module main // This tool regenerates V's bootstrap .c files // every time the V master branch is updated. // if run with the --serve flag it will run in webhook // server mode awaiting a request to http://host:port/genhook // available command line flags: // --work-dir gen_vc's working directory // --purge force purge the local repositories // --serve run in webhook server mode // --port port for http server to listen on // --log-to either 'file' or 'terminal' // --log-file path to log file used when --log-to is 'file' // --dry-run dont push anything to remote repo // --force force update even if already up to date import os import log import flag import time import vweb import net.urllib // git credentials const ( git_username = os.getenv('GITUSER') git_password = os.getenv('GITPASS') ) // repository const ( // git repo git_repo_v = 'github.com/vlang/v' git_repo_vc = 'github.com/vlang/vc' // local repo directories git_repo_dir_v = 'v' git_repo_dir_vc = 'vc' ) // gen_vc const ( // name app_name = 'gen_vc' // version app_version = '0.1.2' // description app_description = "This tool regenerates V\'s bootstrap .c files every time the V master branch is updated." // assume something went wrong if file size less than this too_short_file_limit = 5000 // create a .c file for these os's vc_build_oses = [ 'nix', // all nix based os 'windows', ] ) // default options (overridden by flags) const ( // gen_vc working directory work_dir = '/tmp/gen_vc' // dont push anything to remote repo dry_run = false // server port server_port = 7171 // log file log_file = '$work_dir/log.txt' // log_to is either 'file' or 'terminal' log_to = 'terminal' ) // errors const ( err_msg_build = 'error building' err_msg_make = 'make failed' err_msg_gen_c = 'failed to generate .c file' err_msg_cmd_x = 'error running cmd' ) struct GenVC { // logger // flag options options FlagOptions mut: logger &log.Log // true if error was experienced running generate gen_error bool } // webhook server struct WebhookServer { pub mut: vweb vweb.Context gen_vc &GenVC } // storage for flag options struct FlagOptions { work_dir string purge bool serve bool port int log_to string log_file string dry_run bool force bool } fn main() { mut fp := flag.new_flag_parser(os.args.clone()) fp.application(app_name) fp.version(app_version) fp.description(app_description) fp.skip_executable() show_help := fp.bool('help', 0, false, 'Show this help screen\n') flag_options := parse_flags(mut fp) if show_help { println(fp.usage()) exit(0) } fp.finalize() or { eprintln(err) println(fp.usage()) return } // webhook server mode if flag_options.serve { vweb.run(flag_options.port) } else { // cmd mode mut gen_vc := new_gen_vc(flag_options) gen_vc.init() gen_vc.generate() } } // new GenVC fn new_gen_vc(flag_options FlagOptions) &GenVC { mut logger := &log.Log{} logger.set_level(.debug) if flag_options.log_to == 'file' { logger.set_full_logpath(flag_options.log_file) } return &GenVC{ options: flag_options logger: logger } } // WebhookServer init pub fn (mut ws WebhookServer) init_once() { mut fp := flag.new_flag_parser(os.args.clone()) flag_options := parse_flags(mut fp) ws.gen_vc = new_gen_vc(flag_options) ws.gen_vc.init() // ws.gen_vc = new_gen_vc(flag_options) } pub fn (mut ws WebhookServer) init() { // ws.init_once() } pub fn (mut ws WebhookServer) index() { eprintln('WebhookServer.index() called') } // gen webhook pub fn (mut ws WebhookServer) genhook() { // request data // println(ws.vweb.req.data) // TODO: parse request. json or urlencoded // json.decode or net.urllib.parse ws.gen_vc.generate() // error in generate if ws.gen_vc.gen_error { ws.vweb.json('{status: "failed"}') return } ws.vweb.json('{status: "ok"}') } pub fn (ws &WebhookServer) reset() { } // parse