373 lines
11 KiB
V
373 lines
11 KiB
V
// This tool regenerates V's bootstrap .c files
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// every time the V master branch is updated.
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// if run with the --serve flag it will run in webhook
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// server mode awaiting a request to http://host:port/genhook
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// available command line flags:
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// --work-dir gen_vc's working directory
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// --purge force purge the local repositories
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// --serve run in webhook server mode
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// --port port for http server to listen on
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// --log-to either 'file' or 'terminal'
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// --log-file path to log file used when --log-to is 'file'
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// --dry-run dont push anything to remote repo
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module main
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import (
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os
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log
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flag
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time
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vweb
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net.urllib
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)
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// git credentials
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const(
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git_username = os.getenv('GITUSER')
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git_password = os.getenv('GITPASS')
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)
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// repository
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const(
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// git repo
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git_repo_v = 'github.com/vlang/v'
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git_repo_vc = 'github.com/vlang/vc'
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// local repo directories
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git_repo_dir_v = 'v'
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git_repo_dir_vc = 'vc'
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)
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// gen_vc
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const(
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// name
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app_name = 'gen_vc'
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// version
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app_version = '0.1.0'
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// description
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app_description = 'This tool regenerates V\'s bootstrap .c files every time the V master branch is updated.'
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// assume something went wrong if file size less than this
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too_short_file_limit = 5000
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// create a .c file for these os's
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vc_build_oses = [
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'unix',
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'windows'
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]
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)
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// default options (overridden by flags)
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const(
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// gen_vc working directory
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work_dir = '/tmp/gen_vc'
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// dont push anything to remote repo
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dry_run = false
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// server port
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server_port = 7171
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// log file
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log_file = '$work_dir/log.txt'
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// log_to is either 'file' or 'terminal'
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log_to = 'terminal'
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)
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// errors
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const(
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err_msg_build = 'error building'
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err_msg_make = 'make failed'
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err_msg_gen_c = 'failed to generate .c file'
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err_msg_cmd_x = 'error running cmd'
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)
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struct GenVC {
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// logger
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logger &log.Log
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// flag options
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options FlagOptions
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mut:
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// true if error was experienced running generate
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gen_error bool
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}
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// webhook server
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struct WebhookServer {
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pub mut:
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vweb vweb.Context
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gen_vc &GenVC
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}
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// storage for flag options
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struct FlagOptions {
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work_dir string
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purge bool
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serve bool
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port int
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log_to string
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log_file string
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dry_run bool
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}
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fn main() {
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mut fp := flag.new_flag_parser(os.args.clone())
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fp.application(app_name)
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fp.version(app_version)
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fp.description(app_description)
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fp.skip_executable()
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flag_options := parse_flags(mut fp)
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_ = fp.finalize() or {
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eprintln(err)
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println(fp.usage())
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return
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}
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// webhook server mode
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if flag_options.serve {
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vweb.run<WebhookServer>(flag_options.port)
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}
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// cmd mode
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else {
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mut gen_vc := new_gen_vc(flag_options)
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gen_vc.init()
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gen_vc.generate()
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}
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}
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// new GenVC
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fn new_gen_vc(flag_options FlagOptions) &GenVC {
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return &GenVC{
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// options
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options: flag_options
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// logger
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logger: if flag_options.log_to == 'file' {
