/
cmd.go
111 lines (87 loc) · 2.39 KB
/
cmd.go
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package cmd
import (
"context"
"os"
"os/signal"
"syscall"
"github.com/alecthomas/kingpin/v2"
"github.com/hashicorp/go-hclog"
"github.com/pkg/errors"
"golang.org/x/sync/errgroup"
"github.com/pipego/runner/config"
"github.com/pipego/runner/server"
)
const (
logName = "runner"
routineNum = -1
)
var (
app = kingpin.New("runner", "pipego runner").Version(config.Version + "-build-" + config.Build)
listenUrl = app.Flag("listen-url", "Listen URL (host:port)").Required().String()
logLevel = app.Flag("log-level", "Log level (DEBUG|INFO|WARN|ERROR)").Default("INFO").String()
)
func Run(ctx context.Context) error {
kingpin.MustParse(app.Parse(os.Args[1:]))
logger, err := initLogger(ctx, *logLevel)
if err != nil {
return errors.Wrap(err, "failed to init logger")
}
c, err := initConfig(ctx, logger)
if err != nil {
return errors.Wrap(err, "failed to init config")
}
s, err := initServer(ctx, logger, c)
if err != nil {
return errors.Wrap(err, "failed to init server")
}
if err := runServer(ctx, logger, s); err != nil {
return errors.Wrap(err, "failed to run server")
}
return nil
}
func initLogger(_ context.Context, level string) (hclog.Logger, error) {
return hclog.New(&hclog.LoggerOptions{
Name: logName,
Level: hclog.LevelFromString(level),
}), nil
}
func initConfig(_ context.Context, _ hclog.Logger) (*config.Config, error) {
c := config.New()
return c, nil
}
func initServer(ctx context.Context, logger hclog.Logger, _ *config.Config) (server.Server, error) {
c := server.DefaultConfig()
if c == nil {
return nil, errors.New("failed to config")
}
c.Addr = *listenUrl
c.Logger = logger
return server.New(ctx, c), nil
}
func runServer(ctx context.Context, _ hclog.Logger, srv server.Server) error {
if err := srv.Init(ctx); err != nil {
return errors.New("failed to init")
}
g, ctx := errgroup.WithContext(ctx)
g.SetLimit(routineNum)
g.Go(func() error {
if err := srv.Run(ctx); err != nil {
return errors.Wrap(err, "failed to run")
}
return nil
})
s := make(chan os.Signal, 1)
// kill (no param) default send syscanll.SIGTERM
// kill -2 is syscall.SIGINT
// kill -9 is syscall.SIGKILL but can"t be caught, so don't need add it
signal.Notify(s, syscall.SIGINT, syscall.SIGTERM)
g.Go(func() error {
<-s
_ = srv.Deinit(ctx)
return nil
})
if err := g.Wait(); err != nil {
return errors.Wrap(err, "failed to wait")
}
return nil
}