red('parser failure: panic') } else { red('parser failure: crash, ${ecode_details[res.exit_code]}') } path_to_line := bold('$path:$line:$col:') err_line := last_line.trim_left('\t') println('$path_to_line $err') println('\t$line | $err_line') println('') eprintln(res.output) } } return fails, panics } fn (mut context Context) start_printing() { context.stop_print = false if !context.is_linear && !context.is_silent { println('\n') } go context.print_periodic_status() } fn (mut context Context) stop_printing() { context.stop_print = true time.sleep(time.millisecond * context.period_ms / 5) } fn (mut context Context) print_status() { if context.is_silent { return } if (context.cut_index == 1) && (context.max_index == 0) { return } msg := '> ${context.path:-30} | index: ${context.cut_index:5}/${context.max_index - 1:5}' if context.is_linear { eprintln(msg) return } term.cursor_up(1) eprint('\r $msg\n') } fn (mut context Context) print_periodic_status() { context.print_status() mut printed_at_least_once := false for !context.stop_print { context.print_status() for i := 0; i < 10 && !context.stop_print; i++ { time.sleep(time.millisecond * context.period_ms / 10) if context.cut_index > 50 && !printed_at_least_once { context.print_status() printed_at_least_once = true } } } context.print_status() }