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&log.Log{log.DEBUG, flag_options.log_file}
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} else {
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&log.Log{log.DEBUG, 'terminal'}
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}
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}
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}
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// WebhookServer init
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pub fn (ws mut WebhookServer) init() {
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mut fp := flag.new_flag_parser(os.args.clone())
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flag_options := parse_flags(mut fp)
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ws.gen_vc = new_gen_vc(flag_options)
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ws.gen_vc.init()
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}
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// gen webhook
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pub fn (ws mut WebhookServer) genhook() {
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ws.gen_vc.generate()
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// error in generate
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if ws.gen_vc.gen_error {
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ws.vweb.json('{status: "failed"}')
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return
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}
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ws.vweb.json('{status: "ok"}')
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}
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// parse flags to FlagOptions struct
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fn parse_flags(fp mut flag.FlagParser) FlagOptions {
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return FlagOptions{
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serve : fp.bool('serve', false, 'run in webhook server mode')
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work_dir : fp.string('work-dir', work_dir, 'gen_vc working directory')
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purge : fp.bool('purge', false, 'force purge the local repositories')
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port : fp.int('port', int(server_port), 'port for web server to listen on')
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log_to : fp.string('log-to', log_to, 'log to is \'file\' or \'terminal\'')
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log_file : fp.string('log_file', log_file, 'log file to use when log-to is \'file\'')
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dry_run : fp.bool('dry-run', dry_run, 'when specified dont push anything to remote repo')
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}
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}
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// init
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fn (gen_vc mut GenVC) init() {
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// purge repos if flag is passed
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if gen_vc.options.purge {
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gen_vc.purge_repos()
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}
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}
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// regenerate
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fn (gen_vc mut GenVC) generate() {
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// set errors to false
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gen_vc.gen_error = false
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// check if gen_vc dir exists
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if !os.dir_exists(gen_vc.options.work_dir) {
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// try create
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os.mkdir(gen_vc.options.work_dir)
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// still dosen't exist... we have a problem
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if !os.dir_exists(gen_vc.options.work_dir) {
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gen_vc.logger.error('error creating directory: $gen_vc.options.work_dir')
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gen_vc.gen_error = true
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return
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}
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}
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// cd to gen_vc dir
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os.chdir(gen_vc.options.work_dir)
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// if we are not running with the --serve flag (webhook server)
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// rather than deleting and re-downloading the repo each time
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// first check to see if the local v repo is behind master
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// if it isn't behind theres no point continuing further
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if !gen_vc.options.serve && os.dir_exists(git_repo_dir_v) {
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gen_vc.cmd_exec('git -C $git_repo_dir_v checkout master')
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// fetch the remote repo just in case there are newer commits there
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gen_vc.cmd_exec('git -C $git_repo_dir_v fetch')
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git_status := gen_vc.cmd_exec('git -C $git_repo_dir_v status')
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if !git_status.contains('behind') {
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gen_vc.logger.warn('v repository is already up to date.')
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return
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}
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}
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// delete repos
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gen_vc.purge_repos()
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// clone repos
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gen_vc.cmd_exec('git clone --depth 1 https://$git_repo_v $git_repo_dir_v')
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gen_vc.cmd_exec('git clone --depth 1 https://$git_repo_vc $git_repo_dir_vc')
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// get output of git log -1 (last commit)
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git_log_v := gen_vc.cmd_exec('git -C $git_repo_dir_v log -1 --format="commit %H%nDate: %ci%nDate Unix: %ct"')
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git_log_vc := gen_vc.cmd_exec('git -C $git_repo_dir_vc log -1 --format="Commit %H%nDate: %ci%nDate Unix: %ct"')
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// date of last commit in each repo
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ts_v := git_log_v.find_between('Date:', '\n').trim_space()
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ts_vc := git_log_vc.find_between('Date:', '\n').trim_space()
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// parse time as string to time.Time
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last_commit_time_v := time.parse(ts_v)
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last_commit_time_vc := time.parse(ts_vc)
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// git dates are in users local timezone and v time.parse does not parse
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// timezones at the moment, so for now get unix timestamp from output also
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t_unix_v := git_log_v.find_between('Date Unix:', '\n').trim_space().int()
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t_unix_vc := git_log_vc.find_between('Date Unix:', '\n').trim_space().int()
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// last commit hash in v repo
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last_commit_hash_v := git_log_v.find_between('commit', '\n').trim_space()
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last_commit_hash_v_short := last_commit_hash_v[..7]
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// log some info
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gen_vc.logger.debug('last commit time ($git_repo_v): ' + last_commit_time_v.format_ss())
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gen_vc.logger.debug('last commit time ($git_repo_vc): ' + last_commit_time_vc.format_ss())
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gen_vc.logger.debug('last commit hash ($git_repo_v): $last_commit_hash_v')
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// if vc repo already has a newer commit than the v repo, assume it's up to date
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if t_unix_vc >= t_unix_v {
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gen_vc.logger.warn('vc repository is already up to date.')
