// Run is the top-level runner for modd
func Run(log termlog.TermLog, cnf *conf.Config, watchconf string, notifiers []notify.Notifier) (*conf.Config, error) {
shellMethod := cnf.GetVariables()[shellVarName]
if !shell.Has(shellMethod) {
return nil, fmt.Errorf("No shell interface %q", shellMethod)
}
modchan := make(chan *watch.Mod, 1024)
return runOnChan(modchan, func() {}, log, cnf, watchconf, notifiers)
}
// PrepOnly runs all prep functions and exits
func PrepOnly(log termlog.TermLog, cnf *conf.Config, notifiers []notify.Notifier) error {
for _, b := range cnf.Blocks {
err := RunPreps(b, cnf.GetVariables(), nil, log, notifiers)
if err != nil {
return err
}
}
return nil
}
// NewDaemonWorld creates a DaemonWorld
func NewDaemonWorld(cnf *conf.Config, log termlog.TermLog) (*DaemonWorld, error) {
daemonPens := make([]*DaemonPen, len(cnf.Blocks))
for i, b := range cnf.Blocks {
d, err := NewDaemonPen(b, cnf.GetVariables(), log)
if err != nil {
return nil, err
}
daemonPens[i] = d
}
return &DaemonWorld{daemonPens}, nil
}
// Gives control of chan to caller
func runOnChan(modchan chan *watch.Mod, readyCallback func(), log termlog.TermLog, cnf *conf.Config, watchconf string, notifiers []notify.Notifier) (*conf.Config, error) {
err := PrepOnly(log, cnf, notifiers)
if err != nil {
return nil, err
}
dworld, err := NewDaemonWorld(cnf, log)
if err != nil {
return nil, err
}
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, os.Kill)
defer signal.Reset(os.Interrupt, os.Kill)
defer dworld.Shutdown(os.Kill)
go func() {
dworld.Shutdown(<-c)
os.Exit(0)
}()
dworld.Start()
watchpaths := cnf.WatchPatterns()
if watchconf != "" {
watchpaths = append(watchpaths, filepath.Dir(watchconf))
}
// FIXME: This takes a long time. We could start it in parallel with the
// first process run in a goroutine
watcher, err := watch.Watch(watchpaths, lullTime, modchan)
if err != nil {
return nil, fmt.Errorf("Error watching: %s", err)
}
defer watcher.Stop()
go readyCallback()
for mod := range modchan {
if mod == nil {
break
}
if watchconf != "" && mod.Has(watchconf) {
ret, err := ioutil.ReadFile(watchconf)
if err != nil {
log.Warn("Reloading config - error reading %s: %s", watchconf, err)
continue
}
newcnf, err := conf.Parse(watchconf, string(ret))
if err != nil {
log.Warn("Reloading config - error reading %s: %s", watchconf, err)
continue
}
log.Notice("Reloading config %s", watchconf)
return newcnf, nil
}
log.SayAs("debug", "Delta: \n%s", mod.String())
for i, b := range cnf.Blocks {
lmod, err := mod.Filter(b.Include, b.Exclude)
if err != nil {
log.Shout("Error filtering events: %s", err)
continue
}
if lmod.Empty() {
continue
}
err = RunPreps(b, cnf.GetVariables(), lmod, log, notifiers)
if err != nil {
if _, ok := err.(ProcError); ok {
continue
} else {
return nil, err
}
}
dworld.DaemonPens[i].Restart()
}
}
return nil, nil
}
func run(log termlog.TermLog, cnf *conf.Config, watchconf string) *conf.Config {
modchan := make(chan *watch.Mod, 1024)
if *ignores {
for _, patt := range watch.CommonExcludes {
fmt.Println(patt)
}
os.Exit(0)
}
daemonPens := make([]*modd.DaemonPen, len(cnf.Blocks))
for i, b := range cnf.Blocks {
if !b.NoCommonFilter {
b.Exclude = append(b.Exclude, watch.CommonExcludes...)
}
cnf.Blocks[i] = b
_, err := prepsAndNotify(b, cnf.GetVariables(), nil, log)
if err != nil {
log.Shout("%s", err)
return nil
}
d := modd.DaemonPen{}
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, os.Kill)
go func() {
d.Shutdown(<-c)
os.Exit(0)
}()
if !*prep {
d.Start(b.Daemons, cnf.GetVariables(), log)
}
daemonPens[i] = &d
}
if *prep {
os.Exit(0)
}
watchpaths := cnf.WatchPaths()
if watchconf != "" {
watchpaths = append(watchpaths, watchconf)
}
// FIXME: This takes a long time. We could start it in parallel with the
// first process run in a goroutine
watcher, err := watch.Watch(watchpaths, lullTime, modchan)
defer watcher.Stop()
if err != nil {
kingpin.Fatalf("Fatal error: %s", err)
}
for mod := range modchan {
if watchconf != "" && mod.Has(watchconf) {
ret, err := ioutil.ReadFile(watchconf)
if err != nil {
log.Warn("Reloading config - error reading %s: %s", watchconf, err)
continue
}
newcnf, err := conf.Parse(*file, string(ret))
if err != nil {
log.Warn("Reloading config - error reading %s: %s", watchconf, err)
continue
}
log.Notice("Reloading config %s", watchconf)
return newcnf
}
if mod == nil {
break
}
log.SayAs("debug", "Delta: \n%s", mod.String())
for i, b := range cnf.Blocks {
lmod, err := mod.Filter(b.Include, b.Exclude)
if err != nil {
log.Shout("Error filtering events: %s", err)
continue
}
if lmod.Empty() {
continue
}
proceed, err := prepsAndNotify(b, cnf.GetVariables(), lmod, log)
if err != nil {
log.Shout("%s", err)
return nil
}
if !proceed {
continue
}
daemonPens[i].Restart()
}
}
return nil
}