Initial commit

This commit contains skeleton of the application with
uber/fx DI library.

go.mod

@@ -0,0 +1,10 @@
+module galched-bot
+
+require (
+	github.com/stretchr/testify v1.3.0 // indirect
+	go.uber.org/atomic v1.3.2 // indirect
+	go.uber.org/dig v1.7.0 // indirect
+	go.uber.org/fx v1.9.0
+	go.uber.org/goleak v0.10.0 // indirect
+	go.uber.org/multierr v1.1.0 // indirect
+)

go.sum

@@ -0,0 +1,17 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+go.uber.org/atomic v1.3.2 h1:2Oa65PReHzfn29GpvgsYwloV9AVFHPDk8tYxt2c2tr4=
+go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
+go.uber.org/dig v1.7.0 h1:E5/L92iQTNJTjfgJF2KgU+/JpMaiuvK2DHLBj0+kSZk=
+go.uber.org/dig v1.7.0/go.mod h1:z+dSd2TP9Usi48jL8M3v63iSBVkiwtVyMKxMZYYauPg=
+go.uber.org/fx v1.9.0 h1:7OAz8ucp35AU8eydejpYG7QrbE8rLKzGhHbZlJi5LYY=
+go.uber.org/fx v1.9.0/go.mod h1:mFdUyAUuJ3w4jAckiKSKbldsxy1ojpAMJ+dVZg5Y0Aw=
+go.uber.org/goleak v0.10.0 h1:G3eWbSNIskeRqtsN/1uI5B+eP73y3JUuBsv9AZjehb4=
+go.uber.org/goleak v0.10.0/go.mod h1:VCZuO8V8mFPlL0F5J5GK1rtHV3DrFcQ1R8ryq7FK0aI=
+go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
+go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=

main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"galched-bot/modules/grace"
+	"galched-bot/modules/settings"
+
+	"go.uber.org/fx"
+)
+
+type (
+	silentPrinter struct{}
+
+	appParam struct {
+		fx.In
+
+		Context  context.Context
+		Settings settings.Settings
+	}
+)
+
+func (s *silentPrinter) Printf(str string, i ...interface{}) {}
+
+func start(p appParam) {
+	log.Print("main: starting galched-bot v", p.Settings.Version)
+	<-p.Context.Done()
+}
+
+func main() {
+	var err error
+	app := fx.New(
+		fx.Logger(new(silentPrinter)),
+		fx.Provide(settings.NewSettings, grace.NewGracefulContext),
+		fx.Invoke(start))
+
+	err = app.Start(context.Background())
+	if err != nil {
+		log.Fatal(err)
+	}
+}

modules/grace/graceful.go

@@ -0,0 +1,26 @@
+package grace
+
+import (
+	"context"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+func NewGracefulContext() context.Context {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	go func() {
+		ch := make(chan os.Signal, 1)
+		signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
+		select {
+		case <-ch:
+			log.Print("ctx: caught interrupt signal")
+			cancel()
+		case <-ctx.Done():
+		}
+	}()
+
+	return ctx
+}

modules/settings/settings.go

@@ -0,0 +1,20 @@
+package settings
+
+const (
+	version          = "3.0.0"
+	discordTokenPath = "./tokens/.discordtoken"
+)
+
+type (
+	Settings struct {
+		Version          string
+		DiscordTokenPath string
+	}
+)
+
+func NewSettings() Settings {
+	return Settings{
+		Version:          version,
+		DiscordTokenPath: discordTokenPath,
+	}
+}