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return
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}
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// try build v for current os (linux in this case)
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gen_vc.cmd_exec('make -C $git_repo_dir_v')
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v_exec := '$git_repo_dir_v/v'
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// check if make was successful
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gen_vc.assert_file_exists_and_is_not_too_short(v_exec, err_msg_make)
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// build v.c for each os
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for os_name in vc_build_oses {
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vc_suffix := if os_name == 'unix' { '' } else { '_${os_name[..3]}' }
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v_os_arg := if os_name == 'unix' { '' } else { '-os $os_name' }
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c_file := 'v${vc_suffix}.c'
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// try generate .c file
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gen_vc.cmd_exec('$v_exec $v_os_arg -o $c_file $git_repo_dir_v/compiler')
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// check if the c file seems ok
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gen_vc.assert_file_exists_and_is_not_too_short(c_file, err_msg_gen_c)
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// embed the latest v commit hash into the c file
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gen_vc.cmd_exec('sed -i \'1s/^/#define V_COMMIT_HASH "$last_commit_hash_v_short"\\n/\' $c_file')
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// run clang-format to make the c file more readable
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gen_vc.cmd_exec('clang-format -i $c_file')
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// move to vc repo
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gen_vc.cmd_exec('mv $c_file $git_repo_dir_vc/$c_file')
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// add new .c file to local vc repo
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gen_vc.cmd_exec('git -C $git_repo_dir_vc add $c_file')
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}
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// check if the vc repo actually changed
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git_status := gen_vc.cmd_exec('git -C $git_repo_dir_vc status')
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if git_status.contains('nothing to commit') {
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gen_vc.logger.error('no changes to vc repo: something went wrong.')
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gen_vc.gen_error = true
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}
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// commit changes to local vc repo
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gen_vc.cmd_exec_safe('git -C $git_repo_dir_vc commit -m "update from master - $last_commit_hash_v_short"')
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// push changes to remote vc repo
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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')
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}
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// only execute when dry_run option is false, otherwise just log
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fn (gen_vc mut GenVC) cmd_exec_safe(cmd string) string {
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return gen_vc.command_execute(cmd, gen_vc.options.dry_run)
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}
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// always execute command
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fn (gen_vc mut GenVC) cmd_exec(cmd string) string {
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return gen_vc.command_execute(cmd, false)
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}
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// execute command
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fn (gen_vc mut GenVC) command_execute(cmd string, dry bool) string {
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// if dry is true then dont execute, just log
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if dry {
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return gen_vc.command_execute_dry(cmd)
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}
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gen_vc.logger.info('cmd: $cmd')
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r := os.exec(cmd) or {
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gen_vc.logger.error('$err_msg_cmd_x: "$cmd" could not start.')
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gen_vc.logger.error( err )
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// something went wrong, better start fresh next time
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gen_vc.purge_repos()
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gen_vc.gen_error = true
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return ''
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}
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if r.exit_code != 0 {
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gen_vc.logger.error('$err_msg_cmd_x: "$cmd" failed.')
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gen_vc.logger.error(r.output)
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// something went wrong, better start fresh next time
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gen_vc.purge_repos()
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gen_vc.gen_error = true
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return ''
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}
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return r.output
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}
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// just log cmd, dont execute
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fn (gen_vc mut GenVC) command_execute_dry(cmd string) string {
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gen_vc.logger.info('cmd (dry): "$cmd"')
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return ''
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}
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// delete repo directories
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fn (gen_vc mut GenVC) purge_repos() {
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// delete old repos (better to be fully explicit here, since these are destructive operations)
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mut repo_dir := '$gen_vc.options.work_dir/$git_repo_dir_v'
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if os.dir_exists(repo_dir) {
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gen_vc.logger.info('purging local repo: "$repo_dir"')
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gen_vc.cmd_exec('rm -rf $repo_dir')
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}
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repo_dir = '$gen_vc.options.work_dir/$git_repo_dir_vc'
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if os.dir_exists(repo_dir) {
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gen_vc.logger.info('purging local repo: "$repo_dir"')
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gen_vc.cmd_exec('rm -rf $repo_dir')
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}
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}
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// check if file size is too short
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fn (gen_vc mut GenVC) assert_file_exists_and_is_not_too_short(f string, emsg string){
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if !os.file_exists(f) {
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gen_vc.logger.error('$err_msg_build: $emsg .')
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gen_vc.gen_error = true
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return
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}
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fsize := os.file_size(f)
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if fsize < too_short_file_limit {
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gen_vc.logger.error('$err_msg_build: $f exists, but is too short: only $fsize bytes.')
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gen_vc.gen_error = true
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return
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}
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}
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