flags to FlagOptions struct fn parse_flags(mut fp flag.FlagParser) FlagOptions { return FlagOptions{ serve: fp.bool('serve', 0, false, 'run in webhook server mode') work_dir: fp.string('work-dir', 0, work_dir, 'gen_vc working directory') purge: fp.bool('purge', 0, false, 'force purge the local repositories') port: fp.int('port', 0, server_port, 'port for web server to listen on') log_to: fp.string('log-to', 0, log_to, "log to is \'file\' or \'terminal\'") log_file: fp.string('log-file', 0, log_file, "log file to use when log-to is \'file\'") dry_run: fp.bool('dry-run', 0, dry_run, 'when specified dont push anything to remote repo') force: fp.bool('force', 0, false, 'force update even if already up to date') } } // init fn (mut gen_vc GenVC) init() { // purge repos if flag is passed if gen_vc.options.purge { gen_vc.purge_repos() } } // regenerate fn (mut gen_vc GenVC) generate() { // set errors to false gen_vc.gen_error = false // check if gen_vc dir exists if !os.is_dir(gen_vc.options.work_dir) { // try create os.mkdir(gen_vc.options.work_dir) or { panic(err) } // still dosen't exist... we have a problem if !os.is_dir(gen_vc.options.work_dir) { gen_vc.logger.error('error creating directory: $gen_vc.options.work_dir') gen_vc.gen_error = true return } } // cd to gen_vc dir os.chdir(gen_vc.options.work_dir) // if we are not running with the --serve flag (webhook server) // rather than deleting and re-downloading the repo each time // first check to see if the local v repo is behind master // if it isn't behind theres no point continuing further if !gen_vc.options.serve && os.is_dir(git_repo_dir_v) { gen_vc.cmd_exec('git -C $git_repo_dir_v checkout master') // fetch the remote repo just in case there are newer commits there gen_vc.cmd_exec('git -C $git_repo_dir_v fetch') git_status := gen_vc.cmd_exec('git -C $git_repo_dir_v status') if !git_status.contains('behind') && !gen_vc.options.force { gen_vc.logger.warn('v repository is already up to date.') return } } // delete repos gen_vc.purge_repos() // clone repos gen_vc.cmd_exec('git clone --depth 1 https://$git_repo_v $git_repo_dir_v') gen_vc.cmd_exec('git clone --depth 1 https://$git_repo_vc $git_repo_dir_vc') // get output of git log -1 (last commit) git_log_v := gen_vc.cmd_exec('git -C $git_repo_dir_v log -1 --format="commit %H%nDate: %ci%nDate Unix: %ct%nSubject: %s"') git_log_vc := gen_vc.cmd_exec('git -C $git_repo_dir_vc log -1 --format="Commit %H%nDate: %ci%nDate Unix: %ct%nSubject: %s"') // date of last commit in each repo ts_v := git_log_v.find_between('Date:', '\n').trim_space() ts_vc := git_log_vc.find_between('Date:', '\n').trim_space() // parse time as string to time.Time last_commit_time_v := time.parse(ts_v) or { panic(err) } last_commit_time_vc := time.parse(ts_vc) or { panic(err) } // git dates are in users local timezone and v time.parse does not parse // timezones at the moment, so for now get unix timestamp from output also t_unix_v := git_log_v.find_between('Date Unix:', '\n').trim_space().int() t_unix_vc := git_log_vc.find_between('Date Unix:', '\n').trim_space().int() // last commit hash in v repo last_commit_hash_v := git_log_v.find_between('commit', '\n').trim_space() last_commit_hash_v_short := last_commit_hash_v[..7] // subject last_commit_subject := git_log_v.find_between('Subject:', '\n').trim_space().replace('"', '\\"') // log some info gen_vc.logger.debug('last commit time ($git_repo_v): ' + last_commit_time_v.format_ss()) gen_vc.logger.debug('last commit time ($git_repo_vc): ' + last_commit_time_vc.format_ss()) gen_vc.logger.debug('last commit hash ($git_repo_v): $last_commit_hash_v') gen_vc.logger.debug('last commit subject ($git_repo_v): $last_commit_subject') // if vc repo already has a newer commit than the v repo, assume it's up to date if t_unix_vc >= t_unix_v && !gen_vc.options.force { gen_vc.logger.warn('vc repository is already up to date.') return } // try build v for current os (linux in this case) gen_vc.cmd_exec('make -C $git_repo_dir_v') v_exec := '$git_repo_dir_v/v' // check if make was successful gen_vc.assert_file_exists_and_is_not_too_short(v_exec, err_msg_make) // build v.c for each os for os_name in vc_build_oses { vc_suffix := if os_name == 'nix' { '' } else { '_${os_name[..3]}' } v_flags := if os_name == 'nix' { '-os cross' } else { '-os $os_name' } c_file := 'v${vc_suffix}.c' // try generate .c file gen_vc.cmd_exec('$v_exec $v_flags -o $c_file $git_repo_dir_v/cmd/v') // check if the c file seems ok gen_vc.assert_file_exists_and_is_not_too_short(c_file, err_msg_gen_c) // embed the latest v commit hash into the c file gen_vc.cmd_exec('sed -i \'1s/^/#define V_COMMIT_HASH "$last_commit_hash_v_short"\\n/\' $c_file') // move to vc repo gen_vc.cmd_exec('mv $c_file $git_repo_dir_vc/$c_file') // add new .c file to local vc repo gen_vc.cmd_exec('git -C $git_repo_dir_vc add $c_file') } // check if the vc repo actually changed git_status := gen_vc.cmd_exec('git -C $git_repo_dir_vc status') if git_status.contains('nothing to commit') { gen_vc.logger.error('no changes to vc repo: something went wrong.') gen_vc.gen_error = true } // commit changes to local vc repo gen_vc.cmd_exec_safe('git -C $git_repo_dir_vc commit -m "[v:master] $last_commit_hash_v_short - $last_commit_subject"') // push changes to remote vc repo gen_vc.cmd_exec_safe('git -C $git_repo_dir_vc push https://${urllib.query_escape(git_username)}:${urllib.query_escape(git_password)}@$git_repo_vc master') } // only execute when dry_run option is false, otherwise just log fn (mut gen_vc GenVC) cmd_exec_safe(cmd string) string { return gen_vc.command_execute(cmd, gen_vc.options.dry_run) } // always execute command fn (mut gen_vc GenVC) cmd_exec(cmd string) string { return gen_vc.command_execute(cmd, false) } // execute command fn (mut gen_vc GenVC) command_execute(cmd string, dry bool) string { // if dry is true then dont execute, just log if dry { return gen_vc.command_execute_dry(cmd) } gen_vc.logger.info('cmd: $cmd') r := os.exec(cmd) or { gen_vc.logger.error('$err_msg_cmd_x: "$cmd" could not start.') gen_vc.logger.error(err) // something went wrong, better start fresh next time gen_vc.purge_repos() gen_vc.gen_error = true return '' } if r.exit_code != 0 { gen_vc.logger.error('$err_msg_cmd_x: "$cmd" failed.') gen_vc.logger.error(r.output) // something went wrong, better start fresh next time gen_vc.purge_repos() gen_vc.gen_error = true return '' } return r.output } // just log cmd, dont execute fn (mut gen_vc GenVC) command_execute_dry(cmd string) string { gen_vc.logger.info('cmd (dry): "$cmd"') return '' } // delete repo directories fn (mut gen_vc GenVC) purge_repos() { // delete old repos (better to be fully explicit here, since these are destructive operations) mut repo_dir := '$gen_vc.options.work_dir/$git_repo_dir_v' if os.is_dir(repo_dir) { gen_vc.logger.info('purging local repo: "$repo_dir"') gen_vc.cmd_exec('rm -rf $repo_dir') } repo_dir = '$gen_vc.options.work_dir/$git_repo_dir_vc' if os.is_dir(repo_dir) { gen_vc.logger.info('purging local repo: "$repo_dir"') gen_vc.cmd_exec('rm -rf $repo_dir') } } // check if file size is too short fn (mut gen_vc GenVC) assert_file_exists_and_is_not_too_short(f string, emsg string) { if !os.exists(f) { gen_vc.logger.error('$err_msg_build: $emsg .') gen_vc.gen_error = true return } fsize := os.file_size(f) if fsize < too_short_file_limit { gen_vc.logger.error('$err_msg_build: $f exists, but is too short: only $fsize bytes.') gen_vc.gen_error = true return } }